Co-body antenna, measurement device, angle of arrival measurement method, and readable storage medium

Abstract

Embodiments of the present application provide a common antenna, a measuring device, an angle of arrival measurement method and a readable storage medium, and relate to the technical field of terminals. The common antenna comprises an antenna radiator, a first feeding unit, a second feeding unit and a decoupling unit; the length of the antenna radiator is between 0.25 lambda and 0.35 lambda, and lambda is the wavelength of a wireless signal to be measured; one end of the antenna radiator is connected with the first feeding unit to form a first antenna, the other end of the antenna radiator is connected with the second feeding unit to form a second antenna, and the middle position of the antenna radiator is grounded through the decoupling unit, and the decoupling unit comprises a decoupling capacitor; wherein the isolation degree of the first antenna and the second antenna is greater than a threshold value. The technical scheme provided by the embodiments of the present application can simultaneously realize the functions of two antennas through a small-size antenna radiator, not only occupies a smaller space, but also has better angle of arrival measurement accuracy, and can be applied to electronic devices with smaller internal space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of terminal, and in particular to a common antenna, a measuring device, an angle of arrival measurement method and a readable storage medium. BACKGROUND

[0002] Electronic devices can perform angle of arrival (AoA) measurement on wireless signals to determine the direction of the transmitting source of the wireless signals relative to the electronic devices, thereby realizing device positioning. Currently, electronic devices usually use at least two patch antennas with a spacing of 0.5λ to receive wireless signals, and determine the angle of arrival of the wireless signals according to the phase difference of the wireless signals received by the patch antennas. However, more patch antennas and larger antenna spacing occupy a larger space, which is difficult to apply to the increasingly narrow device interior. SUMMARY

[0003] The present application provides a common antenna, a measuring device, an angle of arrival measurement method and a readable storage medium, which solves the problem that the angle of arrival measurement antenna occupies a larger space in the prior art and is difficult to apply to the increasingly narrow device interior.

[0004] To achieve the above object, the present application adopts the following technical solutions:

[0005] In a first aspect, the present application provides a common antenna, comprising: an antenna radiator, a first feeding unit, a second feeding unit and a decoupling unit; the length of the antenna radiator is between 0.25λ and 0.35λ, and λ is the wavelength of the wireless signal to be measured; one end of the antenna radiator is connected with the first feeding unit to form a first antenna, and the other end is connected with the second feeding unit to form a second antenna, and the middle position of the antenna radiator is grounded through the decoupling unit, and the decoupling unit comprises a decoupling capacitor; wherein the isolation of the first antenna and the second antenna is greater than a threshold value.

[0006] The common antenna provided by the present application can realize the functions of two antennas at the same time through a small-size antenna radiator, which not only occupies much smaller space than two antennas in the prior art, but also has good angle of arrival measurement accuracy and can be applied to electronic devices with smaller internal space.

[0007] In some embodiments, the first feeding unit and / or the second feeding unit comprises a phase shift element. The phase shift element can change the phase of the wireless signal received by the antenna, so that the antenna presents different working states.

[0008] In some embodiments, the phase shift element comprises a phase shifter, a variable capacitor, a variable capacitor assembly, a variable inductor or a variable inductor assembly.

[0009] In some embodiments, the variable capacitance component comprises: a first sub-capacitance, a second sub-capacitance, and a switching switch; one end of the first sub-capacitance and the second sub-capacitance is connected to an end of the antenna radiator, and the other end is connected to the switching switch, and the capacitance values of the first sub-capacitance and the second sub-capacitance are fixed. The variable capacitance component has simple structure, low cost, and is easy to implement.

[0010] In some embodiments, the variable inductance component comprises: a first sub-inductance, a second sub-inductance, and a switching switch; one end of the first sub-inductance and the second sub-inductance is connected to an end of the antenna radiator, and the other end is connected to the switching switch, and the inductance values of the first sub-inductance and the second sub-inductance are fixed. The variable inductance component has simple structure, low cost, and is easy to implement.

[0011] In some embodiments, the threshold value is 10 dB.

[0012] In the second aspect, the embodiments of the present application provide a measurement device, comprising a common antenna and an angle of arrival measurement module, the common antenna is shown in the first aspect; the angle of arrival measurement module is configured to measure the angle of arrival of a wireless signal using the common antenna.

[0013] In some embodiments, the angle of arrival measurement module is configured to measure the angle of arrival of a wireless signal using the common antenna, comprising: measuring the angle of arrival of the wireless signal in K different working states of the common antenna respectively, obtaining K sets of angles of arrival, K≥2; wherein the working parameters of the phase shift elements in the common antenna are different in different working states, the phase shift elements comprise a first phase shift element of the first feeding unit, and / or a second phase shift element of the second feeding unit; and determining the angle of arrival of the wireless signal according to the K sets of angles of arrival.

[0014] It can be understood that in different working states, the common antenna has different corresponding relationships between phase difference and angle of arrival. Based on this, in the present embodiment, the measurement device can perform multiple angle of arrival measurements based on multiple sets of corresponding relationships between phase difference and angle of arrival presented by the common antenna, and determine the final angle of arrival according to multiple angles of arrival, which has high measurement accuracy.

[0015] In some embodiments, the measurement device further comprises a single antenna, and the angle of arrival measurement module is further configured to measure the angle of arrival of the wireless signal using the common antenna and the single antenna in K different working states of the common antenna, and obtain K sets of angles of arrival; wherein the working parameters of the phase shift elements in the common antenna are different in different working states; the phase shift elements comprise a first phase shift element of the first feeding unit, and / or a second phase shift element of the second feeding unit; and determining the angle of arrival of the wireless signal according to the K sets of angles of arrival. The measurement device provided in the present embodiment can combine the single antenna and the common antenna for use, so as to further improve the measurement accuracy of the angle of arrival.

[0016] In some embodiments, the angle of arrival measurement module is configured to determine the angle of arrival of the wireless signal according to the K sets of angles of arrival, including: determining an angle of arrival commonly included in the K sets of angles of arrival as the angle of arrival of the wireless signal.

[0017] In some embodiments, the single antenna is a frame antenna.

[0018] In some embodiments, the antenna spacing between the single antenna and the monostatic antenna is between 0.45λ and 0.55λ, and the angle of arrival of the wireless signal includes a horizontal angle and a pitch angle.

[0019] In a third aspect, an embodiment of the present application provides an angle of arrival measurement method, applied to a measurement device, the measurement device including a monostatic antenna as shown in the first aspect, the method including: measuring the angle of arrival of the wireless signal in K different working states of the monostatic antenna to obtain K sets of angles of arrival, K≥2; wherein the working parameters of the phase shift elements in different working states are different, the phase shift elements including a first phase shift element of a first feed unit and / or a second phase shift element of a second feed unit; and determining the angle of arrival of the wireless signal according to the K sets of angles of arrival.

[0020] The angle of arrival measurement method provided by the embodiment of the present application can fuse the measurement of the angle of arrival of the wireless signal in multiple different working states of the monostatic antenna, which helps to improve the measurement accuracy of the angle of arrival.

[0021] In some embodiments, the measurement device further includes a third antenna, and the method further includes: measuring the angle of arrival of the wireless signal using the monostatic antenna and the monostatic antenna in K different working states of the monostatic antenna to obtain K sets of angles of arrival; wherein the working parameters of the phase shift elements in the monostatic antenna in different working states are different, the phase shift elements including a first phase shift element of a first feed unit and / or a second phase shift element of a second feed unit; and determining the angle of arrival of the wireless signal according to the K sets of angles of arrival.

[0022] The angle of arrival measurement method provided by the embodiment of the present application can combine the monostatic antenna and the monostatic antenna, and fuse the measurement of the angle of arrival of the wireless signal in multiple different working states of the monostatic antenna, which helps to improve the measurement accuracy of the angle of arrival.

[0023] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, the computer readable storage medium storing a computer program, the computer program being executed by a processor to implement the angle of arrival measurement method as shown in the third aspect.

[0024] In a fifth aspect, an embodiment of the present application provides a chip, the chip including a processor and a memory, the memory storing a computer program, the computer program being executed by the processor to implement the angle of arrival measurement method as shown in the third aspect.

[0025] In a sixth aspect, an embodiment of the present application provides a computer program product, which stores a computer program. When the computer program is run by a processor, the computer program can realize the angle of arrival measurement method shown in the third aspect.

[0026] It can be understood that the beneficial effects of the fourth aspect to the sixth aspect can be referred to the related description in the first aspect to the third aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a schematic diagram of an angle of arrival measurement system provided by an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a schematic diagram of an angle of arrival measurement provided by an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a schematic diagram of a horizontal angle and a pitch angle provided by an embodiment of the present application;

[0030] Figure 4 FIG. 4 is a schematic diagram of a measurement device provided by an embodiment of the present application;

[0031] Figure 5 FIG. 5 is a structural schematic diagram of a corporate antenna provided by an embodiment of the present application;

[0032] Figure 6A FIG. 6 is a structural schematic diagram of a corporate antenna provided by an embodiment of the present application;

[0033] Figure 6B FIG. 7 is a structural schematic diagram of an antenna radiator provided by an embodiment of the present application;

[0034] Figure 7 FIG. 8 is a structural schematic diagram of a corporate antenna provided by another embodiment of the present application;

[0035] Figure 8 FIG. 9 is a structural schematic diagram of a corporate antenna provided by another embodiment of the present application;

[0036] Figure 9 FIG. 10 is an isolation degree schematic diagram of a corporate antenna provided by an embodiment of the present application;

[0037] Figure 10 FIG. 11 is an isolation degree schematic diagram of a corporate antenna provided by another embodiment of the present application;

[0038] Figure 11 FIG. 12 is a structural schematic diagram of a corporate antenna provided by another embodiment of the present application;

[0039] Figure 12is a schematic diagram of a common antenna provided by an embodiment of the present application in a measuring device;

[0040] Figure 13 is a schematic diagram of a common antenna provided by another embodiment of the present application in a measuring device;

[0041] Figure 14 is a schematic diagram of a measuring device provided by another embodiment of the present application;

[0042] Figure 15 is a schematic diagram of a phase difference of a wireless signal received by a common antenna provided by an embodiment of the present application;

[0043] Figure 16 is a schematic diagram of an angle of arrival measurement accuracy of a common antenna provided by an embodiment of the present application;

[0044] Figure 17 is a schematic diagram of an angle of arrival measurement method provided by an embodiment of the present application;

[0045] Figure 18 is a schematic diagram of an isolation degree of a first antenna and a second antenna provided by an embodiment of the present application;

[0046] Figure 19 is a schematic diagram of an antenna efficiency of a first antenna and a second antenna provided by an embodiment of the present application;

[0047] Figure 20 is a schematic diagram of a corresponding relationship between an angle of arrival and a phase difference of a wireless signal received by a common antenna provided by an embodiment of the present application;

[0048] Figure 21 is an angle of arrival measurement error of a common antenna in different working states provided by an embodiment of the present application;

[0049] Figure 22 is a phase and amplitude of a first antenna in different working states provided by an embodiment of the present application;

[0050] Figure 23 is a schematic flowchart of an angle of arrival measurement method provided by another embodiment of the present application;

[0051] Figure 24 is a schematic diagram of a fusion determination principle of an angle of arrival provided by another embodiment of the present application;

[0052] Figure 25 is a schematic diagram of an angle of arrival measurement accuracy of a common antenna provided by an embodiment of the present application;

[0053] Figure 26 is a schematic diagram of a cumulative distribution function of an angle of arrival measurement error provided by an embodiment of the present application;

[0054] Figure 27 FIG. 1 is a schematic diagram of an antenna distribution structure of a measurement device according to an embodiment of the present application;

[0055] Figure 28 FIG. 2 is a schematic diagram of isolation degrees among a first antenna, a second antenna and a third antenna according to an embodiment of the present application;

[0056] Figure 29 FIG. 3 is a schematic flowchart of an angle of arrival measurement method according to another embodiment of the present application;

[0057] Figure 30 FIG. 4 is a schematic diagram of a chip structure according to an embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solutions provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

[0059] It should be understood that, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone.

[0060] In the embodiments, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments, unless otherwise specified, the meaning of "multiple" is two or more.

[0061] The angle of arrival (AoA) is a key parameter in wireless positioning technology, which is used to represent the included angle between the direction of arrival of a wireless signal and the straight line where the angle of arrival measurement antenna is located. Through the angle of arrival measurement technology, the electronic device can locate the source device that transmits the wireless signal, or combine the position information of the source device to perform reverse positioning on the electronic device, which has a wide application prospect in the field of wireless positioning technology.

[0062] Figure 1 FIG. 1 is a schematic diagram of an angle of arrival measurement system according to an embodiment of the present application. Referring to FIG. 1, the angle of arrival measurement system includes a measurement device and a device to be measured, wherein the measurement device and the device to be measured support communication by using a wireless communication technology. Figure 1

[0063] ​In this embodiment, the measuring device and the device to be measured can be a mobile phone, a tablet computer, a smart home device (such as a smart television, a smart speaker, a sweeping robot, an air conditioner, etc.) with wireless transceiver function, a computer with wireless transceiver function, a smart television, a projector, a wearable device (such as a smart watch), a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), a router, or the like electronic device. The specific type of the electronic device is not limited in this embodiment of the present application.

[0064] The wireless communication technology can be wireless fidelity (WiFi), traditional Bluetooth (BT), Bluetooth low energy (BLE), ultra wide band (UWB), or radio frequency (RF) communication technology, etc. The specific type of the wireless communication technology is not limited in this embodiment of the present application.

[0065] The device to be measured is configured to transmit a wireless signal required for angle of arrival measurement. The wireless signal can be a measurement frame, a beacon frame, etc. Optionally, the device to be measured can transmit the wireless signal autonomously, or can transmit the wireless signal according to the instruction of the measuring device. The wireless signal can be a WiFi signal, a Bluetooth signal, a UWB signal, or an FR signal, etc. The specific type of the wireless signal is not limited in this embodiment of the present application.

[0066] The measuring device is configured to receive the wireless signal transmitted by the device to be measured through at least two antennas, and determine the angle of arrival of the wireless signal according to the phase difference Δφ of the wireless signal received by the at least two antennas. For example, the measuring device can calculate the angle of arrival of the wireless signal by using an angle of arrival calculation formula, or can determine the angle of arrival of the wireless signal according to the corresponding relationship between the phase difference and the angle of arrival.

[0067] It should be noted that the antenna in this embodiment refers to an antenna used for performing the angle of arrival measurement. It should be understood that although this embodiment does not show, the measurement device can include other antennas in addition to the above-mentioned antenna used for performing the angle of arrival measurement, such as an antenna for receiving satellite positioning signals, an antenna for receiving cellular signals, and the like. In addition, the embodiments of the present application do not limit the operating frequency band of the antenna, for example, it can be a WiFi frequency band of 2.4 GHz / 5 GHz, a Bluetooth frequency band of 2.4 GHz, or a UWB frequency band of 3.1-10.6 GHz, a 5 GHz new radio (NR) frequency band, and the like.

[0068] Figure 2 is an angle of arrival measurement schematic diagram provided by an embodiment of the present application. Referring to Figure 2 , the to-be-measured device transmits a wireless signal in the angle of arrival measurement process, and the measurement device receives the wireless signal using antenna 1 and antenna 2. For example, when the antenna 1 and the antenna 2 are ideal point source antennas, and the antenna radiation pattern of each point around the point source antenna tends to be spherical, the measurement device can determine the angle of arrival of the wireless signal according to the following formula (1).

[0069]

[0070] In formula (1), φ ant1 is the phase of the wireless signal received by the antenna 1 of the measurement device, φ ant2 is the phase of the wireless signal received by the antenna 2 of the measurement device, and then φ ant1 - φ ant2 is the phase difference of the wireless signal received by the antenna 1 and the antenna 2 of the measurement device. d is the distance between the antenna 1 and the antenna 2 of the measurement device, which is usually known. λ is the wavelength of the wireless signal, which is usually known. θ AoA is the specific value of the angle of arrival.

[0071] It should be noted that the antenna radiation pattern is used to describe the corresponding relationship between the electromagnetic wave energy radiated by the antenna and each position in space. The antenna radiation pattern is usually a three-dimensional structure centered on the antenna. It can be understood that for an ideal point source antenna, the electromagnetic wave energy radiated in each direction is the same, and uniformly decays at the same amplitude. Therefore, the antenna radiation pattern of the ideal point source antenna tends to be spherical.

[0072] The angle of arrival includes a horizontal angle of arrival (referred to as a horizontal angle θ) and a pitch angle of arrival (referred to as a pitch angle ). Referring to Figure 3 , the horizontal angle θ is the included angle between the direction of arrival of the wireless signal and the straight line on which the horizontal angle measurement antenna is located, and the pitch angle is the included angle between the direction of arrival of the wireless signal and the straight line on which the elevation angle measurement antenna is located.

[0073] It should be noted that the horizontal angle measurement antenna and the elevation angle measurement antenna are preset in the measurement device. Taking the measurement device as a rectangular electronic device such as a mobile phone, a tablet computer, and the like, when the measurement device is in a portrait display mode and performs the angle of arrival measurement, the antenna substantially parallel to the short side of the measurement device is the horizontal angle measurement antenna, and the antenna substantially parallel to the long side of the measurement device is the elevation angle measurement antenna. When the measurement device is in a landscape display mode and performs the angle of arrival measurement, the antenna substantially parallel to the long side of the measurement device is the horizontal angle measurement antenna, and the antenna substantially parallel to the short side of the measurement device is the elevation angle measurement antenna.

[0074] Figure 4 is a schematic diagram of a measurement device provided by an embodiment of the present application. Referring to Figure 4 , the measurement device includes an antenna A and an antenna B. The antenna A and the antenna B are patch antennas, and the straight line on which the antenna A and the antenna B are located is parallel to the short side of the measurement device (such as a mobile phone). In addition, in order to ensure the accuracy of the angle of arrival measurement, the antenna spacing D of the antenna A and the antenna B is generally required to be approximately 0.5λ. The antenna spacing D of the patch antenna refers to the distance between the center positions of the antenna radiators. When the measurement device is in a portrait display mode and performs the angle of arrival measurement, the antenna A and the antenna B are used to measure the horizontal angle of the wireless signal. When the measurement device is in a landscape display mode and performs the angle of arrival measurement, the antenna A and the antenna B are used to measure the elevation angle of the wireless signal.

[0075] Since the antenna radiator of the patch antenna itself has a large size, and the antenna spacing D is also required to be approximately 0.5λ, the space occupied by the multiple antennas as a whole is large. For example, referring to Figure 4 , taking the length of the antenna radiator of the antenna A and the antenna B as approximately 0.4λ and the width as approximately 0.35λ, the length of the electronic device occupied by the antenna A and the antenna B as a whole is approximately 0.85λ, and the width is approximately 0.35λ. Taking the wireless signal to be measured as a 6.5GHz UWB signal, the wavelength λ of the wireless signal is 46mm, so the length of the antenna radiator of a single patch antenna is approximately 18.4mm, and the width is approximately 16.1mm. The length of the double antennas as a whole is 39.1mm, and the width is approximately 16.1mm.

[0076] It can be seen that in the angle of arrival measurement technology, the space occupied by the multiple antennas as a whole is large, which not only causes resource waste, but also is not conducive to use in devices with increasingly small internal space.

[0077] To this end, the embodiment of the present application provides a common-body antenna, which can realize the functions of two antennas simultaneously through a small-size antenna radiator, and has a smaller occupied space than two antennas in the prior art and better angle of arrival measurement accuracy, and can be applied to electronic devices with small internal space.

[0078] It should be noted that the embodiment refers to an antenna using a single antenna radiator as a single-body antenna, and refers to multiple antennas (such as two antennas, three antennas, etc.) using a single antenna radiator as a whole as a common-body antenna, and each antenna in the common-body antenna can operate independently and has less influence on each other.

[0079] Referring to Figure 5 The common-body antenna provided by the embodiment of the present application includes an antenna radiator, a first feeding unit, a second feeding unit, and a decoupling unit. The length of the antenna radiator is between 0.25λ and 0.35λ, and λ is the wavelength of a wireless signal to be measured. One end of the antenna radiator is connected with the first feeding unit to form a first antenna, and the other end of the antenna radiator is connected with the second feeding unit to form a second antenna. The middle position of the antenna radiator is grounded through the decoupling unit, and the decoupling unit includes a decoupling capacitor. The isolation of the first antenna and the second antenna is greater than a threshold value. Optionally, the first feeding unit and / or the second feeding unit includes a phase-shifting element.

[0080] The common-body antenna provided by the embodiment of the present application will be described in detail in combination with specific examples.

[0081] Figure 6A is a structural schematic diagram of a common-body antenna provided by an embodiment of the present application. Referring to Figure 6A The common-body antenna includes an antenna radiator, a first feeding unit, a second feeding unit, and a decoupling unit.

[0082] The antenna radiator is used to receive a wireless signal to be measured in the process of angle of arrival measurement, is a metal patch structure, and can be arranged on the side of a rear cover of a measurement device facing a screen.

[0083] For example, referring to Figure 6B The antenna radiator is a rectangular structure, the length of which is between 0.25λ and 0.35λ, and the width of which is between 0.1λ and 0.15λ, where λ is the wavelength of the wireless signal to be measured. Taking a 6.5 GHz UWB signal as an example, the wavelength λ of the wireless signal is 46 mm, and therefore the length of the antenna radiator is between 11.5 mm and 16.1 mm, and the width of the antenna radiator is between 4.6 mm and 6.9 mm. It can be seen that the size of the antenna radiator is small.

[0084] In addition, in this embodiment, the antenna spacing of the common antenna is equal to the length of the antenna radiator, that is, the antenna spacing of the common antenna is between 0.25λ and 0.35λ, which is much smaller than the spacing of 0.5λ between two patch antennas in the prior art.

[0085] A first feeding unit is connected to one end of the antenna radiator to form a first antenna. Optionally, the first feeding unit includes a first phase-shifting unit, a first feed point F1, and the required connecting lines, with the first phase-shifting unit located between the antenna radiator and the first feed point F1. The first feed point F1 is used to feed power to the first antenna and activate the left-handed antenna mode of the first antenna; the first phase-shifting unit is used to change the phase of the wireless signal received by the first antenna.

[0086] The second feed unit is connected to the other end of the antenna radiator to form a second antenna. Optionally, the second feed unit includes a second phase-shifting unit, a second feed point F2, and the required connecting lines, with the second phase-shifting unit located between the antenna radiator and the second feed point F2. The second feed point F2 is used to feed the second antenna and activate its left-handed antenna mode, while the second phase-shifting unit is used to change the phase of the radio signal received by the second antenna.

[0087] In addition, the first phase-shifting unit and the second phase-shifting unit can also be used to adjust the impedance of the first antenna and the second antenna so that their impedances are matched, thereby improving antenna efficiency.

[0088] Optionally, in the first and second power supply units, the phase-shifting element can be a phase shifter, a variable capacitor, a variable capacitor assembly, a variable inductor, or a variable inductor assembly, etc. This embodiment does not limit the specific type of the phase-shifting element. The phase shifter, variable capacitor, and variable inductor can adjust their operating parameters (such as phase shift value, capacitance value, or inductance value) according to the control of the measuring equipment. In the variable capacitor assembly and variable inductor assembly, multiple capacitors or multiple inductors need to be set, and a switching switch is used to actually select the element connected to the power supply unit, thereby achieving the adjustment of the operating parameters. The specific setting of the phase-shifting element is shown below.

[0089] For example, see Figure 7 The shared antenna shown in (a) has a first feed unit including a first phase shifter ψ1 and a second feed unit including a second phase shifter ψ2. During the angle of arrival measurement, ψ1 and ψ2 are specifically set with phase shift values ​​according to the control of the measuring equipment, thereby adjusting the phase information fed back to the measuring equipment by the antenna.

[0090] Or see Figure 7The shared antenna shown in (b) has a first feed unit including a first variable capacitor C1 and a second feed unit including a second variable capacitor C2. During the angle of arrival measurement, C1 and C2 are specifically set with their capacitance values ​​according to the control of the measuring equipment, thereby adjusting the phase information fed back to the measuring equipment by the antenna.

[0091] Or see Figure 7 The shared antenna shown in (c) has a first feed unit including a first variable inductor L1 and a second feed unit including a second variable inductor L2. During the angle of arrival measurement, L1 and L2 are specifically set with inductance values ​​according to the instructions of the measuring equipment, thereby adjusting the phase information fed back to the measuring equipment by the antenna.

[0092] Or see Figure 8 The shared antenna shown in (a) has a first feeding unit including a variable capacitor assembly C1 and a second feeding unit including a variable capacitor C2. The variable capacitor assembly C1 includes a first sub-capacitor C... 1-1 Second sub-capacitor C 1-2 and switching switch, first sub-capacitor C 1-1 Second sub-capacitor C 1-2 The capacitance value is fixed, and one end is connected to the end of the antenna radiator, while the other end is connected to a switching switch. During the angle of arrival measurement, the switching switch switches the sub-capacitors according to the control of the measuring equipment, selecting the sub-capacitor actually connected to the first feed unit, thereby adjusting the phase information fed back to the measuring equipment by the antenna.

[0093] Alternatively, see Figure 8 The shared antenna shown in (b) has a first feeding unit including a variable inductor component L1 and a second feeding unit including a variable inductor L2. The variable inductor component L1 includes a first sub-inductor L... 1-1 Second sub-inductor L 1-2 And switching, first sub-inductor L 1-1 Second sub-inductor L 1-2 The inductance value is fixed, with one end connected to the end of the antenna radiator and the other end connected to a switching switch. During the angle of arrival measurement, the switching switch switches the sub-inductors according to the instructions of the measuring equipment, selecting the sub-inductor actually connected to the first feed unit, thereby adjusting the phase information fed back to the measuring equipment by the antenna.

[0094] A decoupling unit, connected to the midpoint of the antenna radiator and grounded (e.g., connected to a ground plane), is used to decouple the first and second antennas. Optionally, the decoupling unit includes a decoupling capacitor C. d And the required connection lines.

[0095] It should be noted that decoupling the first and second antennas refers to increasing the isolation between them, thereby reducing the mutual interference when they operate simultaneously. Isolation represents the degree of coupling between the two antennas. The greater the isolation, the lower the coupling between the two antennas, and the less mutual interference they will have during operation.

[0096] In this shared antenna, although the length of the antenna radiator is only 0.25λ to 0.35λ, i.e., the antenna spacing is only 0.25λ to 0.35λ, the isolation between the first and second antennas in the shared antenna can be maintained above a threshold due to the decoupling capacitor in the decoupling unit. For example, the threshold is greater than or equal to 10dB, such as between 10 and 15dB, for example, 10dB, 13dB, 15dB, etc.

[0097] The wireless signal to be measured is a UWB signal with a frequency of 6.5 GHz and a wavelength of λ = 46 mm. The first variable capacitor C1 = 0.4 pF in the first feed unit of the shared antenna, the second variable capacitor C2 = 0.4 pF in the second feed unit, and the decoupling capacitor C... d Taking 0.3pF as an example, the common antennas corresponding to antenna radiators with lengths between 0.25λ and 0.35λ all have good isolation.

[0098] For example, see Figure 9 As shown, for a common antenna with an antenna radiator length of 0.28λ≈13mm and a width of 0.1λ≈5mm, when the decoupling unit does not include the decoupling capacitor C... d At this time, the isolation between the first and second antennas in the shared antenna is shown by the dashed line. Its isolation is as low as 7dB when receiving 6.5GHz UWB signals, indicating poor isolation. Furthermore, when the decoupling unit of the shared antenna includes a decoupling capacitor C... d When the isolation of the first and second antennas in the shared antenna is shown by the solid line, the isolation is greater than 13.5dB when receiving 6.5GHz UWB signals, which is good and has been significantly improved.

[0099] For example, see Figure 10 As shown, for a common antenna with a radiating length of 0.33λ≈15mm and a width of 0.1λ≈5mm, when the decoupling element of the common antenna does not include the decoupling capacitor C... d When the isolation between the first and second antennas in the shared antenna is shown by the dashed line, its isolation is as low as 6.5dB when receiving 6.5GHz UWB signals, indicating poor isolation. Furthermore, when the decoupling unit of the shared antenna includes a decoupling capacitor C... dAt that time, the isolation of the first and second antennas in the shared antenna is shown by the solid line. When receiving 6.5GHz UWB signals, the isolation is greater than 11dB, which is good and has been significantly improved.

[0100] It can be seen that the decoupling capacitor C in the decoupling unit d The setting can significantly improve the isolation between the first and second antennas in the shared antenna system, making their isolation greater than the threshold, which helps to improve the measurement accuracy of the angle of arrival.

[0101] In the aforementioned shared antenna, both the first and second feed units include a phase-shifting element; however, in some embodiments, see [reference needed]. Figure 11 As shown, in this shared antenna, the first feed unit may include a first phase-shifting element, while the second feed unit may not include a second phase-shifting element; or, the first feed unit may not include a first phase-shifting element, while the second feed unit may include a second phase-shifting element.

[0102] In addition, although not shown in the embodiments of this application, the first power supply unit, the second power supply unit, and the decoupling unit in the above embodiments may also include other required components, such as resistors, other capacitors, other inductors, etc., depending on the requirements. This embodiment does not impose specific limitations on this.

[0103] Figure 12 and Figure 13 This is a schematic diagram illustrating the arrangement of the shared antenna in a measuring device according to an embodiment of this application. See also... Figure 12 As shown, the entire shared antenna can be mounted on the substrate of the measurement equipment (such as a printed circuit board, PCB), with the ground plane below the substrate. The first feed unit, second feed unit, and decoupling unit in the shared antenna can be grounded through the ground plane. See also... Figure 13 As shown, since the antenna radiator is usually set on the side of the back cover of the measuring equipment facing the substrate, and the first feed point F1, the second feed point F2 and the ground point G are usually set on the substrate, the phase shifting element and the decoupling capacitor can be set in the gap between the substrate and the back cover, so that the entire antenna maintains a compact structure and further reduces the space occupied by the measuring equipment.

[0104] In summary, the shared antenna provided in this application not only occupies less space and can be applied to electronic devices with limited internal space, but also has good isolation and can be used for angle of arrival measurement.

[0105] The following section provides a detailed description of the angle of arrival measurement of the shared antenna provided in the embodiments of this application, using the measuring equipment.

[0106] Figure 14is a structural schematic diagram of a measuring device provided by another embodiment of the present application. Referring to Figure 14 The measuring device includes a common antenna and an angle of arrival measurement module.

[0107] The common antenna includes a first antenna and a second antenna sharing a same antenna radiator, and is used to receive a wireless signal sent by a device under test in an angle of arrival measurement process, and its working state is adjustable. For details, refer to the foregoing description, which will not be repeated here.

[0108] It should be noted that, according to the different positions of the common antenna in the measuring device, the common antenna can be used to measure the horizontal angle θ, or can be used to measure the elevation angle For example, when the antenna radiator in the common antenna is parallel to the shorter side of the mobile phone, and the mobile phone is in a portrait display mode, the common antenna can be used to measure the horizontal angle of the wireless signal. Or, when the antenna radiator in the common antenna is parallel to the longer side of the mobile phone, and the mobile phone is in a portrait display mode, the common antenna can be used to measure the elevation angle of the wireless signal.

[0109] The angle of arrival measurement module is connected to the feed point F1 of the first antenna and the feed point F2 of the second antenna, and uses the first antenna and the second antenna to measure the angle of arrival of the wireless signal. In the present embodiment, the angle of arrival measurement module can be a UWB module, a WiFi module, a Bluetooth module, or an FR module, etc., and the present embodiment does not limit this.

[0110] Optionally, in the present embodiment, the angle of arrival measurement module also needs to control the first antenna and / or the second antenna to adjust the working parameters of the phase shift element thereof. For example, when the phase shift element is a variable capacitor or a variable capacitor assembly, the angle of arrival measurement module controls to adjust the capacitance value thereof; or, when the phase shift element is a variable inductor or a variable inductor assembly, the angle of arrival measurement module controls to adjust the inductance value thereof.

[0111] When the measuring device measures the angle of arrival through the common antenna, the first antenna and the second antenna in the common antenna are used to work simultaneously to receive the wireless signal, and the phase difference of the wireless signal received by the first antenna and the second antenna is determined. Subsequently, according to the preset corresponding relationship between the phase difference and the angle of arrival, the angle of arrival of the wireless signal is determined. It can be understood that the higher the one-to-one correspondence between the phase difference and the angle of arrival, the higher the measurement accuracy of the angle of arrival. It should be noted that, in the common antenna provided by the present embodiment, due to the action of the decoupling capacitor C d in the decoupling unit, the common antenna has a good one-to-one correspondence between the phase difference of the wireless signal received and the angle of arrival, and thus has a good measurement accuracy of the angle of arrival.

[0112] Figure 15is a schematic diagram of phase difference of wireless signal received by the common-body antenna provided by an embodiment of the present application. Taking the wireless signal to be measured as a 6.5 GHz UWB signal, it can be seen from the diagram that, when the decoupling unit does not include the decoupling capacitor C d , in a larger range of angles of arrival, for example, in 0°-151°, 153°-166° and 168°-178°, the phase difference of the wireless signal does not change obviously, there are multiple angles of arrival corresponding to the same phase difference, and it is basically impossible to inversely deduce the angle of arrival by combining the phase difference and the preset corresponding relationship. When the decoupling unit includes the decoupling capacitor C d , it can be obviously seen that, in the angle range of 55°-180°, the phase difference basically presents a gradually decreasing change trend with the increase of the angle of arrival, and the phase difference and the angle of arrival basically exist a one-to-one corresponding relationship, and the angle of arrival can be inversely deduced by combining the phase difference and the preset corresponding relationship. Therefore, the decoupling capacitor C d in the decoupling unit can significantly improve the one-to-one correspondence between the phase difference and the angle of arrival, and help to improve the measurement accuracy of the angle of arrival.

[0113] Figure 16 is a schematic diagram of the measurement accuracy of the angle of arrival of the common-body antenna provided by an embodiment of the present application. It can be seen from the diagram that, when the decoupling unit does not include the decoupling capacitor C d , the measurement error of the angle of arrival is basically greater than 20°, and even as high as 50° in the range of 70°-100°, and the measurement accuracy is low. When the decoupling unit includes the decoupling capacitor C d , the measurement error of the angle of arrival is basically less than 10°, and the maximum measurement error in the range of 70°-100° is reduced from 50° to 25°, and the measurement accuracy of the angle of arrival is significantly improved.

[0114] In summary, since the decoupling capacitor C d is arranged in the common-body antenna, and the decoupling capacitor C d significantly improves the one-to-one correspondence between the phase difference and the angle of arrival of the wireless signal received by the common-body antenna, the common-body antenna has good measurement accuracy of the angle of arrival.

[0115] However, since the antenna spacing of the first antenna and the second antenna in the common-body antenna is only between 0.25λ and 0.35λ, which is much smaller than the ideal half wavelength 0.5λ, its measurement error is still not small enough in some angle ranges, for example Figure 16 in the range of 70°-100°. In order to further improve the measurement accuracy of the angle of arrival of the common-body antenna and reduce the measurement error, an embodiment of the present application also provides the following angle of arrival measurement method for the common-body antenna.

[0116] Figure 17is a schematic diagram of a method for measuring angle of arrival provided by an embodiment of the present application. The method is specifically performed by an angle of arrival measuring module in a measuring device, and specifically includes the following steps S1701-S1702.

[0117] S1701, in K different working states of the common antenna, the measuring device respectively measures the angle of arrival of the wireless signal using the common antenna, and obtains K sets of angles of arrival, K≥2.

[0118] The working parameters of the phase shift elements of the common antenna are different in different working states. For example, when the phase shift element is a phase shifter, the working parameter is the phase shift value; when the phase shift element is a variable inductance or a variable inductance component, the working parameter is the inductance value; when the phase shift element is a variable capacitor or a variable capacitor component, the working parameter is the capacitance value.

[0119] In one example, when the first phase shift element C1 of the common antenna is a first variable capacitor and the second phase shift element C2 is a second variable capacitor, in the first working state, C1=0.4pF, C2=0.4pF; in the second working state, C1=0.3pF, C2=0.4pF.

[0120] Since the phase shift element can change the phase of the wireless signal received by the antenna, and the phase shift elements in different working parameters have different phase change capabilities, the common antenna in K different working states respectively corresponds to K sets of corresponding relationships between phase differences and angles of arrival. Based on this, when measuring the angle of arrival of the wireless signal, the measuring device can obtain K sets of angles of arrival according to the K sets of corresponding relationships.

[0121] S1702, the angle of arrival measuring module determines the angle of arrival of the wireless signal according to the K sets of angles of arrival.

[0122] In this embodiment, the measuring device can determine the angle of arrival of the wireless signal according to the N sets of angles of arrival by means of asynchronous fusion. Wherein, asynchronous fusion refers to determining a target parameter according to data determined at different times, for example, in this embodiment, the angle of arrival of the wireless signal is determined according to the N sets of angles of arrival determined at different times.

[0123] Through the method provided by the embodiment of the present application, the measuring device can perform multiple angle of arrival measurements based on the multiple corresponding relationships between phase differences and angles of arrival presented by the common antenna, and determine the final angle of arrival according to the multiple angle of arrival measurement results, which has high measurement accuracy.

[0124] Next, taking the wireless signal to be measured as a 6.5GHz UWB signal, taking the first phase shift element C1 of the common antenna as a first variable capacitor and the second phase shift element C2 as a second variable capacitor, and taking the decoupling capacitor C d= 0.3pF, and the length of the antenna radiator is equal to 0.28λ, the first working state and the second working state shown in Table 1 are combined to specifically describe the angle of arrival measurement method provided by the embodiment of the present application.

[0125] Table 1

[0126] Working state [C1] [C2] First working state 0.4 pF 0.4 pF Second working state 0.3 pF 0.4 pF

[0127] First, the isolation, the antenna efficiency, the corresponding relationship between the angle of arrival and the phase difference, the measurement error in different working states, and the phase and amplitude of the first antenna when switching the working parameters are described for the first working state and the second working state of the common antenna.

[0128] (1) Isolation

[0129] Figure 18 is a schematic diagram of the isolation of the first antenna and the second antenna provided by the embodiment of the present application. The solid line in the figure is the isolation of the first antenna and the second antenna in the first working state, and the dashed line in the figure is the isolation of the first antenna and the second antenna in the second working state. It can be seen that when the to-be-measured signal is a 6.5GHz UWB signal, in the frequency range of 6.25-6.75GHz, the isolation of the first antenna and the second antenna in the first working state and the second working state is basically greater than 13dB, and has good isolation.

[0130] (2) Antenna efficiency

[0131] Figure 19 is a schematic diagram of the antenna efficiency of the first antenna and the second antenna provided by the embodiment of the present application, in which the horizontal coordinate is the frequency and the vertical coordinate is the antenna efficiency. The solid line in the figure is the antenna efficiency of the first antenna and the second antenna in the first working state, and the dashed line is the antenna efficiency of the first antenna and the second antenna in the second working state. It can be seen from the figure that in the frequency range of 6.25-6.75GHz, whether in the first working state or in the second working state, the antenna efficiency of the first antenna and the second antenna is greater than -4.5dB, and the antenna efficiency is high.

[0132] In the embodiment, the antenna efficiency is used to represent the energy conversion efficiency of the antenna, that is, the ratio of the radiation power Pr (that is, the power of the part of the electromagnetic wave effectively converted) to the input power Pin, and the value is always less than 1. The higher the antenna efficiency, the higher the utilization and conversion rate of energy.

[0133] (3) Corresponding relationship between angle of arrival and phase difference

[0134] Figure 20is a schematic diagram of the correspondence between the angle of arrival and the phase difference of the wireless signal received by the common antenna provided in the embodiments of the present application. The diagram shows the first correspondence between the angle of arrival and the phase difference of the wireless signal received by the common antenna when the common antenna is in the first working state, i.e., curve 1, and the second correspondence between the angle of arrival and the phase difference of the wireless signal received by the common antenna when the common antenna is in the second working state, i.e., curve 2. As can be seen from the diagram, the curve 2 in the second working state is shifted to the right by about 8° relative to the curve 1 in the first working state, so that the same phase difference corresponds to different angles of arrival in the first working state and the second working state. Based on this, the measuring device can measure the angle of arrival of the wireless signal when the common antenna is in the first working state and the second working state, respectively, and determine the angle of arrival based on the multiple measurement results to improve the accuracy of the angle of arrival measurement.

[0135] (4) Measurement error in different working states

[0136] Figure 21 is the angle of arrival measurement error of the common antenna in different working states provided in the embodiments of the present application. As can be seen from (a) in Figure 21 , in the first working state, the measurement error of the common antenna for the wireless signal with an angle of arrival of 70°-90° is large, with an error of more than 10°, and the maximum measurement error is as high as 25°; while the measurement error in the remaining angle of arrival measurement range is small, basically within 10°. As can be seen from (b) in Figure 21 , in the second working state, the measurement error of the common antenna for the wireless signal with an angle of arrival of 70°-90° is significantly reduced, with an error of less than 10°, and the maximum measurement error is reduced to 15°; while the measurement error in the remaining angle of arrival measurement range is small, basically also within 10°. Therefore, combining the first working state and the second working state for angle of arrival measurement can compensate for the short board of angle of arrival measurement and reduce the measurement error.

[0137] (5) Phase and amplitude of the first antenna

[0138] Since the capacitance of the first antenna in the common antenna changes in the first working state and the second working state, the phase and amplitude of the first antenna in different working states also change accordingly.

[0139] Figure 22This figure shows the phase and amplitude of the first antenna provided in this application under different operating states. Solid lines in the figure represent the correspondence between phase and frequency, while dashed lines represent the correspondence between amplitude and frequency. As can be seen from the figure, relative to the first operating state, the phase and amplitude of the first antenna shift to the right in the second operating state. This results in different phases of the wireless signals received by the first antenna under different operating states, and consequently, different phase differences between the first and second antennas under different operating states.

[0140] Based on the fact that the first antenna and the second antenna have good isolation, antenna efficiency, and measurement error in both the first and second operating states, and that the first and second operating states correspond to different angles of arrival and phase differences, and that the first antenna can generate different measurement errors in the first and second operating states, the measuring device uses the shared antenna to measure the angle of arrival using the following method.

[0141] Figure 23 This is a schematic flowchart of an angle of arrival measurement method provided in another embodiment of this application. The method is specifically executed by the angle of arrival measurement module in the measuring device, and specifically includes the following steps S2301 to S2305.

[0142] S2301, the measuring equipment controls the shared antenna to adjust to the first working state.

[0143] For example, the measuring device controls C1 = 0.4pF and C2 = 0.4pF, so that the common antenna enters the first working state.

[0144] S2302, the measuring device, in the first operating state of the shared antenna, uses the shared antenna to measure the first set of angles of arrival of the wireless signal.

[0145] In some embodiments, for the first operating state of the shared antenna, the measuring device has a preset first correspondence between the phase difference of the wireless signals received by the first antenna and the second antenna and the angle of arrival. Based on this, the measuring device uses the first antenna and the second antenna to synchronously receive the wireless signals used for angle of arrival measurement, and determines the first phase difference of the wireless signals received by the first antenna and the second antenna. Subsequently, the measuring device can determine the angle of arrival of the wireless signal by looking up the first correspondence based on the first phase difference.

[0146] by Figure 20 Taking the first correspondence as an example, when the first phase difference is 2°, the first set of arrival angles can be determined according to the first correspondence, including 90° and 100°.

[0147] S2303, the measuring equipment controls the shared antenna to switch from the first working state to the second working state.

[0148] For example, the measuring device controls C1 = 0.3pF and C2 = 0.4pF, causing the common antenna to enter the second working state.

[0149] S2304, The measuring device, in the second operating state of the shared antenna, uses the shared antenna to measure the second set of angles of arrival of the wireless signal.

[0150] In some embodiments, for the second operating state of the shared antenna, the measuring device has a pre-defined second correspondence between the phase difference of the wireless signals received by the first and second antennas and the angle of arrival. Based on this, the measuring device uses the first and second antennas to synchronously receive the wireless signals used for angle of arrival measurement, and determines the second phase difference of the wireless signals received by the first and second antennas. Subsequently, the measuring device determines the angle of arrival of the wireless signal by looking up the second correspondence based on the second phase difference.

[0151] by Figure 20 Taking the second correspondence as an example, when the second phase difference is 2.3°, the corresponding second set of arrival angles can be determined to include 90° and 95° according to the second correspondence.

[0152] S2305, the measuring device determines the angle of arrival of the wireless signal based on the first set of angles of arrival and the second set of angles of arrival.

[0153] Taking the first set of angles of arrival including 90° and 100°, and the second set of angles of arrival including 90° and 95° as an example, see [link / reference]. Figure 24 As shown, the measuring device determines the angle of arrival of the wireless signal as the same value of 90° from the first set of angles of arrival and the second set of angles of arrival. Alternatively, the measuring device can determine the angle of arrival of the wireless signal based on the first set of angles of arrival and the second set of angles of arrival using an asynchronous fusion algorithm. This embodiment will not be elaborated upon further.

[0154] It should be noted that during the angle of arrival measurement process, the measuring device can repeatedly execute the above S2301 to S2305 to measure the angle of arrival of the wireless signal in real time, thereby enabling real-time positioning of the device under test.

[0155] The measurement accuracy of the angle of arrival measurement method provided in the above embodiments will be described below.

[0156] Figure 25This is a schematic diagram illustrating the angle-of-arrival (AHA) measurement accuracy of the shared antenna provided in this application embodiment. The diagram shows the measurement error (curve 3) when measuring the AHA in the combined first and second operating states (i.e., the combined state). As can be seen from the diagram, using this AHA measurement method, the AHA measurement error remains essentially below 10° within the AHA range of 10° to 180°. Furthermore, within the AHA range of 70° to 90°, compared to the measurement error when using only the first operating state (curve 1), the AHA measurement error of this embodiment is significantly reduced, with the maximum measurement error reduced by 10°, currently only 15°. Therefore, the AHA measurement method provided in this application embodiment has high measurement accuracy.

[0157] Figure 26 This is a schematic diagram of the cumulative distribution function (CDF) of the angle of arrival measurement error provided in the embodiments of this application. The horizontal axis represents the angle of arrival measurement error x, and the vertical axis represents the probability that the angle of arrival measurement error falls within (0, x]. As shown in the figure, within the angle of arrival measurement range of 0–180°, when the measuring device performs angle of arrival measurement only in the first operating state of the shared antenna, the probability of the measurement error being within 10° is only 35%, and the probability of the measurement error being within 15° is only 55%. However, when the angle of arrival measurement is performed by fusing the first and second operating states, the probability of the measurement error being within 10° increases to 68%, and the probability of the measurement error being within 15° reaches as high as 95%. It can be seen that the method for performing angle of arrival measurement by fusing the first and second operating states provided in the embodiments of this application can significantly reduce measurement error and improve measurement accuracy.

[0158] In the process of angle of arrival measurement, in order to achieve accurate positioning of the device under test, in some embodiments, the measuring device can measure both the horizontal angle θ and the pitch angle. Therefore, the measuring device can combine the shared antenna provided in the above embodiments with other individual antennas to measure the horizontal angle θ and the elevation angle. Measurement.

[0159] The following description uses the above-mentioned combined antenna and single-unit frame antenna as an example to illustrate the measurement equipment and angle of arrival measurement method provided in the embodiments of this application.

[0160] Figure 27 This is a schematic diagram of the antenna distribution structure of a measuring device provided in one embodiment of this application. See also... Figure 27 As shown, the measuring device includes a common antenna, a frame antenna, and an angle of arrival measurement module.

[0161] The common antenna includes a first antenna and a second antenna sharing a same antenna radiator, and is used for receiving a wireless signal sent by a device under test in an angle of arrival measurement process. For details, refer to the foregoing description, which will not be repeated here. In this embodiment, the antenna radiator in the common antenna is parallel to a longer side of the device under test (e.g., a mobile phone).

[0162] The bezel antenna, also referred to as a third antenna in this embodiment, includes an antenna radiator, a grounding point G, and a third feeding point F3. The antenna radiator is part of a metal bezel of the electronic device, is located between two insulating breakpoints on the metal bezel, and is used for transmitting / receiving a wireless signal. In addition, the antenna radiator is connected to the grounding point G through a grounding line, and the grounding point G is connected to a grounding surface of a PCB of the electronic device. The antenna radiator is also connected to the third feeding point F3 through a feeding line, and a radio frequency signal source of the device under test feeds the antenna radiator through the third feeding point F3.

[0163] The angle of arrival measurement module is connected to the feeding point F1 of the first antenna, the feeding point F2 of the second antenna, and the feeding point F3 of the third antenna, and uses the first antenna, the second antenna, and the third antenna to jointly measure the angle of arrival of the wireless signal. In this embodiment, the angle of arrival measurement module can be a UWB module, a WiFi module, a Bluetooth module, or an FR module, and this embodiment does not limit the angle of arrival measurement module.

[0164] In this embodiment, the angle of arrival measurement module also needs to control the first antenna and / or the second antenna to adjust the phase-shifting element thereof. For example, when the phase-shifting element is a variable capacitor or a variable capacitor assembly, the angle of arrival measurement module controls to adjust the capacitance value thereof; or when the phase-shifting element is a variable inductor or a variable inductor assembly, the angle of arrival measurement module controls to adjust the inductance value thereof.

[0165] Next, the angle of arrival measurement method provided in this embodiment is exemplarily described based on the device under test in the foregoing example of this application, the wireless signal to be measured is a 6.5 GHz UWB signal, the first phase-shifting element in the common antenna is a first variable capacitor C1, the second phase-shifting element is a second variable capacitor C2, the decoupling capacitor C is 0.3 pF, and the length of the antenna radiator is equal to 0.28λ, in combination with the first working state and the second working state shown in Table 1. d

[0166] Table 2

[0167]

[0168]

[0169] First, the isolation degrees between the first antenna, the second antenna, and the third antenna of the common antenna in the first working state and the second working state are described. ​

[0170] Figure 28 is a schematic diagram of isolation degrees between the first antenna, the second antenna and the third antenna provided by an embodiment of the present application. In the diagram, Figure 28 (a) in the diagram is a schematic diagram of isolation degrees between the antennas in the first working state, Figure 28 (b) in the diagram is a schematic diagram of isolation degrees between the antennas in the second working state. In the diagram, S12 is an isolation degree curve between the first antenna and the second antenna, S13 is an isolation degree curve between the first antenna and the third antenna, and S23 is an isolation degree curve between the second antenna and the third antenna. As can be seen from the diagram, for a UWB signal of 6.5 GHz, in the frequency range of 6.25-6.75 GHz, the isolation degrees between the antennas are greater than 13 dB in both the first working state and the second working state, and the responses between the antennas are small.

[0171] Based on the good isolation degrees and antenna efficiencies of the antennas in the first working state and the second working state of the measurement device, the arrival angle of a wireless signal is measured in combination with the first working state and the second working state.

[0172] Figure 29 is a schematic flowchart of an arrival angle measurement method provided by another embodiment of the present application. The method is controlled by an arrival angle measurement module of a measurement device and includes the following steps S2901-S2905.

[0173] S2901, the measurement device controls the common antenna to switch to the first working state.

[0174] In this embodiment, based on the working parameters shown in Table 2, the measurement device arrival angle measurement module controls C1=0.3 pF and C2=0.3 pF to make the common antenna enter the first working state. The switching mode of the working state is specifically described above and will not be described here again.

[0175] S2902, in the first working state, the measurement device uses the first antenna and the second antenna in the common antenna and the third antenna in the single antenna to measure a first group of arrival angles of a wireless signal.

[0176] Taking the relative position relationship between the antennas shown in Table 3 as an example, the measurement device can determine the horizontal angle according to the phase information of the wireless signals received by the first antenna and the third antenna or the second antenna and the third antenna, and determine the pitch angle according to the phase information of the wireless signals received by the first antenna and the second antenna or the second antenna and the third antenna. Figure 27 Table 3

[0177]

[0178] ​

[0179] For example, using the first antenna and the third antenna to determine the horizontal angle, referring to Table 4, for the first working state of the common-body antenna, the measurement device is preset with a corresponding relationship A1 between the phase difference of the wireless signal received by the first antenna and the third antenna and the horizontal angle. Based on this, the measurement device determines the phase difference of the first antenna and the third antenna The corresponding relationship A1 is searched to determine the horizontal angle of the wireless signal. It can be understood that since the phase difference and the horizontal angle are not one-to-one corresponding, the horizontal angle can have one or more.

[0180] For example, using the first antenna and the second antenna to determine the pitch angle, referring to Table 4, for the second working state of the common-body antenna, the measurement device is preset with a corresponding relationship B1 between the phase difference of the wireless signal received by the first antenna and the second antenna and the pitch angle. Based on this, the measurement device determines the phase difference of the first antenna and the second antenna The corresponding relationship B1 is searched to determine the pitch angle of the wireless signal. Similarly, since the phase difference and the pitch angle are not one-to-one corresponding, the pitch angle can have one or more.

[0181] Table 4

[0182]

[0183] S2903, the measurement device controls the common-body antenna to switch from the first working state to the second working state.

[0184] In this embodiment, based on the working parameters shown in Table 2, the measurement device reaches the angle measurement module to control C1=0.2pF and C2=0.3pF, so that the common-body antenna enters the second working state.

[0185] S2904, in the second working state, the measurement device uses the first antenna and the second antenna in the common-body antenna, and the third antenna of the single body, to measure a second group of angles of arrival of the wireless signal.

[0186] For example, referring to Table 4, for the second working state of the common-body antenna, the measurement device is preset with a corresponding relationship A2 between the phase difference of the wireless signal received by the first antenna and the third antenna and the horizontal angle. Based on this, the measurement device determines the phase difference of the first antenna and the third antenna The corresponding relationship A2 is searched to determine the horizontal angle of the wireless signal. The horizontal angle can have one or more.

[0187] Similarly, referring to Table 4, for the second working state of the common antenna, the measurement device has a preset corresponding relationship B2 between the phase difference of the wireless signal received by the first antenna and the second antenna and the elevation angle. Based on this, the measurement device determines the phase difference of the first antenna and the second antenna according to the second working state The corresponding relationship B2 is searched, and the elevation angle of the wireless signal is determined. There can be one or more elevation angles.

[0188] S2905, the measurement device measures the angle of arrival of the wireless signal according to the first group of angles of arrival and the second group of angles of arrival.

[0189] In this embodiment, the measurement device determines the horizontal angle of the wireless signal according to the horizontal angle 1 in the first group of angles of arrival and the horizontal angle 2 in the second group of angles of arrival. For example, the horizontal angle 1 includes 50° and 60°, and the horizontal angle 2 includes 60° and 70°, and the angle of arrival measurement module determines 60° as the horizontal angle of the wireless signal.

[0190] In addition, the measurement device determines the elevation angle of the wireless signal according to the elevation angle 1 in the first group of angles of arrival and the elevation angle 2 in the second group of angles of arrival. For example, the elevation angle 1 includes 30° and 50°, and the elevation angle 2 includes 30°, and the angle of arrival measurement module determines 30° as the elevation angle of the wireless signal.

[0191] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0192] The embodiments of the present application also provide a chip, referring to Figure 30 The chip includes a processor and a memory, and the memory stores a computer program, which is executed by the processor to implement the angle of arrival measurement method in the above embodiments.

[0193] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the angle of arrival measurement method provided in the above embodiments.

[0194] The embodiments of the present application also provide a computer program product, which includes a computer program, and when the computer program is run by an electronic device, the electronic device implements the angle of arrival measurement method provided in the above embodiments.

[0195] It should be appreciated that the processor referred to in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0196] It should also be understood that the memory referred to in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0197] In the embodiments provided in the present application, the division of each framework or module is only a logical functional division, and when actually implemented, there can be another division manner, for example, a plurality of frameworks or modules can be combined or integrated into another system, or some features can be ignored or not executed.

[0198] In addition, each functional module in each embodiment of the present application can be integrated in one processing module, or each module can be physically present alone, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software functional module.

[0199] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0200] In the present application, the reference to "one embodiment" or "some embodiments" means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in further some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "include but are not limited to", unless otherwise specifically emphasized.

[0201] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A corporate antenna, comprising: The antenna radiator, the first feeding unit, the second feeding unit and the decoupling unit are included. The length of the antenna radiator is between 0.25λ and 0.35λ, and λ is the wavelength of a wireless signal to be measured. One end of the antenna radiator is connected with the first feeding unit to form a first antenna, and the other end is connected with the second feeding unit to form a second antenna, and the middle position of the antenna radiator is grounded through the decoupling unit, and the decoupling unit includes a decoupling capacitor. The isolation of the first antenna and the second antenna is greater than a threshold value. The first feeding unit and / or the second feeding unit includes a phase shift element.

2. The corporate antenna of claim 1, wherein, The phase shift element includes a phase shifter, a variable capacitor, a variable capacitor assembly, a variable inductor or a variable inductor assembly.

3. The corporate antenna of claim 2, wherein, The variable capacitor assembly includes a first sub-capacitor, a second sub-capacitor and a switching switch, one end of the first sub-capacitor and the second sub-capacitor is connected with the end of the antenna radiator, and the other end is connected with the switching switch, and the capacitance of the first sub-capacitor and the second sub-capacitor is fixed.

4. The corporate antenna of claim 3, wherein, The variable inductor assembly includes a first sub-inductor, a second sub-inductor and a switching switch, one end of the first sub-inductor and the second sub-inductor is connected with the end of the antenna radiator, and the other end is connected with the switching switch, and the inductance of the first sub-inductor and the second sub-inductor is fixed.

5. The corporate antenna of claim 3, wherein, The threshold value is 10dB.

6. The corporate antenna according to any one of claims 1 to 5, wherein, The common antenna and an angle of arrival measurement module are included, 7. A measuring device, characterized in that The common antenna is the common antenna as claimed in any one of claims 1 to 6; The angle of arrival measurement module is configured to measure the angle of arrival of the wireless signal using the common antenna. The angle of arrival measurement module is configured to measure the angle of arrival of the wireless signal using the common antenna, including:

8. The measuring device of claim 7, wherein, The angle of arrival measurement module is configured to, measure the angle of arrival of the wireless signal using the common antenna in K different working states of the common antenna, and obtain K sets of angles of arrival, K≥2; wherein the working parameters of the phase shift elements in the common antenna are different in different working states, and the phase shift elements include a first phase shift element of the first feeding unit and / or a second phase shift element of the second feeding unit; determine the angle of arrival of the wireless signal according to the K sets of angles of arrival. The measurement device further includes a single antenna, 9. The measuring device according to claim 7 or 8, characterized in that The angle of arrival measurement module is further configured to, measure the angle of arrival of the wireless signal using the common antenna and the single antenna in K different working states of the common antenna, and obtain K sets of angles of arrival; wherein the working parameters of the phase shift elements in the common antenna are different in different working states; and the phase shift elements include a first phase shift element of the first feeding unit and / or a second phase shift element of the second feeding unit; determine the angle of arrival of the wireless signal according to the K sets of angles of arrival. The angle of arrival measurement module is configured to determine the angle of arrival of the wireless signal according to the K sets of angles of arrival, including:

10. The measuring device of claim 8, wherein, The angle of arrival measurement module is configured to determine the angle of arrival of the wireless signal according to the K sets of angles of arrival, including: The single antenna is a bezel antenna.

11. The measuring device of claim 9, wherein, ​ 12. The measuring device of claim 9, wherein, The inter-antenna distance of the monopole antenna and the corporate antenna is between 0.45λ and 0.55λ, and the angle of arrival of the wireless signal includes a horizontal angle and a pitch angle.

13. A method of angle of arrival measurement, characterized by, The method is applied to a measuring device, and the measuring device comprises the corporate antenna according to any one of claims 2 to 6. The angle of arrival of the wireless signal is measured in K different working states of the corporate antenna respectively, and K sets of angles of arrival are obtained, K≥2; wherein the working parameters of the phase shift elements are different in different working states, the phase shift elements include the first phase shift element of the first feeding unit and / or the second phase shift element of the second feeding unit; The angle of arrival of the wireless signal is determined according to the K sets of angles of arrival.

14. The method of claim 13, wherein, The measuring device further comprises a monopole antenna, and the method further comprises: The angle of arrival of the wireless signal is measured in K different working states of the corporate antenna using the corporate antenna and the monopole antenna, and K sets of angles of arrival are obtained; wherein the working parameters of the phase shift elements in the corporate antenna are different in different working states, the phase shift elements include the first phase shift element of the first feeding unit and / or the second phase shift element of the second feeding unit; The angle of arrival of the wireless signal is determined according to the K sets of angles of arrival.

15. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the angle of arrival measurement method according to claim 13 or 14.

16. A chip, characterized by The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the angle of arrival measurement method according to claim 13 or 14.

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