Millimeter wave total radiated power and receive sensitivity test apparatus and method

Abstract

The application discloses a kind of millimeter wave total radiation power and receiving sensitivity test method, including test device, test device includes electromagnetic shielding unit, resonance control unit, signal generation unit, signal detection unit, processor and communication simulator.Electromagnetic shielding unit provides clean electromagnetic environment and efficient electromagnetic wave reflection plane;Resonance control unit contains at least a set of stirrer and controller, angle control is implemented, so that electromagnetic wave in electromagnetic shielding unit produces different reflection path;Signal generation unit is used to generate electromagnetic wave signal, and is input to the transmitting antenna in electromagnetic shielding unit by radio frequency line;Signal detection unit is received by the receiving antenna in electromagnetic shielding unit electromagnetic wave signal, is transmitted out by radio frequency cable, and voltage amplitude is measured;Communication simulator is used to establish communication connection with millimeter wave device under test;Processor establishes data model according to the data provided by signal detection unit, and also can obtain the data required for detection by model calculation, record and display.

Description

Technical Field

[0001] The present invention relates to the field of electronic measurement technology, and in particular to a device and method for testing millimeter wave total radiation power and receiving sensitivity that supports calibration testing. Background Art

[0002] Millimeter-wave technology is rapidly developing and widely used in 5G communications, the Internet of Things, and the Internet of Vehicles. As a result, the devices used for millimeter-wave transmission vary in size, posing significant challenges to millimeter-wave measurement. Currently, mature millimeter-wave testing techniques typically involve manufacturers testing millimeter-wave antennas, measuring various detailed parameters to ensure they meet standard requirements.

[0003] Application number CN201821621369.4 discloses a millimeter wave testing system, including a product under test, a receiving antenna, a spectrum analyzer and a computer; the output end of the product under test sends a signal to the input end of the receiving antenna, the output end of the receiving antenna is connected to the input end of the spectrum analyzer through a first cable, and the output end of the spectrum analyzer is connected to the input end of the computer through a second cable. At the same time, a signal amplifier is set between the receiving antenna and the spectrum analyzer to amplify the millimeter wave signal.

[0004] The above solution does not consider the impact of the measurement site on the test results, and does not consider the impact of the size and presence of the device under test 6 on the test results, thereby reducing the reliability of the test results.

[0005] The paper "Simulation and Analysis of Reverberation Chamber Field Uniformity" was published on March 6, 2006 by Beijing University of Posts and Telecommunications. It is a master's degree thesis by Mai Wanghe. The paper "Simulation Analysis of Field Uniformity Distribution in the Reverberation Chamber Test Area" has the doi code: 1013336 / j10036525hve200808040 and was published in "High Voltage Technology" in August 2008. The authors are Zhang Chenghuai and Wei Guanghui, which disclosed the technical content of calibration test on the field in the test chamber. Summary of the Invention

[0006] In response to the above technical problems, the present invention proposes a millimeter wave total radiation power and receiving sensitivity testing device and method that support calibration testing.

[0007] A millimeter-wave total radiated power and receiving sensitivity test device includes an electromagnetic shielding unit, a resonance control unit, and a processor. The electromagnetic shielding unit isolates ambient electromagnetic noise and forms a closed test chamber. The electromagnetic shielding unit is provided with electromagnetic signal input and output interfaces. The resonance control unit includes a stirrer and a rotation controller. The processor is connected to the rotation controller to control the operation of the stirrer.

[0008] The electromagnetic shielding unit is characterized in that: the electromagnetic shielding unit is provided with a transmitting antenna and a receiving antenna, the receiving antenna is located in a test area in a cavity of the electromagnetic shielding unit, and the transmitting antenna is located outside the test area in the cavity of the electromagnetic shielding unit.

[0009] The device further comprises a communication simulator and a communication antenna for total radiation power and receiving sensitivity tests, the communication simulator is located outside the electromagnetic shielding unit and connected with the processor, the communication antenna is located in the test cavity of the electromagnetic shielding unit and outside the test area, and the communication simulator is connected with the communication antenna through a communication cable.

[0010] The device further comprises a signal detection unit for receiving signals and transmitting the signals to the processor, the signal detection unit is located outside the electromagnetic shielding unit and connected with the receiving antenna.

[0011] The device further comprises a signal generation unit connected with the processor, the signal generation unit is located outside the electromagnetic shielding unit and connected with the transmitting antenna.

[0012] The device is characterized in that: the electromagnetic shielding unit is a shielding room or a Faraday cage capable of shielding electromagnetic waves, and a high-efficiency electromagnetic wave reflection plane is laid inside the electromagnetic shielding unit.

[0013] The device is characterized in that: the resonance control unit comprises at least one stirrer and a rotation controller, the stirrer is used to fully stir electromagnetic waves in the test cavity, so that the test cavity meets the requirements of statistical uniformity, isotropy and random polarization of electromagnetic environment with a certain uncertainty.

[0014] The method for testing a device by using the device is characterized in that: the method comprises the following steps:

[0015] S1: cavity calibration in the test cavity is performed, a plurality of reference points are selected at the edge and inside of the test area, and the following measurements are performed;

[0016] The processor controls the signal generation unit to transmit signals, controls the resonance control unit to stir electromagnetic signals in the test cavity with a sample total number N, and the signal detection unit receives signals at one of the reference points through the receiving antenna to obtain an open area power transfer factor G ref,t .

[0017]

[0018]

[0019]

[0020] Wherein,

[0021] N is the total number of stirring samples;

[0022] F is the total number of frequency samples;

[0023] f is the frequency sample;

[0024] n is the mode stirring sample;

[0025] S 21 (f, n) is the power loss value between the signal transmitting unit and the signal detection unit 4 at the frequency f and the stirrer position n;

[0026] e mismatc,meas is the receiving antenna impedance mismatch parameter of the signal detection unit in the measurement area;

[0027] e mismatc,ref is the impedance mismatch parameter of the transmitting antenna of the signal generating unit in the test cavity;

[0028] S 11r is the receiving antenna standing wave;

[0029] S 11t is the transmitting antenna standing wave;

[0030] η meas is the receiving antenna radiation efficiency;

[0031] η ref is the transmitting antenna radiation efficiency;

[0032] Further, the position of the receiving antenna of the signal detection unit is moved, and the power transfer factor G ref,t of all reference points is sequentially measured;

[0033] The standard deviation of the power transfer factor G ref ,t of all reference points is calculated, and if the value is within the required accuracy range, the model is established; otherwise, the total number of samples N is adjusted so that the standard deviation value of the power transfer factor G ref，t of the empty field is within the required range;

[0034] In the processor, a resonance control unit stirring mode and rotation speed data model is established under the condition that the standard deviation value of the power transfer factor G ref ,t is within the required range;

[0035] S2: Field confirmation, calibration before testing in the test cavity: place the device under test in the test area in the test cavity, the processor controls the signal generating unit to transmit signals, according to the resonance control unit stirring mode and rotation speed data model established in step S1, the processor controls the resonance control unit to stir, the receiving antenna receives signals, and the power transfer factor G ref is calculated;

[0036]

[0037] wherein,

[0038] N is the total number of stirring samples;

[0039] F is the total number of frequency samples;

[0040] f is the frequency sample;

[0041] n is the mode stirring sample;

[0042] S 21 (f, n) is the power loss value between the signal transmitting unit and the signal detecting unit at frequency f and stirring position n;

[0043] η meas is the radiation efficiency of the receiving antenna;

[0044] η ref is the radiation efficiency of the transmitting antenna;

[0045] S3: Establish a stable communication link between the communication simulator and the device under test, turn off the signal generating unit, and connect the input end of the transmitting antenna to the impedance;

[0046] The test is performed in one of the following two ways:

[0047] The first total radiated power test: the communication simulator and the device under test establish a stable communication, the device under test transmits a signal, the communication simulator receives the signal, the processor controls the resonance control unit to stir according to the stirring mode and the rotation speed data model established in step S1, the signal detecting unit measures the electromagnetic detection data and sends it to the processor, and the processor calculates the average value according to the detection data sent back by the signal detecting unit to calculate the maximum transmission power P TRP of the device under test.

[0048]

[0049]

[0050] wherein,

[0051] N is the total number of stirring samples;

[0052] n is the mode stirring sample;

[0053] P n is the output result value of the signal detecting unit at mode stirring position n;

[0054] G ref is the power transfer factor calculated in step 2 after the device under test is placed.

[0055] e mismatc,meas is the impedance mismatch parameter of the receiving antenna in the measurement area for the signal detection unit;

[0056] η meas is the radiation efficiency of the receiving antenna;

[0057] G cable is the power loss between the receiving antenna and the signal detection unit;

[0058] S 11r is the standing wave ratio of the receiving antenna;

[0059] Second receiving sensitivity test: the communication simulator establishes stable communication with the device under test, sets the communication simulator to measure the bit error rate or throughput, the communication simulator transmits a signal, the processor controls the resonance control unit to stir according to the stirring mode and rotation speed data model established in step S1, the device under test receives the signal, the signal detection unit measures the electromagnetic detection data of the device under test through the receiving antenna and sends it to the processor, the processor gradually reduces the transmission power of the communication simulator according to the detection data sent back by the signal detection unit until the bit error rate is lower than the target value or the throughput is higher than the target value, and the processor calculates the measurement result sensitivity P TIS .

[0060]

[0061]

[0062] wherein,

[0063] N is the total number of samples of the stirrer;

[0064] n is the mode stirring sample;

[0065] P BSS (n) is the output power of the communication simulator when the stirrer position is n;

[0066] G ref is the power transfer factor calculated in step S2 after the device under test is placed;

[0067] e mismatc,meas is the impedance mismatch parameter of the receiving antenna in the measurement area for the signal detection unit;

[0068] η meas is the radiation efficiency of the receiving antenna;

[0069] G cable is the power loss of the radio frequency cable between the receiving antenna and the signal detection unit;

[0070] S 11ris a receiving antenna standing wave.

[0071] Advantages:

[0072] 1. By setting the signal generating unit, the communication simulator, the communication antenna and the processor, the system can support cavity calibration in the test cavity and pre-test calibration in the test cavity.

[0073] 2. By performing cavity calibration in the test cavity and pre-test calibration in the test cavity before testing, the uniform influence of the measured device on the electromagnetic environment space of the resonant cavity is considered, and the reliability of the test results is improved. BRIEF DESCRIPTION OF DRAWINGS

[0074] Figure 1 is a schematic diagram of the principle of the present application.

[0075] Figure 2 is a schematic diagram of the data modeling electromagnetic emission path of the present application.

[0076] Figure 3 is a schematic diagram of the measurement results when there is no mode stirring.

[0077] Figure 4 is a schematic diagram of the measurement results when there are multiple angle mode stirring samples.

[0078] Figure 5 is a schematic diagram of the total radiation power test mode electromagnetic wave path of the present application.

[0079] In the figure, 1 is an electromagnetic shielding unit; 2 is a resonance control unit; 21 is a stirrer; 3 is a signal generating unit; 31 is a transmitting antenna; 4 is a signal detection unit; 41 is a receiving antenna; 5 is a communication simulator; 51 is a communication antenna; 6 is a measured device; 7 is a processor. DETAILED DESCRIPTION

[0080] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0081] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0082] As Figures 1 to 5As shown, a kind of millimeter wave total radiated power and receiving sensitivity test device, including electromagnetic shielding unit 1, resonance control unit 2 and processor 7, the electromagnetic shielding unit 1 isolates environmental electromagnetic noise and forms enclosed test cavity 11, electromagnetic shielding unit 1 is equipped with electromagnetic signal input and output interface;Resonance control unit 2 includes stirrer 21 and rotation controller, the processor 7 is connected with rotation controller to control stirrer 21 operation;

[0083] It is characterized in that: the electromagnetic shielding unit is provided with transmitting antenna 31 and receiving antenna 41, receiving antenna 41 is located in the test area in the cavity of electromagnetic shielding unit 1, and transmitting antenna 31 is located outside the test area in the cavity of electromagnetic shielding unit 1;

[0084] It further includes communication simulator 5 and communication antenna 51 for total radiated power and receiving sensitivity test, communication simulator 5 is located outside the electromagnetic shielding unit 1 and is connected with the processor 7, communication antenna 51 is located in the test cavity 11 of the electromagnetic shielding unit 1 and is located outside the test area, and communication simulator 5 is connected with communication antenna 51 by communication cable;

[0085] It further includes signal detection unit 4 for receiving signal and transmitting to the processor 7, signal detection unit 4 is located outside the electromagnetic shielding unit 1 and is connected with the receiving antenna 41 in communication;

[0086] It further includes signal generation unit 3 connected with the processor 7, signal generation unit 3 is located outside the electromagnetic shielding unit 1 and is connected with the transmitting antenna 31 in communication.

[0087] In the present application, the electromagnetic shielding unit is a shielding chamber or a Faraday cage that can realize electromagnetic shielding function, and high-efficiency electromagnetic wave reflection planes are laid inside.

[0088] In the present application, the resonance control unit includes at least one set of stirrer and rotation controller, and the stirrer is used to sufficiently stir electromagnetic waves in the test cavity, so that the test cavity meets the statistical uniformity, isotropy and random polarization electromagnetic environment with certain uncertainty requirement.

[0089] A method for testing millimeter wave total radiated power and receiving sensitivity of a device under test, comprising the following steps:

[0090] S1: cavity calibration in test cavity 11 is carried out, and a plurality of reference points are selected on the edge and inside of the test area to carry out the following measurement;

[0091] Processor 7 controls signal generating unit 3 to transmit signals, processor 7 controls resonance control unit 2 to stir the electromagnetic signals in stirring test cavity 11 with total number of samples N (total number of samples N is provided as reference in the device description or is estimated according to the experience of the field test), signal detecting unit 4 receives signals at one of the reference points through receiving antenna 41, and obtains the power transfer factor G of the empty field ref,t ;

[0092]

[0093]

[0094]

[0095] wherein,

[0096] N is the total number of stirred samples;

[0097] F is the total number of frequency samples;

[0098] f is the frequency sample;

[0099] n is the mode stirring sample;

[0100] S 21 (f, n) is the power loss value between signal generating unit 3 and signal detecting unit 4 when frequency f is at stirrer position n;

[0101] e mismatc,meas is the impedance mismatch parameter of receiving antenna 41 of signal detecting unit 4 in the measurement area;

[0102] e mismatc,ref is the impedance mismatch parameter of transmitting antenna 31 of signal generating unit 3 in the test cavity;

[0103] S11r is the receiving antenna standing wave;

[0104] S 11t is the transmitting antenna standing wave;

[0105] η meas is the receiving antenna radiation efficiency;

[0106] η ref is the transmitting antenna radiation efficiency;

[0107] Further, the position of receiving antenna 41 of signal detecting unit 4 is moved, and the power transfer factor G of all reference points is measured in turn ref,t ;

[0108] The power transfer factors G of all reference points are calculated ref ,tthe standard deviation of the power transfer factor G ref,t is within the required range;

[0109] the power transfer factor G ref,t is within the required range;

[0110] S2: Site confirmation, pre-test calibration: the device under test 6 is placed in the test area within the test chamber 11, the processor 7 controls the signal generation unit 3 to emit a signal, according to the stirring mode and rotational speed data model of the resonance control unit 2 established in step S1, the processor 7 controls the stirring of the resonance control unit 2, and the receiving antenna 41 receives the signal, and the power transfer factor G ref is calculated;

[0111]

[0112] wherein,

[0113] N is the total number of stirring samples;

[0114] F is the total number of frequency samples;

[0115] f is the frequency sample;

[0116] n is the mode stirring sample;

[0117] S 21 (f,n) is the power loss value between the signal generation unit 3 and the signal detection unit 4 when the frequency f is at the stirrer position n;

[0118] η meas is the radiation efficiency of the receiving antenna;

[0119] η ref is the radiation efficiency of the transmitting antenna;

[0120] S3: Establish a stable communication link between the communication simulator 5 and the device under test 6, turn off the signal generation unit 3, and connect the input end of the transmitting antenna 31 to the impedance;

[0121] The test is performed in one of the following two ways:

[0122] The first total radiation power test: the communication simulator 5 establishes stable communication with the measured device 6, the measured device 6 transmits signals, the communication simulator 5 receives the signals, the processor 7 controls the resonance control unit 2 to stir according to the stirring mode and the rotation speed data model of the resonance control unit 2 established in the S1 step, the signal detection unit 4 measures the electromagnetic detection data and sends it to the processor 7, and the processor 7 calculates the average value according to the detection data sent back by the signal detection unit 4 to calculate the maximum transmission power P of the measured device 6 TRP ;

[0123]

[0124]

[0125] wherein,

[0126] N is the total number of samples of the stirrer;

[0127] n is the mode stirring sample;

[0128] P n is the output result value of the signal detection unit 4 when the mode stirring n position is reached;

[0129] G ref is the power transfer factor calculated in step 2 after the measured device is placed;

[0130] e mismatc,meas is the impedance mismatch parameter of the receiving antenna 41 of the signal detection unit 4 in the measurement area;

[0131] η meas is the radiation efficiency of the receiving antenna 41;

[0132] G cable is the power loss between the receiving antenna and the signal detection unit 4;

[0133] S 11r is the standing wave of the receiving antenna;

[0134] The second receiving sensitivity test: the communication simulator 5 establishes stable communication with the measured device 6, and sets the communication simulator to measure the bit error rate or throughput; the communication simulator 5 transmits signals, the processor 7 controls the resonance control unit 2 to stir according to the stirring mode and the rotation speed data model of the resonance control unit 2 established in the S1 step, the measured device 6 receives the signals, the signal detection unit 4 measures the electromagnetic detection data of the measured device 6 through the receiving antenna 41 and sends it to the processor 7; the processor gradually reduces the transmission power of the communication simulator 5 according to the detection data sent back by the signal detection unit 4 until the bit error rate is lower than the target value or the throughput is higher than the target value; the processor 7 calculates the measurement result sensitivity P TIS .

[0135]

[0136]

[0137] wherein,

[0138] N is the total number of samples of the stirrer;

[0139] n is the stirred sample of the mode;

[0140] P BSS (n) is the output power of the communication simulator 5 when the stirrer position is n;

[0141] G ref is the power transfer factor calculated in step S2 after the DUT is placed;

[0142] e mismatc,meas is the impedance mismatch parameter of the receiving antenna received by the signal detection unit 4 in the measurement area;

[0143] η meas is the radiation efficiency of the receiving antenna;

[0144] G cable is the power loss of the radio frequency cable between the receiving antenna and the signal detection unit 4;

[0145] S 11r is the standing wave of the receiving antenna.

[0146] Working principle: The device first generates a signal from the signal generation unit 3, which is controlled by the angle of the resonance control unit 2, so that the signal measured by the signal detection unit 4 forms a corresponding stable relationship, and a data calculation model is established. Further, the DUT 6 and the communication simulator 5 establish a stable communication link, and the resonance control unit 2 moves according to the model motion law requirements, and the data obtained by the signal detection unit 4 is output to the processor 7 to obtain the test result.

[0147] The device can test the total radiation power and receiving sensitivity of the millimeter wave device in the electromagnetic shielding unit.

[0148] When working, site calibration confirmation is required, and a test model is established to calculate the power transfer factor G ref , and a stirring data model for testing is established;

[0149]

[0150] At this time, the DUT 6 is placed in the test area of the electromagnetic shielding unit 1 and is not connected with the communication simulator; as shown, the transmitting antenna transmits electromagnetic waves through each path reflection propagation; Figure 2

[0151] ​Further, the stirring mode and the rotation speed data model established by the resonance control unit 2 according to step S1 change the electromagnetic wave propagation path by controlling the stirring angle and mode, so as to achieve electromagnetic wave amplitude in different directions, such as Figure 4 As shown in the figure, the more the stirring angle, the more the data elements obtained by the signal detection unit 4;

[0152] Further, if the signal detection unit 4 needs multi-point measurement, the above steps are repeated multiple times to record the multi-point measurement data.

[0153] Further, according to the transmission power of the signal generation unit 3, the motion trajectory of the resonance control unit 2, and the measurement data of at least one position of the stirrer obtained by the signal detection unit 4, the processor 7 establishes a stirring data model for testing.

[0154] After the data model for testing is determined, the testing process is prepared, at this time, the communication simulator 5 and the millimeter wave device under test 6 establish a stable communication link, the signal generation unit 3 signal is closed, the transmission antenna input port is terminated with a 50 ohm impedance, and the preparation work for testing is completed, as shown in Figure 5 .

[0155] Further, the data model established by the processor 7 controls the resonance control unit 2 to move according to the model, and the signal detection unit 4 detects the data and inputs the measurement results to the processor 7.

[0156] The first kind: total radiation power measurement, when the communication simulator 5 and the device under test 6 establish a stable communication, and control the communication simulator 5 to achieve maximum power transmission on the communication channel, control the resonance control unit 2 with the same model data at each sampling point, and the data obtained by the signal detection unit 4 is processed by the processor 7 to calculate the average value, for example:

[0157]

[0158] The total radiation power result value is obtained.

[0159] The second kind: receive sensitivity measurement, after the communication simulator 5 and the millimeter wave device under test 6 establish a stable communication link, set the communication simulator to measure the bit error rate or throughput;

[0160] Further, gradually reduce the transmission power of the communication simulator until the minimum power that makes the bit error rate lower than the target value or the throughput higher than the target value is found, and repeat the resonance control unit 2 in the model data at each sampling point, and the processor 7 calculates according to the model, for example:

[0161]

[0162] The receive sensitivity result value is output.

[0163] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent substitutions or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A millimeter wave total radiated power and receiving sensitivity test device, comprising an electromagnetic shielding unit (1), a resonance control unit (2), and a processor (7), wherein the electromagnetic shielding unit (1) isolates environmental electromagnetic noise and forms a closed test cavity (11), and the electromagnetic shielding unit (1) is provided with an electromagnetic signal input and output interface; the resonance control unit (2) comprises a stirrer (21) and a rotation controller, and the processor (7) is connected to the rotation controller to control the operation of the stirrer (21); Its characteristics are: A transmitting antenna (31) and a receiving antenna (41) are provided in the electromagnetic shielding unit, the receiving antenna (41) is located in a test area in the cavity of the electromagnetic shielding unit (1), and the transmitting antenna (31) is located outside the test area in the cavity of the electromagnetic shielding unit (1); It also includes a communication simulator (5) and a communication antenna (51) for testing total radiated power and receiving sensitivity. The communication simulator (5) is located outside the electromagnetic shielding unit (1) and is connected to the processor (7). The communication antenna (51) is located in the test cavity (11) of the electromagnetic shielding unit (1) and outside the test area. The communication simulator (5) is connected to the communication antenna (51) via a communication cable. It also includes a signal detection unit (4) for receiving signals and transmitting them to the processor (7), the signal detection unit (4) being located outside the electromagnetic shielding unit (1) and being connected to the receiving antenna (41) for communication; It also includes a signal generating unit (3) connected to the processor (7), the signal generating unit (3) being located outside the electromagnetic shielding unit (1) and being connected to communicate with the transmitting antenna (31); The processor (7) controls the resonance control unit (2) to stir according to the stirring mode and rotation speed data model of the resonance control unit (2) established in step S1; S1: Perform cavity calibration in the test cavity, select multiple reference points at the edge and inside of the test area to perform the following measurements; The processor controls the signal generating unit to transmit the signal, and the processor controls the resonance control unit to stir the electromagnetic signal in the test cavity with a total number of samples N. The signal detection unit receives the signal at one of the reference points through the receiving antenna to obtain the empty space power transfer factor G. ref,t ; in, N is the total number of samples stirred; F is the total number of frequency samples; f is the frequency sample; n is the mode-stirred sample; S21(f,n) is the power loss value between the signal transmitting unit and the signal detecting unit (4) when the frequency f is at the stirrer position n; e mismatc,meas is the receiving antenna impedance mismatch parameter of the signal detection unit in the measurement area; e mismatc,ref The impedance mismatch parameter of the transmitting antenna of the signal generating unit in the test cavity; S 11r is the receiving antenna standing wave; S 11t is the transmitting antenna standing wave; η meas is the receiving antenna radiation efficiency; η ref is the radiation efficiency of the transmitting antenna; Furthermore, a data calculation model is established, the position of the receiving antenna of the mobile signal detection unit is moved, and the power transfer factor G of all reference points is measured in turn. ref,t ; Calculate the power transfer factor G at all reference points ref,t If the standard deviation of is within the required accuracy range, the model is established; otherwise, adjust the total number of samples N so that the power transfer factor of the empty field G ref,t The standard deviation of is within the required range; Establishing the power transfer factor G within the processor ref,t The standard deviation value of the resonance control unit stirring mode and rotation speed data model is within the required range.

2. The millimeter wave total radiated power and receiving sensitivity testing device according to claim 1, characterized in that: The electromagnetic shielding unit is a shielding room or a Faraday cage that can achieve electromagnetic shielding function, and a high-efficiency electromagnetic wave reflecting plane is laid inside.

3. The millimeter wave total radiated power and receiving sensitivity testing device according to claim 1, characterized in that: The resonance control unit includes at least one set of stirrers and rotation controllers. The stirrers are used to fully stir the electromagnetic waves in the test cavity so that the test cavity meets a statistically uniform, isotropic and randomly polarized electromagnetic environment with certain uncertainty requirements.

4. A method for measuring a device under test using the millimeter wave total radiated power and receiving sensitivity test device according to claim 3, characterized in that: The following steps are involved: S1: Perform cavity calibration in the test cavity. Select multiple reference points at the edge and inside of the test area and perform the following measurements. The processor controls the signal generating unit to transmit the signal, and the processor controls the resonance control unit to stir the electromagnetic signal in the test cavity with a total number of samples N. The signal detection unit receives the signal at one of the reference points through the receiving antenna to obtain the empty space power transfer factor G. ref,t ; in, N is the total number of samples stirred; F is the total number of frequency samples; f is the frequency sample; n is the mode-stirred sample; S21(f,n) is the power loss value between the signal transmitting unit and the signal detecting unit (4) when the frequency f is at the stirrer position n; e mismatc,meas is the receiving antenna impedance mismatch parameter of the signal detection unit in the measurement area; e mismatc,ref The impedance mismatch parameter of the transmitting antenna of the signal generating unit in the test cavity; S 11r is the receiving antenna standing wave; S 11t is the transmitting antenna standing wave; η meas is the receiving antenna radiation efficiency; η ref is the radiation efficiency of the transmitting antenna; Furthermore, a data calculation model is established, the position of the receiving antenna of the mobile signal detection unit is moved, and the power transfer factor G of all reference points is measured in turn. ref,t ; Calculate the power transfer factor G at all reference points ref,t If the standard deviation of is within the required accuracy range, the model is established; otherwise, adjust the total number of samples N so that the power transfer factor of the empty field G ref,t The standard deviation of is within the required range; Establishing the power transfer factor G within the processor ref,t The standard deviation of the resonance control unit is within the required range, and the stirring mode and rotation speed data model; S2: Site confirmation and pre-test calibration in the test chamber: The device under test is placed in the test area of ​​the test chamber. The processor controls the signal generating unit to transmit the signal. According to the stirring mode and rotation speed data model of the resonance control unit established in step S1, the processor controls the resonance control unit to stir. The receiving antenna receives the signal and calculates the power transfer factor G. ref ; in, N is the total number of samples stirred; F is the total number of frequency samples; f is the frequency sample; n is the mode-stirred sample; S 21 (f,n) is the power loss between the signal transmitting unit and the signal detecting unit when the frequency f is at the stirrer position n; e mismatc,meas is the receiving antenna impedance mismatch parameter of the signal detection unit in the measurement area; e mismatc,ref The impedance mismatch parameter of the transmitting antenna of the signal generating unit in the test cavity; η meas is the receiving antenna radiation efficiency; η ref is the radiation efficiency of the transmitting antenna; S3: A stable communication link is established between the communication simulator (5) and the device under test (6), the signal generating unit (3) is turned off, and an impedance is connected to the input end of the transmitting antenna (31); Perform the test in one of two ways: The first total radiation power test: the communication simulator (5) establishes stable communication with the device under test (6), the device under test (6) transmits a signal, the communication simulator (5) receives the signal, the processor (7) controls the resonance control unit (2) to stir according to the stirring mode and rotation speed data model of the resonance control unit (2) established in step S1, the signal detection unit (4) measures the electromagnetic detection data and sends it to the processor (7), the processor (7) performs mean calculation based on the detection data sent back by the signal detection unit (4), and calculates the maximum transmission power P of the device under test (6) TRP ; in, N is the total number of samples in the blender; n is the mode-stirred sample; P n The output result value of the signal detection unit (4) when the mode stirring position is n; G ref After placing the device under test, execute the power transfer factor calculated in step 2; e mismatc,meas An impedance mismatch parameter of a receiving antenna (41) within a measurement area of ​​a signal detection unit (4); η meas is the radiation efficiency of the receiving antenna (41); G cable is the power loss between the receiving antenna and the signal detection unit (4); S 11r is the receiving antenna standing wave; The second receiving sensitivity test: the communication simulator (5) establishes stable communication with the device under test (6), and the communication simulator is set to measure the bit error rate or throughput; the communication simulator (5) transmits a signal, the processor (7) controls the resonance control unit (2) to stir according to the stirring mode and rotation speed data model of the resonance control unit (2) established in step S1, the device under test (6) receives the signal, and the signal detection unit (4) measures the electromagnetic detection data of the device under test (6) through the receiving antenna (41) and sends it to the processor (7); the processor gradually reduces the transmission power of the communication simulator (5) according to the detection data sent back by the signal detection unit (4) until the bit error rate is lower than the target value or the throughput is higher than the target value; the processor (7) calculates the sensitivity P of the measurement result TIS ; in, N is the total number of samples in the blender; n is the mode-stirred sample; P BSS (n) is the output power of the communication simulator (5) when the stirrer position is n; G ref After the device under test is placed, the power transfer factor calculated in step S2 is executed; e mismatc,meas The signal detection unit (4) receives an impedance mismatch parameter of an antenna within a measurement area; η meas is the receiving antenna radiation efficiency; G cable The power loss of the radio frequency cable between the receiving antenna and the signal detection unit (4); S 11r is the receiving antenna standing wave.

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