CN110470915B

CN110470915B - Circularly polarized antenna test system, calibration and signal test method

Info

Publication number: CN110470915B
Application number: CN201910681737.7A
Authority: CN
Inventors: 郑楷; 邱忠云; 李碧雄; 唐凯; 郭凡玉; 佘影
Original assignee: Chengdu T Ray Technology Co Ltd
Current assignee: Chengdu T Ray Technology Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2021-09-10
Anticipated expiration: 2039-07-26
Also published as: CN110470915A

Abstract

The invention discloses a circularly polarized antenna test system, a calibration and signal test method, which not only can quickly realize the calibration test of the test system, but also can further obtain the signal radiation test results of the circularly polarized antenna to be tested on different polarization direction links by adopting a mode of simultaneous measurement and comprehensive analysis on the basis of system calibration data by arranging a double-linear polarized antenna comprising a first linear polarized antenna and a second linear polarized antenna with mutually vertical polarization directions, a first vector network analysis module connected with the circularly polarized antenna to be tested, a second vector network analysis module connected with the first linear polarized antenna and a third vector network analysis module connected with the second linear polarized antenna, and carrying out different control and analysis operations on the circularly polarized antenna to be tested and the dual polarized antenna in the test process through each vector network analysis module, compared with the conventional circular polarization antenna test method, the test method has the advantages of higher test speed and higher test precision.

Description

Circularly polarized antenna test system, calibration and signal test method

Technical Field

The invention relates to the technical field of millimeter wave frequency band antenna mounting structure integration, in particular to a circularly polarized antenna test system and a calibration and signal test method.

Background

In the field of modern communication applications, circularly polarized antennas are increasingly used in various communication systems because of their low orientation sensitivity to antennas and their good quality of transmitting and receiving signals. The characteristic realization of the circularly polarized antenna needs that the antenna can simultaneously excite two orthogonal linear polarized waves with the same polarized component amplitude and 90-degree phase difference. Therefore, before the circular polarization antenna is applied, it is usually required to test the circular polarization characteristic thereof to ensure that the antenna has better circular polarization performance.

In the prior art, the following methods are generally adopted to test the circularly polarized antenna: the first is to use a rotating linearly polarized antenna for measurement. The implementation of the method needs to use a high-speed rotating source, the cable is easy to shake during rotation, measurement errors of amplitude and phase are caused, and the antenna left-right rotation result cannot be obtained at the same time, and the test efficiency is low. The second is to use standard circularly polarized antennas for measurement. The method needs to adopt a high-index circularly polarized antenna meeting the measurement requirements, the antenna is difficult to manufacture and difficult to realize, and the left-right rotation result of the antenna cannot be obtained simultaneously. The third method is a method for measuring and synthesizing vertical and horizontal components by adopting a single-wire polarized antenna, and the method needs to be measured at least twice and has the defects of measurement drift error, sensitive phase measurement, long test time and the like.

Therefore, the circular polarization antenna testing method in the prior art has the technical problems of low measurement precision and low measurement efficiency.

Disclosure of Invention

The application provides a circularly polarized antenna test system, a calibration and signal test method, which are used for solving the technical problems of low measurement precision and low measurement efficiency of a circularly polarized antenna test method in the prior art.

The present application provides in a first aspect a circularly polarized antenna test system, including:

a circularly polarized antenna test system, comprising:

the dual-linear polarization antenna comprises a first linear polarization antenna and a second linear polarization antenna, wherein the polarization directions of the first linear polarization antenna and the second linear polarization antenna are perpendicular to each other;

the first vector network analysis module is connected with the circularly polarized antenna to be detected and used for outputting a radio frequency signal to the circularly polarized antenna to be detected and analyzing and obtaining a signal state parameter received by the circularly polarized antenna to be detected;

the second vector network analysis module is connected with the first linear polarization antenna and used for outputting radio frequency signals to the first linear polarization antenna and analyzing and obtaining signal state parameters received by the first linear polarization antenna;

and the third vector network analysis module is connected with the second linear polarization antenna and used for outputting radio frequency signals for the second linear polarization antenna and analyzing and obtaining the signal state parameters received by the second linear polarization antenna.

Optionally, the circularly polarized antenna testing system includes:

the vector network analyzer comprises a processor which is arranged in the vector network analyzer and is respectively connected with the first vector network analysis module, the second vector network analysis module and the third vector network analysis module, and meanwhile, the first vector network analysis module, the second vector network analysis module and the third vector network analysis module are also arranged in a shell of the vector network analyzer.

Optionally, the circularly polarized antenna testing system further includes:

the first rotating device is used for bearing the circularly polarized antenna to be tested and can drive the circularly polarized antenna to be tested to rotate around a preset circle center in a preset plane;

the processor is connected with the first rotating device and used for sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be detected to transmit a preset signal after the circularly polarized antenna to be detected is at a zero-degree position where one polarization direction line of the circularly polarized antenna is coincident with a reference line; controlling the second vector network analysis module to analyze and obtain a zero-degree first transmission amplitude-phase parameter of a received signal, which is received by the first linear polarization antenna and corresponds to the preset signal; and controlling the third vector network analysis module to analyze and obtain a zero-degree second transmitted amplitude-phase parameter of a received signal corresponding to the preset signal and received by the second linear polarization antenna; controlling the first rotating device to rotate so that the to-be-detected circularly polarized antenna is located at a 90-degree position where the polarization direction line is 90 degrees relative to the reference line, and then sending an instruction so that the first vector network analysis module continues to control the to-be-detected circularly polarized antenna to transmit a preset signal; controlling the second vector network analysis module to analyze and obtain a 90-degree second transmitted amplitude-phase parameter of a received signal, which is received by the first linear polarization antenna and corresponds to the preset signal; and controlling the third vector network analysis module to analyze and obtain a 90-degree second transmitted amplitude-phase parameter of a received signal corresponding to the preset signal and received by the second linear polarization antenna; and determining the amplitude-phase difference parameters corresponding to two mutually perpendicular polarization links of the circularly polarized antenna to be tested in the transmitting mode based on the zero-degree first transmitting amplitude-phase parameter, the zero-degree second transmitting amplitude-phase parameter, the 90-degree first transmitting amplitude-phase parameter and the 90-degree second transmitting amplitude-phase parameter.

Optionally, the processor is configured to, when the circularly polarized antenna to be measured is located at a zero-degree position where one polarization direction line of the circularly polarized antenna to be measured coincides with respect to a reference line, send an instruction to enable the second vector network analysis module to control the first line polarized antenna to send a predetermined signal within a first time range, send an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be measured to receive the predetermined signal, and analyze and obtain a zero-degree first received amplitude-phase parameter of a received signal corresponding to the predetermined signal; sending an instruction to enable the third vector network analysis module to control the second linear polarization antenna to send the predetermined signal in a second time range, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyzing and obtaining a zero-degree second received amplitude-phase parameter of the received signal corresponding to the predetermined signal; controlling the first rotating device to rotate so that the to-be-tested circularly polarized antenna is located at a 90-degree position where the polarization direction line is 90 degrees relative to the reference line, then sending an instruction so that the second vector network analysis module sends out a predetermined signal through the first linearly polarized antenna in a third time range, sending an instruction so that the first vector network analysis module controls the to-be-tested circularly polarized antenna to receive the predetermined signal, and analyzing and obtaining a 90-degree first received amplitude-phase parameter of a received signal corresponding to the predetermined signal; sending an instruction to enable the third vector network analysis module to send a predetermined signal through the second linear polarization antenna in a fourth time range, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyzing and obtaining a 90-degree second received amplitude-phase parameter of a received signal corresponding to the predetermined signal; determining amplitude-phase difference parameters corresponding to two mutually perpendicular polarization links of the circularly polarized antenna to be tested in a receiving mode based on the zero-degree first received amplitude-phase parameter, the zero-degree second received amplitude-phase parameter, the 90-degree first received amplitude-phase parameter and the 90-degree second received amplitude-phase parameter, wherein the first time range is not coincident with the second time range; the third time range and the fourth time range are not coincident.

Optionally, the processor is configured to send an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to send a first signal; sending an instruction to enable the second vector network analysis module to control the first linear polarization antenna to receive the first signal and analyze and obtain first amplitude-phase data corresponding to the received signal, and sending an instruction to enable the third vector network analysis module to control the second linear polarization antenna to receive the first signal and analyze and obtain second amplitude-phase data corresponding to the received signal; and acquiring a left-handed signal state and a right-handed signal state of the circularly polarized antenna to be detected in the transmitting mode based on the amplitude-phase difference parameters, the first amplitude-phase data and the second amplitude-phase data corresponding to the two mutually perpendicular polarized links of the circularly polarized antenna to be detected in the transmitting mode.

Optionally, the processor is configured to issue an instruction to cause the second vector network analysis module to control the first linearly polarized antenna to be in a state of transmitting a second signal, and at the same time, issue an instruction to cause the third vector network analysis module to control the second linearly polarized antenna to be in a state of transmitting a third signal; and sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be detected to be in a receiving state, and when the phase difference between the second signal and the third signal is 90 degrees, obtaining the left-handed signal state of the circularly polarized antenna to be detected in the receiving mode based on the signal analysis received by the circularly polarized antenna to be detected, or obtaining the right-handed signal state of the circularly polarized antenna to be detected in the receiving mode based on the signal analysis received by the circularly polarized antenna to be detected when the phase difference between the second signal and the third signal is 270 degrees.

Optionally, the circularly polarized antenna testing system further includes:

the second rotating device is used for bearing the dual-linear polarization antenna and can drive the first linear polarization antenna and the second linear polarization antenna to rotate around a preset circle center in a preset plane;

and the processor is connected with the second rotating device and used for controlling the working state of the second rotating device.

A second aspect of the present application provides a circular polarized antenna transmission calibration test method, which is applied to the circular polarized antenna test system according to the first aspect, and includes:

after the circularly polarized antenna to be tested is positioned at a zero-degree position where one polarization direction line of the circularly polarized antenna to be tested is coincident with the reference line, sending a preset signal through the circularly polarized antenna to be tested;

receiving the preset signal through the first linear polarization antenna, and analyzing and obtaining a zero-degree first transmission amplitude-phase parameter of a received signal corresponding to the preset signal by the second vector network analysis module; receiving the preset signal through the second linear polarization antenna, and analyzing and obtaining a zero-degree second transmitted amplitude-phase parameter of the received signal corresponding to the preset signal by the third vector network analysis module;

adjusting the position of the circularly polarized antenna to be detected so that the circularly polarized antenna to be detected continues to send the preset signal through the circularly polarized antenna to be detected after the circularly polarized antenna to be detected is located at a 90-degree position where the polarization direction line is 90 degrees relative to the reference line;

receiving the preset signal through the first linear polarization antenna, and analyzing and obtaining a 90-degree first transmission amplitude-phase parameter of a received signal corresponding to the preset signal by the second vector network analysis module; receiving the preset signal through the second linear polarization antenna, and analyzing by the third vector network analysis module to obtain a 90-degree second transmitted amplitude-phase parameter of the received signal corresponding to the preset signal;

and determining the amplitude-phase difference parameters corresponding to two mutually perpendicular polarization links of the circularly polarized antenna to be tested in the transmitting mode based on the zero-degree first transmitting amplitude-phase parameter, the zero-degree second transmitting amplitude-phase parameter, the 90-degree first transmitting amplitude-phase parameter and the 90-degree second transmitting amplitude-phase parameter.

A third aspect of the present application provides a circular polarized antenna receiving calibration test method, which is applied to the circular polarized antenna test system according to the first aspect, and includes:

after the circularly polarized antenna to be tested is positioned at a zero-degree position where one polarization direction line of the circularly polarized antenna to be tested is coincident with a reference line, a preset signal is sent out through the first linearly polarized antenna within a first time range, the preset signal is received through the circularly polarized antenna to be tested, and a first receiving amplitude-phase parameter of zero degree of the received signal corresponding to the preset signal is obtained through analysis of the first vector network analysis module; the predetermined signal is sent out through the second linear polarization antenna in a second time range, the predetermined signal is received through the circularly polarized antenna to be tested, and a zero-degree second received amplitude-phase parameter of the received signal corresponding to the predetermined signal is obtained through analysis of the first vector network analysis module; wherein the first time range and the second time range are not coincident;

adjusting the position of the circularly polarized antenna to be detected, so that after the polarization direction line is at a 90-degree position of 90 degrees relative to the reference line, a preset signal is sent out through the first linearly polarized antenna in a third time range, the preset signal is received through the circularly polarized antenna to be detected, and a first 90-degree received amplitude-phase parameter of a received signal corresponding to the preset signal is obtained through analysis of the first vector network analysis module; sending the predetermined signal through the second linear polarization antenna in a fourth time range, receiving the predetermined signal through the to-be-tested circularly polarized antenna, and analyzing by the first vector network analysis module to obtain a 90-degree second received amplitude-phase parameter of the received signal corresponding to the predetermined signal; wherein the third time range and the fourth time range are not coincident;

and determining corresponding amplitude-phase difference parameters of the to-be-detected circularly polarized antenna on the two vertical polarized links in the receiving mode based on the zero-degree first received amplitude-phase parameter, the zero-degree second received amplitude-phase parameter, the 90-degree first received amplitude-phase parameter and the 90-degree second received amplitude-phase parameter.

A fourth aspect of the present application provides a method for testing a transmission signal of a circular polarized antenna, applied to the circular polarized antenna testing system according to the first aspect, including:

controlling the circularly polarized antenna to be tested to send a first signal through a first vector network analysis module;

receiving the first signal through the first linear polarization antenna, and analyzing by the second vector network analysis module to obtain first amplitude-phase data corresponding to the received signal; receiving the first signal through the second linear polarization antenna, and analyzing by the third vector network analysis module to obtain second amplitude and phase data corresponding to the received signal;

and acquiring a left-handed signal state and a right-handed signal state of the circularly polarized antenna to be detected in the transmitting mode based on the amplitude-phase difference parameters, the first amplitude-phase data and the second amplitude-phase data corresponding to the two mutually perpendicular polarized links of the circularly polarized antenna to be detected in the transmitting mode.

A fifth aspect of the present application provides a method for testing a received signal of a circularly polarized antenna, applied to the system for testing a circularly polarized antenna according to the first aspect, including:

controlling the first linear polarization antenna to be in a state of transmitting a second signal through a second vector network analysis module, and controlling the second linear polarization antenna to be in a state of transmitting a third signal through a third vector network analysis module; wherein the second signal and the third signal are 90 ° or 270 ° out of phase;

the first vector network analysis module controls the circularly polarized antenna to be detected to be in a receiving state, and when the phase difference between the second signal and the third signal is 90 degrees, the left-handed signal state of the circularly polarized antenna to be detected in the receiving mode is obtained based on the signal analysis received by the circularly polarized antenna to be detected, or when the phase difference between the second signal and the third signal is 270 degrees, the right-handed signal state of the circularly polarized antenna to be detected in the receiving mode is obtained based on the signal analysis received by the circularly polarized antenna to be detected.

A sixth aspect of the application provides a computer arrangement comprising processing means for implementing the steps of the method according to the second, third, fourth or fifth aspect when executing a computer program stored in a memory.

A seventh aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the method according to the second, third, fourth, and fifth aspects.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

the circularly polarized antenna test system in the embodiment of the application is provided with a double-linear polarized antenna comprising a first linear polarized antenna and a second linear polarized antenna with mutually perpendicular polarization directions, a first vector network analysis module connected with the circularly polarized antenna to be tested, a second vector network analysis module connected with the first linear polarized antenna, and a third vector network analysis module connected with the second linear polarized antenna, wherein each vector network analysis module is used for carrying out different control and analysis operations on the circularly polarized antenna to be tested and the dual polarized antenna in the test process, so that the calibration test of the test system can be quickly realized, further, the signal test under the transceiving state can be quickly carried out on the circularly polarized antenna on the basis of system calibration data, and the test results on links in different polarization directions can be obtained by adopting a mode of simultaneous measurement and comprehensive analysis in the signal test process, the method and the device have the function of providing accurate evaluation basis for the radiation performance evaluation of the circularly polarized antenna. Compared with the conventional circular polarization antenna test method, the test method has the advantages of higher test speed and higher test precision.

Drawings

Fig. 1 is a structural diagram of a circular polarization antenna testing system according to an embodiment of the present invention;

fig. 2 is a flowchart of a circular polarized antenna transmission calibration test method according to an embodiment of the present invention;

fig. 3 is a flowchart of a circular polarized antenna receiving calibration test method according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for testing a transmission signal of a circularly polarized antenna according to an embodiment of the present invention;

fig. 5 is a flowchart of a method for testing a receiving signal of a circularly polarized antenna according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a processing result of a method for testing a transmission signal of a circularly polarized antenna according to an embodiment of the present invention;

fig. 7 is a schematic processing result diagram of a circular polarization antenna receiving signal testing method according to an embodiment of the present invention.

Detailed Description

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

The technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Example one

Referring to fig. 1 to 5, an embodiment of a circular polarized antenna testing system includes:

a dual-polarized antenna comprising a first linearly polarized antenna 1011 and a second linearly polarized antenna 1012, the polarization directions of the first linearly polarized antenna 1011 and the second linearly polarized antenna 1012 being perpendicular to each other;

the first vector network analysis module 102 is connected to the circularly polarized antenna to be detected, and is configured to output a radio frequency signal to the circularly polarized antenna to be detected, and analyze and obtain a signal state parameter received by the circularly polarized antenna to be detected;

the second vector network analysis module 103 is connected to the first linear polarization antenna 1011, and is configured to output a radio frequency signal to the first linear polarization antenna 1011, and analyze and obtain a signal state parameter received by the first linear polarization antenna 1011;

the third vector network analysis module 104 is connected to the second linear polarization antenna 1012, and is configured to output a radio frequency signal to the second linear polarization antenna 1012, and analyze and obtain a signal state parameter received by the second linear polarization antenna 1012.

Further, the first vector network analysis module, the second vector network analysis module, and the third vector network analysis module in the embodiment of the present application may be integrated into a vector network analyzer, and respectively connected to the processor 105 disposed in the casing of the vector network analyzer. Therefore, the circularly polarized antenna test system can be further simplified, and the technical effect of reducing the structural complexity of the system is achieved.

Further, in order to improve the control efficiency of the test system, the circular polarization antenna test system further includes:

the circularly polarized antenna test system further comprises:

the first rotating device is used for bearing the circularly polarized antenna to be tested so that the circularly polarized antenna to be tested can rotate around a preset circle center in a preset plane.

The processor 105 may be connected to the first rotating device, and may rotate the circular polarization antenna to be tested in a predetermined plane, so as to achieve the purpose of automatically controlling two mutually perpendicular linear polarization directions of the circular polarization antenna to be tested.

Circular polarization antenna test system in embodiment of the applicationIn thatRelating to circular-polarisation characteristics to a circularly-polarised antenna to be measuredSignalTestingFront side，The circularly polarized antenna test system can be calibrated and tested to respectively obtain circularly polarized antennas And the test system calibrates data aiming at each link of the circularly polarized antenna to be tested in a signal transceiving mode.

Firstly, the methodIn aTo pairCircularly polarized antennaThe test system is for the circularly polarized antenna to be testedThe processor is used for performing calibration test on the transmission linkAfter the circularly polarized antenna to be tested is positioned at a zero-degree position where one polarization direction line of the circularly polarized antenna to be tested is coincident with a reference line, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to transmit a preset signal; controlling the second vector network analysis module to analyze and obtain a zero-degree first transmission amplitude-phase parameter of a received signal, which is received by the first linear polarization antenna and corresponds to the preset signal; and controlling the third vector network analysis module to analyze and obtain a zero-degree second transmitted amplitude-phase parameter of a received signal corresponding to the preset signal and received by the second linear polarization antenna; controlling the first rotating device to rotate so that the to-be-detected circularly polarized antenna is located at a 90-degree position where the polarization direction line is 90 degrees relative to the reference line, and then sending an instruction so that the first vector network analysis module continues to control the to-be-detected circularly polarized antenna to transmit a preset signal; controlling the second vector network analysis module to analyze and obtain a 90-degree second transmitted amplitude-phase parameter of a received signal, which is received by the first linear polarization antenna and corresponds to the preset signal; and controlling the third vector network analysis module to analyze and obtain a 90-degree second transmitted amplitude-phase parameter of a received signal corresponding to the preset signal and received by the second linear polarization antenna; based on the zero-degree first transmitting amplitude phase parameter, the zero-degree second transmitting amplitude phase parameter, the 90-degree first transmitting amplitude phase parameter, and the 90-degree second transmitting amplitude phase parameter, determining an amplitude-phase difference parameter corresponding to two mutually perpendicular polarized links of the test system in the transmitting mode for the circularly polarized antenna to be tested.

The following examples illustrate:

example 1, before a calibration test of a transmission link is performed by using the circular polarization antenna test system according to the embodiment of the present application, connection relationships among the devices may be as shown in fig. 1, the first vector network analysis module, the second vector network analysis module, and the third vector network analysis module may be disposed in a vector network analyzer (hereinafter, referred to as a vector network), and an antenna to be tested is located at a zero-degree position. Before testing, the phase control function of the vector network is set, so that the second vector network analysis module and the third vector network analysis moduleThe Phase enable is turned on and the Phase values are all set to 0, i.e. Phase2 is 0 and Phase3 is 0, and parameters such as test frequency, output power, scanning mode and the like are set, and the setting mode can be set as preparation before the test. In this example, the test frequency is F0, and the output powers of three ports (i.e., the connection port of the first vector network analysis module and the circular polarization antenna to be tested, the connection port of the second vector network analysis module and the first linear polarization antenna, and the connection port of the third vector network analysis module and the second linear polarization antenna) are respectively: the Power1 ═ 0, Power2 ═ 0 and Power3 ═ 0, and the scanning mode can be set as alternating scanning or point-by-point scanning. After the test is started, a preset signal is transmitted through the circularly polarized antenna to be tested, so that the amplitude phase positions corresponding to the feedback signal of the first linear polarized antenna and the feedback signal of the second linear polarized antenna can be tested

Namely, the amplitude phase of the horizontal polarization direction (represented by the letter H in the formula) and the amplitude phase of the vertical polarization direction (represented by the letter V in the formula) of the circularly polarized antenna to be measured at the zero-degree position are respectively obtained. Then, the circularly polarized antenna to be measured is rotated by 90 degrees clockwise relative to the zero-degree position (that is, the circularly polarized antenna to be measured is adjusted to the 90-degree position), and the amplitude phase positions corresponding to the feedback signal of the first linearly polarized antenna and the feedback signal of the second linearly polarized antenna are measured again respectively

Namely, the amplitude phases of the horizontal polarization direction and the vertical polarization direction of the circularly polarized antenna to be measured at 90-degree position are respectively obtained. The amplitude phase difference of the horizontal link and the vertical link of the test system for the circularly polarized antenna to be tested in the transmitting mode (represented by the letter T, t in the formula) is as follows:

(ΔAmp_T，ΔPhase_T)＝(A_t00+A_t01-A_t10-A_t11，P_t00+P_t01-P_t10-P_t11+ 180)/2; where Amp is the amplitude value and Phase is the Phase value.

Therefore, in the system emission calibration test of the technical scheme of the application, the horizontal polarization and the vertical polarization can be measured simultaneously.

It should be noted that the zero-degree position is a zero-degree position where one polarization direction line of the circularly polarized antenna to be measured is coincident with respect to the reference line. The polarization direction line may specifically be a straight line where a linearly polarized wave excited by the circularly polarized antenna to be measured is located, and the reference line may be set according to needs. The 90-degree position may refer to that the polarization direction line of the circularly polarized antenna to be measured is 90 degrees with respect to the reference line on the plane where the two vertically polarized waves excited by the circularly polarized antenna to be measured are located. The "horizontal polarization" and the "vertical polarization" may respectively refer to directions in which two mutually perpendicular linear polarized waves excited by the circularly polarized antenna to be measured are located.

On the other hand, in the calibration test of the receiving link of the circularly polarized antenna test system for the circularly polarized antenna to be tested In the process of the preparation, the raw materials are mixed,the processor is used for sending an instruction to enable the second vector network analysis module to control the first linear polarization antenna to send a preset signal in a first time range when the circularly polarized antenna to be tested is in a zero-degree position where one polarization direction line of the circularly polarized antenna to be tested is coincident with a reference line, and sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the preset signal and analyze and obtain a zero-degree first receiving amplitude-phase parameter of a receiving signal corresponding to the preset signal; sending an instruction to enable the third vector network analysis module to control the second linear polarization antenna to send the predetermined signal in a second time range, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyzing and obtaining a zero-degree second received amplitude-phase parameter of the received signal corresponding to the predetermined signal; controlling the first rotating device to rotate so that the circularly polarized antenna to be tested is positioned at a 90-degree position where the polarization direction line is 90 degrees relative to the reference line, and then sending an instruction so that the second vector network analysis module can be used in a third time rangeSending a predetermined signal through the first linear polarization antenna, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyzing to obtain a 90-degree first received amplitude-phase parameter of a received signal corresponding to the predetermined signal; sending an instruction to enable the third vector network analysis module to send a predetermined signal through the second linear polarization antenna in a fourth time range, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyzing and obtaining a 90-degree second received amplitude-phase parameter of a received signal corresponding to the predetermined signal; determining the zero-degree first received amplitude-phase parameter, the zero-degree second received amplitude-phase parameter, the 90-degree first received amplitude-phase parameter and the 90-degree second received amplitude-phase parameterThe test system of the application is directed toThe antenna to be tested is used for receiving the amplitude-phase difference parameters corresponding to two mutually perpendicular polarized links in a receiving mode, wherein the first time range is not overlapped with the second time range; the third time range and the fourth time range are not coincident.

The following examples illustrate:

example 2, the circularly polarized antenna to be tested is adjusted to be at the zero degree position, similarly as the pre-test setup in example 1. After the test is started, the same predetermined signals can be transmitted through the first linear polarization antenna and the second linear polarization antenna in sequence, and the circularly polarized antenna to be tested is set to be in a signal receiving mode. Therefore, the amplitude phase corresponding to the signal fed back by the circularly polarized antenna to be tested can be sequentially measured, namely, the amplitude phase of the horizontal polarization and the amplitude phase of the vertical polarization of the circularly polarized antenna to be tested are sequentially measured

Then, the circularly polarized antenna to be measured is adjusted to the 90-degree position, and the amplitude phases in the horizontal polarization direction and the vertical polarization direction are sequentially measured again

The application test systemThe amplitude phase difference of the horizontal link and the vertical link in the receiving mode (represented by the letter R, r in the formula) for the circularly polarized antenna to be tested is as follows:

(ΔAmp_R，ΔPhase_R)＝(A_r00+A_r01-A_r10-A_r11，P_r00+P_r01-P_r10-P_r11+180)/2。

after system calibration data of the test system for the circularly polarized antenna to be tested is obtained，Can be treated And testing the signal transceiving performance of the circularly polarized antenna.

First of all, the first step is to,in the process of testing the signal of the circularly polarized antenna to be tested in the transmitting mode, the processor is used for sending an instruction so that the first vector network analysis module controls the circularly polarized antenna to be tested to send a first signal; sending an instruction to enable the second vector network analysis module to control the first linear polarization antenna to receive the first signal and analyze and obtain first amplitude-phase data corresponding to the received signal, and sending an instruction to enable the third vector network analysis module to control the second linear polarization antenna to receive the first signal and analyze and obtain second amplitude-phase data corresponding to the received signal; and acquiring a left-handed signal state and a right-handed signal state of the circularly polarized antenna to be detected in the transmitting mode based on the amplitude-phase difference parameters, the first amplitude-phase data and the second amplitude-phase data corresponding to the two mutually perpendicular polarized links of the circularly polarized antenna to be detected in the transmitting mode.

The following examples illustrate:

example 3: when the transmitted signal is measured, the circularly polarized antenna to be measured can be adjusted to be in a signal transmitting state, and the dual-linear polarized antenna is in a signal receiving state. And outputting a first signal to be transmitted to the circularly polarized antenna to be detected by the first vector network analysis module. Then, the signals received by the first linear polarization antenna and the second linear polarization antenna are measured by the second vector network analysis module and the third vector network analysis module respectively to obtain the signals received by the first linear polarization antennaFirst amplitude and phase data (Amp 2)_T，Phase2_T) And second amplitude and phase data (Amp 3) of a signal received by the second linearly polarized antenna_T，Phase3_T). Combining the measured amplitude-phase data of the two signals with the measured amplitude-phase difference data of the horizontal link and the vertical link of the circularly polarized antenna to be measured in the transmitting mode, and obtaining a transmitting left-handed signal F of the circularly polarized antenna to be measured in the transmitting state_LAnd transmitting a right-hand signal F_R. The specific calculation formula may be as follows:

wherein,

P_H＝Phase2_T，

P_V＝Phase3_T+ΔPhase_T. Taking the emission pattern as an example, the processing result of the above process may be as shown in fig. 6.

In the process of testing the signal of the circularly polarized antenna to be tested in the receiving mode, the processor is used for sending an instruction to enable the second vector network analysis module to control the first linearly polarized antenna to be in the state of transmitting the second signal, and simultaneously sending an instruction to enable the third vector network analysis module to control the second linearly polarized antenna to be in the state of transmitting the third signal; and sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be detected to be in a receiving state, and when the phase difference between the second signal and the third signal is 90 degrees, obtaining the left-handed signal state of the circularly polarized antenna to be detected in the receiving mode based on the signal analysis received by the circularly polarized antenna to be detected, or obtaining the right-handed signal state of the circularly polarized antenna to be detected in the receiving mode based on the signal analysis received by the circularly polarized antenna to be detected when the phase difference between the second signal and the third signal is 270 degrees.

The following examples illustrate:

example 4: the output Power of the second vector network analysis module and the third vector network analysis module may be set to Power2 ═ P2 and Power3 ═ P3, respectively, so that- Δ Amp_RSetting the Phase of the third signal transmitted by the second linear polarization antenna to be P2-P3 as delta Phase3_R(that is, the Phase difference parameter of the circularly polarized antenna to be measured in the receiving mode obtained in example 2), when the Phase of the second signal transmitted by the first linearly polarized antenna is set to Phase3 ═ 360 ° × M +90 °, where M is an integer, the left-handed signal of the circularly polarized antenna to be measured in the receiving mode can be measured by the first vector network analysis module; or, when the Phase of the second signal transmitted by the first linear polarization antenna is set to Phase2 ═ 360 ° × N +270 °, and N is an integer, the first vector network analysis module may measure the right-handed signal of the circularly polarized antenna to be measured in the receiving mode. And respectively carrying out two-point phase scanning in the test process. Taking the reception pattern as an example, the processing result of the above process can be shown in fig. 7.

Further, the circular polarization antenna test system according to the embodiment of the present application may further include:

Through the device and the arrangement, the system processor can adjust the linear polarization orientation of the first linear polarization antenna and the second linear polarization antenna by adjusting the rotation direction and the rotation displacement of the second rotating device. The two linear polarization directions of the dual-linear polarization antenna are adjusted in the test process or the polarization direction of the circularly polarized antenna is adjusted to meet the requirement in the test process under the working state that the first rotating device is not activated or is matched with the first rotating device.

It should be noted that, in particular, the processor 105 may be a general-purpose Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits for controlling program execution.

Further, the processor 105 may further include a memory, and the number of the memory may be one or more. The Memory may include a Read Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory.

Therefore, in the circular polarization antenna test system in the embodiment of the application, by arranging the dual-linear polarization antenna comprising the first linear polarization antenna and the second linear polarization antenna with mutually perpendicular polarization directions, the first vector network analysis module connected with the circular polarization antenna to be tested, the second vector network analysis module connected with the first linear polarization antenna, and the third vector network analysis module connected with the second linear polarization antenna, different control and analysis operations are performed on the circular polarization antenna to be tested and the dual-polarization antenna in the test process through each vector network analysis module, not only can the calibration test of the test system be rapidly realized, but also the signal test under the transceiving state can be rapidly performed on the circular polarization antenna on the basis of the system calibration data, and the test results on links in different polarization directions can be obtained by adopting the modes of simultaneous measurement and comprehensive analysis in the signal test process, the method and the device have the function of providing accurate evaluation basis for the radiation performance evaluation of the circularly polarized antenna. Compared with the conventional circular polarization antenna test method, the test method has the advantages of higher test speed and higher test precision.

Example two

Referring to fig. 2, a second embodiment of the present application provides a circular polarized antenna transmission calibration test method applied to the circular polarized antenna test system according to the first embodiment, including:

step 201: after the circularly polarized antenna to be tested is positioned at a zero-degree position where one polarization direction line of the circularly polarized antenna to be tested is coincident with the reference line, sending a preset signal through the circularly polarized antenna to be tested;

step 202: receiving the preset signal through the first linear polarization antenna, and analyzing and obtaining a zero-degree first transmission amplitude-phase parameter of a received signal corresponding to the preset signal by the second vector network analysis module; receiving the preset signal through the second linear polarization antenna, and analyzing and obtaining a zero-degree second transmitted amplitude-phase parameter of the received signal corresponding to the preset signal by the third vector network analysis module;

step 203: adjusting the position of the circularly polarized antenna to be detected so that the circularly polarized antenna to be detected continues to send the preset signal through the circularly polarized antenna to be detected after the circularly polarized antenna to be detected is located at a 90-degree position where the polarization direction line is 90 degrees relative to the reference line;

step 204: receiving the preset signal through the first linear polarization antenna, and analyzing and obtaining a 90-degree first transmission amplitude-phase parameter of a received signal corresponding to the preset signal by the second vector network analysis module; receiving the preset signal through the second linear polarization antenna, and analyzing by the third vector network analysis module to obtain a 90-degree second transmitted amplitude-phase parameter of the received signal corresponding to the preset signal;

step 205: and determining the amplitude-phase difference parameters corresponding to two mutually perpendicular polarization links of the circularly polarized antenna to be tested in the transmitting mode based on the zero-degree first transmitting amplitude-phase parameter, the zero-degree second transmitting amplitude-phase parameter, the 90-degree first transmitting amplitude-phase parameter and the 90-degree second transmitting amplitude-phase parameter.

Various modifications and embodiments of the circular polarized antenna test system in the embodiment of fig. 1 are also applicable to the circular polarized antenna transmission calibration test method in the embodiment, and those skilled in the art can clearly understand the implementation method of the circular polarized antenna transmission calibration test method in the embodiment through the foregoing detailed description of the circular polarized antenna test system, so that the detailed description is omitted here for the sake of brevity.

EXAMPLE III

Referring to fig. 3, a third embodiment of the present application provides a circular polarized antenna receiving calibration test method applied to the circular polarized antenna test system according to the first embodiment, including:

step 301: after the circularly polarized antenna to be tested is positioned at a zero-degree position where one polarization direction line of the circularly polarized antenna to be tested is coincident with a reference line, a preset signal is sent out through the first linearly polarized antenna within a first time range, the preset signal is received through the circularly polarized antenna to be tested, and a first receiving amplitude-phase parameter of zero degree of the received signal corresponding to the preset signal is obtained through analysis of the first vector network analysis module; the predetermined signal is sent out through the second linear polarization antenna in a second time range, the predetermined signal is received through the circularly polarized antenna to be tested, and a zero-degree second received amplitude-phase parameter of the received signal corresponding to the predetermined signal is obtained through analysis of the first vector network analysis module; wherein the first time range and the second time range are not coincident;

step 302: adjusting the position of the circularly polarized antenna to be detected, so that after the polarization direction line is at a 90-degree position of 90 degrees relative to the reference line, a preset signal is sent out through the first linearly polarized antenna in a third time range, the preset signal is received through the circularly polarized antenna to be detected, and a first 90-degree received amplitude-phase parameter of a received signal corresponding to the preset signal is obtained through analysis of the first vector network analysis module; sending the predetermined signal through the second linear polarization antenna in a fourth time range, receiving the predetermined signal through the to-be-tested circularly polarized antenna, and analyzing by the first vector network analysis module to obtain a 90-degree second received amplitude-phase parameter of the received signal corresponding to the predetermined signal; wherein the third time range and the fourth time range are not coincident;

step 303: and determining corresponding amplitude-phase difference parameters of the to-be-detected circularly polarized antenna on the two vertical polarized links in the receiving mode based on the zero-degree first received amplitude-phase parameter, the zero-degree second received amplitude-phase parameter, the 90-degree first received amplitude-phase parameter and the 90-degree second received amplitude-phase parameter.

Example four

Referring to fig. 4, a method for testing a transmission signal of a circular polarized antenna according to a fourth embodiment of the present application is applied to a system for testing a circular polarized antenna according to the first embodiment, and includes:

step 401: controlling the circularly polarized antenna to be tested to send a first signal through a first vector network analysis module;

step 402: receiving the first signal through the first linear polarization antenna, and analyzing by the second vector network analysis module to obtain first amplitude-phase data corresponding to the received signal; receiving the first signal through the second linear polarization antenna, and analyzing by the third vector network analysis module to obtain second amplitude and phase data corresponding to the received signal;

step 403: and acquiring a left-handed signal state and a right-handed signal state of the circularly polarized antenna to be detected in the transmitting mode based on the amplitude-phase difference parameters, the first amplitude-phase data and the second amplitude-phase data corresponding to the two mutually perpendicular polarized links of the circularly polarized antenna to be detected in the transmitting mode.

EXAMPLE five

Referring to fig. 5, a fifth embodiment of the present application provides a method for testing a receiving signal of a circular polarized antenna, applied to a circular polarized antenna testing system according to the first embodiment, including:

step 501: controlling the first linear polarization antenna to be in a state of transmitting a second signal through a second vector network analysis module, and controlling the second linear polarization antenna to be in a state of transmitting a third signal through a third vector network analysis module; wherein the second signal and the third signal are 90 ° or 270 ° out of phase;

step 502: the first vector network analysis module controls the circularly polarized antenna to be detected to be in a receiving state, and when the phase difference between the second signal and the third signal is 90 degrees, the left-handed signal state of the circularly polarized antenna to be detected in the receiving mode is obtained based on the signal analysis received by the circularly polarized antenna to be detected, or when the phase difference between the second signal and the third signal is 270 degrees, the right-handed signal state of the circularly polarized antenna to be detected in the receiving mode is obtained based on the signal analysis received by the circularly polarized antenna to be detected.

An embodiment of the present application further provides a computer apparatus, where the apparatus includes a processing device, and the processing device is configured to implement the steps of the method according to embodiments two to five when executing the computer program stored in the memory.

The embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the steps of the method according to embodiments two to five.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Further, the steps of the methods in the technical solutions of the present application may be reversed, and the sequence may be changed while still falling within the scope of the invention covered by the present application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A circularly polarized antenna test system, comprising:

the third vector network analysis module is connected with the second linear polarization antenna and used for outputting radio frequency signals for the second linear polarization antenna and analyzing and obtaining signal state parameters received by the second linear polarization antenna;

2. The system of claim 1, wherein the circularly polarized antenna test system comprises:

3. The test system of claim 2, wherein the processor is configured to issue an instruction to cause the second vector network analysis module to control the first linearly polarized antenna to issue a predetermined signal within a first time range when the circularly polarized antenna to be tested is at a zero degree position where one polarization direction line of the circularly polarized antenna to be tested is coincident with a reference line, issue an instruction to cause the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyze and obtain a zero degree first received amplitude-phase parameter of a received signal corresponding to the predetermined signal; sending an instruction to enable the third vector network analysis module to control the second linear polarization antenna to send the predetermined signal in a second time range, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyzing and obtaining a zero-degree second received amplitude-phase parameter of the received signal corresponding to the predetermined signal; controlling the first rotating device to rotate so that the to-be-tested circularly polarized antenna is located at a 90-degree position where the polarization direction line is 90 degrees relative to the reference line, then sending an instruction so that the second vector network analysis module sends out a predetermined signal through the first linearly polarized antenna in a third time range, sending an instruction so that the first vector network analysis module controls the to-be-tested circularly polarized antenna to receive the predetermined signal, and analyzing and obtaining a 90-degree first received amplitude-phase parameter of a received signal corresponding to the predetermined signal; sending an instruction to enable the third vector network analysis module to send a predetermined signal through the second linear polarization antenna in a fourth time range, sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be tested to receive the predetermined signal, and analyzing and obtaining a 90-degree second received amplitude-phase parameter of a received signal corresponding to the predetermined signal; determining amplitude-phase difference parameters corresponding to two mutually perpendicular polarization links of the circularly polarized antenna to be tested in a receiving mode based on the zero-degree first received amplitude-phase parameter, the zero-degree second received amplitude-phase parameter, the 90-degree first received amplitude-phase parameter and the 90-degree second received amplitude-phase parameter, wherein the first time range is not coincident with the second time range; the third time range and the fourth time range are not coincident.

4. The test system of claim 3, wherein the processor is configured to issue an instruction to cause the first vector network analysis module to control the circularly polarized antenna under test to issue a first signal; sending an instruction to enable the second vector network analysis module to control the first linear polarization antenna to receive the first signal and analyze and obtain first amplitude-phase data corresponding to the received signal, and sending an instruction to enable the third vector network analysis module to control the second linear polarization antenna to receive the first signal and analyze and obtain second amplitude-phase data corresponding to the received signal; and acquiring a left-handed signal state and a right-handed signal state of the circularly polarized antenna to be detected in the transmitting mode based on the amplitude-phase difference parameters, the first amplitude-phase data and the second amplitude-phase data corresponding to the two mutually perpendicular polarized links of the circularly polarized antenna to be detected in the transmitting mode.

5. The test system of claim 4, wherein the processor is configured to issue instructions to cause the second vector network analysis module to control the first linearly polarized antenna to be in a state to transmit a second signal, and to issue instructions to cause the third vector network analysis module to control the second linearly polarized antenna to be in a state to transmit a third signal; and sending an instruction to enable the first vector network analysis module to control the circularly polarized antenna to be detected to be in a receiving state, and when the phase difference between the second signal and the third signal is 90 degrees, obtaining the left-handed signal state of the circularly polarized antenna to be detected in the receiving mode based on the signal analysis received by the circularly polarized antenna to be detected, or obtaining the right-handed signal state of the circularly polarized antenna to be detected in the receiving mode based on the signal analysis received by the circularly polarized antenna to be detected when the phase difference between the second signal and the third signal is 270 degrees.

6. The test system of claim 1, wherein the circularly polarized antenna test system further comprises:

7. A circular polarized antenna transmission calibration test method applied to the circular polarized antenna test system according to any one of claims 1 to 6, comprising:

8. A circularly polarized antenna reception calibration test method applied to the circularly polarized antenna test system according to any one of claims 1 to 6, comprising:

9. A method for testing a circularly polarized antenna transmission signal, applied to a circularly polarized antenna testing system according to any one of claims 1 to 6, comprising:

10. A method for testing a reception signal of a circularly polarized antenna, applied to a circularly polarized antenna testing system according to any one of claims 1 to 6, comprising:

11. A computer arrangement, characterized in that the arrangement comprises processing means for implementing the steps of the method according to any of claims 7-10 when executing a computer program stored in a memory.

12. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 7-10.