Electronic tag antenna pattern test system and method

Abstract

The invention discloses an electronic tag antenna pattern test system and method, and belongs to the technical field of radio frequency identification. The system comprises an electronic tag which is configured to rotate along a first rotating shaft; the reader-writer antenna and the electronic tag are arranged at an interval in the direction of the first rotating shaft, and the reader-writer antenna is configured to synchronously rotate with the electronic tag along the first rotating shaft and provide excitation energy for the electronic tag so as to activate the electronic tag; the transmitting-receiving antenna and the electronic tag are arranged at an interval along the direction of the second rotating shaft, and the transmitting-receiving antenna is configured to rotate along the second rotating shaft, transmit a test signal of the working frequency band of the electronic tag to the activated electronic tag and receive a feedback signal of the electronic tag; the second rotating shaft is perpendicular to the first rotating shaft; and the testing device is electrically connected with the transceiving antenna and is configured to determine antenna pattern information of the electronic tag according to the feedback signal. According to the invention, the electronic tag antenna pattern can be directly tested, the test error is reduced, and the test accuracy is improved.

Description

Technical Field

[0001] The present application belongs to the field of radio frequency identification technology, and in particular, relates to an electronic tag antenna pattern testing system and method. Background Art

[0002] With the continuous advancement of information technology, the radio frequency identification (RFID) industry is also playing an increasingly important role in the general trend of the Internet of Things. However, as the application fields and scope of RFID electronic tags continue to expand, various problems have also emerged accordingly. The most common problem is the poor reading or inventory effect of electronic tags. If the directional pattern of the electronic tag antenna can be tested, the radiation strength of the tag antenna in each direction can be more clearly understood, and then the direction of improvement can be clarified, the trial and error cost can be reduced, and work efficiency can be improved.

[0003] The antenna test in the related technology is a far-field test, and the near-field test result can only be calculated through theoretical formulas such as far-field and near-field transformation, which increases the near-field test error and reduces the accuracy of the near-field test. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an electronic tag antenna pattern test system and method, which can directly test the electronic tag antenna pattern, reduce test errors, and improve test accuracy.

[0005] In a first aspect, the present application provides an electronic tag antenna pattern testing system, comprising:

[0006] The electronic tag is configured to rotate along a first rotation axis;

[0007] a reader / writer antenna, arranged at intervals from the electronic tag along the direction of the first rotation axis, configured to rotate synchronously with the electronic tag along the first rotation axis, and to provide excitation energy to the electronic tag to activate the electronic tag;

[0008] a transceiver antenna, which is spaced apart from the electronic tag along a second rotation axis, and is configured to rotate along the second rotation axis, and to send a test signal of the electronic tag working frequency band to the activated electronic tag and receive a feedback signal of the electronic tag during the rotation of the electronic tag and the transceiver antenna; the second rotation axis is perpendicular to the first rotation axis;

[0009] The testing device is electrically connected to the transceiver antenna and is configured to determine the electronic tag antenna pattern information according to the feedback signal.

[0010] According to the electronic tag antenna pattern test system of the present application, the electronic tag is rotated along a first rotation axis and the transceiver antenna is rotated along a second rotation axis, and the first rotation axis is perpendicular to the second rotation axis, that is, the electronic tag and the transceiver antenna are respectively rotated in two perpendicular plane dimensions to obtain feedback signals of the electronic tag at various angles in space, determine the antenna pattern information at various angles in space, and realize direct testing of the electronic tag antenna pattern without far-field and near-field conversion, thereby reducing test errors and improving test accuracy. In addition, the reader / writer antenna and the electronic tag are spaced apart and rotate synchronously along the direction of the first rotation axis, so that the electronic tag can obtain the excitation energy provided by the reader / writer antenna in real time during the rotation process, thereby improving the activation effect of the electronic tag and further improving the test effect.

[0011] According to an embodiment of the present application, the reader / writer antenna is further configured to provide excitation energy to the electronic tag every time the electronic tag rotates a first angle or the transceiver antenna rotates a second angle;

[0012] The transceiver antenna is further configured to send the test signal to the activated electronic tag and receive a feedback signal from the electronic tag each time the electronic tag rotates by the first angle or each time the transceiver antenna rotates by the second angle.

[0013] According to one embodiment of the present application, the transceiver antenna is further configured to rotate 360° along the second rotation axis at a second angle in steps;

[0014] The electronic tag is further configured to rotate 360° along the first rotation axis at the first angle every time the transceiver antenna rotates at the second angle;

[0015] or,

[0016] The electronic tag is further configured to rotate 360° along the first rotation axis at a first angle in steps;

[0017] The transceiver antenna is further configured to rotate 360° along the second rotation axis at a second angle every time the electronic tag rotates at the first angle.

[0018] According to an embodiment of the present application, the normal direction of the transceiver antenna is perpendicular to the normal direction of the reader / writer antenna.

[0019] According to an embodiment of the present application, the reader / writer antenna is a near-field antenna, and the transceiver antenna is a linearly polarized antenna.

[0020] According to one embodiment of the present application, the electronic tag antenna pattern testing system further includes:

[0021] A first rotating structure, the electronic tag and the reader / writer antenna are located in the first rotating structure, and the first rotating structure is configured to drive the electronic tag and the reader / writer to rotate synchronously along the first rotating axis;

[0022] A second rotating structure, the transceiver antenna is located in the second rotating structure, and the second rotating structure is configured to drive the transceiver antenna to rotate synchronously along the second rotating axis.

[0023] According to one embodiment of the present application, the electronic tag antenna pattern testing system further includes:

[0024] The bracket is located between the electronic tag and the reader antenna, and the dielectric constant of the bracket is equal to the dielectric constant of air.

[0025] According to one embodiment of the present application, the testing device includes:

[0026] a test device, electrically connected to the first rotating structure, the second rotating structure, the reader / writer antenna and the transceiver antenna, respectively, and configured to control the first rotating structure to rotate along the first rotating axis, control the second rotating structure to rotate along the second rotating axis, control the reader / writer antenna to provide the excitation energy, and control the transceiver antenna to send the test signal, obtain the feedback signal through the transceiver antenna, and determine the signal strength of the feedback signal;

[0027] The host computer is electrically connected to the test device and is configured to determine the electronic tag antenna pattern information according to the signal strength.

[0028] According to an embodiment of the present application, the host computer is further configured to draw a three-dimensional directional pattern of the electronic tag antenna according to the directional pattern information of the electronic tag antenna.

[0029] According to one embodiment of the present application, the electronic tag antenna pattern testing system further includes:

[0030] A fully anechoic chamber, wherein the electronic tag, the reader / writer antenna and the transceiver antenna are located.

[0031] In a second aspect, the present application provides a method for testing an electronic tag antenna pattern, which includes:

[0032] Control the electronic tag and the reader / writer antenna to rotate synchronously along a first rotation axis, and control the transceiver antenna to rotate along a second rotation axis; the reader / writer antenna and the electronic tag are arranged at intervals along the direction of the first rotation axis, the transceiver antenna and the electronic tag are arranged at intervals along the direction of the second rotation axis, and the second rotation axis is perpendicular to the first rotation axis;

[0033] Controlling the reader / writer antenna to provide excitation energy to the electronic tag to activate the electronic tag;

[0034] During the rotation of the electronic tag and the transceiver antenna, a test signal of the electronic tag working frequency band is sent to the activated electronic tag, and a feedback signal of the electronic tag is received;

[0035] The electronic tag antenna pattern information is determined according to the feedback signal.

[0036] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0037] By rotating the electronic tag along a first rotation axis and rotating the transceiver antenna along a second rotation axis, and the first rotation axis is perpendicular to the second rotation axis, that is, the electronic tag and the transceiver antenna rotate in two perpendicular plane dimensions respectively, so as to obtain feedback signals of the electronic tag at various angles in space, determine antenna directional pattern information at various angles in space, and realize direct testing of the antenna directional pattern of the electronic tag without far-field and near-field conversion, thereby reducing test errors and improving test accuracy. In addition, the reader / writer antenna and the electronic tag are spaced apart and rotate synchronously along the direction of the first rotation axis, so that the electronic tag can obtain the excitation energy provided by the reader / writer antenna in real time during the rotation process, thereby improving the activation effect of the electronic tag and further improving the test effect.

[0038] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 It is a structural schematic diagram of an electronic tag antenna pattern testing system provided in an embodiment of the present application;

[0041] Figure 2 It is a flow chart of the electronic tag antenna pattern testing method provided in the embodiment of the present application. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0043] The following describes an electronic tag antenna pattern testing system and method provided by an embodiment of the present application with reference to the accompanying drawings.

[0044] Figure 1 The schematic diagram of the structure of the electronic tag antenna pattern test system provided in the embodiment of the present application, wherein the electronic tag can be a passive tag, such as an ultra-high frequency RFID electronic tag.

[0045] like Figure 1 As shown, the electronic tag antenna pattern test system provided in the embodiment of the present application includes an electronic tag 1, a reader / writer antenna 2, a transceiver antenna 3 and a test device 4.

[0046] An antenna, i.e., the electronic tag antenna, is provided inside the electronic tag 1. The electronic tag 1 is configured to rotate along a first rotation axis A, i.e., the electronic tag antenna rotates along the first rotation axis A. During the test, the electronic tag 1 can rotate 360° along the first rotation axis A. For example, the first rotation axis A is a vertical axis, and the electronic tag 1 rotates along the vertical axis, i.e., the electronic tag 1 rotates in a horizontal plane. The electronic tag 1 can be a linearly polarized tag or a circularly polarized tag. Different types of electronic tags can be selected for testing according to actual needs.

[0047] The reader / writer antenna 2 and the electronic tag 1 are arranged at intervals along the direction of the first rotation axis A. The reader / writer antenna 2 is configured to rotate synchronously with the electronic tag 1 along the first rotation axis A and provide excitation energy to the electronic tag 1 to activate the electronic tag 1. During the test, the reader / writer antenna 2 and the electronic tag 1 can rotate synchronously 360° along the first rotation axis A, and the reader / writer antenna 2 and the electronic tag 1 remain relatively stationary. For example, the reader / writer antenna 2 and the electronic tag 1 rotate synchronously in a horizontal plane.

[0048] When the electronic tag 1 is a linearly polarized tag, the reader / writer antenna 2 can be arranged in parallel with the electronic tag 1, so that the polarization direction of the reader / writer antenna 2 is consistent with the polarization direction of the electronic tag 1, thereby improving the transmission effect of the excitation energy and further improving the activation effect of the electronic tag. When the electronic tag 1 is a circularly polarized tag, the reader / writer antenna 2 and the electronic tag 1 can be arranged in parallel or non-parallel. In this embodiment, when the electronic tag 1 is a linearly polarized tag or a circularly polarized tag, the excitation energy provided by the reader / writer antenna 2 is obtained to ensure the activation effect of the electronic tag 1. In addition, the reader / writer antenna 2 and the electronic tag 1 are kept at an appropriate distance, which can reduce mutual interference and optimize signal strength.

[0049] Since the electronic tag 1 in this embodiment is a passive tag, the reader / writer antenna 2 must provide excitation energy to the electronic tag 1 in real time during the test, that is, during the rotation of the electronic tag 1 along the first rotation axis A, the reader / writer antenna 2 provides excitation energy to the electronic tag 1 in real time to activate the electronic tag 1 so as to test the electronic tag 1. During the test, the reader / writer antenna 2 rotates synchronously with the electronic tag 1 along the first rotation axis A, and the excitation energy provided by the reader / writer antenna 2 can be obtained in real time during the rotation of the electronic tag 1 to ensure the activation effect of the electronic tag 1.

[0050] The transceiver antenna 3 and the electronic tag 1 are spaced apart in the direction of the second rotation axis B, and the second rotation axis B is perpendicular to the first rotation axis A. The transceiver antenna 3 is configured to rotate along the second rotation axis B, and during the rotation of the electronic tag 1 and the transceiver antenna 3, send a test signal of the working frequency band of the electronic tag 1 to the activated electronic tag 1, and receive a feedback signal from the electronic tag 1.

[0051] The working frequency band of the electronic tag 1 includes 840-845MHz, 920-925MHz, 902-928MHz or 800-1000MHz. The frequency of the test signal sent by the transceiver antenna 3 to the activated electronic tag 1 is within the working frequency band of the electronic tag 1, and the frequency of the test signal can be selected according to actual needs.

[0052] During the test, the transceiver antenna 3 can rotate 360° along the second rotation axis B. For example, the second rotation axis B is a horizontal axis, and the transceiver antenna 3 rotates along the horizontal axis, that is, the transceiver antenna 3 rotates in a vertical plane. During the rotation of the transceiver antenna 3 and the electronic tag 1, the reader antenna 2 provides excitation energy to the electronic tag 1 in real time to activate the electronic tag 1. Each time the electronic tag is activated, the transceiver antenna 3 sends a test signal to the electronic tag 1, and the electronic tag 1 sends a feedback signal to the transceiver antenna 3 according to the test signal.

[0053] In this embodiment, the transceiver antenna 3 and the electronic tag 1 are arranged along the direction of the second rotation axis B, which improves the transmission effect of the signal between the transceiver antenna 3 and the electronic tag 1. The transceiver antenna 3 and the electronic tag 1 are arranged at intervals to reduce mutual interference and optimize signal strength. The plane of rotation of the transceiver antenna 3 is perpendicular to the plane of rotation of the electronic tag 1, and the feedback signal of the electronic tag 1 can be obtained from various angles in space during the rotation of the transceiver antenna 3 and the electronic tag 1.

[0054] The test device 4 is electrically connected to the transceiver antenna 3, and the test device 4 is configured to determine the antenna pattern information of the electronic tag according to the feedback signal. The antenna pattern information of the electronic tag may include antenna pattern information at various angles in space. The transceiver antenna 3 transmits the feedback signal of the electronic tag 1 obtained from various angles in space to the test device 4, and the test device 4 determines the antenna pattern information at various angles in space according to the feedback signals at various angles in space, and completes the antenna pattern test of the electronic tag.

[0055] This embodiment directly tests the antenna pattern of the electronic tag, reduces test errors, and improves test accuracy, so as to more clearly understand the radiation strength of the tag antenna in various directions, thereby clarifying the direction of improvement, reducing trial and error costs, and improving work efficiency.

[0056] The test device 4 is also configured to control the transceiver antenna 3 to send a test signal, such as controlling the sending timing of the test signal sent by the transceiver antenna 3, controlling the frequency of the test signal sent by the transceiver antenna 3, etc. The test frequency band and frequency step are set according to the test requirements. The test frequency band is within the working frequency band of the electronic tag 1, and the frequency step can be set to a smaller value, such as 0.1 MHz.

[0057] In the related art, the test bandwidth of the far-field test is relatively wide, and the frequency step setting is relatively large (such as 5MHz). This frequency step is too large for the electronic tag, and the working frequency band of the electronic tag cannot be accurately tested. The test device in this embodiment can set a finer frequency step for the electronic tag, so as to test the antenna pattern of the electronic tag at different frequencies within the working frequency band of the electronic tag, thereby improving the test accuracy.

[0058] In some embodiments, the reader / writer antenna 2 is further configured to provide excitation energy to the electronic tag 1 each time the electronic tag 1 rotates a first angle or the transceiver antenna 3 rotates a second angle. The transceiver antenna 3 is further configured to send a test signal to the activated electronic tag 1 and receive a feedback signal from the electronic tag 1 each time the electronic tag 1 rotates a first angle or the transceiver antenna 3 rotates a second angle.

[0059] During the test, the electronic tag 1 can rotate one circle (i.e., 360°) along the first rotation axis A for multiple times, and the angle of rotation of the electronic tag 1 can be the same each time, that is, the first angle is rotated each time. The first angle can be set according to actual needs. The smaller the first angle, the higher the test accuracy on the rotation plane of the electronic tag 1. The transceiver antenna 3 can rotate one circle (i.e., 360°) along the second rotation axis B for multiple times, and the angle of rotation of the transceiver antenna 3 is the same each time, that is, the second angle is rotated each time. The second angle can be set according to actual needs. The smaller the second angle, the higher the test accuracy on the rotation plane of the transceiver antenna 3. The first angle and the second angle can be the same or different. For example, the first angle and the second angle are 1° respectively.

[0060] Every time the electronic tag 1 rotates the first angle or the transceiver antenna 3 rotates the second angle, the corresponding spatial angle changes, and the reader antenna 2 provides excitation energy to the electronic tag 1 to activate the electronic tag 1. After the electronic tag 1 is activated, the transceiver antenna 3 sends a test signal to the electronic tag 1, and the electronic tag 1 sends a feedback signal to the transceiver antenna 3 according to the test signal. The electronic tag 1 transmits the feedback signal to the test device 4, and the test device 4 obtains the feedback signal corresponding to a certain spatial angle, and determines the antenna pattern information corresponding to the spatial angle, such as the gain coefficient corresponding to the spatial angle, according to the feedback signal corresponding to the spatial angle.

[0061] There are many ways to rotate the electronic tag 1 and the transceiver antenna 3 .

[0062] In some embodiments, the transceiver antenna 3 is further configured to rotate 360° stepwise at a second angle along the second rotation axis B. The electronic tag 1 is further configured to rotate 360° stepwise at a first angle along the first rotation axis A each time the transceiver antenna 3 rotates the second angle.

[0063] During the test, the transceiver antenna 3 is stationary at first, and the electronic tag 1 rotates along the first rotation axis A, and the test device 4 obtains a feedback signal every time the electronic tag 1 rotates by a first angle. After the electronic tag 1 completes a rotation of one circle (360°), the electronic tag 1 returns to the initial position, and the transceiver antenna 3 rotates by a second angle along the second rotation axis B, and the test device 4 obtains a feedback signal. Then, the transceiver antenna 3 is stationary, and the electronic tag 1 rotates along the first rotation axis A, and the test device 4 obtains a feedback signal every time the electronic tag 1 rotates by a first angle. After the electronic tag 1 completes a rotation of one circle (360°), the electronic tag 1 returns to the initial position, and the transceiver antenna 3 rotates by a second angle along the second rotation axis B again, and the test device 4 obtains a feedback signal. And so on, until the transceiver antenna 3 completes a rotation of one circle (360°) and returns to the initial position, the transceiver antenna 3 and the electronic tag 1 both stop rotating. At this time, the test device 4 can collect feedback signals corresponding to each angle in space.

[0064] For example, the first angle and the second angle are both 1°. The transceiver antenna 3 is stationary first, and the electronic tag 1 rotates 359 times (1° each time) along the first rotation axis A to return to the initial position. Then, the transceiver antenna 3 rotates 1° along the second rotation axis B and then remains stationary. The electronic tag 1 rotates 359 times (1° each time) along the first rotation axis A to return to the initial position. And so on, until the transceiver antenna 3 rotates 359 times to return to the initial position.

[0065] In some embodiments, the electronic tag 1 is further configured to rotate 360° stepwise at a first angle along the first rotation axis A. The transceiver antenna 3 is further configured to rotate 360° stepwise at a second angle along the second rotation axis B every time the electronic tag 1 rotates at the first angle.

[0066] During the test, the electronic tag 1 is stationary at first, and the transceiver antenna 3 rotates along the second rotation axis B, and the test device 4 obtains a feedback signal every time the transceiver antenna 3 rotates by the second angle. After the transceiver antenna 3 completes one rotation (360°), the transceiver antenna 3 returns to the initial position, the electronic tag 1 rotates by the first angle along the first rotation axis A, and the test device 4 obtains a feedback signal. Then, the electronic tag 1 is stationary, and the transceiver antenna 3 rotates along the second rotation axis B, and the test device 4 obtains a feedback signal every time the transceiver antenna 3 rotates by the second angle. After the transceiver antenna 3 completes one rotation (360°), the transceiver antenna 3 returns to the initial position, the electronic tag 1 rotates by the first angle again along the first rotation axis A, and the test device 4 obtains a feedback signal. And so on, until the electronic tag 1 completes one rotation (360°) and returns to the initial position, the transceiver antenna 3 and the electronic tag 1 both stop rotating. At this time, the test device 4 can collect feedback signals corresponding to each angle in space.

[0067] For example, the first angle and the second angle are both 1°. The electronic tag 1 is stationary first, and the transceiver antenna 3 rotates 359 times (1° each time) along the second rotation axis B to return to the initial position. Then, the electronic tag 1 rotates 1° along the first rotation axis A and then remains stationary. The transceiver antenna 3 rotates 359 times (1° each time) along the second rotation axis B to return to the initial position. And so on, until the electronic tag 1 rotates 359 times to return to the initial position.

[0068] In some embodiments, the normal direction of the transceiver antenna 3 is perpendicular to the normal direction of the reader antenna 2. During the test, the reader antenna 2 provides excitation energy to the electronic tag 1. In order to prevent the excitation energy provided by the reader antenna 2 from affecting the signal transmission of the transceiver antenna 3, the normal direction of the transceiver antenna 3 is set perpendicular to the normal direction of the reader antenna 2 to ensure that the signal sent by the reader antenna 2 does not interfere with the transceiver antenna 3.

[0069] In some embodiments, the reader / writer antenna 2 is a near-field antenna. In this embodiment, the reader / writer antenna 2 is set as a near-field antenna for close-range reading, so as to concentrate energy radiation in a relatively close range and improve the activation effect.

[0070] In some embodiments, the transceiver antenna 3 is a linearly polarized antenna. A linearly polarized antenna has strong directivity, and setting the transceiver antenna 3 as a linearly polarized antenna helps to accurately measure the radiation characteristics of the antenna in different directions, thereby improving the test accuracy.

[0071] In some embodiments, the electronic tag antenna pattern testing system further includes:

[0072] The first rotating structure 61 , the electronic tag 1 and the reader / writer antenna 2 are located in the first rotating structure 61 , and the first rotating structure 61 is configured to drive the electronic tag 1 and the reader / writer 2 to rotate synchronously along the first rotating axis A.

[0073] The first rotating structure 61 may include a turntable, the central axis of which is the first rotation axis A. The electronic tag 1 and the reader / writer antenna 2 are both fixed on the turntable, and the electronic tag 1 and the reader / writer antenna 2 are arranged at intervals along the direction of the first rotation axis A, that is, the electronic tag 1 is located between the turntable and the reader / writer antenna 2, or the reader / writer antenna 2 is located between the turntable and the electronic tag 1. The turntable, the electronic tag 1 and the reader / writer antenna 2 remain relatively stationary, and the turntable can rotate 360°. During the test, the turntable is controlled to rotate along the first rotation axis A, driving the electronic tag 1 and the reader / writer 2 to rotate synchronously along the first rotation axis A.

[0074] The first rotating structure 61 may include two turntables (such as a first turntable and a second turntable), the two turntables are arranged opposite to each other along the direction of the first rotation axis A, and the central axes of the two turntables are both the first rotation axis A. The electronic tag 1 and the reader / writer antenna 2 are located between the two turntables, and the electronic tag 1 is fixed on the first turntable, and the reader / writer antenna 2 is fixed on the second turntable. The electronic tag 1 and the first turntable remain relatively still, that is, the electronic tag 1 and the first turntable can rotate synchronously. The reader / writer antenna 2 and the second turntable remain relatively still, that is, the reader / writer antenna 2 and the second turntable can rotate synchronously. The two turntables remain relatively still, that is, the two turntables can rotate synchronously. Both turntables can rotate 360°. During the test, the two turntables are controlled to rotate synchronously along the first rotation axis A, so that the electronic tag 1 and the reader / writer antenna 2 rotate synchronously along the first rotation axis A. Both turntables can rotate 360°.

[0075] In some embodiments, the electronic tag antenna pattern testing system further includes:

[0076] The second rotating structure 62 , on which the transceiver antenna 3 is located, is configured to drive the transceiver antenna 3 to rotate synchronously along the second rotating axis B.

[0077] The second rotating structure 62 may include a turntable, the central axis of which is the second rotation axis B. The transceiver antenna 3 is fixed to the turntable so that the transceiver antenna 3 and the turntable remain relatively stationary. The turntable can rotate 360 ​​degrees. During the test, the turntable is controlled to rotate along the second rotation axis B, driving the transceiver antenna 3 to rotate along the second rotation axis B.

[0078] In some embodiments, the electronic tag antenna pattern testing system further includes:

[0079] The bracket 7 is located between the electronic tag 1 and the reader antenna 2, and the dielectric constant of the bracket 7 is equal to the dielectric constant of air.

[0080] In the case where the first rotating structure 61 includes a turntable, the electronic tag 1 and the reader / writer antenna 2 are both fixed on the turntable, and a bracket 7 is provided between the electronic tag 1 and the reader / writer 2 to support the electronic tag 1 or the reader / writer antenna 2. In the case where the electronic tag 1 is located between the turntable and the reader / writer antenna 2, the electronic tag 1 is located on the turntable, the bracket 7 is located on the electronic tag 1, and the reader / writer antenna 2 is located on the bracket 7, that is, the bracket 7 is used to fix the reader / writer antenna 2. In the case where the reader / writer antenna 2 is located between the turntable and the electronic tag 1, the reader / writer antenna 2 is located on the turntable, the bracket 7 is located on the reader / writer antenna 2, and the electronic tag 1 is located on the bracket 7, that is, the bracket 7 is used to fix the electronic tag 1.

[0081] The dielectric constant of the bracket 7 is equal to the dielectric constant of air, so as to prevent the bracket 7 from affecting the signal transmission between the reader antenna 2 and the electronic tag 1 .

[0082] In some embodiments, the testing device 4 comprises:

[0083] The test device 41 is electrically connected to the first rotating structure 61, the second rotating structure 62, the reader antenna 2 and the transceiver antenna 3, respectively, and is configured to control the first rotating structure 61 to rotate along the first rotating axis A, control the second rotating structure 62 to rotate along the second rotating axis B, control the reader antenna 2 to provide excitation energy, and control the transceiver antenna 3 to send a test signal, obtain a feedback signal through the transceiver antenna 3, and determine the signal strength of the feedback signal;

[0084] The host computer 42 is electrically connected to the test device 41 and is configured to determine the electronic tag antenna pattern information according to the signal strength.

[0085] The test device 41 can be set on the cabinet. The test device 41 can control the rotation of the first rotating structure 61 and the second rotating structure 62, control the signals sent by the reader antenna 2 and the transceiver antenna 3, and collect the feedback signals of the electronic tag 1 for processing and analysis. The host computer 42 can be a user terminal (such as a computer, etc.). The host computer 42 can confirm the operating program and send instructions, and can also analyze and process the information transmitted by the test device 41. The host computer 42 can be electrically connected to multiple test devices 41 through a splitter to test multiple electronic tags.

[0086] During the test, the test device 41 controls the first rotating structure 61 and the second rotating structure 62 to rotate in two perpendicular plane dimensions, respectively, thereby driving the electronic tag 1 and the transceiver antenna 3 to rotate in two perpendicular plane dimensions, respectively, and the reader antenna 2 rotates synchronously with the electronic tag 1. Each time the test device 41 controls the first rotating structure 61 or the second rotating structure 62 to rotate an angle, the reader antenna 2 is controlled to provide excitation energy to the electronic tag 1 to activate the electronic tag 1. Each time the electronic tag 1 is activated, the test device 41 controls the transceiver antenna 3 to send a test signal to the electronic tag 1, and obtains the feedback signal of the electronic tag 1 through the transceiver antenna 3. Each time the test device 41 obtains a feedback signal, it determines the spatial angle corresponding to the rotation angle of the first rotating structure 61 and the second rotating structure 62, determines the signal strength of the feedback signal, and sends the determined spatial angle and signal strength to the host computer 42. The host computer 42 determines the antenna pattern information corresponding to the spatial angle according to the signal strength corresponding to the spatial angle. The antenna pattern information may include a gain coefficient.

[0087] The host computer 42 may calculate the gain coefficient in the following manner.

[0088] According to the signal strength E(θ, φ) corresponding to the spatial angle (θ, φ), the directional pattern parameters corresponding to the spatial angle (θ, φ) are calculated. The calculation formula is as follows:

[0089]

[0090] Among them, E max is the maximum signal strength, (θ m ,φ m ) is the direction of maximum antenna radiation.

[0091] According to the formula Calculate the directivity coefficient D corresponding to the spatial angle (θ, φ).

[0092] According to the formula Calculate the gain coefficient G corresponding to the spatial angle (θ, φ). Where η a is the ratio of radiated power to input power.

[0093] After the test device 41 controls the first rotating structure 61 and the second rotating structure 62 to rotate 360° in two vertical plane dimensions respectively, the host computer 42 can determine the gain coefficient corresponding to each angle in the space.

[0094] In some embodiments, the host computer 42 is further configured to draw a three-dimensional directional pattern of the electronic tag antenna according to the directional pattern information of the electronic tag antenna.

[0095] The antenna pattern information may include a gain coefficient. After the host computer 42 determines the gain coefficients at various spatial angles, the host computer 42 may use a drawing tool to draw a three-dimensional pattern of the electronic tag antenna based on the gain coefficients at various spatial angles.

[0096] The actual measured data of this embodiment is more accurate, and can be accurately tested for a single electronic tag to obtain directional pattern data that better matches the electronic tag antenna, which is conducive to accurately analyzing the application effect of the electronic tag. Through the testing method that combines hardware and software, the hardware is responsible for signal transmission and reception and data collection, and the software further analyzes and calculates the collected data and finally draws a complete three-dimensional directional pattern.

[0097] In some embodiments, the electronic tag antenna pattern testing system further includes:

[0098] A fully anechoic chamber 8 , in which the electronic tag 1 , the reader / writer antenna 2 and the transceiver antenna 3 are located.

[0099] For example, the electronic tag 1 and the reader / writer antenna 2 are located at the bottom of the anechoic chamber 8, and the transceiver antenna 3 is located at the side wall of the anechoic chamber 8. The distance between the electronic tag 1 and the bottom of the anechoic chamber 8 can be greater than 1m to prevent the anechoic chamber 8 from affecting the signal transmission of the electronic tag 1.

[0100] The first rotating structure 61 and the second rotating structure 62 are also located in the full anechoic chamber 8. For example, the first rotating structure 61 can be located at the bottom of the full anechoic chamber 8, and the electronic tag 1 and the reader / writer antenna 2 are located on the first rotating structure 61. The second rotating structure 62 is located on the side wall of the full anechoic chamber 8, and the transceiver antenna 3 is located at the second rotating structure 62.

[0101] In this embodiment, the electronic tag 1, the reader / writer antenna 2 and the transceiver antenna 3 are arranged in a fully anechoic chamber 8, which can shield interference signals and provide a good test environment.

[0102] According to the electronic tag antenna pattern test system provided in the embodiment of the present application, the electronic tag 1 is rotated along the first rotation axis A, and the transceiver antenna 3 is rotated along the second rotation axis B, and the first rotation axis A is perpendicular to the second rotation axis B, that is, the electronic tag 1 and the transceiver antenna 3 are respectively rotated in two perpendicular plane dimensions to obtain the feedback signal of the electronic tag 1 at various angles in space, determine the antenna pattern information at various angles in space, and realize direct testing of the electronic tag antenna pattern without far-field and near-field conversion, thereby reducing test errors and improving test accuracy. In addition, the reader / writer antenna 2 and the electronic tag 1 are spaced apart and rotate synchronously along the direction of the first rotation axis A, so that the electronic tag 1 can obtain the excitation energy provided by the reader / writer antenna 2 in real time during the rotation process, thereby improving the activation effect of the electronic tag 1 and further improving the test effect.

[0103] Correspondingly, an embodiment of the present application also provides an electronic tag antenna pattern testing method, which can be applied to the electronic tag antenna pattern testing system in the above embodiment.

[0104] like Figure 2 As shown, the electronic tag antenna pattern testing method provided in the embodiment of the present application includes steps 110 to 140.

[0105] Step 110, control the electronic tag and the reader antenna to rotate synchronously along the first rotation axis, and control the transceiver antenna to rotate along the second rotation axis; the reader antenna and the electronic tag are spaced apart along the direction of the first rotation axis, and the transceiver antenna and the electronic tag are spaced apart along the direction of the second rotation axis, and the second rotation axis is perpendicular to the first rotation axis.

[0106] Step 120: Control the reader antenna to provide excitation energy to the electronic tag to activate the electronic tag.

[0107] Step 130: During the rotation of the electronic tag and the transceiver antenna, a test signal of the electronic tag working frequency band is sent to the activated electronic tag, and a feedback signal of the electronic tag is received.

[0108] Step 140: Determine the electronic tag antenna pattern information according to the feedback signal.

[0109] According to the electronic tag antenna pattern testing method provided in the embodiment of the present application, the electronic tag 1 is rotated along the first rotation axis A, and the transceiver antenna 3 is rotated along the second rotation axis B, and the first rotation axis A is perpendicular to the second rotation axis B, that is, the electronic tag 1 and the transceiver antenna 3 are respectively rotated in two perpendicular plane dimensions to obtain the feedback signal of the electronic tag 1 at various angles in space, determine the antenna pattern information at various angles in space, and realize direct testing of the electronic tag antenna pattern without far-field and near-field conversion, thereby reducing test errors and improving test accuracy. In addition, the reader / writer antenna 2 and the electronic tag 1 are spaced apart and rotate synchronously along the direction of the first rotation axis A, so that the electronic tag 1 can obtain the excitation energy provided by the reader / writer antenna 2 in real time during the rotation process, thereby improving the activation effect of the electronic tag 1 and further improving the test effect.

[0110] In some embodiments, controlling the reader antenna in step 120 to provide excitation energy to the electronic tag includes:

[0111] When the electronic tag rotates by a first angle or the transceiver antenna rotates by a second angle, the reader / writer antenna is controlled to send excitation energy to the electronic tag;

[0112] In step 130, during the rotation of the electronic tag and the transceiver antenna, a test signal of the electronic tag working frequency band is sent to the activated electronic tag, and a feedback signal of the electronic tag is received, including:

[0113] Each time the electronic tag rotates by the first angle or each time the transceiver antenna rotates by the second angle, the test signal is sent to the activated electronic tag, and a feedback signal from the electronic tag is received.

[0114] In some embodiments, controlling the electronic tag and the reader antenna to rotate synchronously along the first rotation axis, and controlling the transceiver antenna to rotate along the second rotation axis in step 110 includes:

[0115] Controlling the transceiver antenna to rotate 360° along the second rotation axis at a second angle;

[0116] Every time the transceiver antenna rotates by the second angle, the electronic tag is controlled to rotate 360° along the first rotation axis at the first angle.

[0117] In some embodiments, controlling the electronic tag and the reader antenna to rotate synchronously along the first rotation axis, and controlling the transceiver antenna to rotate along the second rotation axis in step 110 includes:

[0118] Controlling the electronic tag to rotate 360° along the first rotation axis at a first angle;

[0119] Each time the electronic tag rotates by the first angle, the transceiver antenna is controlled to rotate 360° along the second rotation axis at a second angle.

[0120] In some embodiments, determining the electronic tag antenna pattern information according to the feedback signal in step 140 includes:

[0121] determining a signal strength of the feedback signal;

[0122] The electronic tag antenna pattern information is determined according to the signal strength.

[0123] In some embodiments, the method further comprises:

[0124] A three-dimensional directional pattern of the electronic tag antenna is drawn according to the directional pattern information of the electronic tag antenna.

[0125] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0126] In the description of the present application, “plurality” means two or more.

[0127] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0128] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electronic tag antenna pattern test system, characterized in that: include: The electronic tag is configured to rotate along a first rotation axis; a reader / writer antenna, arranged at intervals from the electronic tag along the direction of the first rotation axis, configured to rotate synchronously with the electronic tag along the first rotation axis, and to provide excitation energy to the electronic tag to activate the electronic tag; a transceiver antenna, which is spaced apart from the electronic tag along a second rotation axis, and is configured to rotate along the second rotation axis, and to send a test signal of the electronic tag working frequency band to the activated electronic tag and receive a feedback signal of the electronic tag during the rotation of the electronic tag and the transceiver antenna; the second rotation axis is perpendicular to the first rotation axis; The testing device is electrically connected to the transceiver antenna and is configured to determine the electronic tag antenna pattern information according to the feedback signal.

2. The electronic tag antenna pattern test system according to claim 1, characterized in that: The reader / writer antenna is further configured to provide excitation energy to the electronic tag every time the electronic tag rotates by a first angle or every time the transceiver antenna rotates by a second angle; The transceiver antenna is further configured to send the test signal to the activated electronic tag and receive a feedback signal from the electronic tag each time the electronic tag rotates by the first angle or each time the transceiver antenna rotates by the second angle.

3. The electronic tag antenna pattern test system according to claim 2, characterized in that: The transceiver antenna is further configured to rotate 360° along the second rotation axis at a second angle in steps; The electronic tag is further configured to rotate 360° along the first rotation axis at the first angle every time the transceiver antenna rotates at the second angle; or, The electronic tag is further configured to rotate 360° along the first rotation axis at a first angle in steps; The transceiver antenna is further configured to rotate 360° along the second rotation axis at a second angle every time the electronic tag rotates at the first angle.

4. The electronic tag antenna pattern test system according to claim 1, characterized in that: The normal direction of the transceiver antenna is perpendicular to the normal direction of the reader antenna.

5. The electronic tag antenna pattern test system according to claim 1, characterized in that: The reader / writer antenna is a near-field antenna, and the transceiver antenna is a linearly polarized antenna.

6. The electronic tag antenna pattern test system according to claim 1, characterized in that: The electronic tag antenna pattern test system also includes: A first rotating structure, the electronic tag and the reader / writer antenna are located in the first rotating structure, and the first rotating structure is configured to drive the electronic tag and the reader / writer to rotate synchronously along the first rotating axis; A second rotating structure, the transceiver antenna is located in the second rotating structure, and the second rotating structure is configured to drive the transceiver antenna to rotate synchronously along the second rotating axis.

7. The electronic tag antenna pattern test system according to claim 6, characterized in that: The electronic tag antenna pattern test system also includes: The bracket is located between the electronic tag and the reader antenna, and the dielectric constant of the bracket is equal to the dielectric constant of air.

8. The electronic tag antenna pattern test system according to claim 6, characterized in that: The testing device comprises: a test device, electrically connected to the first rotating structure, the second rotating structure, the reader / writer antenna and the transceiver antenna, respectively, and configured to control the first rotating structure to rotate along the first rotating axis, control the second rotating structure to rotate along the second rotating axis, control the reader / writer antenna to provide the excitation energy, and control the transceiver antenna to send the test signal, obtain the feedback signal through the transceiver antenna, and determine the signal strength of the feedback signal; The host computer is electrically connected to the test device and is configured to determine the electronic tag antenna pattern information according to the signal strength.

9. The electronic tag antenna pattern test system according to claim 8, characterized in that: The host computer is further configured to draw a three-dimensional directional pattern of the electronic tag antenna according to the directional pattern information of the electronic tag antenna.

10. The electronic tag antenna pattern test system according to any one of claims 1 to 9, characterized in that: The electronic tag antenna pattern test system also includes: A fully anechoic chamber, wherein the electronic tag, the reader / writer antenna and the transceiver antenna are located.

11. A method for testing the antenna pattern of an electronic tag, characterized in that: include: Control the electronic tag and the reader / writer antenna to rotate synchronously along a first rotation axis, and control the transceiver antenna to rotate along a second rotation axis; the reader / writer antenna and the electronic tag are arranged at intervals along the direction of the first rotation axis, the transceiver antenna and the electronic tag are arranged at intervals along the direction of the second rotation axis, and the second rotation axis is perpendicular to the first rotation axis; Controlling the reader / writer antenna to provide excitation energy to the electronic tag to activate the electronic tag; During the rotation of the electronic tag and the transceiver antenna, a test signal of the electronic tag working frequency band is sent to the activated electronic tag, and a feedback signal of the electronic tag is received; The electronic tag antenna pattern information is determined according to the feedback signal.

Images