Multi-mode high isolation antenna system

Abstract

This application relates to a multi-mode high isolation antenna system. A multi-mode high isolation antenna system and related methods and systems are described herein. The described antenna system is implemented on a generally circular printed circuit board and can be used for broadband and ultra-wideband applications. The multi-mode high isolation antenna system includes two orthogonal antennas separated by a decoupling structure. This arrangement provides a high degree of isolation between the antennas and enables five unique resonant operating modes for the multi-mode high isolation antenna system.

Description

[0001] Division Case Explanation

[0002] This application is a divisional application of Chinese Patent Application No. 202010795834.1 with an application date of August 10, 2020. Technical Field

[0003] This application relates to a multi-mode high-isolation antenna system. Background Art

[0004] In some electronic devices, an antenna system using multiple antennas can be implemented for wireless communication. However, the isolation between multiple antennas may be limited by the surrounding hardware of the electronic device, especially for low-band frequencies. Antenna isolation is a measure of the ratio of the power incident on the first antenna to the power transmitted to the second antenna. Thus, good isolation results in uncorrelated transmission and reception of electrical signals on the two antennas. Poor isolation between antennas greatly degrades the performance of multiple-input multiple-output (MIMO) systems and antenna efficiency. In addition, in some cases, low isolation can cause intermodulation, which leads to certification failure due to out-of-band spurious emissions. Summary of the Invention

[0005] A multi-band high-isolation antenna system and related techniques and systems are described herein. The described antenna system can be implemented on a generally circular printed circuit board and can be used for broadband and ultra-wideband applications. The multi-mode high-isolation antenna system can include two substantially orthogonal antennas separated by a decoupling structure. This arrangement provides high isolation between the antennas and enables five unique resonant operating modes for the multi-mode high-isolation antenna system. Additionally, the two antennas may have high radiation performance and complementary radiation patterns, which may be essential for excellent multiple-input multiple-output (MIMO) and diversity performance.

[0006] According to one aspect, a multi-mode antenna system is provided. The multi-mode antenna system can include a generally circular printed circuit board, a first antenna connected to the printed circuit board, and a second antenna connected to the printed circuit board. The second antenna may be out of phase with the first antenna by approximately 90 degrees. The multi-mode antenna system may further include a decoupling structure connected to the printed circuit board at a position between the first antenna and the second antenna.

[0007] The multi-mode antenna system may include the following optional features. At least one of the first antenna or the second antenna may include an inverted-F antenna, a first loop structure aligned with the inverted-F antenna, and a second loop structure located adjacent to the inverted-F antenna. The second loop structure and the inverted-F antenna may share a connection point to the printed circuit board. The inverted-F antenna may include a post that is connected to the printed circuit board and extends radially outward from a generally circular printed circuit board with respect to the center point or centroid of the printed circuit board. The inverted-F antenna may include an arm having an arc that extends along a circumferential line concentric with the outer circumference of the PCB. In particular, the arm may be concentric with the printed circuit board. The first loop structure may be located between the printed circuit board and the arm of the inverted-F antenna. The length of the arm of the inverted-F antenna may be in the range of approximately 16 millimeters to approximately 18 millimeters. The second loop structure may include an additional post that is connected to the printed circuit board and extends radially outward from the printed circuit board. The second loop structure may include a crossbar that is connected to the post of the inverted-F antenna and has an arc concentric with the printed circuit board. The inverted-F antenna may have an arm with an open end that is located in the range of approximately 4 millimeters to approximately 6 millimeters away from the printed circuit board. The decoupling structure may include a T-shaped element having a central post and two arms that are substantially coplanar with the printed circuit board. One of the two arms of the T-shaped element may radially overlap a portion of the second loop structure. The length of each arm of the T-shaped element may be in the range of approximately 12 millimeters to approximately 14 millimeters.

[0008] The multi-mode antenna system may further include the following optional features. At least one of the first antenna or the second antenna may include: an inverted F antenna that can operate as a quarter-wavelength monopole at a first low-frequency band frequency and as a three-quarter-wavelength monopole at a first high-frequency band frequency; a first loop structure that can operate as a half-wavelength folded monopole at a second high-frequency band frequency; and a second loop structure that can operate as a half-wavelength folded monopole at a third high-frequency band frequency. The decoupling structure may include a T-shaped element combined with an inverted F structure that operates as a quarter-wavelength monopole at a second low-frequency band frequency, and the T-shaped element can operate as a quarter-wavelength monopole at the second low-frequency band frequency. The multi-mode antenna system may further include a touch sensor located near at least one of the first antenna and the second antenna. The touch sensor can operate to conduct current when the first loop structure operates as a half-wavelength folded monopole at the first high-frequency band frequency. The first low-frequency band frequency may be approximately 2.4 GHz, the second low-frequency band frequency may be approximately 2.73 GHz, the first high-frequency band frequency may be approximately 5.85 GHz, the second high-frequency band frequency may be approximately 5.15 GHz, and the third high-frequency band frequency may be approximately 7.6 GHz. The printed circuit board may be coplanar with each of the first antenna, the second antenna, and the decoupling structure. The decoupling structure may be out of phase with each of the first antenna and the second antenna by approximately 45 degrees. The first antenna and the second antenna in combination with the decoupling structure can operate in multiple resonance modes between approximately 2 GHz and approximately 8 GHz.

[0009] According to another aspect, an electronic device is provided that may include the multi-mode antenna system as described above.

[0010] The present invention content is provided to introduce a simplified concept related to a multi-band high isolation antenna system, which will be further described in the detailed implementation and the drawings below. This invention content is not intended to identify the essential features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Details of one or more aspects of the multi-band high isolation antenna system are described herein with reference to the following drawings. The same numbers are used throughout the drawings to refer to similar features and components:

[0012] Figure 1 A top view of an example embodiment of a multi-mode high isolation antenna system is shown.

[0013] Figure 2 Shows Figure 1 An enlarged view of a part of the top view of, which illustrates the first antenna of the multi-mode high isolation antenna system.

[0014] Figure 3represents a plot of the S-parameter curve corresponding to the power reflected by the first antenna of a multi-mode high isolation antenna system in the frequency range of approximately 2 GHz to approximately 8 GHz Figure 1 in

[0015] Figure 4 shows an example diagram that illustrates the current flow in a multi-mode high isolation antenna system at approximately 2.44 GHz and the plot of the corresponding S11 parameter when the first radio terminal is excited.

[0016] Figure 5 shows an example diagram that illustrates the current flow in a multi-mode high isolation antenna system at approximately 2.73 GHz and the plot of the corresponding S11 parameter when the first radio terminal is excited.

[0017] Figure 6 shows an example diagram that illustrates the current flow in a multi-mode high isolation antenna system at approximately 5.15 GHz and the plot of the corresponding S11 parameter when the first radio terminal is excited.

[0018] Figure 7 shows an example diagram that illustrates the current flow in a multi-mode high isolation antenna system at approximately 5.85 GHz and the plot of the corresponding S11 parameter when the first radio terminal is excited.

[0019] Figure 8 shows an example diagram that illustrates the current flow in a multi-mode high isolation antenna system at approximately 7.6 GHz and the plot of the corresponding S11 parameter when the first radio terminal is excited.

[0020] Figure 9 shows a front perspective view and a top view of an example electronic device implementing a multi-mode high isolation antenna system.

[0021] Figure 10 shows a cross-section of the electronic device taken along section line 10-10 and taken in a horizontal section Figure 9 of

[0022] Figure 11 is a block diagram showing an example electronic device that can be implemented as any electronic device connectable to a wireless network, the electronic device including a multi-mode high isolation antenna system according to one or more aspects described herein.

[0023] Figure 12 is a block diagram showing an example system including an example device that can be implemented to implement as described with reference to the previous Figure 1-11Any electronic device for aspects of the described multi-mode high isolation antenna system 102. Detailed Description

[0024] Overview

[0025] Using multiple antennas in an electronic device can lead to poor isolation between the antennas due to the proximity of the antennas in terms of signal wavelength. Poor isolation corresponds to a reduction in antenna efficiency. Described herein are multi-band high isolation antenna systems and related techniques and systems. The multi-band high isolation antenna system has high isolation (e.g., greater than 20 decibels (dB)) between multiple antennas at multiple frequency bands (e.g., 2.4 GHz and 5 GHz bands). The antenna has a decoupling structure between two adjacent antennas to reduce the amount of electrical current flowing from one antenna to the other, particularly at specific frequencies, which increases the isolation between these frequencies among the antennas.

[0026] In aspects, a multi-mode antenna is disclosed. The multi-mode antenna includes a generally circular printed circuit board, a first antenna connected to the printed circuit board, and a second antenna connected to the printed circuit board. The second antenna is approximately 90 degrees out of phase with the first antenna. Additionally, the multi-mode antenna includes a decoupling structure connected to the printed circuit board at a location between the first antenna and the second antenna.

[0027] In aspects, an electronic device is disclosed. The electronic device includes a generally spherical housing, a generally circular printed circuit board (PCB) located within the housing, a speaker assembly located within the housing, and two antennas connected to the PCB. The two antennas are approximately 90 degrees out of phase with each other. Additionally, the electronic device includes a decoupling structure located between the two antennas.

[0028] These are just a few examples of how the described techniques and devices can be used to enable a multi-mode high isolation antenna system. Other examples and embodiments are described throughout this document. Now, turning to example devices, example systems are described thereafter.

[0029] Example Devices

[0030] Figure 1 A top view 100 showing an example embodiment of a multi-mode high isolation antenna system 102 is presented. The multi-mode high isolation antenna system 102 includes a first antenna 104, a second antenna 106, and a decoupling structure 108, each connected to a printed circuit board (PCB) 110. Thus, the multi-mode high isolation antenna system 102 can be referred to as a PCB antenna. Additionally, one or more touch sensors 112 can be attached to the PCB 110 at locations near the first antenna 104 and / or the second antenna 106. As further described below, the multi-mode high isolation antenna system 102 can be located inside the housing 114 of an electronic device.

[0031] The PCB 110 has a circular or substantially circular (or oval) shape, with a portion removed to provide space for the first antenna 104, the second antenna 106, and the decoupling structure 108. The first and second axes, which are perpendicular to each other and define the plane in which the PCB 110 extends, define the PCB 110. The first axis may correspond to the vertical axis 116, and the second axis may correspond to the horizontal axis 118. In various aspects, the touch sensor 112 includes two touch sensors that are positioned opposite each other on opposite sides of the first axis (e.g., the vertical axis 116) of the PCB 110 and along the second axis (e.g., the horizontal axis 118) of the PCB 110.

[0032] As shown, the first antenna 104 and the second antenna 106 are approximately 90 degrees out of phase, such that the two antennas are substantially orthogonal. This offset can provide complementary coverage and help provide pattern diversity and high isolation at high frequency bands. The second antenna 106 may have substantially the same structure as the first antenna 104 and is positioned symmetrically about the vertical axis 116. Alternatively, the second antenna 106 may have a different structure from the first antenna 104. The decoupling structure 108 increases the isolation between the first antenna 104 and the second antenna 106. The position of the decoupling structure 108, in combination with optimizing the positions of the first antenna 104 and the second antenna 106, greatly increases the isolation between the antennas.

[0033] The decoupling structure 108 is located between the first antenna 104 and the second antenna 106 such that the decoupling structure 108 is approximately 45 degrees out of phase with each of the first antenna 104 and the second antenna 106. Thus, the first antenna 104, the second antenna 106, and the decoupling structure 108 are positioned as a group on one half of the PCB 110. The decoupling structure 108 is a T-shaped element (e.g., a T monopole) having a central post 120 and two arms 122 that are coplanar with the PCB 110. In various aspects, the length of each arm 122 of the T-shaped element is in the range of approximately 12 millimeters to approximately 14 millimeters. At least one of the two arms 122 of the T-shaped element may radially overlap a portion of the first antenna 104 or a portion of the second antenna 106. The central post 120 extends radially outward from the PCB 110 relative to the center point or centroid of the PCB. The arms 122 form an arc that extends along a circumferential line concentric with the outer circumference of the PCB 110. In particular, each arm 122 may be concentric with the PCB 110.

[0034] By including a decoupling structure 108 between antennas 104 and 106, the isolation between antennas 104 and 106 is greatly improved because the decoupling structure 108 blocks a large amount of current that would otherwise attempt to flow from one antenna to the other. At certain frequencies, current flows in the decoupling structure 108 rather than in the other antenna, which enables the antenna system to use a greater range of resonant frequencies than would be possible with a typical antenna system without the decoupling structure 108.

[0035] As follows about Figure 3 As further described, the multi-mode high isolation antenna system 102 has a first radio terminal (e.g., port 1) for transmitting power from a power source (not shown) to a first antenna 104. In addition, the multi-mode high isolation antenna system 102 has a second radio terminal (e.g., port 2) for transmitting power from a power source (not shown) to a second antenna 106.

[0036] Figure 2 Shows Figure 1 100, showing the first antenna 104 of the multi-mode high isolation antenna system 102. The first antenna 104 has an inverted F-shaped antenna (IFA) structure 202, a first loop structure 204 and a second loop structure 206. As shown, the first antenna 104 is connected to the PCB 110 at a plurality of connection points 208-1, 208-2, 208-3. Any arrangement of suitable connection points 208 can be used to attach the first antenna 104 to the PCB 110. In addition, the inverted F-shaped antenna can be replaced with an inverted L-shaped antenna (ILA) structure to achieve similar functions and performance.

[0037] The first loop structure 204 is substantially aligned with the inverted-F antenna 202. For example, the first loop structure 204 is located between the inverted-F antenna 202 and the PCB 110. The second loop structure 206 is located adjacent to the inverted-F antenna 202. In various aspects, the second loop structure 206 and the inverted-F antenna 202 share a common connection point 208-1 to the PCB 110. Furthermore, as shown in FIG. Figure 1 As shown, the inverted-F antenna 202 overlaps a portion of the second loop structure 206 in the radial direction.

[0038] The inverted-F antenna 202 has a post 210 and an arm 212. The post 210 extends radially outward from the PCB 110 relative to the center point or centroid of the PCB 110. The arm 212 is an arc extending along a circumferential line concentric with the outer circumference of the PCB 110. In particular, the arm 212 can be concentric with the PCB 110. The post 210 is connected to the PCB 110. In various aspects, the length a 214 of the arm 212 is in the range of approximately 16 millimeters (mm) to approximately 18 mm. An example length a 214 of the arm 212 from the post 210 to the open end 216 of the arm 212 is about 17 mm. Additionally, the open end 216 of the arm 212 is located on the far side of the PCB 110 at a distance b 218, which is in the range of approximately 4 mm to approximately 6 mm. An example distance b 218 between the open end 216 of the arm 212 and the PCB 110 is about 5 mm.

[0039] The first loop structure 204 includes a post 220 and a crossbar 222. The post 220 extends radially outward from the PCB 110 relative to the center point or centroid of the PCB 110, and the crossbar 222 is an arc extending along a circumferential line concentric with the outer circumference of the PCB 110. In particular, the crossbar 222 can be concentric with the PCB 110. The crossbar 222 is connected to the post 220 of the inverted-F antenna 202 and a second post 224 to form the first loop structure 204. Additionally, the crossbar 222 includes a member 226 that extends radially outward from the crossbar 222 such that the member 226 is located between the crossbar 222 and the arm 212 of the inverted-F antenna 202. The second loop structure 206 includes one or more posts 228 and a crossbar 230 that are connected to the PCB 110 at the connection point 208-3. The one or more posts 228 extend radially outward from the PCB 110 relative to the center point or centroid of the PCB 110. The crossbar 230 is connected to the one or more posts 228 and is an arc extending along a circumferential line concentric with the outer circumference of the PCB 110. In particular, the crossbar 230 can be concentric with the PCB 110. The crossbar 230 is also connected to the post 210 of the inverted-F antenna 202 to form the loop of the second loop structure 206.

[0040] Figure 3 is a plot 300 of a curve 302, which represents the response of the antenna in the frequency range of approximately 2 GHz to approximately 8 GHz by Figure 1The S-parameters corresponding to the power reflected by the first antenna 104 of the multi-mode high isolation antenna system. S-parameters describe the input-output relationships between terminals in an electrical system. Consider an example device that uses two radio devices (Radio Device 1 and Radio Device 2), which supply power to two antennas (Antenna 1 and Antenna 2) via two radio terminals (Terminal 1 and Terminal 2), respectively. The parameter S11 refers to the reflected power (also known as the reflection coefficient) that Radio Device 1 attempts to transfer to Antenna 1. The parameter S22 refers to the reflected power that Radio Device 2 attempts to transfer to Antenna 2. The parameter S12 represents the transmission coefficient, which corresponds to the power from Radio Device 2 that is transferred to Radio Device 1 through Antenna 1. The parameter S21 represents the transmission coefficient corresponding to the power from Radio Device 1 that is transferred to Radio Device 2 through Antenna 2. Generally, S-parameters are a function of frequency.

[0041] In the illustrated drawing 300, curve 302 represents the S11 parameter, which indicates the amount of power reflected by the first antenna 104 between frequencies of approximately 2 GHz to approximately 8 GHz (at the first radio terminal). At point 304, the S-parameter at a low-band frequency of approximately 2.4 GHz is below -27 dB, indicating a very low power loss through reflection. At point 306, the S11 at a low-band frequency near approximately 2.73 GHz is approximately -5 dB. At point 308, the S11 at a high-band frequency near approximately 5.15 GHz is below -20 dB. At point 310, the S11 at a high-band frequency near approximately 5.85 GHz is approximately -14 dB. At point 312, the S11 at a high-band frequency of approximately 7.6 GHz is approximately -8 dB. Curve 314 represents the S22 parameter, which indicates the amount of power reflected by the second antenna 106 (at the second radio terminal). Curve 314 exhibits behavior similar to the S11 parameter (curve 302) of the first antenna 104.

[0042] The multi-mode high isolation antenna system 102 can operate on five unique resonant modes to cover each of the above frequencies. For example, the multi-mode high isolation antenna system 102 uses 1 / 4 wavelength (λ) and 3 / 4λ (IFA or ILA) to cover 2.4 GHz and 5.8 GHz, respectively. The multi-mode high isolation antenna system 102 uses a 1 / 2λ folded monopole for Figure 2 the first loop structure 204 in to cover 5.15 GHz. The multi-mode high isolation antenna system 102 uses a 1 / 2λ folded monopole for the second loop structure 206 to cover 7.6 GHz. The multi-mode high isolation antenna system 102 uses a 1 / 4λ monopole mode for Figure 1 the decoupling structure 108 of (such as a T monopole) to reduce the coupling between the first antenna 104 and the second antenna 106. Refer to Figure 4-8 for further description of each of these modes.

[0043] Curve 316 represents the S21 parameter, indicating the amount of isolation between the first antenna 104 and the second antenna 106. The S12 parameter matches the S21 parameter and can thus also be represented by curve 316. The multi-mode high-isolation antenna system 102 has high isolation (e.g., S21 less than -20 dB) at both 2.4 GHz and 5.15 GHz frequencies, as shown at points 318 and 320, respectively. At point 322, the isolation at 5.85 GHz is also high (e.g., S21 less than -25 dB). Additionally, as shown at points 324 and 326, respectively, the isolation at 2.73 GHz and 7.6 GHz is high (e.g., S21 less than -14 dB). Thus, the multi-mode high-isolation antenna system 102 can radiate broadband and also has the potential for ultra-wideband (e.g., 6 GHz to 8 GHz). Further, for different frequencies that are used simultaneously, the multi-mode high-isolation antenna system 102 can use a switching diversity scheme to switch between the first antenna 104 and the second antenna 106. For example, using the switching diversity scheme, the electronic device 102 can determine the received signal with the maximum energy and switch to the corresponding antenna. The switching can occur dynamically. Alternatively, the switching can occur during installation such that when the electronic device 102 is installed on a network, the electronic device selects the antenna with a better connection to the router for a specific frequency.

[0044] Figure 4 Example figure 400 is shown, which illustrates the current flow and the corresponding plot of the S11 parameter in a multi-mode high-isolation antenna system when the first radio terminal is excited at a frequency of approximately 2.44 GHz. The direction of the arrow 402 in the figure indicates the direction of the current flowing through the multi-mode high-isolation antenna system 102 at approximately 2.44 GHz (represented by 404) from Figure 1 The curve 406 shows how the antenna operates in a quarter-wavelength (λ) monopole mode, without changing direction, with the current maximized at the terminal and minimized at the open end of the element. The magnitude of each arrow 402 indicates the amount of current flowing at that location. Here, the first antenna 104 uses an inverted-F antenna 202 (as shown by curve 406) to operate in a quarter-wavelength (λ) monopole mode. Alternatively, the first antenna 104 can use an inverted-L antenna in a 1 / 4λ monopole mode. The decoupling structure 108 provides additional current, which reduces the amount of current excited at the second radio terminal. The decoupling structure 108 is reactive and helps prevent current from flowing from one antenna to the other, which increases the isolation of each antenna.

[0045] Figure 5Shows an example diagram 500, which illustrates the current flow in the multi - mode high - isolation antenna system 102 at approximately 2.73 GHz (as indicated by 502) when the first radio terminal is excited, and the plot of the corresponding S11 parameter. Here, the first antenna 104 uses an inverted F - shaped antenna 202 (as shown by curve 406) to operate in a 1 / 4λ monopole mode (as shown by curve 406), and the decoupling structure 108 also operates in a 1 / 4λ monopole mode (as shown by arrow 504). The combination of these two modes provides a decoupling effect with respect to the second radio terminal. This frequency can be used for certain applications that require a wide operating bandwidth.

[0046] Figure 6 Shows an example diagram 600, which illustrates the current flow in the multi - mode high - isolation antenna system 102 at approximately 5.15 GHz (as indicated by 602) when the first radio terminal is excited, and the plot of the corresponding S11 parameter. Here, the first antenna 104 uses a first loop structure 204 to operate as a 1 / 2λ folded monopole. Alternatively, if a ground connection is included, the first loop structure 204 can operate in a 1λ loop mode. Each of arrows 604 and 606 indicates 1 / 4λ of the 1 / 2λ folded monopole. Note that some current flows in the touch sensor 112, such that the touch sensor 112 helps to increase the isolation between the antennas.

[0047] Figure 7 Shows an example diagram 700, which illustrates the current flow in the multi - mode high - isolation antenna system 102 at approximately 5.85 GHz (as shown by 702) when the first radio terminal is excited, and the plot of the corresponding S11 parameter. Here, the first antenna 104 operates as a 3 / 4λ monopole. For example, arrow 704 represents 1 / 2λ (similar to a dipole), and arrow 706 represents 1 / 4λ (similar to a monopole). They work together to operate as a 3 / 4λ monopole at 5.85 GHz. Thus, the third harmonic is used to generate an additional resonance, which broadens the bandwidth.

[0048] Figure 8 Shows an example diagram 800, which illustrates the current flow in the multi - mode high - isolation antenna system 102 at approximately 7.6 GHz (as shown by 802) when the first radio terminal is excited, and the plot of the corresponding S11 parameter. Here, the second loop structure 206 of the first antenna 104 is used as a parallel inductor. The second loop structure 206 operates as a 1 / 2λ folded monopole. Each of arrows 804 and 806 represents 1 / 4λ of the 1 / 2λ folded monopole. The second loop structure 206 serves both as a matching element and as a radiating element.

[0049] Figure 9A front perspective view 900 and a top view 910 of an example electronic device 902 implementing a multi-mode high isolation antenna system are shown. As further described below, the electronic device 902 can be an electronic device that can connect to a wireless network. The electronic device 902 is compact and generally spherical. The electronic device 902 has an oblate spherical housing 904 having a flat bottom such that the x-axis radius of the housing 904 is within a tolerance of approximately ten millimeters of the y-axis radius of the housing 904. The top view 910 includes a section line 10-10 corresponding to Figure 10 Cross-sectional view in .

[0050] Figure 10 The diagram is shown taken along the direction indicated by the section line 10-10 and on a horizontal section plane. Figure 9 1000 of an electronic device. In the cross-sectional view 1000, the electronic device 902 includes various hardware components within a housing 904 in a compact assembly. For example, the electronic device 902 includes a top cover 1002, a bottom cover 1004, a PCB 110 (including a multi-mode high isolation antenna system 102), a heat sink 1006, a touch sensor 1008, and a speaker 1010. The multi-mode high isolation antenna system 102 is located near and adjacent to the top cover 1002, and between the top cover 1002 and the heat sink 1006. The speaker 1010 is located within the housing, which is adjacent to the bottom cover 1004. In some aspects, a graphite sheet (not shown) can be located below the PCB 110, and the heat sink 1006 can be plastic.

[0051] Example computing system

[0052] Figure 11 1 is a block diagram illustrating an example electronic device 1100 that can be implemented as any electronic device that can connect to a wireless network and includes a multi-mode high isolation antenna system according to one or more aspects described herein. The device 1100 can be integrated with electronic circuits, microprocessors, memory, input / output (I / O) logic control, communication interfaces and components, and other hardware, firmware, and / or software to communicate via a network. In addition, the electronic device 1100 can be implemented with various components, such as with any number and combination of different components, as described with reference to Figure 12 The example apparatus shown is further described.

[0053] In this example, the electronic device 1100 includes a low-power microprocessor 1102 and a high-power microprocessor 1104 (e.g., a microcontroller or a digital signal processor) that process executable instructions. The device also includes input-output (I / O) logic control 1106 (e.g., including electronic circuitry). The microprocessors can include integrated circuits, programmable logic devices, logic devices formed using one or more semiconductors, and components in other implementations in silicon and / or hardware, such as processors and memory systems implemented as a system-on-chip (SoC). Alternatively or additionally, the device can be implemented with any one or combination of software, hardware, firmware, or fixed logic circuitry that can be implemented by processing and control circuitry. The low-power microprocessor 1102 and the high-power microprocessor 1104 can also support one or more different device functions. For example, the high-power microprocessor 1104 can perform computationally intensive operations, while the low-power microprocessor 1102 can manage less complex processes, such as detecting hazards or temperature from one or more sensors 1108. The low-power processor 1102 can also wake up or initialize the high-power processor 1104 for computationally intensive processing.

[0054] One or more sensors 1108 can be implemented to detect various characteristics, such as acceleration, temperature, humidity, water, supplied power, proximity, external movement, device movement, sound signals, ultrasonic signals, light signals, fire, smoke, carbon monoxide, satellite global positioning (GPS) signals, radio frequency (RF), or other electromagnetic signals or electromagnetic fields, etc. Thus, the sensors 1108 can include any one or combination of a temperature sensor, a humidity sensor, a hazard-related sensor, a safety sensor, other environmental sensors, an accelerometer, a microphone, an optical sensor up to and including a camera (e.g., a charge-coupled device or a video camera), an active or passive radiation sensor, a GPS receiver, and a radio frequency identification detector. In an implementation, the electronic device 1100 can include one or more primary sensors and one or more secondary sensors, such as primary sensors that sense data at the core operation center of the sensing device (e.g., sensing the temperature in a thermostat or sensing the smoke detector in a smoke detector), while the secondary sensors can sense other types of data (e.g., movement, light, or sound), which can be used for energy-saving goals or intelligent operation goals.

[0055] The electronic device 1100 includes a memory device controller 1110 and a memory device 1112, such as any type of non-volatile memory and / or other suitable electronic data storage devices. The electronic device 1100 may also include various firmware and / or software, such as an operating system 1114, which is stored in the memory as computer-executable instructions and executed by a microprocessor. The device software may also include a smart home application 1116 that implements aspects of an access point device. The electronic device 1100 further includes a device interface 1118 for docking with another device or peripheral component, and includes an integrated data bus 1120 that couples the various components of the electronic device for data communication between the components. The data bus in the electronic device may also be implemented as any one or combination of different bus structures and / or bus architectures.

[0056] The device interface 1118 may receive input from a user and / or provide information to the user (e.g., as a user interface), and the received input may be used to determine settings. The device interface 1118 may also include mechanical or virtual components responsive to user input. For example, a user may mechanically move a sliding or rotatable component, or may detect movement along a touchpad, and such movement may correspond to an adjustment of the device's settings. Physical and virtual movable user interface components may allow the user to make settings along a portion of an apparent continuum. The device interface 1118 may also receive input from any number of peripheral devices such as buttons, keypads, switches, microphones, and imagers (e.g., camera devices).

[0057] The electronic device 1100 may include: a network interface 1122, such as a network interface for communicating with other electronic devices on a network; and an external network interface for network communication such as via the Internet. The electronic device 1100 further includes a wireless radio system 1124 for wireless communication with other electronic devices via the network interface and for multiple different wireless communication systems. The wireless radio system 1124 may include Wi-Fi, Bluetooth TM , mobile broadband, Bluetooth Low Energy (BLE), and / or point-to-point IEEE 802.15.4. Each different radio system may include radio devices, antennas, and chipsets implemented for a specific wireless communication technology. The electronic device 1100 also includes a power source 1126 such as a battery, and / or for connecting the device to a line voltage. AC power may also be used to charge the device's battery.

[0058] Figure 12 is a block diagram showing an example system 1200 including an example device 1202, and the example device 1202 may be implemented to implement as referred to previously Figure 1-11Any electronic device for aspects of the described multi-mode high isolation antenna system 102. Example device 1202 can be any type of computing device, client device, mobile phone, tablet, communication, entertainment, gaming, media playback, and / or other types of devices. Additionally, example device 1202 can be implemented as any other type of electronic device configured to communicate over a network, such as a thermostat, hazard detector, camera, lighting unit, commissioning device, router, border router, junction router, junction device, end device, leader, access point, hub, and / or other electronic devices.

[0059] Device 1202 includes a communication device 1204 that enables wired and / or wireless communication of device data 1206, such as data communicated between devices in a network, data being received, data scheduled for broadcast, data packets of data, data synchronized between devices, etc. Device data can include any type of communication data, as well as audio, video, and / or image data generated by applications executing on the device. Communication device 1204 can also include a transceiver for cellular phone communication and / or for network data communication.

[0060] Device 1202 also includes an input / output (I / O) interface 1208, such as a data network interface that provides a connection and / or communication link between the device, a data network (e.g., internal network, external network, etc.), and other devices. The I / O interface can be used to couple the device to any type of component, peripheral device, and / or accessory device. The I / O interface also includes a data input port through which any type of data, media content, and / or input can be received, such as user input of the device and any type of communication data, such as audio, video, and / or image data received from any content and / or data source.

[0061] Device 1202 includes a processing system 1210 that can be implemented at least in part using hardware, such as any type of microprocessor or controller that processes executable instructions, etc. The processing system can include integrated circuits, programmable logic devices, logic devices formed using one or more semiconductors, and components in other implementations in silicon and / or hardware, such as a processor and memory system implemented as a system-on-chip (SoC). Alternatively or additionally, the device can be implemented using any one or combination of software, hardware, firmware, or fixed logic circuits that can be implemented using processing and control circuitry. Device 1202 can further include any type of system bus or other data and command transfer system that couples various components within the device. The system bus can include any one or combination of different bus structures and architectures, as well as control and data lines.

[0062] Device 1202 also includes a computer-readable storage memory 1212, such as a data storage device that provides persistent storage that can be accessed by a computing device and that provides data and executable instructions (e.g., software applications, modules, programs, functions, etc.). The computer-readable storage memory described herein does not include propagated signals. Examples of computer-readable storage memory include volatile and non-volatile memory, fixed and removable media devices, and any suitable storage device or electronic data memory that stores data for access by a computing device. 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.

[0063] The computer-readable storage memory 1212 provides storage of device data 1206 and various device applications 1214, such as an operating system that is saved using the computer-readable storage memory as a software application and executed by the processing system 1210. The device applications can also include device managers, such as any form of control application, software application, signal processing and control module, code inherent to a particular device, and a hardware abstraction layer for a particular device, and the like. In this example, the device applications also include a smart home application 1216 that implements aspects of an access point device, such as when the example device 1202 is implemented as any of the electronic devices described herein.

[0064] In various aspects, at least a portion of the techniques described for a multi-mode high isolation antenna system can be implemented in a distributed system, such as on a “cloud” 1224 in a platform 1226. The cloud 1224 includes and / or is representative of a platform 1226 of services 1228 and / or resources 1230.

[0065] The platform 1226 abstracts the underlying functionality of hardware such as server devices (e.g., included in the services 1228) and / or software resources (e.g., included as resources 1230), and communicatively connects the example device 1202 with other devices, servers, etc. The resources 1230 can also include applications and / or data that can be utilized when performing computer processing on a server remote from the example device 1202. Additionally, the services 1228 and / or resources 1230 can facilitate subscriber network services, such as via the Internet, a cellular network, or a Wi-Fi network. The platform 1226 can also be used to abstract and scale resources to serve the demand for resources 1230 implemented via the platform, such as in an interconnected device embodiment having functionality distributed throughout the system 1200. For example, this functionality can be implemented at the example device 1202 and via a portion of the platform 1226 that abstracts the functionality of the cloud 1224.

[0066] In addition to the above description, controls can be provided to a user (e.g., a visitor or a host) that allow the user to select whether and when the systems, programs, or features described herein can enable the collection of user information (e.g., information about the user's social network, social activities or behaviors, occupation, user preferences, or the user's current location) and whether to send content or communications from the server to the user. Additionally, before storing or using certain data, the data may be processed in one or more ways to remove personally identifiable information. For example, the user's identity may be processed so that no personally identifiable information can be determined for the user, or the user's geographical location may be generalized in the case of obtaining location information (such as at the city, zip code, or state level) so that the user's specific location cannot be determined. Thus, the user can control what information about the user is collected, how that information is used, and what information is provided to the user.

[0067] Some examples are given below.

[0068] Example 1: A multi-mode antenna system, comprising: a generally circular printed circuit board; a first antenna connected to the printed circuit board; a second antenna connected to the printed circuit board, the second antenna being out of phase with the first antenna by approximately 90 degrees; a decoupling structure connected to the printed circuit board at a position between the first antenna and the second antenna.

[0069] Example 2: The multi-mode antenna system of Example 1, wherein at least one of the first antenna or the second antenna comprises: an inverted F-shaped antenna; a first loop structure substantially aligned with the inverted F-shaped antenna; and a second loop structure located adjacent to the inverted F-shaped antenna, the second loop structure and the inverted F-shaped antenna sharing a connection point to the printed circuit board.

[0070] Example 3: The multi-mode antenna system according to Example 2, wherein the inverted F-shaped antenna comprises: a post connected to the printed circuit board and extending radially outward from the printed circuit board; and an arm having an arc concentric with the printed circuit board.

[0071] Example 4: The multi-mode antenna system according to Example 3, wherein the first loop structure is located between the printed circuit board and the arm of the inverted F-shaped antenna.

[0072] Example 5: The multi-mode antenna system according to Example 3 or 4, wherein the length of the arm of the inverted F-shaped antenna is in the range of approximately 16 millimeters to approximately 18 millimeters.

[0073] Example 6: The multi-mode antenna system according to any one of Examples 2 to 5, wherein the second loop structure comprises: an additional post connected to the printed circuit board and extending radially outward from the printed circuit board; and a cross beam connected to the post of the inverted F-shaped antenna and having an arc concentric with the printed circuit board.

[0074] Example 7: The multi-mode antenna system according to any one of Examples 2 to 6, wherein the inverted-F antenna has an arm with an open end that is located within a range of about 4 millimeters to about 6 millimeters away from the printed circuit board.

[0075] Example 8: The multi-mode antenna system according to any one of Examples 2 to 7, wherein the decoupling structure includes a T-shaped element having a central post and two arms that are substantially coplanar with the printed circuit board.

[0076] Example 9: The multi-mode antenna system according to Example 8, wherein one of the two arms of the T-shaped element radially overlaps a part of the second loop structure.

[0077] Example 10: The multi-mode antenna system according to Example 8 or 9, wherein the length of each arm of the T-shaped element is within a range of about 12 millimeters to about 14 millimeters.

[0078] Example 11: The multi-mode antenna system according to any one of the foregoing examples, wherein at least one of the first antenna or the second antenna includes: an inverted-F antenna that can operate as a quarter-wavelength monopole at a first low-frequency band frequency and as a three-quarter-wavelength monopole at a first high-frequency band frequency; a first loop structure that can operate as a half-wavelength folded monopole at a second high-frequency band frequency; and a second loop structure that can operate as a half-wavelength folded monopole at a third high-frequency band frequency.

[0079] Example 12: The multi-mode antenna system according to Example 11, wherein the decoupling structure includes: a T-shaped element that can operate as a quarter-wavelength monopole at a second low-frequency band frequency in combination with the inverted-F structure, and the inverted-F structure operates as a quarter-wavelength monopole at the second low-frequency band frequency.

[0080] Example 13: The multi-mode antenna system according to Example 11 or 12, further comprising: a touch sensor that is located close to at least one of the first antenna and the second antenna, and the touch sensor can operate to conduct current when the first loop structure operates as a half-wavelength folded monopole at a first high-frequency band frequency.

[0081] Example 14: The multi-mode antenna system according to any one of Examples 11 to 13, wherein: the first low-frequency band frequency is about 2.4 GHz; the second low-frequency band frequency is about 2.73 GHz; the first high-frequency band frequency is about 5.85 GHz; the second high-frequency band frequency is about 5.15 GHz; and the third high-frequency band frequency is about 7.6 GHz.

[0082] Example 15: A multi-mode antenna system of any of the foregoing examples, wherein the printed circuit board is coplanar with each of the first antenna, the second antenna, and the decoupling structure.

[0083] Example 16: A multi-mode antenna system of any of the foregoing examples, wherein the decoupling structure is out of phase with each of the first antenna and the second antenna by approximately 45 degrees.

[0084] Example 17: A multi-mode antenna system of any of the foregoing examples, wherein the first antenna and the second antenna combined with the decoupling structure can operate in multiple resonance modes between approximately 2 GHz and approximately 8 GHz.

[0085] Example 18: An electronic device comprising a multi-mode antenna system of any of the foregoing examples.

[0086] Conclusion

[0087] Although aspects of the multi-mode high isolation antenna system have been described in language specific to features and / or methods, the subject matter of the appended claims need not be limited to the specific features or methods described. Rather, the specific features and methods are disclosed as example embodiments of the claimed multi-mode antenna system or corresponding electronic device, and other equivalent features and methods are intended to be within the scope of the appended claims. In addition, various different aspects are described, and it should be understood that each described aspect can be implemented independently or in combination with one or more of the other described aspects.

Claims

1. A multi-mode antenna system, comprising: A printed circuit board; A first antenna, the first antenna being connected to the printed circuit board; And A second antenna, the second antenna being connected to the printed circuit board, the second antenna being out of phase with the first antenna by 90 degrees, wherein at least one of the first antenna and the second antenna comprises: An inverted F antenna; A first loop structure, the first loop structure being substantially aligned with the inverted F antenna; and A second loop structure, the second loop structure being located adjacent to the inverted F antenna, the second loop structure and the inverted F antenna sharing a connection point to the printed circuit board.

2. The multi-mode antenna system according to claim 1, wherein, The printed circuit board is a substantially circular printed circuit board.

3. The multi-mode antenna system according to claim 1, wherein, The inverted F antenna comprises: A post, the post being connected to the printed circuit board and extending radially outward from the printed circuit board; and An arm, the arm having an arc concentric with the printed circuit board.

4. The multi-mode antenna system according to claim 3, wherein, The first loop structure is located between the printed circuit board and the arm of the inverted F antenna.

5. The multi-mode antenna system according to claim 3, wherein, The length of the arm of the inverted F antenna is in the range of 16 mm to 18 mm.

6. The multi-mode antenna system according to claim 3, wherein, The second loop structure comprises: An additional post, the additional post being connected to the printed circuit board and extending radially outward from the printed circuit board; and A cross beam, the cross beam being connected to the post of the inverted F antenna and having an arc concentric with the printed circuit board.

7. The multi-mode antenna system according to claim 1, wherein, The inverted F antenna has an arm with an open end, the open end being in the range of 4 mm to 6 mm away from the printed circuit board.

8. The multi-mode antenna system according to claim 1, further comprising a decoupling structure, the decoupling structure being connected to the printed circuit board at a position between the first antenna and the second antenna.

9. The multi-mode antenna system according to claim 8, wherein, The decoupling structure comprises a T-shaped element, the T-shaped element having a central post and two arms substantially coplanar with the printed circuit board.

10. The multi-mode antenna system according to claim 9, wherein, One of the two arms of the T-shaped element radially overlaps a part of the second loop structure.

11. The multi-mode antenna system according to claim 9, wherein, The length of each arm of the T-shaped element is in the range of 12 mm to 14 mm.

12. The multi-mode antenna system according to claim 1, wherein, The inverted F antenna can operate as a quarter-wavelength monopole at a first low-frequency band frequency and as a three-quarter-wavelength monopole at a first high-frequency band frequency; The first loop structure can operate as a half-wavelength folded monopole at a second high-frequency band frequency; and The second loop structure can operate as a half-wavelength folded monopole at a third high-frequency band frequency.

13. The multi-mode antenna system according to claim 12, further comprising: A touch sensor, the touch sensor being located close to at least one of the first antenna and the second antenna, the touch sensor being operable to conduct current when the first loop structure operates as the half-wavelength folded monopole at the second high-frequency band frequency.

14. The multi-mode antenna system according to claim 12 further includes a decoupling structure, the decoupling structure being connected to the printed circuit board at a position between the first antenna and the second antenna, wherein, The decoupling structure comprises a T-shaped element, the T-shaped element being able to operate as a quarter-wavelength monopole at a second low-frequency band frequency in combination with the inverted F structure, wherein the inverted F structure operates as the quarter-wavelength monopole at the second low-frequency band frequency.

15. The multi-mode antenna system according to claim 14, wherein: The frequency of the first low-frequency band is 2.4 GHz; The frequency of the second low-frequency band is 2.73 GHz; The frequency of the first high-frequency band is 5.85 GHz; The frequency of the second high-frequency band is 5.15 GHz; and The frequency of the third high-frequency band is 7.6 GHz.

16. The multi-mode antenna system according to claim 1, wherein, The printed circuit board is coplanar with each of the first antenna and the second antenna.

17. The multi-mode antenna system according to claim 1 further includes a decoupling structure, the decoupling structure being connected to the printed circuit board at a position between the first antenna and the second antenna, wherein, The decoupling structure is out of phase by 45 degrees with each of the first antenna and the second antenna.

18. The multi-mode antenna system according to claim 1 further includes a decoupling structure, the decoupling structure being connected to the printed circuit board at a position between the first antenna and the second antenna, wherein, The first antenna and the second antenna combined with the decoupling structure can operate in multiple resonance modes between 2 GHz and 8 GHz.

19. An electronic device, comprising: A housing having a planar base; A printed circuit board located within the housing; A speaker assembly placed within the housing; A first antenna connected to the printed circuit board; And A second antenna connected to the printed circuit board, the second antenna being 90 degrees out of phase with the first antenna, wherein at least one of the first antenna and the second antenna includes: An inverted-F antenna; A first loop structure substantially aligned with the inverted-F antenna; and A second loop structure located adjacent to the inverted-F antenna, the second loop structure and the inverted-F antenna sharing a connection point to the printed circuit board.

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