Common antenna, measuring equipment, arrival angle measuring method and readable storage medium

Abstract

The embodiment of the invention provides a common antenna, measuring equipment, an arrival angle measuring method and a readable storage medium, and relates to the technical field of terminals. The common antenna comprises an antenna radiator, a first feed unit, a second feed unit and a decoupling unit, the length of the antenna radiator ranges from 0.25 lambda to 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 feed unit to form a first antenna, the other end of the antenna radiator is connected with the second feed unit to form a second antenna, 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. According to the technical scheme provided by the embodiment of the invention, the functions of two antennas can be realized at the same time through a small-size antenna radiator, the occupied space is relatively small, the arrival angle measurement precision is relatively good, and the antenna radiator can be applied to electronic equipment with relatively small internal space.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a co-body antenna, a measurement device, an arrival angle measurement method and a readable storage medium. Background Art

[0002] Electronic devices can measure the angle of arrival (AoA) of wireless signals, thereby determining the direction of the transmitter of the wireless signal relative to the electronic device and achieving device positioning. Currently, electronic devices usually use at least two patch antennas with an antenna spacing of 0.5λ to receive wireless signals, and determine the angle of arrival of the wireless signal based on the phase difference of the wireless signals received by these patch antennas. However, more patch antennas and larger antenna spacing occupy more space, making it difficult to apply to the increasingly small interiors of devices. Summary of the invention

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

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In a first aspect, an embodiment of 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, λ being the wavelength of the wireless signal to be measured; one end of the antenna radiator is connected to the first feeding unit to form a first antenna, and the other end is connected to 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; wherein the isolation between the first antenna and the second antenna is greater than a threshold value.

[0006] The co-body antenna provided in the embodiment of the present application can simultaneously realize the functions of two antennas through a small-sized antenna radiator. It not only occupies a much smaller space than the space occupied by two antennas in the prior art, but also has better arrival angle 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 includes a phase shifting element. The phase shifting 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 shifting element includes a phase shifter, a variable capacitor, a variable capacitor component, a variable inductor, or a variable inductor component.

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

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

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

[0012] In a second aspect, an embodiment of the present application provides a measurement device, including a co-body antenna and an arrival angle measurement module. The co-body antenna is as shown in the first aspect above; the arrival angle measurement module is used to measure the arrival angle of a wireless signal using the co-body antenna.

[0013] In some embodiments, the angle of arrival measurement module is used to measure the angle of arrival of a wireless signal using a co-body antenna, including: measuring the angle of arrival of the wireless signal in K different working states of the co-body antenna respectively to obtain K groups of angles of arrival, K≥2; wherein the phase shift element in the co-body antenna has different working parameters in different working states, and the phase shift element includes 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 based on the K groups of angles of arrival.

[0014] It can be understood that under different working conditions, the co-body antenna has different corresponding relationships between phase difference and arrival angle. Based on this, in this embodiment, the measurement device can perform multiple arrival angle measurements based on multiple groups of corresponding relationships between phase difference and arrival angle presented by the co-body antenna, and comprehensively determine the final arrival angle based on multiple arrival angles, with high measurement accuracy.

[0015] In some embodiments, the measuring device further includes a single antenna, and the arrival angle measurement module is further used to use the common antenna and the single antenna to measure the arrival angle of the wireless signal in K different working states of the common antenna to obtain K groups of arrival angles; wherein the phase shift element in the common antenna has different working parameters in different working states; the phase shift element includes a first phase shift element of the first feeding unit, and / or a second phase shift element of the second feeding unit; and, based on the K groups of arrival angles, determine the arrival angle of the wireless signal. The measuring device provided in this embodiment can use a single antenna and a common antenna in combination to further improve the measurement accuracy of the arrival angle.

[0016] In some embodiments, the arrival angle measurement module is used to determine the arrival angle of the wireless signal based on K groups of arrival angles, including: determining the arrival angle commonly included in the K groups of arrival angles as the arrival angle 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 shared antenna is between 0.45λ and 0.55λ, and the arrival angle of the wireless signal includes a horizontal angle and an elevation angle.

[0019] In a third aspect, an embodiment of the present application provides an arrival angle measurement method, which is applied to a measuring device, the measuring device including the co-body antenna as shown in the first aspect above, the method including: measuring the arrival angle of the wireless signal in K different working states of the co-body antenna respectively, and obtaining K groups of arrival angles, K≥2; wherein the working parameters of the phase shifter are different in different working states, and the phase shifter includes a first phase shifter of the first feeding unit, and / or a second phase shifter of the second feeding unit; and, determining the arrival angle of the wireless signal according to the K groups of arrival angles.

[0020] The arrival angle measurement method provided in the embodiment of the present application can integrate the arrival angle measurements of wireless signals under multiple different working states of the common antenna, which helps to improve the measurement accuracy of the arrival angle.

[0021] In some embodiments, the measuring device also includes a third antenna, and the method also includes: under K different working states of the co-body antenna, using the co-body antenna and the single antenna to measure the angle of arrival of the wireless signal to obtain K groups of angles of arrival; wherein the phase shifting element in the co-body antenna has different working parameters under different working states, and the phase shifting element includes a first phase shifting element of the first feeding unit, and / or a second phase shifting element of the second feeding unit; and, based on the K groups of angles of arrival, determining the angle of arrival of the wireless signal.

[0022] The arrival angle measurement method provided in the embodiment of the present application can combine a single antenna with a shared antenna, and integrate the arrival angle measurements of wireless signals under multiple different working states of the shared antenna, which helps to improve the measurement accuracy of the arrival angle.

[0023] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the arrival angle measurement method shown in the third aspect above is implemented.

[0024] In a fifth aspect, an embodiment of the present application provides a chip, which includes a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the arrival angle measurement method shown in the third aspect above is implemented.

[0025] In a sixth aspect, an embodiment of the present application provides a computer program product, in which a computer program is stored, and when the computer program is executed on a processor, the arrival angle measurement method shown in the third aspect above can be implemented.

[0026] It can be understood that the beneficial effects of the fourth to sixth aspects mentioned above can be found in the relevant descriptions of the first to third aspects mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

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

[0036] Fig. 9 is a schematic diagram of the isolation of a common antenna provided by an embodiment of the present application;

[0037] Fig.10 is a schematic diagram of isolation of a common antenna provided by another embodiment of the present application;

[0038] Fig.11 is a structural schematic diagram of a common antenna provided by another embodiment of the present application;

[0039] Fig.12is a schematic diagram of the arrangement of a common antenna in a measurement device provided by an embodiment of the present application;

[0040] Fig.13 is a schematic diagram of the arrangement of a common antenna in a measurement device provided by another embodiment of the present application;

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

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

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

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

[0045] Fig.18 is a schematic diagram of the isolation between the first antenna and the second antenna provided in an embodiment of the present application;

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

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

[0048] Fig.21 is the arrival angle measurement error of the common antenna provided in the embodiment of the present application under different working conditions;

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

[0050] Fig.23 is a schematic flow chart of an arrival angle measurement method provided by another embodiment of the present application;

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

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

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

[0054] Fig. 27 is a schematic diagram of the antenna distribution structure of a measuring device provided by an embodiment of the present application;

[0055] Fig.28 is a schematic diagram of the isolation between the first antenna, the second antenna and the third antenna provided in an embodiment of the present application;

[0056] Fig.29 is a schematic flow chart of an arrival angle measurement method provided by another embodiment of the present application;

[0057] Fig.30 It is a schematic diagram of the structure of the chip provided in the embodiment of the present application. DETAILED DESCRIPTION

[0058] The technical solution provided in the embodiments of the present application is 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" in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0060] In this embodiment, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "plurality" means two or more.

[0061] The angle of arrival (AoA) is a key parameter in wireless positioning technology, which is used to indicate the angle between the direction of the wireless signal and the straight line where the angle of arrival measurement antenna is located. Through the angle of arrival measurement technology, electronic devices can locate the source device that transmits the wireless signal, or reversely locate the electronic device based on the location information of the source device, which has broad application prospects in the field of wireless positioning technology.

[0062] Figure 1 Schematic diagram of the arrival angle measurement system provided in the embodiment of the present application. Figure 1 As shown, the arrival angle measurement system includes a measuring device and a device to be tested, wherein the measuring device and the device to be tested support communication using wireless communication technology.

[0063] In this embodiment, the measuring device and the device to be tested can be a mobile phone, a tablet computer (Pad), a smart home device with wireless transceiver function (such as a smart TV, a smart speaker, a sweeping robot, an air conditioner, etc.), a computer with wireless transceiver function, a smart TV, 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 and other electronic devices. The embodiment of the present application does not limit its specific type.

[0064] The wireless communication technology may be wireless fidelity (WiFi), traditional Bluetooth (BT), low energy Bluetooth (BLE), ultra wide band (UWB) or radio frequency (RF) communication technology, and the embodiments of the present application are not limited thereto.

[0065] The device under test is used to transmit the wireless signal required for measurement during the angle of arrival measurement process. The wireless signal can be a measurement frame, a beacon frame, etc. Optionally, the device under test can transmit the wireless signal autonomously or according to the instruction of the measuring device. The wireless signal can be a WiFi signal, a Bluetooth signal, a UWB signal, or a FR signal, etc., which is not limited in the embodiments of the present application.

[0066] A measuring device is used to receive a wireless signal transmitted by a device under test through at least two antennas, and determine the angle of arrival of the wireless signal according to a phase difference Δφ of the wireless signal received by the at least two antennas. Exemplarily, the measuring device can use an angle of arrival calculation formula to calculate the angle of arrival of the wireless signal, 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 for measuring the angle of arrival. It should be understood that, although not shown in this embodiment, the measuring device may include other antennas in addition to the above-mentioned antenna for measuring the angle of arrival, such as an antenna for receiving satellite positioning signals, an antenna for receiving cellular signals, etc. In addition, the embodiment of the present application does not limit the working frequency band of the antenna. For example, it can be a 2.4GHz / 5GHz WiFi band, a 2.4GHz Bluetooth band, or a 3.1-10.6GHz UWB band, a 5GHz new radio (NR) band, etc.

[0068] Figure 2 FIG. 1 is a schematic diagram of angle of arrival measurement provided by an embodiment of the present application. Figure 2 As shown, taking the device under test transmitting a wireless signal during the arrival angle measurement process and taking the measuring device using antenna 1 and antenna 2 to receive the wireless signal as an example, when antenna 1 and antenna 2 are ideal point source antennas, and the antenna radiation field patterns of each point around the point source antenna are close to a sphere, the measuring device can determine the arrival angle 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 antenna 1 of the measurement device, φ ant2 is the phase of the wireless signal received by antenna 2 of the measurement device, then φ ant1 -φ ant2 It is the phase difference between the wireless signals received by antenna 1 and antenna 2 of the measuring device. d is the distance between antenna 1 and antenna 2 of the measuring 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 arrival angle.

[0071] It should be noted that antenna radiation patterns are used to describe the correspondence between the electromagnetic wave energy radiated by the antenna and each position in space. Antenna radiation patterns are usually three-dimensional structures centered on the antenna. It can be understood that for an ideal point source antenna, the electromagnetic wave energy radiated is the same in all directions and is uniformly attenuated with the same amplitude. Therefore, the antenna radiation pattern of an ideal point source antenna is close to a spherical shape.

[0072] The arrival angle includes the horizontal arrival angle (abbreviated as horizontal angle θ) and the elevation arrival angle (abbreviated as elevation angle ). Among them, see Figure 3 As shown in the figure, the horizontal angle θ is the angle between the incoming wave direction of the wireless signal and the straight line where the horizontal angle measurement antenna is located, and the pitch angle The angle between the direction of the wireless signal and the elevation angle of the straight line where the antenna is located.

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

[0074] Figure 4 is a schematic diagram of a measuring device provided by an embodiment of the present application. Figure 4 As shown, the measuring device includes antenna A and antenna B. Antenna A and antenna B are both patch antennas, and the straight line where they are located is parallel to the short side of the measuring device (such as a mobile phone). In addition, in order to ensure the accuracy of the angle of arrival measurement, it is usually necessary to ensure that the antenna spacing D between antenna A and antenna B is ≈ 0.5λ. Among them, the antenna spacing D of the patch antenna refers to the distance between the center positions of the antenna radiators. When the measuring device displays the picture in portrait mode and performs angle of arrival measurement, antenna A and antenna B are used to measure the horizontal angle of the wireless signal. When the measuring device displays the picture in landscape mode and performs angle of arrival measurement, antenna A and antenna B are used to measure the pitch angle of the wireless signal.

[0075] Since the antenna radiator of the patch antenna is relatively large in size and the antenna spacing D≈0.5λ needs to be maintained, the space occupied by multiple antennas is relatively large. Figure 4 As shown, taking the antenna radiator of antenna A and antenna B as an example, the length of antenna A and antenna B is about 0.4λ and the width is about 0.35λ. The length of antenna A and antenna B as a whole in the electronic device is about 0.85λ and the width is about 0.35λ. Taking the wireless signal to be measured as a 6.5GHz UWB signal as an example, the wavelength of the wireless signal is λ=46mm. Therefore, the length of the antenna radiator of a single patch antenna is about 18.4mm and the width is about 16.1mm. The length occupied by the dual antenna as a whole reaches 39.1mm and the width is about 16.1mm.

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

[0077] To this end, an embodiment of the present application provides a co-body antenna, which can simultaneously realize the functions of two antennas through a small-sized antenna radiator. Not only does it occupy a much smaller space than the space occupied by two antennas in the prior art, but it also has better arrival angle measurement accuracy and can be applied to electronic devices with smaller internal space.

[0078] It should be noted that in this embodiment, an antenna that uses a single antenna radiator is referred to as a single antenna, and multiple antennas (such as two antennas, three antennas, etc.) that share an antenna radiator are referred to as a common antenna as a whole. Each antenna in the common antenna can operate independently and have little impact on each other.

[0079] See also Figure 5 As shown, the co-body antenna provided in an 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, where λ is the wavelength of the wireless signal to be measured. One end of the antenna radiator is connected to the first feeding unit to form a first antenna, and the other end is connected to the second feeding unit to form a second antenna. The middle position of the antenna radiator is grounded through a decoupling unit, and the decoupling unit includes a decoupling capacitor. The isolation between the first antenna and the second antenna is greater than a threshold. Optionally, the first feeding unit and / or the second feeding unit includes a phase shifting element.

[0080] The following describes in detail the shared antenna provided in the embodiment of the present application with reference to specific examples.

[0081] Fig. 6A is a schematic diagram of the structure of a common antenna provided by an embodiment of the present application. Fig. 6A As shown, the common 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 the wireless signal to be measured during the arrival angle measurement process. It is a metal patch structure and can be set on the side of the rear cover of the measuring device facing the screen.

[0083] For example, see Figure 6B As shown, the antenna radiator is a rectangular structure, with a length between 0.25λ and 0.35λ and a width between 0.1λ and 0.15λ, where λ is the wavelength of the wireless signal to be measured. For example, the wireless signal to be measured is a 6.5GHz UWB signal, and the wavelength of the wireless signal is λ=46mm. Therefore, the length of the antenna radiator is between 11.5 and 16.1mm, and the width is between 4.6 and 6.9mm. 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] The first feeding unit is connected to one end of the antenna radiator to form the first antenna. Optionally, the first feeding unit includes a first phase shifting unit, a first feeding point F1 and a required connecting line, and the first phase shifting unit is located between the antenna radiator and the first feeding point F1. The first feeding point F1 is used to feed the first antenna and excite the left-hand 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 feeding unit is connected to the other end of the antenna radiator to form a second antenna. Optionally, the second feeding unit includes a second phase shifting unit, a second feeding point F2 and a required connecting line, and the second phase shifting unit is located between the antenna radiator and the second feeding point F2. The second feeding point F2 is used to feed the second antenna and excite the left-hand antenna mode of the second antenna, and the second phase shifting unit is used to change the phase of the wireless signal received by the second antenna.

[0087] In addition, the first phase shifting unit and the second phase shifting unit may also be used to adjust the impedance of the first antenna and the second antenna so that the impedances of the two antennas match, thereby improving antenna efficiency.

[0088] Optionally, in the first feed unit and the second feed unit, the phase shifting element may be a phase shifter, a variable capacitor, a variable capacitor assembly, a variable inductor or a variable inductor assembly, etc., and the present embodiment does not limit the specific type of the phase shifting element. Among them, the phase shifter, the variable capacitor and the variable inductor themselves can adjust the working parameters (such as phase shift value, capacitance value or inductance value) according to the control of the measuring device. In the variable capacitor assembly and the variable inductor assembly, it is necessary to set a plurality of capacitors or a plurality of inductors, and to switch the switch to actually select the element connected to the feed unit, so as to adjust the working parameters. The setting of the phase shifting element is specifically shown as follows.

[0089] For example, see Figure 7 In the co-body antenna shown in (a), the first feeding unit includes a first phase shifter ψ1, and the second feeding unit includes a second phase shifter ψ2. During the arrival angle measurement process, ψ1 and ψ2 specifically set the phase shift value according to the control of the measurement device, thereby adjusting the phase information fed back to the measurement device by the antenna.

[0090] Alternatively, see Figure 7In the common antenna shown in (b), the first feeding unit includes a first variable capacitor C1, and the second feeding unit includes a second variable capacitor C2. During the arrival angle measurement process, C1 and C2 specifically set the capacitance values ​​according to the control of the measuring device, thereby adjusting the phase information fed back by the antenna to the measuring device.

[0091] Alternatively, see Figure 7 In the common antenna shown in (c), the first feeding unit includes a first variable inductor L1, and the second feeding unit includes a second variable inductor L2. During the arrival angle measurement process, L1 and L2 specifically set the inductance value according to the instruction of the measuring device, and then adjust the phase information fed back by the antenna to the measuring device.

[0092] Alternatively, see Figure 8 In the common antenna shown in (a), the first feeding unit includes a variable capacitance component C1, and the second feeding unit includes a variable capacitance C2. The variable capacitance component C1 includes a first sub-capacitor C 1-1 , the second sub-capacitor C 1-2 and switch, the first sub-capacitor C 1-1 and the second sub-capacitor C 1-2 The capacitance value is fixed, and one end is connected to the end of the antenna radiator, and the other end is connected to the switch. During the arrival angle measurement process, the switch switches the sub-capacitor according to the control of the measuring device, selects the sub-capacitor actually connected to the first feeding unit, and then adjusts the phase information fed back by the antenna to the measuring device.

[0093] Alternatively, see Figure 8 In the common antenna shown in (b), the first feeding unit includes a variable inductor component L1, and the second feeding unit includes a variable inductor L2. The variable inductor component L1 includes a first sub-inductor L 1-1 , the second sub-inductor L 1-2 and the switching switch, the first sub-inductor L 1-1 and the second sub-inductor L 1-2 The inductance value is fixed, and one end is connected to the end of the antenna radiator, and the other end is connected to the switch. During the arrival angle measurement process, the switch switches the sub-inductor according to the instruction of the measuring device, selects the sub-inductor actually connected to the first feeding unit, and then adjusts the phase information fed back by the antenna to the measuring device.

[0094] The decoupling unit is connected to the middle position of the antenna radiator and is grounded (eg, connected to a ground plane), and is used to decouple the first antenna from the second antenna. Optionally, the decoupling unit includes a decoupling capacitor C d and the required connecting lines.

[0095] It should be noted that decoupling the first antenna and the second antenna means improving the isolation between the first antenna and the second antenna, and reducing the mutual influence between the first antenna and the second antenna when they work simultaneously. The isolation is used to indicate the degree of coupling between the two antennas. The greater the isolation, the lower the degree of coupling between the two antennas, and the less mutual influence between the two antennas during operation.

[0096] In the shared antenna, although the length of the antenna radiator is only 0.25λ~0.35λ, that is, the antenna spacing is only 0.25λ~0.35λ, due to the effect of the decoupling capacitor in the decoupling unit, the isolation between the first antenna and the second antenna in the shared antenna can be kept greater than the threshold. Exemplarily, the threshold is greater than or equal to 10dB, for example, between 10 and 15dB, such as 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, and the first variable capacitor C1 of the first feeding unit in the common antenna is 0.4 pF, the second variable capacitor C2 of the second feeding unit is 0.4 pF, and the decoupling capacitor C d =0.3pF as an example, the common antenna corresponding to the antenna radiator with a length of 0.25λ~0.35λ has good isolation.

[0098] For example, see Fig. 9 As shown, for a common antenna with a 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 When the decoupling unit of the co-body antenna includes a decoupling capacitor C d When receiving 6.5 GHz UWB signals, the isolation between the first antenna and the second antenna in the common antenna is shown as the solid line. When receiving 6.5 GHz UWB signals, the isolation is greater than 13.5 dB, the isolation is good, and has been significantly improved.

[0099] For example, see Fig.10 As shown, for a common antenna with a radiator length of 0.33λ≈15mm and a width of 0.1λ≈5mm, when the decoupling unit of the common antenna does not include the decoupling capacitor C d When the decoupling unit of the co-body antenna includes a decoupling capacitor C dWhen receiving 6.5 GHz UWB signals, the isolation between the first antenna and the second antenna in the common antenna is shown as the solid line. When receiving 6.5 GHz UWB signals, the isolation is greater than 11 dB, the isolation is good, and it 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 antenna and the second antenna in the common antenna, so that the isolation is greater than the threshold, which helps to improve the measurement accuracy of the arrival angle.

[0101] In the above-mentioned co-body antenna, the first feeding unit and the second feeding unit each include a phase shifting element. However, in some embodiments, see Fig.11 As shown, in the co-body antenna, the first feeding unit may include the first phase shifting element, while the second feeding unit may not include the second phase shifting element; or the first feeding unit may not include the first phase shifting element, while the second feeding unit may include the second phase shifting element.

[0102] In addition, although not shown in the embodiments of the present application, the first feeding unit, the second feeding unit and the decoupling unit in the above-mentioned embodiments may also include other required elements, such as resistors, other capacitors, other inductors, etc., which are specifically configured according to requirements, and this embodiment does not impose specific restrictions on this.

[0103] Fig.12 and Fig.13 Schematic diagram of the configuration of the common antenna in the measurement device provided in the embodiment of the present application. Fig.12 As shown, the whole body antenna can be set on the substrate of the measuring device (such as a printed circuit board (PCB)), and the lower part of the substrate is a ground plane. The first feeding unit, the second feeding unit and the decoupling unit in the body antenna can be grounded through the ground plane. In addition, see Fig.13 As shown, since the antenna radiator is usually arranged on the side of the back cover of the measuring device facing the substrate, and the first feeding point F1, the second feeding point F2 and the grounding point G are usually arranged on the substrate, the phase shifting element and the decoupling capacitor can be arranged in the gap between the substrate and the back cover, so that the entire common antenna maintains a compact structure, further reducing the internal space occupied by the measuring device.

[0104] In summary, the co-body antenna provided in the embodiment of the present application not only occupies a small space and can be applied to electronic devices with a small internal space, but also has good isolation and can be used to measure the angle of arrival.

[0105] The following specifically describes the angle of arrival measurement of the co-body antenna provided in the embodiment of the present application in conjunction with the measurement equipment.

[0106] Fig.14FIG. 1 is a schematic diagram of a measuring device provided by another embodiment of the present application. Fig.14 As shown, the measurement device includes a co-body antenna and an arrival angle measurement module.

[0107] The co-body antenna includes a first antenna and a second antenna that share the same antenna radiator, and is used to receive the wireless signal sent by the device under test during the arrival angle measurement process, and the working state is adjustable. For details, please refer to the above description, which will not be repeated here.

[0108] It should be noted that, depending on the different locations of the antenna in the measurement equipment, it can be used to measure the horizontal angle θ or the elevation angle. For example, when the antenna radiator of the co-body antenna is parallel to the shorter side of the mobile phone and the mobile phone is displayed in portrait mode, the co-body antenna can be used to measure the horizontal angle of the wireless signal. Alternatively, when the antenna radiator of the co-body antenna is parallel to the longer side of the mobile phone and the mobile phone is displayed in portrait mode, the co-body antenna can be used to measure the elevation angle of the wireless signal.

[0109] The arrival angle measurement module connects 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 arrival angle of the wireless signal. In this embodiment, the arrival angle measurement module can be a UWB module, a WiFi module, a Bluetooth module, or a FR module, etc., which is not limited in this embodiment.

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

[0111] When the measuring device measures the angle of arrival through the co-body antenna, it first uses the first antenna and the second antenna in the co-body antenna to work simultaneously to receive the wireless signal, and determines the phase difference between the wireless signals received by the first antenna and the second antenna. Subsequently, the angle of arrival of the wireless signal is determined according to the preset correspondence between the phase difference and the angle of arrival. 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 is worth noting that in the co-body antenna provided in this embodiment, due to the decoupling capacitor C in the decoupling unit d Due to the effect of the phase difference and the arrival angle of the wireless signal received by the common antenna, there is a good one-to-one correspondence, so it has a good arrival angle measurement accuracy.

[0112] Fig.15FIG. 1 is a schematic diagram of the phase difference of the wireless signal received by the common antenna provided in one embodiment of the present application. Taking the wireless signal to be measured as a 6.5 GHz UWB signal as an example, it can be seen from the figure that when the decoupling unit does not include the decoupling capacitor C d When the phase difference of the wireless signal does not change significantly in a larger arrival angle range, such as 0° to 151°, 153° to 166°, and 168° to 178°, there are multiple arrival angles corresponding to the same phase difference, and it is basically impossible to reverse the arrival angle by combining the phase difference and the preset corresponding relationship. d It can be clearly seen that within the angle range of 55° to 180°, as the angle of arrival increases, the phase difference basically shows a trend of gradually decreasing, and there is basically a one-to-one correspondence between the phase difference and the angle of arrival. The angle of arrival can be inferred by combining the phase difference and the preset correspondence. d It can significantly improve the one-to-one correspondence between the phase difference and the arrival angle, which helps to improve the measurement accuracy of the arrival angle.

[0113] Fig.16 FIG. 1 is a schematic diagram of the arrival angle measurement accuracy of a common antenna provided by an embodiment of the present application. As can be seen from the figure, when the decoupling unit does not include the decoupling capacitor C d When the decoupling unit includes a decoupling capacitor C d When the angle of arrival is adjusted, the measurement error is basically less than 10°, and the maximum measurement error in the range of 70° to 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 is set in the common antenna d , and the decoupling capacitor C d The one-to-one correspondence between the phase difference and the arrival angle of the wireless signal received by the co-body antenna is significantly improved. Therefore, the co-body antenna has good arrival angle measurement accuracy.

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

[0116] Fig.1717 is a schematic diagram of an arrival angle measurement method provided by an embodiment of the present application. The method is specifically executed by an arrival angle measurement module in a measurement device, and specifically includes the following steps S1701 to S1702.

[0117] S1701, in K different working states of the shared antenna, the measuring device uses the shared antenna to measure the arrival angle of the wireless signal respectively to obtain K groups of arrival angles, K≥2.

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

[0119] In one example, when the first phase shifting element of the common body antenna is the first variable capacitor C1 and the second phase shifting element is the second variable capacitor C2, 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 element has different phase change capabilities under different working parameters, the common antenna has K groups of corresponding relationships between phase difference and arrival angle under K different working conditions. Based on this, when measuring the arrival angle of the wireless signal, the measuring device can obtain K groups of arrival angles according to the K groups of corresponding relationships.

[0121] S1702: The arrival angle measurement module determines the arrival angle of the wireless signal according to the K groups of arrival angles.

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

[0123] Through the method provided in the embodiment of the present application, the measuring device can perform multiple arrival angle measurements based on multiple sets of correspondences between the phase difference and the arrival angle presented by the common antenna, and comprehensively determine the final arrival angle based on the multiple arrival angle measurement results, with high measurement accuracy.

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

[0125] Table 1

[0126] Working status <![CDATA[C1]]> <![CDATA[C2]]> First working state 0.4pF 0.4pF Second working state 0.3pF 0.4pF

[0127] First, when the common antenna is in the first working state and the second working state respectively, the isolation between the first antenna and the second antenna in the common antenna, the antenna efficiency, the correspondence between the arrival angle 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 explained.

[0128] (1) Isolation

[0129] Fig.18 Schematic diagram of the isolation of the first antenna and the second antenna provided in 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 dotted 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 signal to be measured is a 6.5GHz UWB signal, within the frequency range of 6.25 to 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, with good isolation.

[0130] (2) Antenna efficiency

[0131] Fig.19 It is a schematic diagram of the antenna efficiency of the first antenna and the second antenna provided in the embodiment of the present application, wherein the horizontal axis is the frequency and the vertical axis 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 dotted 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 to 6.75 GHz, 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 -4.5 dB, and the antenna efficiency is relatively high.

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

[0133] (3) Correspondence between arrival angle and phase difference

[0134] Fig. 20It is a schematic diagram of the correspondence between the angle of arrival and the phase difference of the wireless signal received by the co-body antenna provided in an embodiment of the present application. The figure shows the first correspondence between the angle of arrival and the phase difference of the wireless signal received by the co-body antenna when it is in the first working state, that is, curve 1; and the second correspondence between the angle of arrival and the phase difference of the wireless signal received by it when the co-body antenna is in the second working state, that is, curve 2. It can be seen from the figure that relative to curve 1 in the first working state, curve 2 in the second working state is offset to the right by about 8°, 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 co-body antenna is in the first working state and the second working state respectively, and comprehensively determine the angle of arrival based on multiple measurement results to improve the accuracy of the angle of arrival measurement.

[0135] (4) Measurement error under different working conditions

[0136] Fig.21 is the arrival angle measurement error of the common antenna provided in the embodiment of the present application under different working conditions. Fig.21 From (a) in the figure, it can be seen that in the first working state, the measurement error of the common antenna for wireless signals with an arrival angle of 70° to 90° is relatively large, and the error is basically above 10°, and the maximum measurement error is as high as 25°; while the measurement error in the remaining arrival angle measurement range is relatively small, and is basically within 10°. Fig.21 As shown in (b), in the second working state, the measurement error of the common antenna for wireless signals with an arrival angle of 70° to 90° is significantly reduced, and the error is basically within 10°, and the maximum measurement error is reduced to 15°; while the measurement error in the remaining arrival angle measurement range is relatively small, and is basically within 10°. Therefore, combining the first working state with the second working state to measure the arrival angle can make up for each other's shortcomings in the arrival angle 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 between the first working state and the second working state, the phase and amplitude of the first antenna in different working states will also change accordingly.

[0139] Fig. 22It is the phase and amplitude of the first antenna in different working states provided by the embodiment of the present application. The solid line in the figure is used to represent the corresponding relationship between the phase and the frequency, and the dotted line is used to represent the corresponding relationship between the amplitude and the frequency. It can be seen from the figure that, relative to the first working state, the phase and amplitude of the first antenna in the second working state will shift to the right, so that the phase of the wireless signal received by the first antenna in different working states is different, and thus the first antenna and the second antenna have different phase differences in different working states.

[0140] Based on the fact that the first antenna and the second antenna both have good isolation, antenna efficiency, and measurement error in the first working state and the second working state, and the corresponding relationship between the first working state and the second working state corresponding to different arrival angles and phase differences, and that the first antenna can produce different measurement errors in the first working state and the second working state, the measuring device uses the common antenna to measure the arrival angle using the following method.

[0141] Fig.23 2301 to 2305. FIG. 2302 is a schematic flow chart of an arrival angle measurement method provided by another embodiment of the present application. The method is specifically executed by an arrival angle measurement module in a measurement device, and specifically includes the following steps S2301 to S2305.

[0142] S2301, the measuring device controls the common antenna to adjust to a first working state.

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

[0144] S2302: The measuring device measures a first set of arrival angles of wireless signals using the co-body antenna in a first working state of the co-body antenna.

[0145] In some embodiments, for the first working state of the co-body antenna, a first correspondence between the phase difference of the wireless signal received by the first antenna and the second antenna and the angle of arrival is preset in the measuring device. Based on this, the measuring device uses the first antenna and the second antenna to synchronously receive the wireless signal for angle of arrival measurement, and determines the first phase difference of the wireless signal received by the first antenna and the second antenna. Subsequently, the measuring device searches for the first correspondence based on the first phase difference to determine the angle of arrival of the wireless signal.

[0146] by Fig. 20 Taking the first corresponding relationship shown as an example, when the first phase difference is 2°, it can be determined according to the first corresponding relationship that the corresponding first group of arrival angles includes 90° and 100°.

[0147] S2303: The measuring device controls the common antenna to switch from the first working state to the second working state.

[0148] Exemplarily, the measuring device controls C1=0.3 pF and C2=0.4 pF, so that the common antenna enters the second working state.

[0149] S2304: The measuring device measures a second set of arrival angles of the wireless signal using the co-body antenna in a second working state of the co-body antenna.

[0150] In some embodiments, for the second working state of the common antenna, a second correspondence between the phase difference of the wireless signal received by the first antenna and the second antenna and the angle of arrival is preset in the measuring device. Based on this, the measuring device uses the first antenna and the second antenna to synchronously receive the wireless signal for angle of arrival measurement, and determines the second phase difference of the wireless signal received by the first antenna and the second antenna. Subsequently, the measuring device searches for the second correspondence based on the second phase difference to determine the angle of arrival of the wireless signal.

[0151] by Fig. 20 Taking the second corresponding relationship shown as an example, when the second phase difference is 2.3°, it can be determined according to the second corresponding relationship that the corresponding second group of arrival angles includes 90° and 95°.

[0152] S2305: The measuring device determines 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.

[0153] For example, the first group of arrival angles includes 90° and 100°, and the second group of arrival angles includes 90° and 95°. Fig.24 As shown, the measuring device determines the same value 90° in the first group of arrival angles and the second group of arrival angles as the arrival angle of the wireless signal. Alternatively, the measuring device can determine the arrival angle of the wireless signal based on the first group of arrival angles and the second group of arrival angles through an asynchronous fusion algorithm. This embodiment is not described in detail here.

[0154] It should be noted that, during the arrival angle measurement process, the measuring device may cyclically execute the above S2301 to S2305 to measure the arrival angle of the wireless signal in real time, thereby locating the device to be measured in real time.

[0155] The measurement accuracy of the arrival angle measurement method provided in the above embodiment is described below.

[0156] Fig.25It is a schematic diagram of the arrival angle measurement accuracy of the common antenna provided in an embodiment of the present application. The figure shows the measurement error (curve 3) when the arrival angle is measured when the first working state and the second working state are integrated (i.e., the fusion state). It can be seen from the figure that through this arrival angle measurement method, within the arrival angle range of 10° to 180°, the arrival angle measurement error is basically maintained below 10°. In addition, within the arrival angle range of 70° to 90°, compared with the measurement error when only the first working state is used for the arrival angle (curve 1), the arrival angle measurement error of this embodiment is significantly reduced, and the maximum measurement error is reduced by 10°, which is currently only 15°. Therefore, the arrival angle measurement method provided in an embodiment of the present application has a high measurement accuracy.

[0157] Fig.26 It is a schematic diagram of the cumulative distribution function (CDF) of the arrival angle measurement error provided by the embodiment of the present application. In the figure, the horizontal axis is the arrival angle measurement error x, and the vertical axis is the probability that the arrival angle measurement error is within (0, x]. It can be seen from the figure that within the arrival angle measurement range of 0 to 180°, when the measurement device only performs arrival angle measurement in the first working state of the common antenna, the probability that the measurement error is within 10° is only 35%, and the measurement error is within 15° is only 55%. When the arrival angle measurement is integrated in the first working state and the second working state, the probability of the measurement error within 10° increases to 68%, and the probability of the measurement error within 15° is as high as 95%. It can be seen that the method for integrating the arrival angle measurement in the first working state and the second working state provided in the embodiment of the present application can significantly reduce the measurement error and improve the measurement accuracy.

[0158] In the process of measuring the angle of arrival, in order to achieve accurate positioning of the device to be measured, in some embodiments, the measuring device can measure both the horizontal angle θ and the pitch angle To this end, the measuring device can use the common antenna provided in the above embodiment in combination with other single antennas to measure the horizontal angle θ and the elevation angle. measurement.

[0159] The measurement device and arrival angle measurement method provided in the embodiments of the present application are described below using the above-mentioned common antenna combined with a single frame antenna as an example.

[0160] Fig. 27 Schematic diagram of antenna distribution structure of a measuring device provided by an embodiment of the present application. Fig. 27 As shown, the measuring device includes a co-body antenna, a frame antenna and an arrival angle measurement module.

[0161] The co-body antenna includes a first antenna and a second antenna that share the same antenna radiator, and is used to receive a wireless signal sent by the device under test during the angle of arrival measurement process. For details, please refer to the above description and will not be repeated here. In this embodiment, the antenna radiator in the co-body antenna is parallel to the longer side of the measuring device (such as a mobile phone).

[0162] The frame antenna, also referred to as the third antenna in this embodiment, includes an antenna radiator, a grounding point G and a third feeding point F3. The antenna radiator is a part of the metal frame of the electronic device, located between two insulating breakpoints on the metal frame, and is used to transmit / receive wireless signals. In addition, the antenna radiator is connected to the grounding point G through a grounding line, and the grounding point G is connected to the ground plane of the PCB board of the electronic device. The antenna radiator is also connected to the third feeding point F3 through a feeding line, and the RF signal source of the measuring device feeds the antenna radiator through the third feeding point F3.

[0163] The arrival angle 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 measure the arrival angle of the wireless signal. In this embodiment, the arrival angle measurement module can be a UWB module, a WiFi module, a Bluetooth module, or a FR module, etc., which is not limited in this embodiment.

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

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

[0166] Table 2

[0167]

[0168]

[0169] First, when the common antenna is in the first working state and the second working state respectively, the isolation between the first antenna, the second antenna and the third antenna is described.

[0170] Fig.28 Schematic diagram of the isolation between the first antenna, the second antenna and the third antenna provided in the embodiment of the present application. Fig.28 (a) is a schematic diagram of the isolation between the antennas in the first working state, Fig.28 (b) is a schematic diagram of the isolation between the antennas in the second working state. In addition, S12 in the figure is the isolation curve between the first antenna and the second antenna, S13 is the isolation curve between the first antenna and the third antenna, and S23 is the isolation curve between the second antenna and the third antenna. It can be seen from the figure that for the 6.5GHz UWB signal, within the frequency range of 6.25 to 6.75GHz, whether in the first working state or the second working state, the isolation between the antennas is greater than 13dB, and the response between them is small.

[0171] Based on the fact that each antenna in the measuring device has good isolation and antenna efficiency in the first working state and the second working state, the arrival angle of the wireless signal is measured in combination with the first working state and the second working state.

[0172] Fig.29 It is a schematic flow chart 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 comprises the following steps S2901 to S2905.

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

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

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

[0176] by Fig. 27 As shown in Table 3, the measuring 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 elevation 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.

[0177] Table 3

[0178]

[0179] Taking the use of the first antenna and the third antenna to determine the horizontal angle as an example, as shown in Table 4, for the first working state of the common 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 phase difference between the first antenna and the third antenna of the measurement device is By searching the corresponding relationship A1, the horizontal angle of the wireless signal can be determined. It can be understood that since the horizontal angle phase difference and the horizontal angle are not one-to-one corresponding, the horizontal angle may be one or more.

[0180] Taking the use of the first antenna and the second antenna to determine the elevation angle as an example, as shown in Table 4, for the second working state of the common 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 elevation angle. Based on this, the phase difference between the first antenna and the second antenna of the measurement device is By searching the corresponding relationship B1, the elevation angle of the wireless signal can be determined. Similarly, since the phase difference and the elevation angle are not one-to-one corresponding, the elevation angle may be one or more.

[0181] Table 4

[0182]

[0183] S2903, the measuring device controls the common 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 arrival angle measurement module of the measurement device controls C1=0.2pF and C2=0.3pF, so that the common antenna enters the second working state.

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

[0186] Exemplarily, as shown in Table 4, for the second working state of the shared antenna, the measuring 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 measuring device calculates the phase difference between the first antenna and the third antenna according to the second working state. By searching the corresponding relationship A2, the horizontal angle of the wireless signal can be determined. However, there may be one or more horizontal angles.

[0187] Similarly, as shown in Table 4, for the second working state of the common antenna, the measurement device is preset with a corresponding relationship B2 between the phase difference and the elevation angle of the wireless signal received by the first antenna and the second antenna. Based on this, the measurement device measures the phase difference between the first antenna and the second antenna according to the second working state. By searching the corresponding relationship B2, the elevation angle of the wireless signal can be determined. The elevation angle may be one or more.

[0188] S2905: The measuring 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 measuring device comprehensively determines the horizontal angle of the wireless signal according to the horizontal angle 1 in the first group of arrival angles and the horizontal angle 2 in the second group of arrival angles. For example, if the horizontal angle 1 includes 50° and 60° and the horizontal angle 2 includes 60° and 70°, the arrival angle measurement module determines 60° as the horizontal angle of the wireless signal.

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

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

[0192] The present application also provides a chip, see Fig.30 As shown, the chip includes a processor and a memory, in which a computer program is stored. When the computer program is executed by the processor, the arrival angle measurement method in the above embodiments is implemented.

[0193] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the arrival angle measurement method provided in the above embodiments is implemented.

[0194] An embodiment of the present application also provides a computer program product, which includes a computer program. When the computer program is executed by an electronic device, the electronic device implements the arrival angle measurement method provided in the above embodiments.

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

[0196] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (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 function division. There may be other division methods in actual implementation. For example, multiple 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 into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above integrated modules can be implemented in the form of hardware or software functional modules.

[0199] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0200] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0201] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A common antenna, characterized in that: include: 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, where λ is the wavelength of the wireless signal to be measured; One end of the antenna radiator is connected to the first feeding unit to form a first antenna, and the other end is connected to 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 between the first antenna and the second antenna is greater than a threshold.

2. The shared antenna according to claim 1, characterized in that: The first feeding unit and / or the second feeding unit includes a phase shifting element.

3. The shared antenna according to claim 2, characterized in that: The phase shifting element includes a phase shifter, a variable capacitor, a variable capacitor component, a variable inductor or a variable inductor component.

4. The shared antenna according to claim 3, characterized in that: The variable capacitor component 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 to the end of the antenna radiator, and the other end is connected to the switching switch, and the capacitance values ​​of the first sub-capacitor and the second sub-capacitor are fixed.

5. The shared antenna according to claim 3, characterized in that: The variable inductor component 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 to the end of the antenna radiator, and the other end is connected to the switching switch, and the inductance values ​​of the first sub-inductor and the second sub-inductor are fixed.

6. The shared antenna according to any one of claims 1 to 5, characterized in that: The threshold is 10 dB.

7. A measuring device, characterized in that: Including the co-body antenna and arrival angle measurement module, The common antenna is as described in any one of claims 1 to 6; The arrival angle measurement module is used to measure the arrival angle of the wireless signal using the co-body antenna.

8. The measuring device according to claim 7, characterized in that The arrival angle measurement module is used to measure the arrival angle of the wireless signal using the co-body antenna, including: The arrival angle measurement module is used to: The arrival angles of wireless signals are measured respectively in K different working states of the co-body antenna to obtain K groups of arrival angles, where K≥2; wherein the phase shifting element in the co-body antenna has different working parameters in different working states, and the phase shifting element includes a first phase shifting element of the first feeding unit and / or a second phase shifting element of the second feeding unit; The arrival angle of the wireless signal is determined according to the K groups of arrival angles.

9. The measuring device according to claim 7 or 8, characterized in that The measuring device further comprises a single antenna, The arrival angle measurement module is also used to: In K different working states of the co-body antenna, the co-body antenna and the single antenna are used to measure the arrival angle of the wireless signal to obtain K groups of arrival angles; wherein the working parameters of the phase shift element in the co-body antenna are different in different working states; the phase shift element includes the first phase shift element of the first feeding unit, and / or the second phase shift element of the second feeding unit; The arrival angle of the wireless signal is determined according to the K groups of arrival angles.

10. The measuring device according to claim 8 or 9, characterized in that The arrival angle measurement module is used to determine the arrival angle of the wireless signal according to the K groups of arrival angles, including: The arrival angle measurement module is used to determine the arrival angle commonly included in the K groups of arrival angles as the arrival angle of the wireless signal.

11. The measuring device according to claim 9, characterized in that The single antenna is a frame antenna.

12. The measuring device according to claim 9 or 10, characterized in that The antenna spacing between the single antenna and the shared antenna is between 0.45λ and 0.55λ, and the arrival angle of the wireless signal includes a horizontal angle and an elevation angle.

13. A method for measuring an angle of arrival, characterized in that: Applied to a measuring device, the measuring device comprising the common antenna according to any one of claims 2 to 6, the method comprising: The arrival angles of wireless signals are measured respectively in K different working states of the common antenna to obtain K groups of arrival angles, where K≥2; wherein the working parameters of the phase shift element are different in different working states, and the phase shift element includes a first phase shift element of the first feeding unit and / or a second phase shift element of the second feeding unit; The arrival angle of the wireless signal is determined according to the K groups of arrival angles.

14. The method according to claim 13, characterized in that The measuring device further includes a single antenna, and the method further includes: In K different working states of the co-body antenna, the co-body antenna and the single antenna are used to measure the arrival angle of the wireless signal to obtain K groups of arrival angles; wherein the phase shift element in the co-body antenna has different working parameters in different working states, and the phase shift element includes a first phase shift element of the first feeding unit and / or a second phase shift element of the second feeding unit; The angle of arrival of the wireless signal is determined according to the K groups of angles of arrival.

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

16. A chip, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the arrival angle measurement method according to claim 13 or 14 is implemented.

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