Radiator-sharing antenna, measurement device, angle-of-arrival measurement method and readable storage medium

Abstract

The embodiments of the present application relate to the technical field of terminals. Provided are a radiator-sharing antenna, a measurement device, an angle-of-arrival measurement method and a readable storage medium. The radiator-sharing 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 0.25λ and 0.35λ, λ being the wavelength of a wireless signal to be measured; one end of the antenna radiator is connected to the first feeding unit to form a first antenna, 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 by means of the decoupling unit, the decoupling unit comprising a decoupling capacitor, and the isolation degree of the first antenna and the second antenna being greater than a threshold value. The technical solution provided by the embodiments of the present application can achieve functions of two antennas simultaneously just by means of one small-size antenna radiator, thus achieving small occupied space; in addition, the present application has good angle-of-arrival measurement precision, and thus can be applied to electronic devices having small internal spaces.

Description

Community antenna, measurement device, arrival angle measurement method and readable storage medium

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on June 25, 2023, with application number 202310757354.X and application name “Community antenna, measurement equipment, arrival angle measurement method and readable storage medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] 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

[0003] Electronic devices can measure the angle of arrival (AoA) of wireless signals, thereby determining the direction of the wireless signal's transmitter relative to the electronic device and achieving device positioning. Currently, electronic devices typically use at least two patch antennas with an antenna spacing of 0.5λ to receive wireless signals, and determine the signal's angle of arrival based on the phase difference of the wireless signals received by these patch antennas. However, the large number of patch antennas and the large antenna spacing occupy a large space, making it difficult to use in increasingly small devices.

[0004] Summary of the Invention

[0005] The present application provides a co-body antenna, a measurement 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 interior of increasingly narrow devices.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] 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, 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, 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.

[0008] The co-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.

[0009] In some embodiments, the first feeding unit and / or the second feeding unit includes a phase shifting element, which can change the phase of the wireless signal received by the antenna, so that the antenna presents different working states.

[0010] 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.

[0011] In some embodiments, a 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.

[0012] In some embodiments, a 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. 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.

[0013] In some embodiments, the threshold is 10 dB.

[0014] 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.

[0015] 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 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.

[0016] It is understood that under different operating 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 sets of corresponding relationships between phase difference and arrival angle presented by the co-body antenna, and comprehensively determine the final arrival angle based on the multiple arrival angles, achieving high measurement accuracy.

[0017] In some embodiments, the measurement device further includes 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 shared antenna and the single antenna in K different operating states of the shared antenna to obtain K groups of angles of arrival; wherein the phase shifting element in the shared antenna has different operating parameters in different operating states; 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 the angle of arrival of the wireless signal is determined based on the K groups of angles of arrival. The measurement device provided in this embodiment can combine the single antenna and the shared antenna to further improve the accuracy of angle of arrival measurement.

[0018] In some embodiments, the arrival angle measurement module is configured 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.

[0019] In some embodiments, the single antenna is a frame antenna.

[0020] 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.

[0021] In a third aspect, an embodiment of the present application provides an arrival angle measurement method, which is applied to a measurement device, the measurement 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 to obtain K groups of arrival angles, K ≥ 2; wherein the operating parameters of the phase shifter are different in different working states, the phase shifter including the first phase shifter of the first feeding unit and / or the second phase shifter of the second feeding unit; and determining the arrival angle of the wireless signal based on the K groups of arrival angles.

[0022] The arrival angle measurement method provided in the embodiment of the present application can integrate the measured arrival angles of wireless signals under multiple different working states of the common antenna, which helps to improve the measurement accuracy of the arrival angle.

[0023] In some embodiments, the measuring device further includes a third antenna, and the method further includes: measuring the angle of arrival of the wireless signal using the co-body antenna and the single antenna in K different working states of the co-body antenna to obtain K groups of angles of arrival; 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; and determining the angle of arrival of the wireless signal based on the K groups of angles of arrival.

[0024] 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.

[0025] 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, it implements the arrival angle measurement method shown in the third aspect above.

[0026] 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.

[0027] In a sixth aspect, an embodiment of the present application provides a computer program product, in which a computer program is stored. When the computer program is executed on a processor, the arrival angle measurement method as shown in the third aspect above can be implemented.

[0028] 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

[0029] FIG1 is a schematic diagram of an angle of arrival measurement system provided in an embodiment of the present application;

[0030] FIG2 is a schematic diagram of angle of arrival measurement provided by an embodiment of the present application;

[0031] FIG3 is a schematic diagram of horizontal angles and elevation angles provided by an embodiment of the present application;

[0032] FIG4 is a schematic diagram of a measuring device provided by one embodiment of the present application;

[0033] FIG5 is a schematic structural diagram of a co-body antenna provided by an embodiment of the present application;

[0034] FIG6A is a schematic structural diagram of a co-body antenna provided by an embodiment of the present application;

[0035] FIG6B is a schematic structural diagram of an antenna radiator provided in an embodiment of the present application;

[0036] FIG7 is a schematic structural diagram of a co-body antenna provided in another embodiment of the present application;

[0037] FIG8 is a schematic structural diagram of a co-body antenna provided in yet another embodiment of the present application;

[0038] FIG9 is a schematic diagram of the isolation of a common antenna provided by an embodiment of the present application;

[0039] FIG10 is a schematic diagram of the isolation of a common antenna provided by another embodiment of the present application;

[0040] FIG11 is a schematic structural diagram of a co-body antenna provided in another embodiment of the present application;

[0041] FIG12 is a schematic diagram of the arrangement of a co-body antenna in a measurement device according to an embodiment of the present application;

[0042] FIG13 is a schematic diagram of the arrangement of a common antenna in a measurement device according to another embodiment of the present application;

[0043] FIG14 is a schematic structural diagram of a measuring device provided in another embodiment of the present application;

[0044] FIG15 is a schematic diagram of a phase difference of a wireless signal received by a common antenna according to an embodiment of the present application;

[0045] FIG16 is a schematic diagram of the arrival angle measurement accuracy of a co-body antenna provided by one embodiment of the present application;

[0046] FIG17 is a schematic diagram of an arrival angle measurement method provided by an embodiment of the present application;

[0047] FIG18 is a schematic diagram of the isolation between the first antenna and the second antenna provided in an embodiment of the present application;

[0048] FIG19 is a schematic diagram of antenna efficiency of a first antenna and a second antenna provided in an embodiment of the present application;

[0049] FIG20 is a schematic diagram illustrating the corresponding relationship between the arrival angle and phase difference of wireless signals received by the common antenna according to an embodiment of the present application;

[0050] FIG21 is a diagram showing the arrival angle measurement error of the co-body antenna provided in an embodiment of the present application under different working conditions;

[0051] FIG22 shows the phase and amplitude of the first antenna in different working states provided by an embodiment of the present application;

[0052] FIG23 is a schematic flowchart of an arrival angle measurement method provided in another embodiment of the present application;

[0053] FIG24 is a schematic diagram of the principle of fusion determination of arrival angle provided by another embodiment of the present application;

[0054] FIG25 is a schematic diagram of the arrival angle measurement accuracy of the co-body antenna provided in an embodiment of the present application;

[0055] FIG26 is a schematic diagram of a cumulative distribution function of an angle of arrival measurement error provided in an embodiment of the present application;

[0056] FIG27 is a schematic diagram of the antenna distribution structure of a measurement device provided by one embodiment of the present application;

[0057] FIG28 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;

[0058] FIG29 is a schematic flowchart of an arrival angle measurement method provided in another embodiment of the present application;

[0059] Figure 30 is a schematic diagram of the structure of the chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The technical solutions provided in the embodiments of the present application are described below with reference to the accompanying drawings.

[0061] 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 can exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0062] In this embodiment, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, 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.

[0063] The angle of arrival (AoA) is a key parameter in wireless positioning technology. It represents the angle between the incoming wireless signal and the line containing the AoA measurement antenna. AoA measurement allows electronic devices to locate the source device emitting the wireless signal, or, combined with the source device's location information, to locate the electronic device in reverse. This technology holds broad application prospects in wireless positioning technology.

[0064] Figure 1 is a schematic diagram of an arrival angle measurement system provided by an embodiment of the present application. Referring to Figure 1 , the arrival angle measurement system includes a measuring device and a device under test, wherein the measuring device and the device under test support communication using wireless communication technology.

[0065] In this embodiment, the measuring device and the device to be tested can be a mobile phone, a tablet computer, 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), an in-vehicle 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 embodiments of the present application do not limit their specific types.

[0066] The wireless communication technology may be wireless fidelity (WiFi), traditional Bluetooth (BT), Bluetooth low energy (BLE), ultra wide band (UWB) or radio frequency (RF) communication technology, and the embodiments of the present application are not limited thereto.

[0067] The device under test is configured to transmit the wireless signal required for the angle of arrival measurement during the measurement process. The wireless signal may be a measurement frame, a beacon frame, or the like. Optionally, the device under test may transmit the wireless signal autonomously or in response to instructions from the measurement device. The wireless signal may be a WiFi signal, a Bluetooth signal, an UWB signal, or a FR signal, and is not limited in this embodiment of the present application.

[0068] A measuring device is configured to receive a wireless signal transmitted by a device under test via at least two antennas, and determine an angle of arrival of the wireless signal based on a phase difference Δφ between the wireless signals received by the at least two antennas. Exemplarily, the measuring device may calculate the angle of arrival of the wireless signal using an angle of arrival calculation formula, or may determine the angle of arrival of the wireless signal based on a correspondence between the phase difference and the angle of arrival.

[0069] It should be noted that the antenna in this embodiment refers to an antenna for angle of arrival measurement. It should be understood that, although not shown in this embodiment, the measurement device may include other antennas in addition to the above-mentioned antenna for angle of arrival measurement, 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 operating 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.

[0070] FIG2 is a schematic diagram of angle of arrival measurement provided by an embodiment of the present application. Referring to FIG2 , taking the example of a device under test transmitting a wireless signal during angle of arrival measurement, and the example of a measuring device receiving the wireless signal using antenna 1 and antenna 2, when antenna 1 and antenna 2 are ideal point source antennas, and the antenna radiation patterns of various points around the point source antennas are approximately spherical, the measuring device can determine the angle of arrival of the wireless signal according to the following formula (1).

[0071] 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 This is the phase difference between the wireless signals received by antenna 1 and antenna 2 of the measurement device. d is the distance between antenna 1 and 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 arrival angle.

[0072] It's important to note that antenna radiation patterns describe the relationship between the electromagnetic energy radiated by an antenna and various locations in space. Antenna radiation patterns are typically three-dimensional structures centered on the antenna. For an ideal point source antenna, the electromagnetic energy radiated is uniform in all directions and decays uniformly at the same amplitude. Therefore, the radiation pattern of an ideal point source antenna is approximately spherical.

[0073] The arrival angle includes the horizontal arrival angle (abbreviated as horizontal angle θ) and the pitch arrival angle (abbreviated as pitch angle ). As shown in FIG3 , 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 incoming wave direction of the wireless signal and the straight line where the elevation angle measurement antenna is located.

[0074] It should be noted that the azimuth and elevation measurement antennas are pre-set in the measurement device. For example, if the measurement device is a rectangular electronic device such as a mobile phone or tablet, when the measurement device displays an image in portrait mode and performs angle-of-arrival measurements, the antenna substantially parallel to the short side of the measurement device is the azimuth measurement antenna, and the antenna substantially parallel to the long side of the measurement device is the elevation measurement antenna. When the measurement device displays an image in landscape mode and performs angle-of-arrival measurements, the antenna substantially parallel to the long side of the measurement device is the azimuth measurement antenna, and the antenna substantially parallel to the short side of the measurement device is the elevation measurement antenna.

[0075] Figure 4 is a schematic diagram of a measuring device provided by an embodiment of the present application. As shown in Figure 4, the measuring device includes an antenna A and an antenna B. Antenna A and antenna B are both patch antennas, and the straight line on which 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.

[0076] Because the antenna radiator of the patch antenna is large in size and the antenna spacing D≈0.5λ must be maintained, the space occupied by multiple antennas as a whole is relatively large. For example, as shown in Figure 4, taking the antenna radiators of antenna A and antenna B as an example, the length of the antenna radiator is approximately 0.4λ and the width is approximately 0.35λ. The length of antenna A and antenna B as a whole in the electronic device 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 of this wireless signal is λ=46mm. Therefore, 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 dual antenna as a whole is 39.1mm and the width is approximately 16.1mm.

[0077] It can be seen that in the arrival angle 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.

[0078] 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.

[0079] It should be noted that in this embodiment, an antenna that uses a single antenna radiator is called a single antenna, and multiple antennas (such as two antennas, three antennas, etc.) that share an antenna radiator are called a shared antenna as a whole. Each antenna in the shared antenna can operate independently and has little impact on each other.

[0080] As shown in Figure 5, 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 include a phase shifting element.

[0081] The following describes in detail the shared antenna provided in the embodiment of the present application with reference to specific examples.

[0082] FIG6A is a schematic structural diagram of a co-body antenna provided by an embodiment of the present application. Referring to FIG6A , the co-body antenna includes an antenna radiator, a first feeding unit, a second feeding unit, and a decoupling unit.

[0083] 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.

[0084] For example, as shown in Figure 6B , 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, if the wireless signal to be measured is a 6.5GHz UWB signal, 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. As can be seen, the antenna radiator is relatively small.

[0085] In addition, in this embodiment, the antenna spacing of the shared antenna is equal to the length of the antenna radiator, that is, the antenna spacing of the shared 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.

[0086] A 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 shifter, a first feed point F1, and required connecting circuitry, and the first phase shifter is 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 stimulate the left-handed antenna mode of the first antenna. The first phase shifter is used to change the phase of the wireless signal received by the first antenna.

[0087] A 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 shifter, a second feed point F2, and required connecting circuitry, and the second phase shifter is located between the antenna radiator and the second feed point F2. The second feed point F2 is used to feed power to the second antenna and stimulate the left-handed antenna mode of the second antenna. The second phase shifter is used to change the phase of the wireless signal received by the second antenna.

[0088] 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.

[0089] Optionally, in the first feeding unit and the second feeding unit, 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. Among them, the phase shifter, variable capacitor and 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 multiple capacitors or multiple inductors, and to switch the switch to actually select the element connected to the feeding unit, thereby realizing the adjustment of the working parameters. The setting of the phase shifting element is specifically shown below.

[0090] For example, referring to the co-body antenna shown in Figure 7(a), the first feed unit includes a first phase shifter ψ1, and the second feed unit includes a second phase shifter ψ2. During the angle-of-arrival measurement process, ψ1 and ψ2 are controlled by the measurement device to set specific phase shift values, thereby adjusting the phase information fed back by the antenna to the measurement device.

[0091] Alternatively, referring to the co-body antenna shown in Figure 7(b), the first feed unit includes a first variable capacitor C1, and the second feed unit includes a second variable capacitor C2. During the angle-of-arrival measurement process, the capacitance values ​​of C1 and C2 are set according to the control of the measurement device, thereby adjusting the phase information fed back by the antenna to the measurement device.

[0092] Alternatively, referring to the co-body antenna shown in Figure 7(c), the first feed unit includes a first variable inductor L1, and the second feed unit includes a second variable inductor L2. During the angle-of-arrival measurement process, the inductance values ​​of L1 and L2 are set according to the instructions of the measurement equipment, thereby adjusting the phase information fed back by the antenna to the measurement equipment.

[0093] Alternatively, referring to the common antenna shown in FIG8 (a), the first feeding unit includes a variable capacitance component C1, and the second feeding unit includes a variable capacitance component C2. The variable capacitance component C1 includes a first sub-capacitor C 1-1 , the second sub-capacitor C 1-2 and the switching switch, the first sub-capacitor C 1-1 and the second sub-capacitor C 1-2 The capacitance value is fixed, with one end connected to the end of the antenna radiator and the other end connected to the switch. During the angle-of-arrival measurement process, the switch switches the sub-capacitors according to the control of the measurement device, selecting the sub-capacitor actually connected to the first feed unit, and thus adjusting the phase information fed back by the antenna to the measurement device.

[0094] Alternatively, referring to the common antenna shown in FIG8( 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 inductor has a fixed value, with one end connected to the end of the antenna radiator and the other end connected to a switch. During the angle-of-arrival measurement process, the switch switches the sub-inductor according to the instructions of the measurement device, selecting the sub-inductor actually connected to the first feed unit, and then adjusting the phase information fed back by the antenna to the measurement device.

[0095] 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.

[0096] It should be noted that decoupling the first and second antennas means increasing the isolation between them, reducing the mutual influence between them when they operate simultaneously. Isolation represents the degree of coupling between the two antennas. A greater degree of isolation reduces the degree of coupling between the two antennas, and thus minimizes the mutual influence between the two antennas during operation.

[0097] In this shared antenna, although the length of the antenna radiator is only 0.25λ to 0.35λ, that is, the antenna spacing is only 0.25λ to 0.35λ, the decoupling capacitor in the decoupling unit can maintain the isolation between the first antenna and the second antenna in the shared antenna greater than a threshold. Exemplarily, the threshold is greater than or equal to 10dB, for example, between 10 and 15dB, such as 10dB, 13dB, or 15dB.

[0098] 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 co-body 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.

[0099] For example, as shown in FIG9 , 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 a decoupling capacitor C d When the decoupling unit of the co-body antenna includes a decoupling capacitor C d When receiving 6.5GHz UWB signals, the isolation between the first antenna and the second antenna in the co-antenna is shown as the solid line. When receiving 6.5GHz UWB signals, the isolation is greater than 13.5dB, the isolation is good, and has been significantly improved.

[0100] For another example, referring to FIG10 , for a coexisting antenna with a radiator length of 0.33λ≈15mm and a width of 0.1λ≈5mm, when the decoupling unit of the coexisting antenna does not include a decoupling capacitor C d When the decoupling unit of the co-body antenna includes a decoupling capacitor C d When receiving 6.5GHz UWB signals, the isolation between the first antenna and the second antenna in the co-antenna is shown as the solid line. When receiving 6.5GHz UWB signals, the isolation is greater than 11dB, the isolation is good, and has been significantly improved.

[0101] 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.

[0102] 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, as shown in FIG11 , 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.

[0103] 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 each of the above embodiments may also include other required components, such as resistors, other capacitors, other inductors, etc., which are specifically configured according to needs, and this embodiment does not impose specific restrictions on this.

[0104] Figures 12 and 13 are schematic diagrams of the arrangement of the co-body antenna provided in the embodiment of the present application in the measuring device. Referring to Figure 12, the co-body antenna as a whole can be arranged on a substrate (such as a printed circuit board (PCB)) of the measuring device, and the bottom of the substrate is a ground plane. The first feeding unit, the second feeding unit and the decoupling unit in the co-body antenna can be grounded through the ground plane. In addition, referring to Figure 13, 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 co-body antenna maintains a compact structure, further reducing the occupation of the internal space of the measuring device.

[0105] 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.

[0106] The following describes in detail the angle of arrival measurement of the co-antenna provided in the embodiment of the present application in conjunction with the measurement equipment.

[0107] Figure 14 is a schematic diagram of the structure of a measurement device provided in another embodiment of the present application. As shown in Figure 14, the measurement device includes a co-body antenna and an arrival angle measurement module.

[0108] The shared antenna, comprising a first antenna and a second antenna sharing the same antenna radiator, is used to receive wireless signals transmitted by the device under test during the angle of arrival measurement process, and its operating state is adjustable. For details, please refer to the previous section and will not be repeated here.

[0109] It should be noted that, depending on the location of the antenna in the measurement equipment, it can be used to measure the horizontal angle θ or the elevation angle. For example, if the antenna radiator of a co-body antenna is parallel to the shorter side of a mobile phone and the phone is in portrait mode, the co-body antenna can be used to measure the horizontal angle of a wireless signal. Alternatively, if the antenna radiator of a co-body antenna is parallel to the longer side of a mobile phone and the phone is in portrait mode, the co-body antenna can be used to measure the elevation angle of a wireless signal.

[0110] The angle-of-arrival measurement module connects the first antenna's feed point F1 to the second antenna's feed point F2 and uses the first and second antennas to measure the angle of arrival of wireless signals. In this embodiment, the angle-of-arrival measurement module can be a UWB module, a WiFi module, a Bluetooth module, or a FR module, etc., and this embodiment is not limited thereto.

[0111] Optionally, in this embodiment, the angle-of-arrival measurement module may also control the first antenna and / or the second antenna to adjust operating parameters of their phase shifting elements. For example, when the phase shifting element is a variable capacitor or a variable capacitor component, the angle-of-arrival measurement module may control the adjustment of its capacitance value; or, when the phase shifting element is a variable inductor or a variable inductor component, the angle-of-arrival measurement module may control the adjustment of its inductance value.

[0112] 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 based on 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 antenna, there is a good one-to-one correspondence between the phase difference and the arrival angle of the wireless signal received by the common antenna, so it has good arrival angle measurement accuracy.

[0113] FIG15 is a schematic diagram of the phase difference of the wireless signal received by the co-body 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 cases where multiple arrival angles correspond to the same phase difference, and it is basically impossible to reversely infer the arrival angle by combining the phase difference and the preset correspondence. dIt can be clearly seen that within the angle range of 55° to 180°, as the arrival angle 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 arrival angle. The arrival angle can be inferred by combining the phase difference and the preset correspondence. Therefore, the decoupling capacitor C in the decoupling unit 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.

[0114] FIG16 is a schematic diagram of the arrival angle measurement accuracy of the 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 measurement error of the arrival angle is basically less than 10°, the maximum measurement error in the range of 70° to 100° is also reduced from 50° to 25°, and the measurement accuracy of the arrival angle is significantly improved.

[0115] 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.

[0116] However, because the antenna spacing between the first and second antennas in this co-body antenna is only between 0.25λ and 0.35λ, which is much smaller than the ideal half-wavelength of 0.5λ, the measurement error is still not sufficiently small within certain angle ranges, such as the 70° to 100° range in Figure 16. To further improve the arrival angle measurement accuracy of this co-body antenna and reduce the measurement error, the present embodiment also provides the following arrival angle measurement method for this co-body antenna.

[0117] Figure 17 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.

[0118] S1701: In K different working states of the shared antenna, a measurement device uses the shared antenna to measure the arrival angle of the wireless signal respectively to obtain K groups of arrival angles, where K≥2.

[0119] The operating parameters of the phase-shifting element of a common antenna vary under different operating conditions. For example, when the phase-shifting element is a phase shifter, its operating parameter is the phase shift value; when the phase-shifting element is a variable inductor or a variable inductor component, its operating parameter is the inductance value; and when the phase-shifting element is a variable capacitor or a variable capacitor component, its operating parameter is the capacitance value.

[0120] In an example, when the first phase shift element of the co-body antenna is the first variable capacitor C1 and the second phase shift element is the second variable capacitor C2, in the first working state, C1 = 0.4 pF, C2 = 0.4 pF; in the second working state, C1 = 0.3 pF, C2 = 0.4 pF.

[0121] Because phase shifters can alter the phase of wireless signals received by an antenna, and their ability to alter phase varies under different operating parameters, the common antenna, under K different operating states, corresponds to K sets of phase difference-to-arrival angle relationships. Based on this, when measuring the arrival angle of a wireless signal, the measurement device can obtain K sets of arrival angles based on these K sets of relationships.

[0122] S1702: The arrival angle measurement module determines the arrival angle of the wireless signal based on the K groups of arrival angles.

[0123] In this embodiment, the measurement device can determine the angle of arrival of the wireless signal based on the N sets of angles of arrival through asynchronous fusion. Asynchronous fusion refers to determining a target parameter based on data determined at different times. For example, in this embodiment, the angle of arrival of the wireless signal is determined based on N sets of angles of arrival determined at different times.

[0124] Through the method provided in the embodiment of the present application, the measuring equipment can perform multiple arrival angle measurements based on multiple sets of correspondences between the phase difference and 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.

[0125] The wireless signal to be measured is a 6.5GHz 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, combined 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.

[0126] Table 1

[0127] First, the isolation between the first antenna and the second antenna in the co-body 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 working parameters are explained when the co-body antenna is in the first working state and the second working state respectively.

[0128] (1) Isolation

[0129] Figure 18 is a schematic diagram of the isolation between the first and second antennas provided in an embodiment of the present application. The solid line in the figure represents the isolation between the first and second antennas in the first operating state, and the dashed line represents the isolation between the first and second antennas in the second operating state. It can be seen that when the measured signal is a 6.5 GHz UWB signal, within the frequency range of 6.25 to 6.75 GHz, the isolation between the first and second antennas in the first and second operating states is substantially greater than 13 dB, demonstrating 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 in an embodiment of the present application, with the horizontal axis representing frequency and the vertical axis representing antenna efficiency. The solid line in the figure represents the antenna efficiency of the first antenna and the second antenna in the first operating state, and the dotted line represents the antenna efficiency of the first antenna and the second antenna in the second operating state. As can be seen from the figure, within the frequency range of 6.25 to 6.75 GHz, both in the first operating state and the second operating state, the antenna efficiency of the first antenna and the second antenna is greater than -4.5 dB, indicating high antenna efficiency.

[0132] In this embodiment, antenna efficiency is used to characterize the energy conversion efficiency of the antenna. It is the ratio of the antenna's radiated power Pr (i.e., the power effectively converted into electromagnetic waves) 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] FIG20 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 the co-body antenna when it is in the second working state, that is, curve 2. As can be seen from the figure, relative to curve 1 in the first working state, curve 2 in the second working state is offset to the right by approximately 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 measurement 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] Figure 21 shows the arrival angle measurement error of the co-body antenna provided by the embodiment of the present application in different working states. As shown in (a) of Figure 21, in the first working state, the measurement error of the co-body antenna for wireless signals with an arrival angle of 70° to 90° is relatively large, with the error basically above 10°, and the maximum measurement error is as high as 25°; while the measurement error in the rest of the arrival angle measurement range is relatively small, basically within 10°. As shown in (b) of Figure 21, in the second working state, the measurement error of the co-body antenna for wireless signals with an arrival angle of 70° to 90° is significantly reduced, with the error basically within 10°, and the maximum measurement error is reduced to 15°; while the measurement error in the rest of the arrival angle measurement range is relatively small, basically also within 10°. Therefore, combining the first working state and 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 shared 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] Figure 22 shows the phase and amplitude of the first antenna in different operating states provided by an embodiment of the present application. The solid line in the figure represents the corresponding relationship between phase and frequency, and the dotted line represents the corresponding relationship 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 in the second operating state are shifted to the right, causing the first antenna to receive different phases of the wireless signal in different operating states, thereby causing the first antenna and the second antenna to produce different phase differences in different operating 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 different arrival angles and phase differences corresponding to the first working state and the second working state, 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] 23 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 operating state of the shared antenna, the measurement device is preset with a first correspondence between the phase difference of the wireless signals received by the first and second antennas and the angle of arrival. Based on this correspondence, the measurement device uses the first and second antennas to synchronously receive wireless signals for angle of arrival measurement and determines a first phase difference between the wireless signals received by the first and second antennas. The measurement device then searches the first correspondence based on the first phase difference to determine the angle of arrival of the wireless signal.

[0146] Taking the first corresponding relationship shown in FIG. 20 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 the second working state of the co-body antenna.

[0150] In some embodiments, for the second operating state of the shared antenna, the measurement device is preset with a second correspondence between the phase difference and angle of arrival of the wireless signals received by the first and second antennas. Based on this correspondence, the measurement device uses the first and second antennas to synchronously receive wireless signals for angle of arrival measurement and determines a second phase difference between the wireless signals received by the first and second antennas. The measurement device then searches the second correspondence based on the second phase difference to determine the angle of arrival of the wireless signal.

[0151] Taking the second corresponding relationship shown in FIG. 20 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 arrival angle of the wireless signal based on the first set of arrival angles and the second set of arrival angles.

[0153] Taking the example of a first set of arrival angles including 90° and 100°, and a second set of arrival angles including 90° and 95°, as shown in FIG24 , the measurement device determines the same value, 90°, in both the first and second sets of arrival angles as the arrival angle of the wireless signal. Alternatively, the measurement device can determine the arrival angle of the wireless signal based on the first and second sets of arrival angles using an asynchronous fusion algorithm. This embodiment is not further described here.

[0154] It should be noted that, during the arrival angle measurement process, the measuring device may cyclically execute the above steps 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 following describes the measurement accuracy of the arrival angle measurement method provided by the above embodiment.

[0156] Figure 25 is a schematic diagram of the arrival angle measurement accuracy of the co-body antenna provided in an embodiment of the present application. The figure shows the measurement error (curve 3) when the arrival angle measurement is performed when the first working state and the second working state are integrated (i.e., the integrated 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°, and is currently only 15°. Therefore, the arrival angle measurement method provided in an embodiment of the present application has high measurement accuracy.

[0157] Figure 26 is a schematic diagram of the cumulative distribution function (CDF) of the arrival angle measurement error provided by an 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 degrees, when the measurement device performs arrival angle measurement only in the first working state of the common antenna, the probability that the measurement error is within 10 degrees is only 35%, and the measurement error is within 15 degrees 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 degrees increases to 68%, and the probability of the measurement error within 15 degrees 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 by 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] Figure 27 is a schematic diagram of the antenna distribution structure of a measurement device provided by an embodiment of the present application. As shown in Figure 27, the measurement 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 a common radiator, and is used to receive wireless signals transmitted by the device under test during angle of arrival measurement. For details, see the previous section and will not be repeated here. In this embodiment, the antenna radiator of the co-body antenna is parallel to the longer side of the measurement device (e.g., a mobile phone).

[0162] The frame antenna, also referred to as the third antenna in this embodiment, includes an antenna radiator, a ground point G, and a third feed point F3. The antenna radiator is a portion of the metal frame of the electronic device, located between two insulated breakpoints on the metal frame, and is used to transmit and receive wireless signals. Furthermore, the antenna radiator is connected to ground point G via a ground line, which is connected to the ground plane of the electronic device's PCB. The antenna radiator is also connected to the third feed point F3 via a feed line. The RF signal source of the measurement device feeds the antenna radiator through the third feed point F3.

[0163] The angle-of-arrival measurement module is connected to the feed point F1 of the first antenna, the feed point F2 of the second antenna, and the feed point F3 of the third antenna, and uses the first antenna, the second antenna, and the third antenna to 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 a FR module, etc., and this embodiment is not limited to this.

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

[0165] The following is based on the measurement device provided by the example of the present application. The wireless signal to be measured is a 6.5GHz 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, combined 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] First, the isolation between the first antenna, the second antenna, and the third antenna of the common antenna when the common antenna is in the first working state and the second working state respectively is described.

[0168] Figure 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. Among them, (a) in Figure 28 is a schematic diagram of the isolation between the antennas in the first working state, and (b) in Figure 28 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, in 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 each other is small.

[0169] Since 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.

[0170] Figure 29 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 includes the following steps S2901 to S2905.

[0171] S2901: The measuring device controls the common antenna to switch to a first working state.

[0172] In this embodiment, based on the operating parameters shown in Table 2, the arrival angle measurement module of the measurement device controls C1 = 0.3pF and C2 = 0.3pF, so that the common antenna enters the first operating state. The specific switching method of the operating state is shown above and will not be repeated here.

[0173] S2902 , in a first working state, the measuring device uses the first antenna and the second antenna in the shared antenna and the third antenna of the single body to measure a first set of arrival angles of the wireless signal.

[0174] Taking the relative positional relationship between the antennas shown in Figure 27 as an example, as shown in Table 3, the measurement device can determine the horizontal angle based on the phase information of the wireless signals received by the first and third antennas, or the second and third antennas. Furthermore, the measurement device can determine the elevation angle based on the phase information of the wireless signals received by the first and second antennas, or the second and third antennas.

[0175] Table 3

[0176] 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 shared 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, there may be one or more horizontal angles.

[0177] 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 shared 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 pitch angle of the wireless signal can be determined. Similarly, since the phase difference and the pitch angle are not one-to-one corresponding, the pitch angle may be one or more.

[0178] Table 4

[0179] S2903: The measuring device controls the common antenna to switch from the first working state to the second working state.

[0180] In this embodiment, based on the operating parameters shown in Table 2, the arrival angle measurement module of the measurement device controls C1 = 0.2 pF and C2 = 0.3 pF, so that the common antenna enters the second operating state.

[0181] S2904 , in the second working state, the measuring device uses the first antenna and the second antenna in the shared antenna and the third antenna of the single body to measure a second set of arrival angles of the wireless signal.

[0182] For example, as shown in Table 4, for the second working state of the shared 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 calculates the phase difference between the first antenna and the third antenna according to the second working state. By searching for the corresponding relationship A2, the horizontal angle of the wireless signal can be determined. However, the horizontal angle may be one or more.

[0183] Similarly, as shown in Table 4, for the second working state of the shared antenna, the measurement device is preset with a corresponding relationship B2 between the phase difference and the elevation angle of the wireless signals 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.

[0184] S2905: The measuring device measures the arrival angle of the wireless signal according to the first set of arrival angles and the second set of arrival angles.

[0185] In this embodiment, the measurement device determines the horizontal angle of the wireless signal based on horizontal angle 1 in the first set of arrival angles and horizontal angle 2 in the second set of arrival angles. For example, if horizontal angle 1 includes 50° and 60°, and horizontal angle 2 includes 60° and 70°, the arrival angle measurement module determines 60° as the horizontal angle of the wireless signal.

[0186] The measurement device also determines the elevation angle of the wireless signal based on elevation angle 1 in the first set of arrival angles and elevation angle 2 in the second set of arrival angles. For example, if elevation angle 1 includes 30° and 50°, and elevation angle 2 includes 30°, the arrival angle measurement module determines 30° as the elevation angle of the wireless signal.

[0187] 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 this application.

[0188] An embodiment of the present application also provides a chip, as shown in Figure 30, which includes a processor and a memory. The memory stores a computer program, and when the computer program is executed by the processor, the arrival angle measurement method in the above embodiments is implemented.

[0189] 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.

[0190] An embodiment of the present application further 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.

[0191] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may 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 gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0192] 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).

[0193] In the embodiments provided in this application, the division of each framework or module is merely a logical function division. In actual implementation, there may be other division methods, for example, multiple frameworks or modules can be combined or integrated into another system, or some features can be ignored or not executed.

[0194] In addition, the functional modules in the various embodiments of the present application may be integrated into a processing module, or each module may exist physically separately, or two or more modules may be integrated into a single module. The above-mentioned integrated modules may be implemented in the form of hardware or software functional modules.

[0195] Those skilled in the art will 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.

[0196] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0197] The above-described embodiments 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, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection 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.

Images