PATENT DOCUMENT

Publication Number: US-11799429-B2
Application Number: US-202117481092-A
Country: US
Kind Code: B2

Title: Multi-frequency band communication based on filter sharing

Abstract:
The present disclosure relates to systems and methods for operating transceiver circuitry to transmit or receive signals on various frequency ranges. To do so, a transmitter or a receiver of the transceiver circuitry is selectively coupled to or uncoupled from an antenna of the transceiver circuitry. Additionally, radio frequency filters may be individually or collectively coupled to and/or uncoupled from the antenna to filter different frequencies in the transmitting or receiving signals.

Claims:
What is claimed is: 
     
       1. A device, comprising:
 one or more antennas; 
 transmission circuitry; 
 receiver circuitry; 
 a first filter communicatively coupled to the one or more antennas; 
 a second filter communicatively coupled to the receiver circuitry; 
 a first switch configured to couple the transmission circuitry to the first filter and the one or more antennas; and 
 a second switch configured to couple the first filter and the one or more antennas to the second filter and the receiver circuitry. 
 
     
     
       2. The device of  claim 1 , comprising a controller configured to transmit a transmit signal on a first frequency band by
 closing the first switch to couple the transmission circuitry to the first filter and the one or more antennas, and 
 opening the second switch to uncouple the first filter and the one or more antennas from the second filter and the receiver circuitry. 
 
     
     
       3. The device of  claim 2 , wherein the controller is configured to transmit the transmit signal on a second frequency band non-overlapping with the first frequency band by
 closing the first switch to couple the transmission circuitry to the first filter and the one or more antennas, and 
 closing the second switch to couple the first filter and the one or more antennas to the second filter and the receiver circuitry. 
 
     
     
       4. The device of  claim 3 , wherein the controller is configured to select between the first frequency band and the second frequency band based on an indication of a communication mode. 
     
     
       5. The device of  claim 3 , comprising a third switch configured to couple the second filter to a ground terminal, the controller configured to transmit the transmit signal on the second frequency band by closing the third switch to couple the second filter to the ground terminal. 
     
     
       6. The device of  claim 3 , comprising additional receiver circuitry, a third filter communicatively coupled to the additional receiver circuitry, and a third switch configured to couple the one or more antennas and the first filter to the third filter and the additional receiver circuitry, the controller configured to receive a receive signal on a third frequency band non-overlapping with the first frequency band and the second frequency band. 
     
     
       7. The device of  claim 6 , wherein the first frequency band comprises frequencies between 24 Gigahertz (GHz) and 33 GHz, the second frequency band comprises frequencies between 37 GHz and 43 GHz, and the third frequency band comprises frequencies between 43 GHz and 48 GHz. 
     
     
       8. The device of  claim 1 , wherein the first filter comprises an inductor coupled in parallel with a capacitor. 
     
     
       9. An electronic device, comprising:
 a first switch configured to couple one or more antennas and a first filter to a first low noise amplifier via a second filter; 
 a second switch configured to couple the one or more antennas and the first filter to a power amplifier; and 
 a controller configured to 
 cause the first switch to close to transmit, via the one or more antennas, one or more transmit signals corresponding to a first frequency range; 
 cause the second switch to close to receive, via the one or more antennas, one or more receive signals corresponding to the first frequency range; and 
 cause the first switch and the second switch to open to receive, via the one or more antennas, one or more receive signals corresponding to a second frequency range. 
 
     
     
       10. The electronic device of  claim 9 , wherein the controller is configured to cause the first switch and the second switch to close to transmit, via the one or more antennas, one or more transmit signals corresponding to the second frequency range. 
     
     
       11. The electronic device of  claim 9 , comprising a third switch configured to couple the one or more antennas and the first filter to a second low noise amplifier via a third filter. 
     
     
       12. The electronic device of  claim 9 , wherein the controller is configured to receive a status indicating which of the first frequency range or the second frequency range to use. 
     
     
       13. The electronic device of  claim 9 , wherein the first frequency range comprises frequencies between 24 Gigahertz (GHz) and 33 GHz and the second frequency range comprises frequencies between 37 GHz and 43 GHz. 
     
     
       14. The electronic device of  claim 9 , wherein the controller is configured to couple the second filter to the one or more antennas and the first filter at least in part by coupling the second filter to a reference voltage terminal. 
     
     
       15. The electronic device of  claim 9 , wherein the second filter is configured to attenuate a range of frequencies based at least in part on an impedance characterizing circuitry of the second filter. 
     
     
       16. A method, comprising:
 receiving, via processing circuitry, an indication of an operational state of one or more antennas, the one or more antennas coupled to a first filter and configured to couple to a second filter; and 
 causing, via the processing circuitry, the one or more antennas to transmit signals of a first frequency band or of a second frequency band based on selective coupling of the one or more antennas to the second filter, of the first filter to a transmitter, or a combination thereof, the selective coupling being based on the operational state of the one or more antennas. 
 
     
     
       17. The method of  claim 16 , wherein causing, via the processing circuitry, the one or more antennas to transmit signals of the first frequency band or of the second frequency band comprises causing, via the processing circuitry, the first filter to be communicatively coupled to the transmitter and the second filter to be communicatively coupled to the one or more antennas to transmit signals using the second frequency band. 
     
     
       18. The method of  claim 16 , wherein causing, via the processing circuitry, the one or more antennas to transmit signals of the first frequency band or of the second frequency band comprises causing, via the processing circuitry, the first filter to be communicatively coupled to the transmitter and the second filter to be communicatively decoupled from the one or more antennas to transmit signals of the first frequency band. 
     
     
       19. The method of  claim 16 , wherein the indication of the operational state comprises an indication of a frequency band and an indication of a transmission or reception operation. 
     
     
       20. The method of  claim 16 , comprising
 receiving, via the processing circuitry, an indication that there is no subsequent transmission or reception operation, and 
 decreasing, via the processing circuitry, an amount of power supplied to a power amplifier coupled to the transmitter based on the indication.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and the benefit of U.S. patent application Ser. No. 16/917,325, entitled “MULTI-FREQUENCY BAND COMMUNICATION BASED ON FILTER SHARING”, filed Jun. 30, 2020, which is herein incorporated by reference in its entirety for all purposes. 
     BACKGROUND 
     The present disclosure relates generally to electronic devices, and more particularly, to electronic devices that utilize radio frequency signals, transmitters, and receivers for wireless communication. 
     This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present disclosure, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art. 
     Transmitters and/or receivers are commonly included in various electronic devices, and more particularly, portable electronic communication devices, such as phones (e.g., mobile and cellular phones, cordless phones, personal assistance devices), computers (e.g., laptops, tablet computers), routers (e.g., Wi-Fi routers or modems), radios, televisions, or any of various other stationary or handheld devices, to enable communication. In some electronic devices, a transmitter and a receiver are combined to form a transceiver. For ease of discussion, transceivers are discussed in the present disclosure, but it should be understood that the following descriptions may apply individually to transmitters and/or receivers (e.g., that may not be included in a transceiver). 
     Traditional electronic devices may include multiple sets of radio frequency filters that allow signals having desired frequencies to pass through and/or block signals having undesired frequencies. For example, a transmitter of an electronic device may include multiple transmit filters that each correspond to transmitting signals at different frequency bands, and a receiver of the electronic device may include multiple receive filters that each correspond to receiving signals at certain frequency bands. However, as new frequency bands are used for wireless communication, more radio frequency filters may be added to the electronic device to enable the electronic device to transmit and receive signals over the new frequency bands, taking up valuable space in the electronic devices. 
     Moreover, signal paths in conventional electronic devices may have lengths as long as a quarter-wavelength of a signal to be transmitted or received via the signal paths. While, such lengths may be used for signals having relatively narrow wavelength ranges, the quarter-wavelength signal paths may be unsuitable for communicating on wider bands of communication frequencies, such as a fifth generation (5G) network, since 5G communications use frequencies spanning a relatively large frequency band (e.g., between 24 Gigahertz (GHz) and 48 GHz). 
     Various refinements of the features noted above may exist in relation to various aspects of the present disclosure. Further features may also be incorporated in these various aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to one or more of the illustrated embodiments may be incorporated into any of the above-described aspects of the present disclosure alone or in any combination. The brief summary presented above is intended to familiarize the reader with certain aspects and contexts of embodiments of the present disclosure without limitation to the claimed subject matter. 
     SUMMARY 
     A summary of certain embodiments disclosed herein is set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of these certain embodiments and that these aspects are not intended to limit the scope of this disclosure. Indeed, this disclosure may encompass a variety of aspects that may not be set forth below. 
     An electronic device may include multiple radio frequency filters, and couple to a transmitter and a receiver to enable sharing of the radio frequency filters. In particular, the electronic device may dynamically couple an antenna to the transmitter to send transmission signals, and dynamically couple to the antenna to the receiver to receive receiving signals. The transmitter and receiver may each be dynamically coupled to multiple radio frequency filters, each of which may filter different frequency bands or ranges. Moreover, multiple radio frequency filters may be dynamically coupled to the transmitter and/or receiver at the same time to combine together and filter additional frequency bands. 
     Generally, the radio frequency filters may include a first radio frequency filter that enables signals of a first frequency band to pass through (e.g., while blocking signals outside of the first frequency band), a second radio frequency filter that enables signals of a second frequency band to pass through (e.g., while blocking signals outside of the second frequency band), and, when the first and second radio frequency filters are coupled together, the first and second radio frequency filters enable signals of a third frequency band to pass through (e.g., while blocking signals outside of the third frequency band). For example, in the case of ultra-wideband frequencies, such as those used by fifth generation (5G) networks (e.g., between 24 Gigahertz (GHz) and 48 GHz), the radio frequency filters may include a first radio frequency filter that enables signals of a first frequency band (e.g., between 24 GHz and 33 GHz) to pass through (e.g., in a first state), a second radio frequency filter that, when combined with the first radio frequency filter (e.g., in a second state), enables signals of a second frequency band (e.g., between 37 GHz and 43 GHz) to pass through, and a third frequency filter that, when combined with the first and second radio frequency filters (e.g., in a third state), enables signals of a third frequency band (e.g., between 47 GHz and 49 GHz) to pass through. It is noted that, although described in particular reference to 5G networks, and frequency bands used in the 5G networks, these systems and methods of filter sharing may be applied to a wide variety of networks and frequency ranges as long as the networks and/or frequency ranges are able to share antenna circuitry. Indeed, these systems and methods may be applied to antennas used to transmit and/or receive signals for 4G network communication, 3G network communications, 2G network communications, or the like. 
     By enabling both the transmitter and receiver to use the same radio frequency filters, and using the radio frequency filters individually and in combination to filter different frequency bands, the number of filters in the electronic device may be significantly reduced, resulting in a smaller electronic device overall and/or enabling additional components to be included in the electronic device. 
     Indeed, in some cases, a device may include a first filter coupled to an antenna and a second filter coupled to a first low noise amplifier. The device may also include a third filter coupled to a second low noise amplifier and a controller. The controller may transmit a transmit signal on a first frequency band by coupling the first filter to a power amplifier, uncoupling the second filter from the antenna and the power amplifier, and uncoupling the third filter from the antenna and the power amplifier based at least in part on one or more control signals indicating a first state. The controller may transmit the transmit signal on a second frequency band by coupling the first filter to the power amplifier, coupling the second filter to the antenna and the power amplifier, and uncoupling the third filter from the antenna and the power amplifier based at least in part on the one or more control signals indicating a second state. The controller may transmit the transmit signal on a third frequency band by coupling the first filter to the power amplifier, coupling the second filter to the antenna and the power amplifier, and coupling the third filter to the antenna and the power amplifier based at least in part on the one or more control signals indicating a third state. 
     In some systems, an electronic device may include a first switch able to couple an antenna and a first filter to a first low noise amplifier via a second filter. The electronic device may include a second switch able to couple the antenna and the first filter to a second low noise amplifier via a third filter. The electronic device may also include a third switch able to couple the antenna and the first filter to a power amplifier. The electronic device may also include a controller. The electronic device may receive a receive signal on a first frequency band based on the controller activating the first switch to couple the first low noise amplifier and the second filter to the antenna and the first filter, and deactivating the second switch and the third switch to uncouple the second low noise amplifier, the third filter, and the power amplifier from the antenna. The electronic device may receive the receive signal on a second frequency band based on the controller activating the second switch to couple the second low noise amplifier and the third filter to the antenna and the first filter, and deactivating the first switch and the third switch to uncouple the first low noise amplifier, the second filter, and the power amplifier from the antenna. Furthermore, the electronic device may receive the receive signal on a third frequency band by activating the first switch and the second switch to couple the first low noise amplifier, the second filter, the second low noise amplifier, and the third filter to the antenna and the first filter, and deactivating the third switch to uncouple the power amplifier from the antenna. 
     In yet another example, a method may include receiving a frequency band parameter and a transmission or reception (TX/RX) parameter. The frequency band parameter and the TX/RX parameter may indicate an operational state of an antenna. The antenna may be coupled to a first filter and able to couple to at least one of a second filter or a third filter. In response to the TX/RX parameter indicating a transmission operation, the method may include coupling the antenna to a power amplifier, where the power amplifier may amplify a transmit signal associated with the transmission operation. In response to the frequency band parameter indicating a first frequency band, the method may include uncoupling the second filter and the third filter from the antenna. In response to the frequency band parameter indicating a second frequency band, the method may include coupling the second filter to the antenna and uncoupling the third filter from the antenna. In response to the frequency band parameter indicating a third frequency band, the method may include coupling the second filter and the third filter to the antenna. In some cases, the method may include transmitting the transmit signal using the power amplifier and the antenna. 
     Various refinements of the features noted above may exist in relation to various aspects of the present disclosure. Further features may also be incorporated in these various aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to one or more of the illustrated embodiments may be incorporated into any of the above-described aspects of the present disclosure alone or in any combination. The brief summary presented above is intended to familiarize the reader with certain aspects and contexts of embodiments of the present disclosure without limitation to the claimed subject matter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Various aspects of this disclosure may be better understood upon reading the following detailed description and upon reference to the drawings in which: 
         FIG.  1    is a schematic block diagram of an electronic device including a transceiver, in accordance with an embodiment; 
         FIG.  2    is a perspective view of a notebook computer representing a first embodiment of the electronic device of  FIG.  1   ; 
         FIG.  3    is a front view of a handheld device representing a second embodiment of the electronic device of  FIG.  1   ; 
         FIG.  4    is a front view of another handheld device representing a third embodiment of the electronic device of  FIG.  1   ; 
         FIG.  5    is a front view of a desktop computer representing a fourth embodiment of the electronic device of  FIG.  1   ; 
         FIG.  6    is a front view and side view of a wearable electronic device representing a fifth embodiment of the electronic device of  FIG.  1   ; 
         FIG.  7    is a circuit diagram of at least a portion of a transceiver of the electronic device of  FIG.  1    including transmitter circuitry, receiver circuitry, and radio frequency filtering circuitry shared by the transmitter and receiver circuitries, in accordance with an embodiment; 
         FIG.  8    is a circuit diagram of the transceiver of  FIG.  7    operating to transmit radio frequency (RF) signals having a first frequency range (e.g., approximately between 24 Gigahertz (GHz) and 33 GHz), in accordance with an embodiment; 
         FIG.  9    is a circuit diagram of the transceiver of  FIG.  7    operating to transmit RF signals having a second frequency range (e.g., approximately between 37 GHz and 43 GHz), in accordance with an embodiment; 
         FIG.  10    is a circuit diagram of at least a portion of the transceiver of  FIG.  7    operating to transmit RF signals having a third frequency of (e.g., approximately 48 GHz), in accordance with an embodiment; 
         FIG.  11    is a circuit diagram of at least a portion of the transceiver of  FIG.  7    operating to receive RF signals having the first frequency range (e.g., approximately between 24 GHz and 33 GHz), in accordance with an embodiment; 
         FIG.  12    is a circuit diagram of at least a portion of the transceiver of  FIG.  7    operating to receive RF signals having the second frequency range (e.g., approximately between 37 GHz and 43 GHz), in accordance with an embodiment; 
         FIG.  13    is a circuit diagram of the transceiver of  FIG.  7    operating to receive RF signals having the third frequency (e.g., approximately 48 GHz), in accordance with an embodiment; and 
         FIG.  14    is a flowchart illustrating a method for operating the electronic device of  FIG.  1    to transmit and/or receive RF signals having a frequency range approximately between 24 GHz and 33 GHz, a frequency range approximately between 37 GHz and 43 GHz, and/or a frequency of approximately 48 GHz, in accordance with an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     One or more specific embodiments of the present disclosure will be described below. These described embodiments are examples of the presently disclosed techniques. Additionally, in an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers&#39; specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure. 
     When introducing elements of various embodiments of the present disclosure, the articles “a,” “an,” and “the” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Additionally, it should be understood that references to “one embodiment” or “an embodiment” of the present disclosure are not intended to be interpreted as excluding the existence of additional embodiments that also incorporate the recited features. 
     Various processes are disclosed that may be used to adjust an operating frequency range of a transceiver. The processes may apply to a variety of electronic devices. In some embodiments, a control system (e.g., a controller) of an electronic device may couple or uncouple a transmitter and/or a receiver to or from an antenna. The control system may also couple or uncouple one or more radio frequency filters to and from the transmitter or receiver, individually or in combination, to filter signals of different frequencies. These processes bring certain advantages to operation, as is described herein. With the foregoing in mind, a general description of suitable electronic devices that may include such a transceiver is provided below. 
     Turning first to  FIG.  1   , an electronic device  10  according to an embodiment of the present disclosure may include, among other things, one or more of processor(s)  12 , memory  14 , nonvolatile storage  16 , a display  18 , a controller  20 , input structures  22 , an input/output (I/O) interface  24 , a network interface  26 , a transceiver  28 , and a power source  30 . The various functional blocks shown in  FIG.  1    may include hardware elements (including circuitry), software elements (including computer code stored on a computer-readable medium) or a combination of both hardware and software elements. Furthermore, a combination of elements may be included in tangible, non-transitory, and machine-readable medium that include machine-readable instructions. The instructions may be executed by the processor  12  and may cause the processor  12  to perform operations as described herein. It should be noted that  FIG.  1    is merely one example of a particular embodiment and is intended to illustrate the types of elements that may be present in the electronic device  10 . 
     By way of example, the electronic device  10  may represent a block diagram of the notebook computer depicted in  FIG.  2   , the handheld device depicted in  FIG.  3   , the handheld device depicted in  FIG.  4   , the desktop computer depicted in  FIG.  5   , the wearable electronic device depicted in  FIG.  6   , or similar devices. It should be noted that the processor  12  and other related items in  FIG.  1    may be generally referred to herein as “data processing circuitry.” Such data processing circuitry may be embodied wholly or in part as software, firmware, hardware, or any combination thereof. Furthermore, the data processing circuitry may be a single contained processing module or may be incorporated wholly or partially within any of the other elements within the electronic device  10 . 
     In the electronic device  10  of  FIG.  1   , the processor  12  may operably couple with the memory  14  and the nonvolatile storage  16  to perform various algorithms. Such programs or instructions executed by the processor  12  may be stored in any suitable article of manufacture that includes one or more tangible, computer-readable media at least collectively storing the instructions or processes, such as the memory  14  and the nonvolatile storage  16 . The memory  14  and the nonvolatile storage  16  may include any suitable articles of manufacture for storing data and executable instructions, such as random-access memory, read-only memory, rewritable flash memory, hard drives, and optical discs. Also, programs (e.g., an operating system) encoded on such a computer program product may also include instructions executable by the processor  12  to enable the electronic device  10  to provide various functionalities. 
     In certain embodiments, the display  18  may be a liquid crystal display (LCD), which may facilitate users to view images generated on the electronic device  10 . In some embodiments, the display  18  may include a touch screen, which may facilitate user interaction with a user interface of the electronic device  10 . Furthermore, it should be appreciated that, in some embodiments, the display  18  may include one or more organic light emitting diode (OLED) displays, or some combination of LCD panels and OLED panels. 
     A controller  20  may also be inducted in the electronic device  10 . The controller  20  may include one or more of the processors  12 . In some cases, the controller  20  may operate circuitry to input or output data generated by the electronic device  10 . For example, the controller  20  may control and/or operate the memory  14 , the storage  16 , display  18 , input structures  22 , an input/output (I/O interface)  24 , a network interface  26 , a transceiver  28 , a power source  29 , or the like to perform operations of the electronic device  10  and/or to facilitate control of the operations of the electronic device. In particular, the controller  20  may generate control signals for operating the transceiver  28  to transmit and/or receive data on one or more communication networks. 
     The input structures  22  of the electronic device  10  may enable a user to interact with the electronic device  10  (e.g., pressing a button to increase or decrease a volume level). The I/O interface  24  may enable the electronic device  10  to interface with various other electronic devices, as may the network interface  26 . The network interface  26  may include, for example, one or more interfaces for a personal area network (PAN), such as a BLUETOOTH® network, for a local area network (LAN) or wireless local area network (WLAN), such as an 802.11x WI-FI® network, and/or for a wide area network (WAN), such as a 3 rd  generation (3G) cellular network, 4th generation (4G) cellular network, long term evolution (LTE®) cellular network, long term evolution license assisted access (LTE-LAA) cellular network, 5th generation (5G) cellular network, or New Radio (NR) cellular network. The network interface  26  may also include one or more interfaces for, for example, broadband fixed wireless access networks (e.g., WIMAX®), mobile broadband Wireless networks (mobile WIMAX®), asynchronous digital subscriber lines (e.g., ADSL, VDSL), digital video broadcasting-terrestrial (DVB-T®) network and its extension DVB Handheld (DVB-H®) network, ultra-wideband (UWB) network, alternating current (AC) power lines, and so forth. 
     In some embodiments, the electronic device  10  communicates over the aforementioned wireless networks (e.g., WI-FI®, WIMAX®, mobile WIMAX®, 4G, LTE®, 5G, and so forth) using the transceiver  28 . The transceiver  28  may include circuitry useful in both wirelessly receiving and wirelessly transmitting signals (e.g., data signals, wireless data signals, wireless carrier signals, RF signals), such as a transmitter and/or a receiver. Indeed, in some embodiments, the transceiver  28  may include a transmitter and a receiver combined into a single unit, or, in other embodiments, the transceiver  28  may include a transmitter separate from a receiver. The transceiver  28  may transmit and/or receive RF signals to support voice and/or data communication in wireless applications such as, for example, PAN networks (e.g., BLUETOOTH®), WLAN networks (e.g., 802.11x WI-FI®), WAN networks (e.g., 3G, 4G, 5G, NR, and LTE® and LTE-LAA cellular networks), WIMAX® networks, mobile WIMAX® networks, ADSL and VDSL networks, DVB-T® and DVB-H® networks, UWB networks, and so forth. As further illustrated, the electronic device  10  may include the power source  30 . The power source  30  may include any suitable source of power, such as a rechargeable lithium polymer (Li-poly) battery and/or an alternating current (AC) power converter. 
     In certain embodiments, the electronic device  10  may take the form of a computer, a portable electronic device, a wearable electronic device, or other type of electronic device. Such computers may be generally portable (such as laptop, notebook, and tablet computers) and/or those that are generally used in one place (such as conventional desktop computers, workstations and/or servers). In certain embodiments, the electronic device  10  in the form of a computer may be a model of a MacBook®, MacBook® Pro, MacBook Air®, iMac®, Mac® mini, or Mac Pro® available from Apple Inc. of Cupertino, Calif. By way of example, the electronic device  10 , taking the form of a notebook computer  10 A, is illustrated in  FIG.  2    in accordance with one embodiment of the present disclosure. The notebook computer  10 A may include a housing or the enclosure  36 , the display  18 , the input structures  22 , and ports associated with the I/O interface  24 . In one embodiment, the input structures  22  (such as a keyboard and/or touchpad) may enable interaction with the notebook computer  10 A, such as starting, controlling, or operating a graphical user interface (GUI) and/or applications running on the notebook computer  10 A. For example, a keyboard and/or touchpad may facilitate user interaction with a user interface, GUI, and/or application interface displayed on display  18 . 
       FIG.  3    depicts a front view of a handheld device  10 B, which represents one embodiment of the electronic device  10 . The handheld device  10 B may represent, for example, a portable phone, a media player, a personal data organizer, a handheld game platform, or any combination of such devices. By way of example, the handheld device  10 B may be a model of an iPod® or iPhone® available from Apple Inc. of Cupertino, Calif. The handheld device  10 B may include the enclosure  36  to protect interior elements from physical damage and to shield them from electromagnetic interference. The enclosure  36  may surround the display  18 . The I/O interface  24  may open through the enclosure  36  and may include, for example, an I/O port for a hard wired connection for charging and/or content manipulation using a standard connector and protocol, such as the Lightning connector provided by Apple Inc. of Cupertino, Calif., a universal serial bus (USB), or other similar connector and protocol. 
     The input structures  22 , in combination with the display  18 , may enable user control of the handheld device  10 B. For example, the input structures  22  may activate or deactivate the handheld device  10 B, navigate a user interface to a home screen, present a user-editable application screen, and/or activate a voice-recognition feature of the handheld device  10 B. Other of the input structures  22  may provide volume control, or may toggle between vibrate and ring modes. The input structures  22  may also include a microphone to obtain a user&#39;s voice for various voice-related features, and a speaker to enable audio playback. The input structures  22  may also include a headphone input to enable input from external speakers and/or headphones. 
       FIG.  4    depicts a front view of another handheld device  10 C, which represents another embodiment of the electronic device  10 . The handheld device  10 C may represent, for example, a tablet computer, or one of various portable computing devices. By way of example, the handheld device  10 C may be a tablet-sized embodiment of the electronic device  10 , which may be, for example, a model of an iPad® available from Apple Inc. of Cupertino, Calif. 
     Turning to  FIG.  5   , a computer  10 D may represent another embodiment of the electronic device  10  of  FIG.  1   . The computer  10 D may be any computer, such as a desktop computer, a server, or a notebook computer, but may also be a standalone media player or video gaming machine. By way of example, the computer  10 D may be an iMac®, a MacBook®, or other similar device by Apple Inc. of Cupertino, Calif. It should be noted that the computer  10 D may also represent a personal computer (PC) by another manufacturer. The enclosure  36  may protect and enclose internal elements of the computer  10 D, such as the display  18 . In certain embodiments, a user of the computer  10 D may interact with the computer  10 D using various peripheral input devices, such as keyboard  22 A or mouse  22 B (e.g., input structures  22 ), which may operatively couple to the computer  10 D. 
     Similarly,  FIG.  6    depicts a wearable electronic device  10 E representing another embodiment of the electronic device  10  of  FIG.  1   . By way of example, the wearable electronic device  10 E, which may include a wristband  43 , may be an Apple Watch® by Apple Inc. of Cupertino, Calif. However, in other embodiments, the wearable electronic device  10 E may include any wearable electronic device such as, a wearable exercise monitoring device (e.g., pedometer, accelerometer, heart rate monitor), or other device by another manufacturer. The display  18  of the wearable electronic device  10 E may include a touch screen version of the display  18  (e.g., LCD, OLED display, active-matrix organic light emitting diode (AMOLED) display, and so forth), as well as the input structures  22 , which may facilitate user interaction with a user interface of the wearable electronic device  10 E. In certain embodiments, as previously noted above, each embodiment (e.g., notebook computer  10 A, handheld device  10 B, handheld device  10 C, computer  10 D, and wearable electronic device  10 E) of the electronic device  10  may include the transceiver  28 . 
     Keeping the foregoing in mind,  FIG.  7    is a circuit diagram of at least a portion of the transceiver  28  operating to transmit and/or receive radio frequency (RF) signals using transmitter circuitry  50 , receiver circuitry  51 , and circuitry shared by the transmitter and receiver circuitries  50 ,  51  (shared circuitry  52 ), according to embodiments of the present disclosure. The transmitter circuitry  50  may include transmitter processing circuitry  54  that processes transmission signals and sends the processed transmission signals to a power amplifier  56  for amplification prior to transmission via an antenna  57 . The receiver circuitry  51  receives signals from the antenna  57  as part of a receive operation and may amplify the received signals using one or more low noise amplifiers (LNAs)  60  ( 60 A,  60 B) prior to sending the signals to receiver processing circuitry  58  ( 58 A,  58 B) for processing. 
     The one or more LNAs  60  may increase a magnitude of a signal without increasing noise of the signal. For example, LNAs  60 A,  60 B may respectively receive a receive signal from the antenna  57 , depending on which receive mode the transceiver  28  is using, and increase the magnitude of a signal without increasing noise of the receive signal. Although two LNAs  60  are depicted, it should be understood that any number of LNAs may be implemented in the transceiver  28 , such as two, three, four, or more LNAs to amplify any suitable number of frequency bands. In the illustrated embodiment, the LNA  60 A may process relatively lower frequencies (e.g., corresponding to a low-band or mid-band low noise amplifier) and the LNA  60 B may process relatively higher frequencies (e.g., corresponding to a high-band low noise amplifier). In some embodiments, a controller  20  or other circuitry of the receiver circuitry  51  (not depicted) may regulate power supplied to the LNAs  60 A,  60 B according to average power tracking of the modified signal or envelope tracking of the signal. 
     Receive signals output from the LNAs  60 A,  60 B or other circuitry of the receiver circuitry  51  may be transmitted to the receiver processing circuitry  58  for additional processing, such as by filtering and/or demodulating the signals. The receiver processing circuitry  58  may include any suitable hardware or software to perform a variety of signal-improving or signal-analysis operations on a receive signal from the antenna  57 . For example, the receiver processing circuitry  58  may include an analog-to-digital converter, additional filtering circuitry, phase shifting circuitry (e.g., 180 degree phase shifter) or the like. 
     The shared circuitry  52  may be used by both the transmitter circuitry  50  for transmitting signals and the receiver circuitry  51  for receiving signals. The shared circuitry  52  thus includes the antenna  57 , as well as radio circuitry filtering circuitry that may enable pass through of signals of desired frequencies or blocking of signals of undesired frequencies. In particular, the transmitter circuitry  50  may include switching circuitry  62  (e.g., switch  62 A) that enables the transmitter circuitry  50  to couple to the antenna  57  to send signals and uncouple from the antenna  57  (e.g., when the receiver circuitry  51  receives signals). Similarly, the receiver circuitry  51  may include switching circuitry  62  (e.g., switch  62 F,  62 G) that enables the receiver circuitry  51  to couple to the antenna  57  to receive signals and uncouple from the antenna  57  (e.g., when the transmitter circuitry  50  sends signals). 
     In particular, the power amplifier  56  may be coupled to the antenna  57  through a switch  62 A when turned on (e.g., activated to enable current to flow through) via control signal S 1 . The switch  62 A and/or any switching circuitry  62  (e.g.,  62 B,  62 C,  62 D,  62 E,  62 F,  62 G) discussed herein may be any suitable transistor or switching device, such as a metal-oxide-semiconductor field-effect transistor (MOSFET), insulated-gate bipolar transistor (IGBT), or the like, and may each be controlled by respective control signals S (e.g., S 1 , S 2 , S 3 , S 4 , S 5 ). A controller  20  may transmit a control signal (e.g., control signal S 2 ) having a voltage value suitable to cause the terminals of the respective transistors used for the switching circuitry  62  to conduct, thus respectively turning on, or activating, the switching circuitry  62 . When a voltage value is unsuitable to cause the terminals to conduct, it may be said that the switching circuitry  62  is deactivated or turned off. 
     The antenna  57  may also be coupled to a filter  64 . The filter  64  may remove (e.g., filter, attenuate to zero amplitude or to a lower amplitude) signals characterized by a frequency lower or higher than a threshold frequency range. In this way, the filter  64  may improve an RF signal quality (e.g., reduce noise, isolate desired frequencies from undesired frequencies). The filter  64  is shown to include an inductor  66  coupled in parallel with a capacitor  68 . However, it should be understood that any combination of filtering circuitry and/or attenuation circuitry may be used to pass a desired range of frequencies. For example, any suitable filter or attenuation circuitry may be used in place of or in addition to the filter  64 , and the filter  64  may be considered a high pass filter, a bandpass filter, or the like. The shared circuitry  52  may also include additional radio frequency filtering circuitry (e.g., filters  70 A,  70 B) that may individually filter signals of different radio frequency bands, and, when joined in combination, filter signals of additional radio frequency bands. 
     For example, the filter  64  may be used alone to pass transmit or receive signals within a first frequency range (e.g., between 24 Gigahertz (GHz) and 33 GHz) and block signals outside of the first frequency range. When the filter  64  is combined with a filter  70 A, such as through at least the switch  62 B, the combination of filtering circuitry may be used to pass transmit or receive signals within a second frequency range (e.g., between 37 GHz and 43 GHz) and block signals outside of the second frequency range. Furthermore, when the filter  64  is combined with the filter  70 A and a filter  70 B, such as through the switches  62 B and  62 C, the combination of filtering circuitry may be used to pass transmit or receive signals within a third frequency range (e.g., 48 GHz, between 47 GHz and 49 GHz) and block signals outside of the third frequency range. 
     By sharing filtering circuitry (e.g., filters, circuitry characterized by an impedance) between transmit operations and receive operations (e.g., by toggling on and off switches  62 A,  62 F,  62 G to couple the transmitter circuitry  50  or the receiver circuitry  51  to the shared circuitry  52 ), and selecting different filters  64 ,  70 A,  70 B (e.g., by toggling on and off switches  62 B,  62 C,  62 D,  62 E) based on desired filtering frequencies, the transceiver  28  may communicate with signals having a relatively wide variety of frequencies. These ranges, for example, may include frequencies within a threshold range of these frequencies, such as within 1 GHz, 500 Megahertz (MHz), 100 MHz, 10 MHz, 100 Hertz (Hz), and so on. It is noted that in this disclosure, three filtering circuits are used to enable the transceiver  28  to process three different frequency ranges. However, it should be understood that different filters, a different number of filters, and/or different impedances may be used to enable the transceiver  28  to process different frequency ranges (e.g., frequency ranges of different frequencies, a different number of frequency ranges). 
     To help elaborate on the transmit operations,  FIG.  8    is a circuit diagram of the transceiver  28  of  FIG.  7    operating in the first transmit mode to transmit signals (e.g., transmit signal  72 ) having a first frequency range (e.g., approximately between 24 GHz and 33 GHz), according to embodiments of the present disclosure and corresponding to operations of at least block  122  of  FIG.  14   . It is noted, as used in the figures, when a switch is represented with a solid line, the switch is on or closed (e.g., able to conduct), and when a switch is represented with a dashed line, the switch is off or open (e.g., not conducting). The signals described above may be processed by the transceiver  28 . While in the first transmit mode, the transceiver  28  may process signals having frequencies in the first frequency range. 
     In particular, the filter  64  may enable frequencies of the transmit signal  72  within the first frequency range to pass through, while block frequencies of the transmit signal  72  that are outside the first frequency range. To do so, a controller  20  of the processors  12  may turn on the switch  62 A to couple the transmitter circuitry  50 , via the power amplifier  56 , to the filter  64  and the antenna  57 . The controller  20  may also turn off the switch  62 B to uncouple the filter  70 A, the LNA  60 A, and the receiver processing circuitry  58 A from the antenna  57 . As such, the transmit signal  72  may not be filtered by the filter  70 A, and may be isolated from the LNA  60 A and the receiver processing circuitry  58 A. Similarly, the controller  20  may additionally turn off the switch  62 C to uncouple the filter  70 B, the LNA  60 B, and the receiver processing circuitry  58 B from the antenna  57 . As such, the transmit signal  72  may not be filtered by the filter  70 B, and may be isolated from the LNA  60 B and the receiver processing circuitry  58 B. Furthermore, the controller  20  may operate the switch  62 D off, the switch  62 E off, the switch  62 F off, and the switch  62 G off. 
     When the switches operate in this configuration, the transceiver  28  uses the filter  64  to process the transmit signal  72  output from the transmitter processing circuitry  54  for transmission, but does not use the filter  70 A and the filter  70 B. Moreover, the transmit signal  72  is isolated from the receiver circuitry  51 . To filter frequencies from the transmit signal  72  different than the first frequency band, instead of using a completely different filter or set of filters than the filter  64 , an additional filter (e.g., the filter  70 A) may be combined with the filter  64 . This is shown in  FIG.  9   . 
       FIG.  9    is a circuit diagram of the transceiver  28  of  FIG.  7    operating in the second transmit mode to transmit signals (e.g., transmit signal  72 ) having a second frequency range (e.g., approximately between 37 GHz and 43 GHz), according to embodiments of the present disclosure and corresponding to operations of at least block  126  of  FIG.  14   . The combination of the filter  64  and the filter  70 A may enable frequencies of the transmit signal  72  within the second frequency range to pass through to the antenna  57 , while blocking frequencies of the transmit signal  72  that are outside the second frequency range from passing through. 
     To do so, the controller  20  of the processors  12  may turn on the switch  62 A to couple the transmitter circuitry  50 , via the power amplifier  56 , to the filter  64  and the antenna  57 . The controller  20  may also turn on the switch  62 B and the switch  62 D to couple the filter  70 A to the filter  64 , the antenna  57 , and the power amplifier  56 . However, the controller  20  may turn off the switch  62 F to decouple the LNA  60 A and the receiver processing circuitry  58 A from the antenna  57 . As such, the transmit signal  72  may be filtered by the filter  70 A in combination with the filter  64 , and may be isolated from the LNA  60 A and the receiver processing circuitry  58 A. The controller  20  may additionally turn off the switch  62 C to uncouple the filter  70 B, the LNA  60 B, and the receiver processing circuitry  58 B from the antenna  57 . As such, the transmit signal  72  may not be filtered by the filter  70 B, and may be isolated from the LNA  60 B and the receiver processing circuitry  58 B. Furthermore, the controller  20  may operate the switch  62 E off, the switch  62 F off, and the switch  62 G off. 
     When the switches operate in this configuration, the transceiver  28  uses the filter  64  and the filter  70 A to process the transmit signal  72  output from the transmitter processing circuitry  54  for transmission, but does not use the filter  70 B. Moreover, the transmit signal  72  is isolated from the receiver circuitry  51 . To filter frequencies from the transmit signal  72  different than the first and second frequency bands, instead of using a completely different filter or set of filters than the filter  64 , an additional filter (e.g., the filter  70 B) may be combined with the filter  64  and the filter  70 A. This is shown in  FIG.  10   . 
       FIG.  10    is a circuit diagram of the transceiver  28  of  FIG.  7    operating in the third transmit mode to transmit signals (e.g., transmit signal  72 ) having a third frequency range (e.g., approximately 48 GHz, between approximately 47 GHz and 49 GHz), according to embodiments of the present disclosure and corresponding to operations of at least block  128  of  FIG.  14   . The combination of the filter  64 , the filter  70 A, and the filter  70 B may enable frequencies of the transmit signal  72  within the third frequency range to pass through, while blocking frequencies of the transmit signal  72  that are outside the second frequency range from passing through to the antenna  57 . 
     To do so, a controller  20  of the processors  12  may turn on the switch  62 A to couple the transmitter circuitry  50 , via the power amplifier  56 , to the filter  64  and the antenna  57 . The controller  20  may turn on the switch  62 B and the switch  62 D to couple the filter  70 A to the filter  64 , the antenna  57 , and the power amplifier  56 . The controller  20  may also turn on the switch  62 C and the switch  62 E to couple the filter  70 B to the filter  64 , the filter  70 A, the antenna  57 , and the power amplifier  56 . However, the controller  20  may turn off the switch  62 F to decouple the LNA  60 A and the receiver processing circuitry  58 A from the antenna  57  and may turn off the switch  62 G to decouple the LNA  60 B and the receiver processing circuitry  58 B from the antenna  57 . As such, the transmit signal  72  may be filtered by the filter  70 A and the filter  70 B, and may be isolated from the LNA  60 A, the LNA  60 B, the receiver processing circuitry  58 A, and the receiver processing circuitry  58 B. 
     When the switches operate in this configuration, the transceiver  28  uses the filter  64 , the filter  70 A, and the filter  70 B to process the transmit signal  72  transmitted from the transmitter processing circuitry  54  for transmission. Moreover, the transmit signal  72  is isolated from the receiver circuitry  51 . To filter frequencies of signals received instead of transmit signals (e.g., transmit signal  72 ), instead of using a completely different filter or set of filters than the filter  64 , the filter  70 A may be combined with the filter  64 . This is shown in  FIG.  11   . 
     To elaborate, the transceiver  28  may be operated to transmit the transmit signal  72  after amplification via power amplifier  56 . In some cases, however, the transceiver  28  may be used to receive one or more RF signals. Advantageously, the same filters  64 ,  70 A,  70 B of the shared circuitry  52  used by the transmitter circuitry  50  may be reused by the receiver circuitry  51  to filter the same or similar frequency bands. In this manner, space reserved for receiver filtering circuitry separate from transmitter filtering circuitry may be reclaimed or used for additional components in the electronic device  10 . 
     For example,  FIG.  11    is a circuit diagram of the transceiver  28  in a first receive mode, according to embodiments of the present disclosure and corresponding to operations of at least block  134  of  FIG.  14   . The combination of the filter  64  and the filter  70 A may enable frequencies of a receive signal  100  within the first frequency range (e.g., between 24 GHz and 33 GHz) to pass through to the receiver processing circuitry  58 A, while blocking frequencies of the receive signal  100  that are outside the first frequency range from passing through. 
     To do so, the controller  20  of the processors  12  may turn off the switch  62 A to decouple the transmitter circuitry  50 , via the power amplifier  56 , from the filter  64  and the antenna  57 . The controller  20  may turn on the switch  62 B and may turn off the switch  62 D to couple the filter  70 A to the filter  64 , the antenna  57 , and the LNA  60 A. However, the controller  20  may turn off the switch  62 C and the switch  62 E to decouple the filter  70 B from the antenna  57 . The controller  20  may turn off the switch  62 G to decouple the LNA  60 B and the receiver processing circuitry  58 B from the antenna  57 . As such, the receive signal  100  may be filtered by the filter  70 A in combination with the filter  64  without being filtered by the filter  70 B, and may be isolated from the LNA  60 B and the receiver processing circuitry  58 B. 
     When the switches operate in this configuration, the transceiver  28  uses the filter  64  and the filter  70 A to process the receive signal  100  received at the antenna  57 , but does not use the filter  70 B. Moreover, the receive signal  100  is isolated from the transmitter circuitry  50 . To filter frequencies from the receive signal  100  different than the first frequency band, instead of using a completely different filter or set of filters than the filter  64 , an additional filter (e.g., the filter  70 B) may be combined with the filter  64  instead of the filter  70 A. This is shown in  FIG.  12   . 
     The controller  20  may also be able to operate the transceiver  28  in a second receive mode to receive the receive signal  100  using the second frequency range. For example,  FIG.  12    is a circuit diagram of the transceiver  28  in the second receive mode, according to embodiments of the present disclosure and corresponding to operations of at least block  138  of  FIG.  14   . The combination of the filter  64  and the filter  70 A may enable frequencies of a receive signal  100  within the second frequency range (e.g., between 37 GHz and 43 GHz) to pass through to the receiver processing circuitry  58 B, while blocking frequencies of the receive signal  100  that are outside the second frequency range from passing through. 
     To do so, the controller  20  of the processors  12  may turn off the switch  62 A to decouple the transmitter circuitry  50 , via the power amplifier  56 , from the filter  64  and the antenna  57 . The controller  20  may turn on the switch  62 C and may turn off the switch  62 E to couple the filter  70 B to the filter  64 , the antenna  57 , and the LNA  60 B. The controller  20  may turn off the switch  62 B and the switch  62 D to decouple the filter  70 A from the antenna  57 . The controller  20  may turn off the switch  62 F to decouple the LNA  60 A and the receiver processing circuitry  58 A from the antenna  57 . As such, the receive signal  100  may be filtered by the filter  70 B in combination with the filter  64  without being filtered by the filter  70 A, and may be isolated from the LNA  60 A and the receiver processing circuitry  58 A. 
     When the switches operate in this configuration, the transceiver  28  uses the filter  64  and the filter  70 B to process the receive signal  100  received at the antenna  57 , but does not use the filter  70 A. Moreover, the receive signal  100  is isolated from the transmitter circuitry  50 . To filter frequencies from the receive signal  100  different than the first or second frequency bands, instead of using a completely different filter or set of filters than the filter  64 , the filter  70 B may be combined with the filter  64  and the filter  70 A. This is shown in  FIG.  13   . 
       FIG.  13    is a circuit diagram of the transceiver  28  in a third receive mode, according to embodiments of the present disclosure and corresponding to operations of at least block  140  of  FIG.  14   . The combination of the filter  64 , the filter  70 A, and the filter  70 B may enable frequencies of a receive signal  100  within the third frequency range (e.g., approximately 48 GHz, between approximately 47 GHz and 49 GHz) to pass through to the receiver processing circuitry  58 B, while blocking frequencies of the receive signal  100  that are outside the third frequency range. 
     To do so, the controller  20  of the processors  12  may turn off the switch  62 A to decouple the transmitter circuitry  50 , via the power amplifier  56 , from the filter  64  and the antenna  57 . The controller  20  may turn on the switch  62 C and may turn off the switch  62 E to couple the filter  70 B to the filter  64 , the antenna  57 , and the LNA  60 B. The controller  20  may turn on the switch  62 B and the switch  62 D to couple the filter  70 A to the antenna  57 , the filter  64 , and the filter  70 B. The controller  20  may turn off the switch  62 F to decouple the LNA  60 A and the receiver processing circuitry  58 A from the antenna  57 . As such, the receive signal  100  may be filtered by the filter  70 B in combination with the filter  64  and the filter  70 A, and may be isolated from the LNA  60 A and the receiver processing circuitry  58 A. 
     When the switches operate in this configuration, the transceiver  28  uses the filter  64 , the filter  70 A, and the filter  70 B to process the receive signal  100  received at the antenna  57 . Moreover, the receive signal  100  is isolated from the transmitter circuitry  50 . For ease of description, the various operational modes of the transceiver  28  may be summarized in Table 1 below. It is noted that Table 1 outlines relative states of the certain switching circuitry  62 , and how the combination of operation of the switching circuitry  62  corresponds to the various operational modes of the transceiver  28 , where switch  62 A corresponds to S 1 , the switch  62 B corresponds to S 2 , the switch  62 C corresponds to S 3 , the switch  62 D corresponds to S 4 , the switch  62 E corresponds to S 5 , the switch  62 F corresponds to S 6 , and the switch  62 G corresponds to S 7 . In some cases, Table 1 also outlines the states of the control signals (e.g., control signals S 1 , S 2 , S 3 , S 4 , S 5 , S 6 , S 7 ) supplied to the switching circuitry  62 . As illustrated, a control signal S that is a logic high “ON” signal activates (e.g., turns on) the corresponding switching circuitry  62  to close a circuit, while a control signal S that is a logic low “OFF” signal deactivates (e.g., turns off) the corresponding switching circuitry  62  to open a circuit. 
     
       
         
           
               
               
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 Operational Mode of  
                   
                   
                   
                   
                   
                   
                   
               
               
                 Transceiver 28 
                 S1 
                 S2 
                 S3 
                 S4 
                 S5 
                 S6 
                 S7 
               
               
                   
               
             
            
               
                 First transmit mode  
                 ON 
                 OFF 
                 OFF 
                 OFF 
                 OFF 
                 OFF 
                 OFF 
               
               
                 (e.g., FIG. 8) 
                   
                   
                   
                   
                   
                   
                   
               
               
                 Second transmit mode  
                 ON 
                 ON 
                 OFF 
                 ON 
                 OFF 
                 OFF 
                 OFF 
               
               
                 (e.g., FIG. 9) 
                   
                   
                   
                   
                   
                   
                   
               
               
                 Third transmit mode  
                 ON 
                 ON 
                 ON 
                 ON 
                 ON 
                 OFF 
                 OFF 
               
               
                 (e.g., FIG. 10) 
                   
                   
                   
                   
                   
                   
                   
               
               
                 First receive mode  
                 OFF 
                 ON 
                 OFF 
                 OFF 
                 OFF 
                 ON 
                 OFF 
               
               
                 (e.g., FIG. 11) 
                   
                   
                   
                   
                   
                   
                   
               
               
                 Second receive mode  
                 OFF 
                 OFF 
                 ON 
                 OFF 
                 OFF 
                 OFF 
                 ON 
               
               
                 (e.g., FIG. 12) 
                   
                   
                   
                   
                   
                   
                   
               
               
                 Third receive mode  
                 OFF 
                 ON 
                 ON 
                 ON 
                 OFF 
                 OFF 
                 ON 
               
               
                 (e.g., FIG. 13) 
               
               
                   
               
            
           
         
       
     
     To clarify further on the operation of the transceiver  28 ,  FIG.  14    is a flowchart of a method  110  for operating the electronic device  10  to transmit and/or receive RF signals using a frequency range (e.g., between approximately 24 GHz and 33 GHz), a second frequency range (e.g., between approximately 37 GHz and 43 GHz), and/or a third frequency range (e.g., between approximately 47 GHz and 49 GHz, approximately 48 GHz), according to embodiments of the present disclosure. It is noted that, although depicted in a particular order, the blocks of the method  110  may be performed in any suitable order. As described herein, the method  110  is described as performed by the controller  20 , however, it should be understood that any suitable processing and/or control circuitry may perform some or all of the operations of the method  110 , such as one or more of the processors  12 . 
     At block  112 , the controller  20  may receive a frequency band parameter and a transmission or reception (TX/RX) parameter. These parameters may be received in same or different data packets. In some cases, the controller  20  may receive the frequency band parameter and/or the TX/RX parameter by reading a status of a register, such as a configuration register, or other suitable types of memory or storage elements of the electronic device  10 . The frequency band parameter may indicate which frequency range a portion of the transceiver  28  is to be programmed to use. The TX/RX parameter may indicate whether the portion of the transceiver  28  is to be programmed to transmit and/or to receive signals. It is noted that in some embodiments, the frequency band parameter may expressly indicate the first frequency range or the second frequency range. Absent of either indication, the controller  20  may default to controlling the transceiver  28  to operate using the third frequency range. In some cases, the controller  20  may default to one of the other frequency ranges and/or to one of the other operational modes. 
     After receiving and/or accessing the frequency band parameter and/or the TX/RX parameter, the controller  20  may, at block  114 , determine whether the TX/RX parameter indicates a transmission operation or a reception operation. The controller  20  may interpret a state or status of the TX/RX parameter to determine whether the parameter indicates a transmission operation or a reception operation. 
     When the TX/RX parameter indicates that the current operation is associated with a transmission (TX) operation, the controller  20  may, at block  116 , set a control signal state of the switch  62 A to couple the antenna  57  and the filter  64  to the power amplifier  56 . At block  120 , the controller  20  may determine whether the frequency band parameter indicates the first frequency range. When the frequency band parameter indicates the first frequency range, the controller  20  may, at block  122 , set a control signal state of the switch  62 B to uncouple the filter  70 A from the antenna  57  and the filter  64  and may set a control signal state of the switch  62 C to uncouple the filter  70 B from the antenna  57  and the filter  64  using the switch  62 C. 
     When the frequency band parameter does not indicate the first frequency range, the controller  20  may, at block  124 , determine whether the frequency band parameter indicates the second frequency range. When the frequency band parameter indicates the second frequency range, the controller  20  may, at block  126 , set control signal states of the switch  62 B and of the switch  62 D to couple the filter  70 A to the antenna  57  and the filter  64  and may set a control signal state of the switch  62 C to uncouple the filter  70 B from the antenna  57  and the filter  64 . In some embodiments, when the frequency band parameter indicates the second frequency range, the controller  20  may set a control signal state of the switch  62 D to isolate the LNA  60 A from the antenna  57  and the filter  64 . The controller  20  may also set control signal states of the switch  62 F and the switch  62 G to off to uncouple the LNAs  60 A,  60 B from the antenna  57  and the filter  64 . 
     When the frequency band parameter does not indicate the first frequency range or the second frequency range, the controller  20  may, at block  128 , default to operating in the third transmit mode, and thus may set control signal states of the switch  62 B and the switch  62 D to couple the filter  70 A to the antenna  57  and the filter  64 , and may set control signal states of the switch  62 C and the switch  62 E to couple the filter  70 B to the antenna  57  and the filter  64 . The controller  20  may set a control signal state of the switch  62 F to uncouple the LNA  60 A from the antenna  57  during the third transmit mode and may set a control signal state of the switch  62 G to uncouple the LNA  60 B from the antenna  57  during the third transmit mode. 
     After the various filters  70  are coupled or uncoupled to the antenna  57  and/or the filter  64  according to the blocks discussed above, at block  130 , the transmit signal  72  may be transmitted from the power amplifier  56  to the antenna  57 . The controller  20  may initiate the transmission of the transmit signal  72 , and/or the transmission of the transmit signal  72  may occur automatically with consideration for time for configuration of the transceiver  28 . 
     Referring back to block  114 , when the TX/RX parameter indicates a reception operation, the controller  20  may, at block  118 , may set a control signal state of the switch  62 A to uncouple the power amplifier  56  from the antenna  57  and from the filter  64 . After, before, or while setting the control signal state to uncouple the power amplifier  56 , the controller  20  may, at block  132 , determine whether the frequency band parameter indicates the first frequency range. When the frequency band parameter indicates the first frequency range, the controller  20  may, at block  134 , set control signal states of the switch  62 B and the switch  62 F to couple the filter  70 A to the antenna  57  and the filter  64 . The controller  20  may also set a control signal state of the switch  62 C to uncouple the filter  70 B, and thus the LNA  60 B, from the antenna  57  and the filter  64  and set a control signal state of the switch  62 D to permit signals to transmit through to the LNA  60 A. 
     When the frequency band parameter does not indicate the first frequency range, the controller  20  may, at block  136 , determine whether the frequency band parameter indicates the second frequency range. When the frequency band parameter indicates the second frequency range, the controller  20  may, at block  138 , set a control signal state of the switch  62 C to couple the filter  70 B and the LNA  60 B to the antenna  57  and the filter  64 . The controller  20  may set a control signal state of the switch  62 E to permit the receive signal  100  to transmit from the antenna  57  to the LNA  60 A. The controller  20  may also set control signal states of the switch  62 B and the switch  62 D to uncouple the filter  70 A and the LNA  60 A from the antenna  57  and the filter  64 . 
     When the frequency band parameter does not indicates the first frequency range and the second frequency range, the controller  20  may, at block  140 , default to using the third frequency range and may set control signal states of the switch  62 B and the switch  62 D to couple the filter  70 A to the antenna  57  and the filter  64  without also coupling the LNA  60 A to the antenna  57  and filter  64 . The controller  20  also sets control signal states of the switch  62 C and the switch  62 E to couple the filter  70 B and the LNA  60 B by activating the switch  62 C to the antenna  57  and/or the high pass filter  64  without activating the switch  62 E. 
     After the various filters  70  are coupled or uncoupled to the antenna  57  and/or the high pass filter  64  according to the blocks discussed above, the controller  20  may, at block  142 , receive the receive signal  100  via the antenna  57 . 
     Once the transceiver  28  receives the receive signal  100  or transmits the transmit signal  72 , the controller  20  may, at block  144 , determine whether a subsequent communication operation is to be performed. To do so, the controller  20  may, for example, refer to a communication configuration defining transmission and/or reception patterns of the electronic device  10 . In some cases, the controller  20  may read a status register able to indicate whether a subsequent communication operation is to occur. If, at block  144 , the controller  20  determines that a subsequent communication operation is to occur, the controller  20  may repeat performance of the method  110 , such as by returning to block  112 . 
     However, in some cases, if the controller  20  determine that no subsequent operation is to be performed at that time, at block  146 , the controller  20  may reduce (e.g., power gate) or eliminate (e.g., remove) power supplied to at least a portion of the transceiver  28 , such as the power amplifier  56 , and/or may other halt communication operations. To do so, power supplied to the portions of the electronic device  10  (e.g., power supplied to the transceiver  28 ) may be reduced or removed entirely between communication operations. In this manner, the method  110  may enable the electronic device  10  to send or receive signals at different frequency bands by sharing and reusing radio frequency filters  64 ,  70 A,  70 B. As a result, the number of radio frequency filters in the electronic device  10  may be significantly reduced, resulting in a smaller electronic device overall and/or enabling additional components to be included in the electronic device  10 . Moreover, the method  110  and electronic devices  10  described herein may be suitable for transmitting and receiving signals of a variety of wavelengths (e.g., relatively narrow wavelengths, middle wavelengths, wide wavelengths, ultrawide wavelengths), and, as such, not suffer from the deficiencies of quarter-wavelength signal paths. 
     It is noted that, referring back to  FIG.  9    as an example, turning on the switch  62 D may also redirect leakage currents to ground (e.g., reference voltage) that may otherwise transmit to the receiver processing circuitry  58 A when combining the filter  70 A with the filter  64 . Similarly, turning on the switch  62 E may redirect leakage currents to the ground as opposed to the leakage current transmitting through to the receiver processing circuitry  58 B during a transmit operation. 
     Technical effects of the present disclosure include systems and methods for operating transceiver circuitry to transmit and/or receive signals on various frequency ranges by sharing and reusing radio frequency filters. In particular, a transmitter or a receiver of the transceiver circuitry may be selectively coupled to or uncoupled from an antenna of the transceiver circuitry. Additionally, radio frequency filters may be individually or collectively coupled and/or uncoupled to the antenna to filter different frequencies in the transmitting or receiving signals. 
     The specific embodiments described above have been shown by way of example, and it should be understood that these embodiments may be susceptible to various modifications and alternative forms. It should be further understood that the claims are not intended to be limited to the particular forms disclosed, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and scope of this disclosure. 
     The techniques presented and claimed herein are referenced and applied to material objects and concrete examples of a practical nature that demonstrably improve the present technical field and, as such, are not abstract, intangible or purely theoretical. Further, if any claims appended to the end of this specification contain one or more elements designated as “means for [perform]ing [a function] . . . ” or “step for [perform]ing [a function] . . . ”, it is intended that such elements are to be interpreted under 35 U.S.C. 112(f). However, for any claims containing elements designated in any other manner, it is intended that such elements are not to be interpreted under 35 U.S.C. 112(f).

Metadata:
Filing Date: 20210921
Publication Date: 20231024
Grant Date: 20231024
Priority Date: 20200630
Inventors: LIN, Saihua
WANG, Hongrui
EMAMI-NEYESTANAK, SOHRAB
Assignee: APPLE INC
CPC Classifications: [{"code": "H03F3/195", "inventive": true, "first": true, "tree": "[]"}, {"code": "H03F3/213", "inventive": true, "first": false, "tree": "[]"}, {"code": "H03F2200/294", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03F2200/451", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04B1/0067", "inventive": true, "first": true, "tree": "[]"}, {"code": "H03F1/223", "inventive": true, "first": true, "tree": "[]"}, {"code": "H03F3/195", "inventive": true, "first": true, "tree": "[]"}, {"code": "H03F2200/294", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03F2200/451", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03F3/195", "inventive": true, "first": false, "tree": "[]"}, {"code": "H03F3/72", "inventive": true, "first": false, "tree": "[]"}, {"code": "H03F2203/7209", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04B1/0053", "inventive": true, "first": false, "tree": "[]"}, {"code": "H04B1/525", "inventive": false, "first": false, "tree": "[]"}, {"code": "H04B1/48", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03F3/213", "inventive": true, "first": false, "tree": "[]"}, {"code": "H03F2200/451", "inventive": false, "first": false, "tree": "[]"}, {"code": "H03F2200/294", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 78990131