# Patent

## Title
Method and system for an integrated leaky wave antenna-based transmitter and on-chip power distribution

## Abstract

Methods and systems for an integrated leaky wave antenna-based transmitter and on-chip power distribution are disclosed, and may include supplying one or more bias voltages and ground for a chip including a plurality of power amplifiers (PAs) utilizing bias voltage and ground lines. One or more leaky wave antennas (LWAs) may be communicatively coupled to the power amplifiers. Wireless signals may be transmitted utilizing the LWAs integrated in the lines in the chip. Radio frequency (RF) signals may be transmitted via the plurality of LWAs. The RF signals may include 60 GHz signals and the LWAs may include microstrip and/or coplanar waveguides. A cavity length of the LWAs may be configured by a spacing between conductive lines in the microstrip and/or coplanar waveguides. The LWAs may be configured to transmit the wireless signals at a desired angle from a surface of the chip.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS/INCORPORATION BY REFERENCE
This application makes reference to, claims the benefit from, and claims priority to U.S. Provisional Application Ser. No. 61/246,618 filed on Sep. 29, 2009, and U.S. Provisional Application Ser. No. 61/185,245 filed on Jun. 9, 2009.
This application also makes reference to:

    U.S. patent application Ser. No. 12/650,212 filed on even date herewith;
    U.S. patent application Ser. No. 12/650,295 filed on even date herewith;
    U.S. patent application Ser. No. 12/650,277 filed on even date herewith;
    U.S. patent application Ser. No. 12/650,192 filed on even date herewith;
    U.S. patent application Ser. No. 12/650,224 filed on even date herewith;
    U.S. patent application Ser. No. 12/650,176 filed on even date herewith;
    U.S. patent application Ser. No. 12/650,246 filed on even date herewith; and
    U.S. patent application Ser. No. 12/650,324 filed on even date herewith; and


Each of the above stated applications is hereby incorporated herein by reference in its entirety.


FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[Not Applicable]
MICROFICHE/COPYRIGHT REFERENCE
[Not Applicable]
FIELD OF THE INVENTION
Certain embodiments of the invention relate to wireless communication. More specifically, certain embodiments of the invention relate to a method and system for an integrated leaky wave antenna-based transmitter and on-chip power distribution.
BACKGROUND OF THE INVENTION
Mobile communications have changed the way people communicate and mobile phones have been transformed from a luxury item to an essential part of every day life. The use of mobile phones is today dictated by social situations, rather than hampered by location or technology. While voice connections fulfill the basic need to communicate, and mobile voice connections continue to filter even further into the fabric of every day life, the mobile Internet is the next step in the mobile communication revolution. The mobile Internet is poised to become a common source of everyday information, and easy, versatile mobile access to this data will be taken for granted.
As the number of electronic devices enabled for wireline and/or mobile communications continues to increase, significant efforts exist with regard to making such devices more power efficient. For example, a large percentage of communications devices are mobile wireless devices and thus often operate on battery power. Additionally, transmit and/or receive circuitry within such mobile wireless devices often account for a significant portion of the power consumed within these devices. Moreover, in some conventional communication systems, transmitters and/or receivers are often power inefficient in comparison to other blocks of the portable communication devices. Accordingly, these transmitters and/or receivers have a significant impact on battery life for these mobile wireless devices.
Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of skill in the art, through comparison of such systems with the present invention as set forth in the remainder of the present application with reference to the drawings.
BRIEF SUMMARY OF THE INVENTION
A system and/or method for an integrated leaky wave antenna-based transmitter and on-chip power distribution, substantially as shown in and/or described in connection with at least one of the figures, as set forth more completely in the claims.
Various advantages, aspects and novel features of the present invention, as well as details of an illustrated embodiment thereof, will be more fully understood from the following description and drawings.



BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 is a block diagram of an exemplary wireless system with integrated leaky wave antenna transmission and power distribution, which may be utilized in accordance with an embodiment of the invention.
FIG. 2 is a block diagram illustrating an exemplary leaky wave antenna, in accordance with an embodiment of the invention.
FIG. 3 is a block diagram illustrating a plan view of exemplary partially reflective surfaces, in accordance with an embodiment of the invention.
FIG. 4 is a block diagram illustrating an exemplary phase dependence of a leaky wave antenna, in accordance with an embodiment of the invention.
FIG. 5 is a block diagram illustrating exemplary in-phase and out-of-phase beam shapes for a leaky wave antenna, in accordance with an embodiment of the invention.
FIG. 6 is a block diagram illustrating a leaky wave antenna with variable input impedance feed points, in accordance with an embodiment of the invention.
FIG. 7A is a block diagram of exemplary leaky wave antenna transmission and on-chip power distribution, in accordance with an embodiment of the invention.
FIG. 7B is a block diagram illustrating a cross-sectional view of coplanar and microstrip transmission lines, in accordance with an embodiment of the invention.
FIG. 8 is a block diagram illustrating exemplary steps for an integrated leaky wave antenna-based transmitter and on-chip power distribution, in accordance with an embodiment of the invention.



DETAILED DESCRIPTION OF THE INVENTION
Certain aspects of the invention may be found in a method and system for an integrated leaky wave antenna-based transmitter and on-chip power distribution. Exemplary aspects of the invention may comprise supplying one or more bias voltages and/or ground to a chip comprising a plurality of power amplifiers utilizing bias voltage and/or ground lines, respectively. Each of the plurality of power amplifiers is communicatively coupled to one or more leaky wave antennas. The one or more leaky wave antennas are integrated within the bias voltage and/or ground lines. Wireless signals may be transmitted utilizing the leaky wave antennas integrated in the bias voltage and ground lines in the chip. Radio frequency (RF) signals may be transmitted via the plurality of leaky wave antennas. The RF signals may comprise 60 GHz signals and the leaky wave antennas may comprise microstrip waveguides. A cavity length of the leaky wave antennas may be defined by a spacing between conductive lines in the microstrip waveguides. The leaky wave antennas may comprise coplanar waveguides where a cavity length of the leaky wave antennas may be defined by a spacing between conductive lines in the coplanar waveguides. The leaky wave antennas may be configured to transmit the wireless signals at a desired angle from a surface of the chip. Signals may be amplified using the plurality of power amplifiers. A gain of the plurality power amplifiers may be configured for a desired transmitted output power.
FIG. 1 is a block diagram of an exemplary wireless system with integrated leaky wave antenna transmission and power distribution, which may be utilized in accordance with an embodiment of the invention. Referring to FIG. 1, the wireless device 150 may comprise an antenna 151, a transceiver 152, a baseband processor 154, a processor 156, a system memory 158, a logic block 160, a chip 162, leaky wave antennas 164A, 164B, and 164C an external headset port 166, and a package 167. The wireless device 150 may also comprise an analog microphone 168, integrated hands-free (IHF) stereo speakers 170, a printed circuit board 171, a hearing aid compatible (HAC) coil 174, a dual digital microphone 176, a vibration transducer 178, a keypad and/or touchscreen 180, and a display 182.
The transceiver 152 may comprise suitable logic, circuitry, interface(s), and/or code that may be enabled to modulate and upconvert baseband signals to RF signals for transmission by one or more antennas, which may be represented generically by the antenna 151. The transceiver 152 may also be enabled to downconvert and demodulate received RF signals to baseband signals. The RF signals may be received by one or more antennas, which may be represented generically by the antenna 151, or the leaky wave antennas 164A and 164B. Different wireless systems may use different antennas for transmission and reception. The transceiver 152 may be enabled to execute other functions, for example, filtering the baseband and/or RF signals, and/or amplifying the baseband and/or RF signals. Although a single transceiver 152 is shown, the invention is not so limited. Accordingly, the transceiver 152 may be implemented as a separate transmitter and a separate receiver. In addition, there may be a plurality of transceivers, transmitters and/or receivers. In this regard, the plurality of transceivers, transmitters and/or receivers may enable the wireless device 150 to handle a plurality of wireless protocols and/or standards including cellular, WLAN and PAN. Wireless technologies handled by the wireless device 150 may comprise GSM, CDMA, CDMA2000, WCDMA, GMS, GPRS, EDGE, WIMAX, WLAN, 3GPP, UMTS, BLUETOOTH, and ZigBee, for example.
The baseband processor 154 may comprise suitable logic, circuitry, interface(s), and/or code that may be enabled to process baseband signals for transmission via the transceiver 152 and/or the baseband signals received from the transceiver 152. The processor 156 may be any suitable processor or controller such as a CPU, DSP, ARM, or any type of integrated circuit processor. The processor 156 may comprise suitable logic, circuitry, and/or code that may be enabled to control the operations of the transceiver 152 and/or the baseband processor 154. For example, the processor 156 may be utilized to update and/or modify programmable parameters and/or values in a plurality of components, devices, and/or processing elements in the transceiver 152 and/or the baseband processor 154. At least a portion of the programmable parameters may be stored in the system memory 158.
Control and/or data information, which may comprise the programmable parameters, may be transferred from other portions of the wireless device 150, not shown in FIG. 1, to the processor 156. Similarly, the processor 156 may be enabled to transfer control and/or data information, which may include the programmable parameters, to other portions of the wireless device 150, not shown in FIG. 1, which may be part of the wireless device 150.
The processor 156 may utilize the received control and/or data information, which may comprise the programmable parameters, to determine an operating mode of the transceiver 152. For example, the processor 156 may be utilized to select a specific frequency for a local oscillator, a specific gain for a variable gain amplifier, configure the local oscillator and/or configure the variable gain amplifier for operation in accordance with various embodiments of the invention. Moreover, the specific frequency selected and/or parameters needed to calculate the specific frequency, and/or the specific gain value and/or the parameters, which may be utilized to calculate the specific gain, may be stored in the system memory 158 via the processor 156, for example. The information stored in system memory 158 may be transferred to the transceiver 152 from the system memory 158 via the processor 156.
The system memory 158 may comprise suitable logic, circuitry, interface(s), and/or code that may be enabled to store a plurality of control and/or data information, including parameters needed to calculate frequencies and/or gain, and/or the frequency value and/or gain value. The system memory 158 may store at least a portion of the programmable parameters that may be manipulated by the processor 156.
The logic block 160 may comprise suitable logic, circuitry, interface(s), and/or code that may enable controlling of various functionalities of the wireless device 150. For example, the logic block 160 may comprise one or more state machines that may generate signals to control the transceiver 152 and/or the baseband processor 154. The logic block 160 may also comprise registers that may hold data for controlling, for example, the transceiver 152 and/or the baseband processor 154. The logic block 160 may also generate and/or store status information that may be read by, for example, the processor 156. Amplifier gains and/or filtering characteristics, for example, may be controlled by the logic block 160.
The BT radio/processor 163 may comprise suitable circuitry, logic, interface(s), and/or code that may enable transmission and reception of Bluetooth signals. The BT radio/processor 163 may enable processing and/or handling of BT baseband signals. In this regard, the BT radio/processor 163 may process or handle BT signals received and/or BT signals transmitted via a wireless communication medium. The BT radio/processor 163 may also provide control and/or feedback information to/from the baseband processor 154 and/or the processor 156, based on information from the processed BT signals. The BT radio/processor 163 may communicate information and/or data from the processed BT signals to the processor 156 and/or to the system memory 158. Moreover, the BT radio/processor 163 may receive information from the processor 156 and/or the system memory 158, which may be processed and transmitted via the wireless communication medium a Bluetooth headset, for example
The CODEC 172 may comprise suitable circuitry, logic, interface(s), and/or code that may process audio signals received from and/or communicated to input/output devices. The input devices may be within or communicatively coupled to the wireless device 150, and may comprise the analog microphone 168, the stereo speakers 170, the hearing aid compatible (HAC) coil 174, the dual digital microphone 176, and the vibration transducer 178, for example. The CODEC 172 may be operable to up-convert and/or down-convert signal frequencies to desired frequencies for processing and/or transmission via an output device. The CODEC 172 may enable utilizing a plurality of digital audio inputs, such as 16 or 18-bit inputs, for example. The CODEC 172 may also enable utilizing a plurality of data sampling rate inputs. For example, the CODEC 172 may accept digital audio signals at sampling rates such as 8 kHz, 11.025 kHz, 12 kHz, 16 kHz, 22.05 kHz, 24 kHz, 32 kHz, 44.1 kHz, and/or 48 kHz. The CODEC 172 may also support mixing of a plurality of audio sources. For example, the CODEC 172 may support audio sources such as general audio, polyphonic ringer, I2S FM audio, vibration driving signals, and voice. In this regard, the general audio and polyphonic ringer sources may support the plurality of sampling rates that the audio CODEC 172 is enabled to accept, while the voice source may support a portion of the plurality of sampling rates, such as 8 kHz and 16 kHz, for example.
The chip 162 may comprise an integrated circuit with multiple functional blocks integrated within, such as the transceiver 152, the processor 156, the baseband processor 154, the BT radio/processor 163, the CODEC 172, and the leaky wave antenna 164A. The number of functional blocks integrated in the chip 162 is not limited to the number shown in FIG. 1. Accordingly, any number of blocks may be integrated on the chip 162 depending on chip space and wireless device 150 requirements, for example.
The leaky wave antennas 164A, 164B, and 164C may comprise a resonant cavity with a highly reflective surface and a lower reflectivity surface, and may be integrated in and/or on the chip 162, the package 167, and/or the printed circuit board 171. The lower reflectivity surface may allow the resonant mode to “leak” out of the cavity. The lower reflectivity surface of the leaky wave antennas 164A, 164B, and 164C may be configured with slots in a metal surface, or a pattern of metal patches, as described further in FIGS. 2 and 3. The physical dimensions of the leaky wave antennas 164A, 164B, and 164C may be configured to optimize bandwidth of transmission and/or the beam pattern radiated. In another embodiment of the invention, the leaky wave antenna 164B may be integrated in and/or on the package 167, and the leaky wave antenna 164C may be integrated in and/or on the printed circuit board 171 to which the chip 162 may be affixed. In this manner, the dimensions of the leaky wave antennas 164B and 164C may not be limited by the size of the chip 162.
In an exemplary embodiment of the invention, the leaky wave antennas 164A may comprise a plurality of leaky wave antennas integrated in and/or on the chip 162, and may be integrated into power traces in and/or on the chip 162. In this manner, the power traces may be utilized to transmit RF signals and provide power to various regions of the chip 162. Accordingly, separate signal lines may not be required to carry signals to be transmitted by a separate antenna.
The external headset port 166 may comprise a physical connection for an external headset to be communicatively coupled to the wireless device 150. The analog microphone 168 may comprise suitable circuitry, logic, interface(s), and/or code that may detect sound waves and convert them to electrical signals via a piezoelectric effect, for example. The electrical signals generated by the analog microphone 168 may comprise analog signals that may require analog to digital conversion before processing.
The package 167 may comprise a ceramic package, a printed circuit board, or other support structure for the chip 162 and other components of the wireless device 150. In this regard, the chip 162 may be bonded to the package 167. The package 167 may comprise insulating and conductive material, for example, and may provide isolation between electrical components mounted on the package 167.
The stereo speakers 170 may comprise a pair of speakers that may be operable to generate audio signals from electrical signals received from the CODEC 172. The HAG coil 174 may comprise suitable circuitry, logic, and/or code that may enable communication between the wireless device 150 and a T-coil in a hearing aid, for example. In this manner, electrical audio signals may be communicated to a user that utilizes a hearing aid, without the need for generating sound signals via a speaker, such as the stereo speakers 170, and converting the generated sound signals back to electrical signals in a hearing aid, and subsequently back into amplified sound signals in the user's ear, for example.
The dual digital microphone 176 may comprise suitable circuitry, logic, interface(s), and/or code that may be operable to detect sound waves and convert them to electrical signals. The electrical signals generated by the dual digital microphone 176 may comprise digital signals, and thus may not require analog to digital conversion prior to digital processing in the CODEC 172. The dual digital microphone 176 may enable beamforming capabilities, for example.
The vibration transducer 178 may comprise suitable circuitry, logic, interface(s), and/or code that may enable notification of an incoming call, alerts and/or message to the wireless device 150 without the use of sound. The vibration transducer may generate vibrations that may be in synch with, for example, audio signals such as speech or music.
In operation, control and/or data information, which may comprise the programmable parameters, may be transferred from other portions of the wireless device 150, not shown in FIG. 1, to the processor 156. Similarly, the processor 156 may be enabled to transfer control and/or data information, which may include the programmable parameters, to other portions of the wireless device 150, not shown in FIG. 1, which may be part of the wireless device 150.
The processor 156 may utilize the received control and/or data information, which may comprise the programmable parameters, to determine an operating mode of the transceiver 152. For example, the processor 156 may be utilized to select a specific frequency for a local oscillator, a specific gain for a variable gain amplifier, configure the local oscillator and/or configure the variable gain amplifier for operation in accordance with various embodiments of the invention. Moreover, the specific frequency selected and/or parameters needed to calculate the specific frequency, and/or the specific gain value and/or the parameters, which may be utilized to calculate the specific gain, may be stored in the system memory 158 via the processor 156, for example. The information stored in system memory 158 may be transferred to the transceiver 152 from the system memory 158 via the processor 156.
The CODEC 172 in the wireless device 150 may communicate with the processor 156 in order to transfer audio data and control signals. Control registers for the CODEC 172 may reside within the processor 156. The processor 156 may exchange audio signals and control information via the system memory 158. The CODEC 172 may up-convert and/or down-convert the frequencies of multiple audio sources for processing at a desired sampling rate.
The leaky wave antennas 164A may be integrated in power traces in and/or on the chip 162, thereby providing a plurality of transmission sources on the chip 162 as well as providing power and ground lines. By integrating a plurality of leaky wave antennas across a chip with separate driver circuitry for each antenna, heat may be dissipated throughout the chip thereby increasing power transmission efficiency of the wireless device 150.
FIG. 2 is a block diagram illustrating an exemplary leaky wave antenna, in accordance with an embodiment of the invention. Referring to FIG. 2, there is shown the leaky wave antennas 164A, 164B, and/or 164C comprising a partially reflective surface 201A, a reflective surface 201B, and a feed point 203. The space between the partially reflective surface 201A and the reflective surface 201B may be filled with dielectric material, for example, and the height, h, between the partially reflective surface 201A and the reflective surface 201B may be utilized to configure the frequency of transmission of the leaky wave antenna 164A, 164B, and/or 164C.
The feed point 203 may comprise a input terminal for applying an input voltage to the leaky wave antenna 164A, 164B, and/or 164C. The invention is not limited to a single feed point 203, as there may be any amount of feed points for different phases of signal, for example, to be applied to the leaky wave antenna 164A, 164B, and/or 164C.
In an embodiment of the invention, the height, h, may be one-half the wavelength of the desired transmitted mode from the leaky wave antenna 164A, 164B, and/or 164C. In this manner, the phase of an electromagnetic mode that traverses the cavity twice may be coherent with the input signal at the feed point 203, thereby configuring a resonant cavity known as a Fabry-Perot cavity. The magnitude of the resonant mode may decay exponentially in the lateral direction from the feed point 203, thereby reducing or eliminating the need for confinement structures to the sides of the leaky wave antenna 164A, 164B, and/or 164C. The input impedance of the leaky wave antenna 164A, 164B, and/or 164C may be configured by the vertical placement of the feed point 203, as described further in FIG. 6.
In operation, a signal to be transmitted via a power amplifier may be communicated to the feed point 203 of the leaky wave antennas 164A, 164B, and/or 164C with a frequency f. The cavity height, h, may be configured to correlate to one half the wavelength of a harmonic of the signal of frequency f. The signal may traverse the height of the cavity and may be reflected by the partially reflective surface 201A, and then traverse the height back to the reflective surface 201B. Since the wave will have traveled a distance corresponding to a full wavelength, constructive interference may result and a resonant mode may thereby be established.
Leaky wave antennas may enable the configuration of high gain antennas without the need for a large array of antennas which require a complex feed network and suffer from loss due to feed lines. The leaky wave antennas 164A may be integrated in power traces in and/or on the chip 162, thereby providing a plurality of transmission sources on the chip 162 as well as providing power and ground lines. By integrating a plurality of leaky wave antennas across a chip with separate driver circuitry for each antenna, heat may be dissipated throughout the chip thereby increasing power transmission efficiency of the wireless device 150.
FIG. 3 is a block diagram illustrating a plan view of exemplary partially reflective surfaces, in accordance with an embodiment of the invention. Referring to FIG. 3, there is shown a partially reflective surface 300 comprising periodic slots in a metal surface, and a partially reflective surface 320 comprising periodic metal patches. The partially reflective surfaces 300/320 may comprise different embodiments of the partially reflective surface 201A described with respect to FIG. 2.
The spacing, dimensions, shape, and orientation of the slots and/or patches in the partially reflective surfaces 300/320 may be utilized to configure the bandwidth, and thus Q-factor, of the resonant cavity defined by the partially reflective surfaces 300/320 and a reflective surface, such as the reflective surface 201B, described with respect to FIG. 2. The partially reflective surfaces 300/320 may thus comprise frequency selective surfaces due to the narrow bandwidth of signals that may leak out of the structure as configured by the slots and/or patches.
The spacing between the patches and/or slots may be related to wavelength of the signal transmitted and/or received, which may be somewhat similar to beamforming with multiple antennas. The length of the slots and/or patches may be several times larger than the wavelength of the transmitted and/or received signal or less, for example, since the leakage from the slots and/or regions surround the patches may add up, similar to beamforming with multiple antennas.
In an embodiment of the invention, the slots/patches may be configured via micro-electromechanical system (MEMS) switches to tune the Q of the resonant cavity.
FIG. 4 is a block diagram illustrating an exemplary phase dependence of a leaky wave antenna, in accordance with an embodiment of the invention. Referring to FIG. 4, there is shown a leaky wave antenna comprising the partially reflective surface 201A, the reflective surface 201B, and the feed point 203. In-phase condition 400 illustrates the relative beam shape transmitted by the leaky wave antenna 164A, 164B, and/or 164C when the frequency of the signal communicated to the feed point 203 matches that of the resonant cavity as defined by the cavity height, h, and the dielectric constant of the material between the reflective surfaces.
Similarly, out-of-phase condition 420 illustrates the relative beam shape transmitted by the leaky wave antenna 164A, 164B, and/or 164C when the frequency of the signal communicated to the feed point 203 does not match that of the resonant cavity. The resulting beam shape may be conical, as opposed to a single main vertical node. These are illustrated further with respect to FIG. 5. The leaky wave antennas 164A may be integrated in power traces in and/or on the chip 162, thereby providing a plurality of transmission sources on the chip 162 as well as providing power and ground lines. By configuring the leaky wave antennas for in-phase and out-of-phase conditions, signals may be directed out of the chip 162 in desired directions.
FIG. 5 is a block diagram illustrating exemplary in-phase and out-of-phase beam shapes for a leaky wave antenna, in accordance with an embodiment of the invention. Referring to FIG. 5, there is shown a plot 500 of transmitted signal beam shape versus angle for the in-phase and out-of-phase conditions for a leaky wave antenna.
The In-phase curve in the plot 500 may correlate to the case where the frequency of the signal communicated to a leaky wave antenna matches the resonant frequency of the cavity. In this manner, a single vertical main node may result. In instances where the frequency of the signal at the feed point is not at the resonant frequency, a double, or conical-shaped node may be generated as shown by the Out-of-phase curve in the plot 500. By configuring the leaky wave antennas for in-phase and out-of-phase conditions, signals may be directed out of the chip 162 in desired directions.
FIG. 6 is a block diagram illustrating a leaky wave antenna with variable input impedance feed points, in accordance with an embodiment of the invention. Referring to FIG. 6, there is shown a leaky wave antenna 600 comprising the partially reflective surface 201A and the reflective surface 201B. There is also shown feed points 601A-601C. The feed points 601A-601C may be located at different positions along the height, h, of the cavity thereby configuring different impedance points for the leaky wave antenna.
In this manner, a leaky wave antenna may be utilized to couple to a plurality of power amplifiers with varying output impedances. Similarly, by integrating leaky wave antennas in power and ground traces, the impedance of the leaky wave antenna may be matched to the power amplifier communicating a signal to be transmitted.
FIG. 7A is a block diagram of exemplary leaky wave antenna transmission and on-chip power distribution, in accordance with an embodiment of the invention. Referring to FIG. 7A, there is shown on-chip leaky wave antenna transmission and power distribution system 700 comprising a VDD line 701A, a ground line 701B, leaky wave antennas 703A-703D, and power amplifiers (PAs) 705A-705D. There is also shown the transceiver 152, described with respect to FIG. 1.
The VDD line 701A and the ground line 701B may comprise metal, or other conductive material, traces integrated in and/or on a chip, such as the chip 162. The VDD line 701A and the ground line 701B may provide power to the chip 162 and may also be utilized to transmit RF signals by integrating leaky wave antennas in the conductive traces.
The leaky wave antennas 703A-703D may be substantially similar to the leaky wave antennas 164A, 164B, and 164C, and may be integrated in and/or on the VDD line 701A and the ground line 701B. The leaky wave antennas 703A-703D may receive input signals to be transmitted from the PAs 705A-705D.
The PAs 705A-705D may comprise suitable circuitry, logic, interfaces, and/or code that may be operable to amplify signals received from other circuitry in the transceiver 152. The PAs 705A-705D may be communicatively coupled to the leaky wave antennas 703A-703D, and may receive signals to be amplified from other circuitry in the transceiver 152, for example.
In operation, the PAs 705A-705D may amplify signals received from the transceiver 152, which may then be communicated to the leaky wave antennas 703A-703D. By integrating the leaky wave antennas 703A-703D into the VDD line 701A and the ground line 701B, power may be supplied to the chip 162 and signals may be transmitted from the chip 162 from a plurality of locations, thereby distributing wireless transmission across the chip 162. In this manner, power requirements of the PAs 705A-705D may be reduced compared to a single power amplifier for the desired power level. In addition, heat generated in amplifying signals to be transmitted may be more uniformly distributed on the chip 162 by transmitting signals from a plurality of locations via the leaky wave antennas 703A-703D.
The leaky wave antennas 703A-703D may comprise microstrip and/or coplanar waveguides formed by the VDD line 701A and the ground line 701B. The leaky wave antennas 703A-703D may be distributed in a plurality of locations along the VDD line 701A and the ground line 701B.
The invention is not limited to a single bias voltage and ground line. Accordingly, any number of bias voltage lines may be incorporated, depending on desired voltage levels and chip space requirements, for example. Thus, leaky wave antennas may be integrated into two bias voltage lines or between signal lines and a ground line.
FIG. 7B is a block diagram illustrating a cross-sectional view of coplanar and microstrip transmission lines, in accordance with an embodiment of the invention. Referring to FIG. 7B, there is shown a microstrip transmission line 720 and a coplanar transmission line 730, either of which may be used in the VDD line 701A and/or the ground line 701B described with respect to FIG. 7A. The microstrip transmission line 720 may comprise signal conductive lines 723, a ground plane 725, an insulating layer 727 and a substrate 729. The coplanar transmission line 730 may comprise signal conductive lines 731 and 733, the insulating layer 727, and the substrate 729.
The signal conductive lines 723, 731, and 733 may comprise metal traces deposited in and/or on the insulating layer 727. In another embodiment of the invention, the signal conductive lines 723, 731, and 733 may comprise poly-silicon or other conductive material. The separation and the voltage potential between the signal conductive line 723 and the ground plane 725 may determine the electric field generated therein. In addition, the dielectric constant of the insulating layer 727 may also determine the electric field between the signal conductive line 723 and the ground plane 725.
The insulating layer 727 may comprise SiO2 or other insulating material that may provide a high resistance layer between the signal conductive line 723 and the ground plane 725. In addition, the electric field between the signal conductive line 723 and the ground plane 725 is dependent on the dielectric constant of the insulating layer 727.
The coplanar transmission line 730 may comprise the signal conductive lines 731 and 733 and the insulating layer 727. The thickness and the dielectric constant of the insulating layer 727 may determine the electric field strength generated by the propagating signal. The resonant cavity thickness of a leaky wave antenna may be dependent on the spacing between the signal conductive line 723 and the ground plane 725, or the signal conductive lines 731 and 733.
The substrate 729 may comprise a semiconductor or insulator material that may provide mechanical support for the microstrip transmission line 720, the coplanar transmission line 730, and other devices that may be integrated within. In another embodiment of the invention, the substrate 729 may comprise Si, GaAs, sapphire, InP, GaO, ZnO, CdTe, CdZnTe and/or Al2O3, for example, or any other substrate material that may be suitable for integrating microstrip structures.
In operation, a bias voltage may be applied across the signal conductive line 723 and the ground plane 725, and/or the signal conductive lines 731 and 733. The thickness of a leaky wave antenna resonant cavity may be dependent on the distance between the microstrip transmission line 720 and/or the coplanar transmission line 730.
In addition to DC bias and ground, a signal to be transmitted, such as a 60 GHz RF signal, may be communicated to the signal conductive lines 723, 731, and 733, and the ground plane 725. In this manner, the power line traces on the chip 162 may transmit signals as well as supply DC bias.
FIG. 8 is a block diagram illustrating exemplary steps for an integrated leaky wave antenna-based transmitter and on-chip power distribution, in accordance with an embodiment of the invention. Referring to FIG. 8, in step 803 after start step 801, bias voltage and ground may be applied to supply and ground lines, and the power amplifiers may be configured for a desired gain level. In step 805, signals to be transmitted may be communicated to a plurality of leaky wave antennas. In step 807, the leaky wave antennas may communicate the signals. In step 809, if the wireless device 150 is to be powered down, the exemplary steps may proceed to end step 811. In instances when the wireless device 150 is not to be powered down, the exemplary steps may proceed to step 803 to configure the power amplifiers at desired gain levels.
In an embodiment of the invention, a method and system are disclosed for supplying one or more bias voltages and/or ground to a chip comprising a plurality of power amplifiers (PAs) 705A-705D. The power amplifiers (PAs) 705A-705D may be communicatively coupled to leaky wave antennas (LWAs) 164A, 600, and/or 703A-703D. The leaky wave antennas 164A, 600, and/or 703A-703D may be integrated within the bias voltage and/or ground lines 701A, 701B, 723, 725, 731, and/or 733, respectively. Wireless signals may be transmitted utilizing the leaky wave antennas 164A, 600, and/or 703A-703D integrated in the bias voltage and ground lines 701A, 701B, 723, 725, 731, and/or 733 in the chip 162. Radio frequency (RF) signals may be transmitted via the plurality of leaky wave antennas 164A, 600, and/or 703A-703D. The RF signals may comprise 60 GHz signals and the LWAs 164A, 600, and/or 703A-703D may comprise microstrip waveguides 720. A cavity length of the leaky wave antennas 164A, 600, and/or 703A-703D may be dependent on a spacing between conductive lines 723 and 726 in the microstrip waveguides 720.
The leaky wave antennas 164A, 600, and/or 703A-703D may comprise coplanar waveguides 730 where a cavity length of the leaky wave antennas 164A, 600, and/or 703A-703D may be dependent on a spacing between conductive lines 731 and 733 in the coplanar waveguides 730. The LWAs 164A, 600, and/or 703A-703D may be configured to transmit the wireless signals at a desired angle from a surface of the chip 162. Signals may be amplified for the transmitting using the plurality of power amplifiers 705A-705D. A gain of the plurality power amplifiers 705A-705D may be configured for a desired transmitted output power.
Another embodiment of the invention may provide a machine and/or computer readable storage and/or medium, having stored thereon, a machine code and/or a computer program having at least one code section executable by a machine and/or a computer, thereby causing the machine and/or computer to perform the steps as described herein for an integrated leaky wave antenna-based transmitter and on-chip power distribution.
Accordingly, aspects of the invention may be realized in hardware, software, firmware or a combination thereof. The invention may be realized in a centralized fashion in at least one computer system or in a distributed fashion where different elements are spread across several interconnected computer systems. Any kind of computer system or other apparatus adapted for carrying out the methods described herein is suited. A typical combination of hardware, software and firmware may be a general-purpose computer system with a computer program that, when being loaded and executed, controls the computer system such that it carries out the methods described herein.
One embodiment of the present invention may be implemented as a board level product, as a single chip, application specific integrated circuit (ASIC), or with varying levels integrated on a single chip with other portions of the system as separate components. The degree of integration of the system will primarily be determined by speed and cost considerations. Because of the sophisticated nature of modern processors, it is possible to utilize a commercially available processor, which may be implemented external to an ASIC implementation of the present system. Alternatively, if the processor is available as an ASIC core or logic block, then the commercially available processor may be implemented as part of an ASIC device with various functions implemented as firmware.
The present invention may also be embedded in a computer program product, which comprises all the features enabling the implementation of the methods described herein, and which when loaded in a computer system is able to carry out these methods. Computer program in the present context may mean, for example, any expression, in any language, code or notation, of a set of instructions intended to cause a system having an information processing capability to perform a particular function either directly or after either or both of the following: a) conversion to another language, code or notation; b) reproduction in a different material form. However, other meanings of computer program within the understanding of those skilled in the art are also contemplated by the present invention.
While the invention has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the present invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present invention without departing from its scope. Therefore, it is intended that the present invention not be limited to the particular embodiments disclosed, but that the present invention will include all embodiments falling within the scope of the appended claims.

## Claims

1. A method for communication, the method comprising:
performing using one or more circuits in a wireless device, said one or more circuits comprising a plurality of power amplifiers on a chip, wherein each of said plurality of power amplifiers is communicatively coupled to one or more leaky wave antennas, said one or more leaky wave antennas being integrated in power supply voltage and ground lines to said chip:
supplying one or more power supply voltages and ground to said chip utilizing said power supply voltage and ground lines, respectively; and
transmitting wireless signals utilizing said leaky wave antennas integrated in said power supply voltage and ground lines in said chip.

2. The method according to claim 1, comprising transmitting radio frequency (RF) signals via said plurality of leaky wave antennas.

3. The method according to claim 2, wherein said RF signals comprise 60 GHz signals.

4. The method according to claim 1, wherein said leaky wave antennas comprise microstrip waveguides.

5. The method according to claim 4, wherein a cavity length of said leaky wave antennas is dependent on a spacing between conductive lines in said microstrip waveguides.

6. The method according to claim 1, wherein said leaky wave antennas comprise coplanar waveguides.

7. The method according to claim 6, wherein a cavity length of said leaky wave antennas is dependent on a spacing between conductive lines in said coplanar waveguides.

8. The method according to claim 1, comprising configuring said leaky wave antennas to transmit said wireless signals at a desired angle from a surface of said chip.

9. The method according to claim 1, comprising amplifying signals for said transmitting using said plurality of power amplifiers.

10. The method according to claim 1, comprising configuring a gain of said plurality power amplifiers for a desired transmitted output power.

11. A system for enabling communication, the system comprising:
one or more circuits in a wireless device, said one or more circuits comprising a plurality of power amplifiers on a chip, wherein each of said power amplifiers is communicatively coupled to one or more leaky wave antennas, said one or more leaky wave antennas being integrated in power supply voltage and ground lines to said chip, said one or more circuits being operable to:
supply one or more power supply voltages and ground to said chip utilizing said power supply voltage and ground lines, respectively; and
transmit wireless signals utilizing said leaky wave antennas integrated in said power supply voltage and ground lines in said chip.

12. The system according to claim 11, wherein said one or more circuits are operable to transmitting radio frequency (RF) signals via said plurality of leaky wave antennas.

13. The system according to claim 12, wherein said one or more circuits are operable to wherein said RF signals comprise 60 GHz signals.

14. The system according to claim 11, wherein said leaky wave antennas comprise microstrip waveguides.

15. The system according to claim 14, wherein a cavity length of said leaky wave antennas is dependent on a spacing between conductive lines in said microstrip waveguides.

16. The system according to claim 11, wherein said leaky wave antennas comprise coplanar waveguides.

17. The system according to claim 16, wherein a cavity length of said leaky wave antennas is dependent on a spacing between conductive lines in said coplanar waveguides.

18. The system according to claim 11, wherein said one or more circuits are operable to configure said leaky wave antennas to transmit said wireless signals at a desired angle from a surface of said chip.

19. The system according to claim 11, wherein said one or more circuits are operable to amplify signals for said transmitting using said plurality of power amplifiers.

20. The system according to claim 11, wherein a gain of said plurality power amplifiers is configured for a desired transmitted output power.