Patent Publication Number: US-11646487-B2

Title: Dual-antenna system for a video-recording doorbell, and associated devices and systems

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application is a continuation of and claims priority to U.S. patent application Ser. No. 17/122,449, filed Dec. 15, 2020, the entire disclosure of which is hereby incorporated by reference. 
    
    
     BACKGROUND 
     In some electronic devices, an antenna system using multiple antennas may be implemented for wireless communication. However, isolation between the multiple antennas may be limited by the surrounding hardware of the electronic device, particularly for devices with a small form factor. Antenna isolation is a measure of a ratio between the power incident upon a first antenna and the power delivered to a second antenna. Good isolation, therefore, results in uncorrelated transmission and reception of electric signals on both antennas. Poor isolation between antennas can significantly reduce performance and efficiency of the antennas. Further degradation of the performance and efficiency of the antennas may result from proximity of the antennas to certain components (e.g., battery, metal plate), which can interfere with the electric signals on the antennas. 
     SUMMARY 
     This document describes a dual-antenna system for a video-recording doorbell, and associated devices and systems. The described antenna system may be implemented on an elongated printed circuit board and can be used for wideband and ultra-wideband applications. For low-cost devices, the dual-antenna system may implement diversity antennas by including first and second substantially orthogonal antennas connected to a chipset configured for single-input single-output (SISO) functionality. Depending on the propagation condition of each antenna and a position of the device (e.g., video-recording doorbell) relative to an access point, the device can select to use the antenna with the more-stable link. Although some devices use a decoupling structure between the two antennas to increase the antenna isolation, the dual-antenna system described herein achieves high isolation without a decoupling structure between the first and second antennas. Further, the dual-antenna system achieves high isolation while in proximity to a battery (e.g., a battery within a housing of a battery-powered, video-recording doorbell) and a metal plate (e.g., mounted to a rear side of the video-recording doorbell) for mounting the device to a wall or other structure. 
     In some aspects, a dual-antenna system for a video-recording doorbell is disclosed. The dual-antenna system may include a printed circuit board (PCB), a first antenna, and a second antenna. The PCB has an elongated shape with one end having a mechanical switch for receiving user input to trigger a function. The first antenna is printed on the PCB at a first location proximate to the one end of the PCB. The first antenna has a first element and a second element. The first element has a first arm configured for tuning a first frequency, and the first arm is capacitively coupled to the second element. The second element includes a second arm configured for tuning a second frequency that is different than the first frequency. The second antenna is printed on the PCB at a second location proximate to the one end of the PCB. In addition, the second antenna includes a third arm configured for tuning the first frequency and a fourth arm configured for tuning the second frequency. The third arm includes a first portion positioned to overlap a battery of the video-recording doorbell and a second portion positioned to not overlap the battery. The fourth arm is positioned to overlap the battery. 
     In other aspects, an electronic device that may include a dual-antenna system is disclosed. The electronic device includes a housing, a user-control button, a camera, a battery, and the dual-antenna system. The housing may be generally obround in front view and includes a longitudinal axis intersecting first and second opposing ends of the housing. The camera is positioned proximate to the first end of the housing. The user-control button is positioned proximate to the second end of the housing. The battery is positioned within the housing between the first and second ends. The dual-antenna system is positioned proximate to the second end of the housing. The dual-antenna system includes a first antenna and a second antenna. The first antenna has a first element and a second element, with the first element having a first arm configured for tuning a first frequency and being capacitively coupled to the second element. The second element includes a second arm configured for tuning a second frequency that is different than the first frequency. The second antenna includes a third arm configured for tuning the first frequency and a fourth arm configured for tuning the second frequency. The third arm includes a first portion positioned to overlap the battery and a second portion positioned to not overlap the battery. The fourth arm is positioned to overlap the battery. Also, the first element of the first antenna is positioned between the second antenna and the second element of the first antenna. 
     This summary is provided to introduce simplified concepts concerning a dual-antenna system for a video-recording doorbell, which is further described below in the Detailed Description and Drawings. This summary is not intended to identify essential features of the claimed subject matter, nor is it intended for use in determining the scope of the claimed subject matter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The details of one or more aspects of a dual-antenna system for a video-recording doorbell, and associated devices and systems, are described in this document with reference to the following drawings. The same numbers are used throughout the drawings to reference like features and components. 
         FIG.  1    illustrates an example electronic device, and an exploded view of some components thereof, in which a dual-antenna system for a video-recording doorbell may be implemented. 
         FIG.  2    illustrates different subassemblies of the electronic device of  FIG.  1    in more detail. 
         FIG.  3    illustrates an enlarged view of a portion of the PCB including the dual-antenna system of  FIGS.  1  and  2    in more detail. 
         FIG.  4    illustrates a zoomed-in view of a surface of the PCB that faces the speaker module from  FIG.  1   . 
         FIG.  5    illustrates a sectional view of the PCB from  FIG.  4   , taken along line A-A, including the speaker module and the connectors. 
         FIG.  6    is a block diagram illustrating an example system that includes an example device, which can be implemented as any electronic device that implements aspects of the dual-antenna system as described with reference to the previous  FIGS.  1 - 5   . 
     
    
    
     DETAILED DESCRIPTION 
     Overview 
     This document describes a dual-antenna system for a video-recording doorbell, and associated devices and systems in which a dual-antenna system for a video-recording doorbell may be implemented. This dual-antenna system has high isolation (e.g., greater than 20 decibels (dB)) between multiple antennas at multiple bands (e.g., 2.4 GHz and 5 GHz bands). The dual-antenna system includes two antennas positioned proximate to the same end of the video-recording doorbell without a decoupling structure between the two antennas. Using the dual-antenna system described herein, a low-cost battery-powered device having a small form factor (e.g., a video-recording doorbell) can utilize antenna diversity to achieve dual band functionality using two antennas in close proximity without a decoupling structure between them. 
     While features and concepts of the described dual-antenna system for a video-recording doorbell can be implemented in any number of different environments, aspects are described in the context of the following examples. 
     Example Device 
       FIG.  1    illustrates an example electronic device  100  (e.g., a video-recording doorbell) and an exploded view  102  of some components thereof. The electronic device  100  may connect to a wireless network  104  (e.g., via a wireless router) and support a variety of functions, including capturing audio and/or video data (including images or streaming video), transmitting the captured data to online storage, storing the captured data to local memory, streaming audio (e.g., music, news, podcasts, sports), and interacting with a virtual assistant to perform tasks (e.g., search the internet, schedule events and alarms, control home automation, control internet-of-things (IoT) devices), and so on. 
     The electronic device  100  includes a housing formed by one or more housing members, including a front housing member  106  (e.g., a front cover) and a rear housing member  108  (e.g., a back component), and multiple printed circuit boards (PCBs) including at least PCB  110  (e.g., a main logic board), a camera board  112 , and an infrared (IR) board  114 . Additional PCBs may also be used. The PCBs may include various integrated circuit (IC) components, including system-on-chip (SoC) IC devices, processors, and IC components for light-emitting diode(s) (LEDs), microphone(s), or sensors for detecting input such as touch-input, a button-press, or a voice command. The electronic device  100  also includes a dual-antenna system  116 , a camera subassembly  118  (e.g., a camera), a battery  120 , a button  122 , a speaker module  124 , and a wallplate  126 . In addition, the electronic device  100  may include a thermal-control system, which may include one or more heat spreaders (e.g., heat spreaders  128 ,  130 , and  132 ) and one or more thermal interface materials (TIMs) (e.g., TIMs  134 ,  136 , and  138 ) such as thermal gel, thermal paste, thermal adhesive, thermal tape) with high thermal conductivities. In some aspects, the heat spreader  128  may double as an electromagnetic interference (EMI) shield for SoC IC devices mounted on the PCB  110 . 
     The housing members  106  and  108  may include a plastic material and be formed, for example, using plastic-injection molding techniques. The housing members  106  and  108  may include any suitable geometry, including the example geometry illustrated in  FIG.  1   . For instance, the front housing member  106  and the rear housing member  108  may form complementary portions of a shell (e.g., a hollow, substantially obround shell) that fit together (e.g., snap together) to form a cavity to house various components of the electronic device  100 . In some implementations, the front housing member  106  and/or the rear housing member  108  may include multiple parts assembled together. The front housing member  106  may also include an aperture or transparent region that is aligned with the camera subassembly  118  to enable the camera subassembly  118  to view through the aperture or transparent region and capture images or video of a scene. 
     The button  122  include any suitable button (e.g., a mechanical button to open or close a switch, a capacitive sensor to detect user touch) usable to initiate a function. For example, actuation of the button  122  may initiate a function, including a ringing of an audible doorbell, transmission of an electronic notification to a smartphone of the doorbell&#39;s owner, initiation of the camera subassembly  118 , and so on. Any suitable function can be initiated by activating the button  122 . 
     The speaker module  124  may output audio waves toward a front and/or sides (e.g., lateral sides that are orthogonal to a front surface  140  of the front housing member  106 ) of the electronic device  100 . The speaker module  124  can enable a visitor (e.g., a user pressing the button  122 ) to listen to an audible message, including a recorded audio message or a real-time audio transmission from the doorbell&#39;s owner. 
     The battery  120  provides power to the electronic device  100  and enables the electronic device  100  to be wireless. Because the electronic device  100  is battery powered, the electronic device  100  can be mounted in any suitable location, without having to hardwire the electronic device  100  to an electric power source. For example, the electronic device  100  (e.g., video-recording doorbell) can be mounted on a user&#39;s house proximate to their front door without having to drill holes in the house to connect wires to a power source inside the house. 
     The PCBs (e.g., the PCB  110 , the camera board  112 , the IR board  114 ) may be formed, for example, from glass-reinforced epoxy material such as FR4. In some instances, the PCBs may include a single layer of electrically conductive traces and be a single-layer board. In other instances, the PCBs may be a multi-layer board that includes multiple layers of electrically conductive traces that are separated by layers of a dielectric material. 
     As described herein, the housing of the electronic device  100  includes an elongated shape (e.g., substantially obround in front view) having a longitudinal axis  142  intersecting first and second opposing ends of the housing. The camera subassembly  118  is positioned proximate to the first end (e.g., a camera-side end  144 ) of the electronic device  100 . The button  122  and the speaker module  124  are positioned proximate to the second end (e.g., a button-side end  146 ) of the housing. When the electronic device  100  is assembled, the battery  120  is positioned between the camera-side end  144  and the button-side end  146 . 
     The dual-antenna system  116  may be mounted on a PCB (e.g., the PCB  110 ). For example, the dual-antenna system  116  may include conductive trace (e.g., copper) forming multiple (e.g., two) antennas. As such, the antennas of the dual-antenna system  116  may be printed on the PCB  110 . The dual-antenna system  116  may be located proximate to the button-side end  146  of the electronic device  100 . Positioning the dual-antenna system  116  at the button-side end  146  reduces negative effects on antenna efficiency caused by the camera subassembly  118 . To reduce adverse effects of the wallplate  126  on the antenna performance and efficiency, the PCB  110  on which the dual-antenna system  116  resides is positioned proximate to the front housing member  106  such that the dual-antenna system  116  is positioned between the battery  120  and the front housing member  106 . Accordingly, the battery  120  is located between the PCB  110  and the rear housing member  108 , and the rear housing member  108  is positioned between the battery  120  and the wallplate  126 . Accordingly, the wallplate  126  can be mounted to a rear exterior surface  148  of the rear housing member  108 , where the rear exterior surface  148  is opposite the front surface  140  of the front housing member  106  when the rear housing member  108  is assembled to the front housing member  106 . 
       FIG.  2    illustrates different subassemblies of the electronic device  100  of  FIG.  1    in more detail. A first subassembly  200  includes the components of the electronic device  100  that are positioned between the battery  120  and the front housing member  106  (not shown in  FIG.  2   ), as well as components positioned at the camera-side end  144  of the electronic device  100 . For example, the first subassembly  200  includes at least the PCB  110 , the camera subassembly  118 , the camera board  112 , the IR board  114 , and the heat spreaders  128  and  130  (hidden under the PCB  110 ). In aspects, the PCB  110  includes an end, having a semi-elliptical shape, on which the dual-antenna system  116  is mounted. 
     A second subassembly  202  includes at least the rear housing member  108 , the battery  120 , and the speaker module  124 . A third subassembly  204  includes the wallplate  126 . The first, second, and third subassemblies  200 ,  202 , and  204 , respectively, are aligned horizontally in  FIG.  2    to indicate a relative positioning in a y-direction (e.g., a direction parallel to the longitudinal axis  142 ). To vertically align the first, second, and third subassemblies  200 ,  202 , and  204 , respectively, about the longitudinal axis  142 , the first subassembly  200  is placed in front of the second subassembly  202 , which is placed in front of the third subassembly  204 , such that the second and third subassemblies  202  and  204 , respectively, become hidden behind the first subassembly  200 . In this way, it can be seen that the dual-antenna system  116  is aligned with the speaker module  124 . 
     The dual-antenna system  116  includes a first antenna  206  and a second antenna  208 , which are approximately 90 degrees out of phase with one another, such that the two antennas are substantially orthogonal. This offset provides complimentary coverage and helps to provide pattern diversity and high isolation. The first and second antennas  206  and  208  are coplanar with the PCB  110  and are positioned, as a group, at the button-side end  146  of the electronic device  100 . As illustrated in the second subassembly  202 , the speaker module includes multiple electrical contacts  210 , which are configured to be electrically connected to the PCB  110 . Further detail of the dual-antenna system  116  is described below with respect to  FIG.  3   . 
       FIG.  3    illustrates an enlarged view  300  of a portion of the PCB  110  including the dual-antenna system  116  of  FIGS.  1  and  2    in more detail. In the illustrated example, the first antenna  206  and the second antenna  208  are radially distributed about a switch mechanism  302  mounted on the PCB  110  (e.g., at the button-side end  146  of the PCB  110 , which may have a semi-elliptical shape). The switch mechanism  302  includes a switch corresponding to a button (e.g., the button  122  on the front housing member  106  shown in  FIG.  1   ). The first antenna  206  may be positioned proximate to a longitudinal end  304  (e.g., tip) of the PCB  110 . In some aspects, the first antenna  206  may be intersected by a longitudinal axis  306  of the PCB  110 . When the electronic device  100  is assembled, the longitudinal axis  306  of the PCB  110  may be aligned with (e.g., substantially parallel to) a direction of the longitudinal axis  146  (shown in  FIG.  1   ) of the electronic device  100 . The second antenna  208  may be positioned along a lateral side of the PCB  110  (e.g., a side of the PCB  110  that is substantially parallel to the longitudinal axis  306 ), such that the second antenna  208  is approximately 90 degrees out of phase with the first antenna  206 . 
     The first antenna  206  may include any suitable structure that enables dual-band functionality. In the illustrated example, the first antenna  206  includes a first element  308  and a second element  310 . The first element  308  of the first antenna  206  has a generally L-shaped structure. The second element  310  of the first antenna  206  has a generally T-shaped structure. The first element  308  includes a grounded connection  312  (e.g., “foot”). Optionally, the first element  308  also includes an additional grounded connection  314 ). The first element  308  extends, in relation to the switch mechanism  302  on the PCB  110 , radially outward from the PCB  110 . In addition, the first element  308  includes an arm  316 , which is tunable to a first frequency (e.g., 2.4 GHz). The arm  316  is capacitively coupled to the second element  310  of the first antenna  206 . For example, the arm  316  radially overlaps with an arm  318  of the second element  310  but does not physically contact the arm  318 . Rather, the arms  316  and  318  are separated by a gap  320 , which is usable to tune the first antenna  206  based on a width of the gap  320 . For example, the gap  320  may be used as a tuning element to tune the 2.4 GHz frequency. 
     The second element  310  includes another arm  322  that extends in an opposite direction than that of the arm  318 . The arm  322  is usable to tune a second frequency (e.g., 5 GHz). In aspects, the arm  322  has a length that is shorter than that of the arm  316 , which enables the arm  322  to be used for higher frequencies and the arm  316  to be used for lower frequencies. In aspects, the arm  322  may also be shorter in length than the arm  318 . The second element  310  includes a center post  324  of the “T” structure, which extends from the arms  318  and  322  toward the switch mechanism  302  and has a terminal  326 . In some aspects, the terminal  326  may be implemented as a radio terminal used to deliver power to the first antenna  206  from a power source (not shown). For example, the second element  310  may be connected, via the terminal  326 , to a chipset mounted on the PCB  110 . The arms  316 ,  318 , and  322  each form an arc that extends along a circumferential line concentric with an outer circumference of the PCB  110 , in particular each of the arms  316 ,  318 , and  322  may be concentric with the PCB  110 . 
     The second antenna  208  may include any suitable structure that enables dual-band functionality. In the illustrated example, the second antenna  208  has a generally F-shaped structure and is oriented to be substantially aligned lengthwise with a direction of the longitudinal axis  306  of the PCB  110 . For example, the second antenna  208  includes a feed terminal  328  (e.g., a radio terminal used to deliver power to the second antenna  208  from a power source (not shown)) and a ground connection  330 . In addition, the second antenna  208  includes multiple arms (e.g., arm  332  and arm  334 ) extending in opposite directions that are substantially parallel to the longitudinal axis  306 . In the illustrated example, the arm  332  extends downward (e.g., in a direction toward the longitudinal end  304  (e.g., tip) of the PCB  110 ) and the arm  334  extends upward (e.g., in a direction toward the camera-side end  144  shown in  FIG.  2   ). The arm  332  has a length that is longer than that of the arm  334 , such that the arm  332  is tunable to the first frequency (e.g., 2.4 GHz) and the arm  334  is tunable to the second frequency (e.g., 5 GHz). 
     In aspects, the feed terminal  328  of the second antenna  208  is positioned such that a line  336 , drawn from the feed terminal  328  in a direction toward and orthogonal to the longitudinal axis  306  of the PCB  110 , does not intersect the switch mechanism  302 . Rather, the switch mechanism  302  is located between the line  336  and a longitudinal end  304  (e.g., tip) of the PCB  110 . Such placement enables electric current to run orthogonally compared to that of the grounded connection  312  (or the additional grounded connection  314 ) of the first antenna  206 , which enables the radiation patterns of the first and second antennas  206  and  208 , respectively, to be approximately 90 degrees from each other. 
     To further increase antenna efficiency while still maintaining high isolation between the first and second antennas  206  and  208 , the arm  332  is positioned to partially overlap (and not completely overlap) the battery  120 , in order to reduce signal interference caused by the battery  120 . For example, the arm  332  of the second antenna  208  includes a first portion  338  and a second portion  340 . The first portion  338  overlaps lengthwise with the battery  120  (in the y-direction). The second portion  340 , however, does not overlap the battery  120  in any of the x, y, or z directions. Notice that the arm  334  (e.g., the smaller arm) overlaps lengthwise with the battery  120  but extends widthwise (e.g., in the x-direction) beyond an edge of the battery  120 . In this way, the first portion  338  of the arm  332  is positioned to not overlap widthwise (e.g., in the x-direction) with the battery  120 . Such placement of the different parts of the second antenna  208  relative to the battery  120  may reduce signal interference caused by the battery  120  and enable the radiation pattern of the second antenna  208  to reach around the side of the battery  120 . 
     Returning to  FIG.  2   , when the electronic device  100  is assembled, the dual-antenna system  116  is positioned directly in front of the speaker module  124 . In this way, and as shown in  FIG.  1   , the dual-antenna system  116  is positioned between the speaker module  124  and the button  122 . For operation and control of the speaker module  124 , the speaker module  124  is electrically connected to the PCB  110 , e.g., via the electrical contacts  210 . Some assembly methods may electrically connect the speaker module  124  to the PCB  110  by soldering wires to the speaker path, plucking the wires into the PCB  110 , and then placing the speaker module  124  and the PCB  110  in close proximity for assembly within the housing of the electronic device  100 . This assembly method results in a significantly longer electrical path than an actual distance between the speaker module  124  and the PCB  110  in the assembly, which may affect the antenna isolation. To improve the antenna isolation, a shorter electrical path may be implemented, which is described in more detail below. 
     Consider  FIG.  4   , which illustrates a zoomed-in view  400  of a surface  402  of the PCB  110  that faces the speaker module  124  from  FIG.  1   . In aspects, the surface  402  of the PCB  110  is opposite a second surface of the PCB  110  that faces the button  122  (shown in  FIGS.  1 - 3   ). As illustrated, electrical connectors  404  may be implemented to create an electrical path that is substantially similar (e.g., approximately the same length) as the distance between the speaker module  124  and the PCB  110 , provided a tolerance on the order of approximately two millimeters. For low-cost implementations, the electrical connectors  404  may include spring clips, which are connected to the PCB  110  at one or more locations between the first and second antennas  206  and  208 , which are indicated by dashed lines showing approximate locations of the first and second antennas  206  and  208 , respectively, positioned on the second surface of the PCB  110 , which is hidden in  FIG.  4    but shown in  FIGS.  1 - 3   ). Spring clips (or other electrical connectors) may be mounted to the PCB  110  using any suitable mounting technique, including surface-mount technology (SMT) methods. The spring clips are mounted on an opposite side of the PCB  110  from the dual-antenna system  116 . When the PCB  110  is aligned with and placed in proximity to the speaker module  124 , the spring clip interfaces with (e.g., abuts) electrical contacts on the speaker module  124  to form an electrical connection. In some implementations, however, the spring clips may be mounted to the speaker module  124  and configured to interface with an electrical contact on the PCB  110 . Although spring clips are described herein, any suitable connector may be used to create the electrical path, including a pin connector (e.g., pogo pin) or a wire connector. 
     To further control and reduce the length of the electrical path between the PCB  110  and the speaker module  124 , the speaker module  124  includes one or more raised areas (e.g., pedestals  150  in  FIG.  1   ) extending toward the PCB  110 . An open end of the raised area (e.g., a surface of the pedestal  150  that faces the PCB  110 ) may include an electrical contact (e.g., the electrical contacts  210  in  FIG.  2   ) that interfaces with the connector  404  (e.g., spring clip) mounted on the PCB  110 . The raised area decreases the distance between the electrical contacts  210  and the PCB  110 . 
     In addition, to choke off adverse electrical effects to the first and second antennas  206  and  208  caused by the speaker module  124 , one or more chokes  406  (e.g., inductors) may be placed on the PCB  110  in series with the connectors  404  on the PCB  110 . Notice that the chokes  406  are located in close proximity to the connectors  404 . This close proximity of the chokes  406  to the connectors  404  helps improve the antenna efficiency and isolation. In implementations, at least one choke  406  is positioned between the two connectors  404  and another choke  406  is positioned between a connector  404  and the longitudinal axis  306  of the PCB  110 . In one implementation, the connectors  404  and chokes  406  are arranged together in a substantially L-shaped formation, which extends outward from the longitudinal axis  306  of the PCB  110  in a first direction that is substantially orthogonal to the longitudinal axis  306  and then extends in a second direction that is substantially parallel to the longitudinal axis  306 . The connectors  404  and chokes  406  may be arranged in any suitable arrangement relative to one another and the longitudinal axis  306  of the PCB  110 , including, e.g., a generally T-shaped arrangement, a generally F-shaped arrangement. 
       FIG.  5    illustrates a sectional view  500  of the PCB  110  from  FIG.  4   , taken along line A-A, and including the speaker module  124  and the connectors  404 . In the illustrated example, the connectors  404  are implemented as spring clips  404 - 1  and  404 - 2 . The spring clips  404 - 1  and  404 - 2  are mounted to a first surface  502  of the PCB  110 , which is opposite a second surface  504  on which the dual-antenna system  116  (shown in  FIGS.  1 - 3   ) is mounted. The speaker module  124  includes conductive surfaces (e.g., electrical contacts  506 - 1  and  506 - 2 ) for electrically connecting the speaker module  124  to the connectors  404  (e.g., the spring clips  404 - 1  and  404 - 2 ). To reduce a distance  508  between the PCB  110  and the electrical contacts  506 - 1  and  506 - 2 , the speaker module  124  includes pedestals  150 - 1  and  150 - 2 , which are instances of the pedestals  150  in  FIG.  1   . The pedestals  150 - 1  and  150 - 2  extend from the speaker module  124  toward the PCB  110 . Each of the pedestals  150 - 1  and  150 - 2  have an open end  510  (e.g., open ends  510 - 1  and  510 - 2 , respectively) on which one of the electrical contacts  210  is located. Using the pedestals  150 - 1  and  150 - 2 , the distance  508  can be finely controlled to reduce the electrical path between the speaker module  124  and the PCB  110 , and consequently reduce the resistance along the electrical path. 
     Example Computing System 
       FIG.  6    is a block diagram illustrating an example system  600  that includes an example device  602 , which can be implemented as any electronic device (e.g., the electronic device  100 ) that implements aspects of the dual-antenna system  116  as described with reference to the previous  FIGS.  1 - 5   . The example device  602  may be any type of computing device, client device, mobile phone, tablet, communication, entertainment, gaming, media playback, and/or other type of device. Further, the example device  602  may be implemented as any other type of electronic device that is configured for communication on a network, such as a thermostat, hazard detector, camera, light unit, commissioning device, router, border router, joiner router, joining device, end device, leader, access point, a hub, and/or other electronic devices. The example device  602  can be integrated with electronic circuitry, microprocessors, memory, input output (I/O) logic control, communication interfaces and components, as well as other hardware, firmware, and/or software to communicate via the network. Further, the device  602  can be implemented with various components, such as with any number and combination of different components as further described below. 
     The device  602  includes communication devices  604  that enable wired and/or wireless communication of device data  606 , such as data that is communicated between the devices in a network, data that is being received, data scheduled for broadcast, data packets of the data, data that is synched between the devices, etc. The device data can include any type of communication data, as well as audio, video, and/or image data that is generated by applications executing on the device. The communication devices  604  can also include transceivers for cellular phone communication and/or for network data communication. The communication devices  604  can include wireless radio systems for multiple, different wireless communications systems. The wireless radio systems may include Wi-Fi, Bluetooth™, Mobile Broadband, Bluetooth Low Energy (BLE), and/or point-to-point IEEE 802.15.4. Each of the different radio systems can include a radio device, antenna, and chipset that is implemented for a particular wireless communications technology. 
     The device  602  also includes input/output (I/O) interfaces  608 , such as data network interfaces that provide connection and/or communication links between the device, data networks (e.g., an internal network, external network, etc.), and other devices. The I/O interfaces can be used to couple the device to any type of components, peripherals, and/or accessory devices. The I/O interfaces also include data input ports via which any type of data, media content, and/or inputs can be received, such as user inputs to the device, as well as any type of communication data, such as audio, video, and/or image data received from any content and/or data source. 
     The device  602  includes a processing system  610  that may be implemented at least partially in hardware, such as with any type of microprocessors, controllers, or the like that process executable instructions. The processing system can include components of an integrated circuit, programmable logic device, a logic device formed using one or more semiconductors, and other implementations in silicon and/or hardware, such as a processor and memory system implemented as a system-on-chip (SoC). Alternatively or in addition, the device can be implemented with any one or combination of software, hardware, firmware, or fixed logic circuitry that may be implemented with processing and control circuits. The device  602  may further include any type of a system bus or other data and command transfer system that couples the various components within the device. A system bus can include any one or combination of different bus structures and architectures, as well as control and data lines. 
     The device  602  also includes computer-readable storage memory  606 , such as data storage devices that can be accessed by a computing device, and that provide persistent storage of data and executable instructions (e.g., software applications, modules, programs, functions, or the like). The computer-readable storage memory described herein excludes propagating signals. Examples of computer-readable storage memory include volatile memory and non-volatile memory, fixed and removable media devices, and any suitable memory device or electronic data storage that maintains data for computing device access. The computer-readable storage memory can include various implementations of random access memory (RAM), read-only memory (ROM), flash memory, and other types of storage memory in various memory device configurations. 
     The computer-readable storage memory  606  provides storage of the device data  606  and various device applications  614 , such as an operating system that is maintained as a software application with the computer-readable storage memory and executed by the processing system  610 . The device applications may also include a device manager, such as any form of a control application, software application, signal processing and control module, code that is native to a particular device, a hardware abstraction layer for a particular device, and so on. In this example, the device applications also include a smart-home application  616  that implements aspects of the dual-antenna system  116 , such as when the example device  602  is implemented as any of the electronic devices described herein. The device  602  also includes a power source  618 , such as the battery  120 . An alternating current (AC) power source may also be used to charge the battery of the device. 
     In aspects, at least part of the techniques described for the dual-antenna system  116  may be implemented in a distributed system, such as over a “cloud”  620  in a platform  622 . The cloud  620  includes and/or is representative of the platform  622  for services  624  and/or resources  626 . 
     The platform  622  abstracts underlying functionality of hardware, such as server devices (e.g., included in the services  624 ) and/or software resources (e.g., included as the resources  626 ), and communicatively connects the example device  602  with other devices, servers, etc. The resources  626  may also include applications and/or data that can be utilized while computer processing is executed on servers that are remote from the example device  602 . Additionally, the services  624  and/or the resources  626  may facilitate subscriber network services, such as over the Internet, a cellular network, or Wi-Fi network. The platform  622  may also serve to abstract and scale resources to service a demand for the resources  626  that are implemented via the platform, such as in an interconnected device implementation with functionality distributed throughout the system  600 . For example, the functionality may be implemented in part at the example device  602  as well as via the platform  622  that abstracts the functionality of the cloud  620 . 
     CONCLUSION 
     Although aspects of the dual-antenna system have been described in language specific to features and/or methods, the subject of the appended claims is not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed as example implementations of the claimed dual-antenna system or a corresponding electronic device, and other equivalent features and methods are intended to be within the scope of the appended claims. Further, various different aspects are described, and it is to be appreciated that each described aspect can be implemented independently or in connection with one or more other described aspects.