Microwave anechoic chamber test system based on phased array radar antenna

Abstract

The embodiment of the invention provides an anechoic chamber testing system based on a phased array radar antenna, and relates to the field of phased array radar antenna testing, and the system comprises a receiving and sending large box product end, a receiving and sending large box beacon end, a change-over switch box, a beacon horn antenna, and a phased array radar antenna. The receiving and transmitting large box product end is connected with a receiving interface and a transmitting interface of the phased array radar antenna. The receiving and sending large box beacon end is connected with the beacon horn antenna, and the beacon horn antenna is aligned with the phased array radar antenna; a receiving channel and a transmitting channel are arranged in the change-over switch box, and the change-over switch box is connected with the receiving and transmitting large box product end and the receiving and transmitting large box beacon end and used for switching the signal direction from the phased array radar antenna to the beacon horn. Compared with an existing test system, the test system has the advantages that the accuracy of test data is improved, the test preparation time and accessory preparation cost are reduced, and the test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phased array radar antenna testing, in particular to a microwave anechoic chamber test system based on a phased array radar antenna. BACKGROUND

[0002] In the production process of the phased array radar antenna, in order to accurately test the technical index, a microwave anechoic chamber needs to be built, so that the phased array radar antenna can avoid the interference of reflected electromagnetic waves and other electromagnetic waves during the testing process.

[0003] Usually, the phased array radar antenna and the beacon horn antenna are respectively arranged at two ends of the anechoic chamber; cables or waveguides are used to transmit the receiving signals and the transmitting signals of the phased array radar antenna, and instruments are used to analyze and measure the receiving signals and the transmitting signals.

[0004] Currently, when testing the receiving signal index and the transmitting signal index of the phased array radar antenna in the microwave anechoic chamber, due to the customized requirements of the phased array radar antenna, there are various interface definitions and interface forms, and when testing the signal index, the interface cables need to be replaced to connect different interfaces, and the interfaces connected to the instruments also need to be replaced; different phased array radar antennas have different input signal requirements, and the output signal index is also different, and test accessories need to be added for adjustment during the testing process; due to the replacement of the cables and the replacement of the test accessories, errors are generated in the calibration test system during the testing process of the phased array radar antenna, which affects the testing efficiency and the accuracy of the testing index. SUMMARY

[0005] Embodiments of the present application provide a microwave anechoic chamber test system based on a phased array radar antenna to automatically adjust the amplitude of the test signal and improve the testing efficiency and accuracy of the phased array radar antenna index.

[0006] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0007] According to a first aspect of the embodiments of the present application, a microwave anechoic chamber test system based on a phased array radar antenna is provided, comprising: a transceiving amplifier box product end, a transceiving amplifier box beacon end, a switching switch box, a beacon horn antenna, and a phased array radar antenna; The transceiving amplifier box product end is internally provided with a receiving channel and a transmitting channel, and the transceiving amplifier box product end is connected with the receiving interface and the transmitting interface of the phased array radar antenna to realize the transmission of the radio frequency signals; The transceiving amplifier box beacon end is internally provided with a receiving channel and a transmitting channel, and the transceiving amplifier box beacon end is connected with the beacon horn antenna, and the beacon horn antenna is arranged in alignment with the phased array radar antenna; The switching switch box is internally provided with a receiving channel and a transmitting channel, and is connected with the product end of the transceiving amplifier box and the beacon end of the transceiving amplifier box respectively, and is used for switching the signal direction of the phased array radar antenna to the beacon horn.

[0008] In some embodiments of the present application, based on the foregoing scheme, the system further comprises an instrument device for signal analysis and measurement, which is connected with the switching switch box.

[0009] In some embodiments of the present application, based on the foregoing scheme, the instrument device can be a vector network analyzer, a signal source, a spectrum analyzer, a transmitter or a receiver.

[0010] In some embodiments of the present application, based on the foregoing scheme, the product end of the transceiving amplifier box is provided with a plurality of interfaces and an interface switching module for switching the connection state of the plurality of interfaces.

[0011] In some embodiments of the present application, based on the foregoing scheme, the product end of the transceiving amplifier box is provided with a self-checking module for detecting the working state and signal monitoring of the product end of the transceiving amplifier box.

[0012] In some embodiments of the present application, based on the foregoing scheme, the receiving channel and the transmitting channel internally provided in the product end of the transceiving amplifier box are provided with control switches.

[0013] In some embodiments of the present application, based on the foregoing scheme, the switching switch box is provided with a self-checking module for detecting the working state and signal monitoring of the switching switch box.

[0014] In some embodiments of the present application, based on the foregoing scheme, the receiving channel and the transmitting channel internally provided in the switching switch box are provided with control switches for controlling the destination of the received signal and the transmitted signal.

[0015] In some embodiments of the present application, based on the foregoing scheme, the beacon horn antenna can be a aperture antenna, a slot antenna, a dipole antenna, an end-fire antenna or a surface-mounted antenna.

[0016] The technical scheme of the present application has the following beneficial effects: 1. The test system can complete the automatic test of the phased array radar antenna in the microwave anechoic chamber through one-time installation, without the need to replace cables and test accessories in the middle, reduces the test error, and improves the accuracy of the test data; 2. The test system can be compatible with multiple frequency bands and multiple input signal requirements, has strong applicability, does not need to additionally increase test accessories, saves test preparation time and test cost; 3. The test system can quickly determine the fault cause through self-checking function and signal monitoring function, reduce the fault locating time in the phased array radar antenna test process, and improve the test efficiency.

[0017] It should be understood that the foregoing general description and the following detailed description are only examples and explanatory, and are not restrictive of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application. It is readily apparent to one skilled in the art that the following description is merely illustrative and explanatory of some embodiments of the present application, and that other embodiments can be readily devised without departing from the spirit and scope of the present application. In the drawings: Figure 1 Fig. 1 shows a structure schematic diagram of a microwave anechoic chamber test system based on a phased array radar antenna according to an embodiment of the present application.

[0019] REFERENCE NUMERALS 1 - transceiving amplifier box product end, 2 - transceiving amplifier box beacon end, 3 - switch box, 4 - phased array radar antenna, 5 - beacon horn, 6 - instrument equipment, 7 - transmission cable. DETAILED DESCRIPTION

[0020] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout.

[0021] Moreover, described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the

[0022] In order to make the objects, technical solutions and advantages of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The embodiments of the present application will be described in detail below with reference to the drawings. The embodiments described below and the features in the embodiments can be combined with each other without conflict.

[0024] To solve the technical problems in the prior art, the embodiments of the present application provide a microwave anechoic chamber test system based on a phased array radar antenna, comprising: a transceiving amplifier box product end, a transceiving amplifier box beacon end, a switching switch box, a beacon horn antenna and a phased array radar antenna; The transceiving amplifier box product end is internally provided with a receiving channel and a transmitting channel, the transceiving amplifier box product end is connected with the receiving interface and the transmitting interface of the phased array radar antenna, and the transmission of a radio frequency signal is realized; The transceiving amplifier box beacon end is internally provided with a receiving channel and a transmitting channel, the transceiving amplifier box beacon end is connected with the beacon horn antenna, and the beacon horn antenna is arranged in alignment with the phased array radar antenna; The switching switch box is internally provided with a receiving channel and a transmitting channel, the switching switch box is connected with the transceiving amplifier box product end and the transceiving amplifier box beacon end respectively, and is used for switching the signal direction of the phased array radar antenna to the beacon horn.

[0025] In some feasible embodiments, based on the foregoing scheme, the system further comprises an instrument device used for signal analysis and measurement, and the instrument device is connected with the switching switch box.

[0026] In some feasible embodiments, based on the foregoing scheme, the instrument device can be a vector network analyzer, a signal source, a spectrum analyzer, a transmitter or a receiver.

[0027] In some feasible embodiments, based on the foregoing scheme, the transceiving amplifier box product end is provided with a plurality of interfaces and is provided with an interface switching module used for switching the connection state of the plurality of interfaces.

[0028] It can be understood that the plurality of interfaces arranged can be compatible with a plurality of different devices.

[0029] In some feasible embodiments, based on the foregoing scheme, the transceiving amplifier box product end is provided with a self-checking module, which is used for detecting the working state of the transceiving amplifier box product end and signal monitoring.

[0030] It can be understood that the working state of the transceiving amplifier box product end can be autonomously adjusted according to the monitored information, for example, adjusting the amplitudes of the received signal and the transmitted signal, the continuous or pulsed power supply, whether the transceiving amplifier box product end is in a protection state or a working state.

[0031] In some possible embodiments, based on the foregoing scheme, the control switch is arranged on the receiving channel and the transmitting channel arranged in the transceiving amplifier box product end.

[0032] It can be understood that the control switch arranged can control the transceiving channel according to the test index of the phased array radar antenna, and control the signal amplitude according to the signal amplitude requirement.

[0033] It should be noted that in the embodiments of the present application, the transceiving amplifier box beacon end is arranged in the same way as the transceiving amplifier box product end, and the difference is that the switch arranged is used to switch the beacon horn.

[0034] In some possible embodiments, based on the foregoing scheme, the switching switch box is provided with a self-checking module for detecting the working state of the switching switch box and signal monitoring.

[0035] In some possible embodiments, based on the foregoing scheme, the control switch is arranged on the receiving channel and the transmitting channel arranged in the switching switch box, for controlling the direction of the received signal and the transmitted signal.

[0036] It should be noted that the receiving channel and the transmitting channel arranged in the switching switch box can be multiple channels.

[0037] In some possible embodiments, based on the foregoing scheme, the beacon horn antenna can be a aperture antenna, a slot antenna, a dipole antenna, an end-fire antenna or a surface-mounted antenna.

[0038] It should be noted that it is difficult to design an antenna to work in a full frequency band, and a horn needs to be designed separately according to different frequency bands. In the embodiments of the present application, multiple antennas can be used, which can be aperture antennas, slot antennas, dipole antennas, end-fire antennas or surface-mounted antennas.

[0039] For example, as shown in Figure 1 , a structure schematic diagram of a microwave anechoic chamber test system based on a phased array radar antenna according to an embodiment of the present application is shown.

[0040] As shown in Figure 1 , the system comprises a transceiving amplifier box product end 1, a transceiving amplifier box beacon end 2, a switching switch box 3, a phased array radar antenna 4 and a beacon horn antenna 5.

[0041] The transceiving amplifier box product end 1 is connected with the phased array radar antenna 4 by using a transmission cable and is arranged in a microwave darkroom. The transceiving amplifier box beacon end 2 is connected with the beacon horn antenna 5 by using a transmission cable and is arranged in the darkroom. The switch box 3 is connected with the transceiving amplifier box product end 1 and the transceiving amplifier box beacon end 2 by using transmission cables respectively. The testing instrument 6 is connected with the switch box 3 by using a transmission cable.

[0042] It should be noted that the transmission cable used in the example is a coaxial cable for lossless transmission of electromagnetic wave signals. Since the loss of high frequency is large during full-band transmission, segmented transmission can be used, and multiple coaxial cables or waveguides can be used.

[0043] A test example of the microwave darkroom test system is provided below.

[0044] Before testing, the microwave darkroom test system has been detected and calibrated. When measuring the EIRP index of the phased array radar antenna, the microwave darkroom test system is controlled by the host control program to be set in the EIRP test mode. The excitation signal is input from the instrument 6, enters the switch box 3, and the switch box 3 is set to amplify and output the excitation signal in the transmission channel and output the excitation signal to the transceiving amplifier box product end interface. The excitation signal is input to the transceiving amplifier box product end 1 through the transmission cable 7, and the transceiving amplifier box product end 1 is set to amplify and output the excitation signal in the transmission channel and output the excitation signal to the phased array radar antenna excitation interface. The excitation signal is input to the phased array radar antenna 4 excitation interface through the transmission cable 7.

[0045] After the phased array radar antenna 4 inputs the excitation signal, the electromagnetic wave signal is output to the microwave darkroom space in the transmission mode. The beacon horn antenna 5 receives the electromagnetic wave signal and outputs it to the transceiving amplifier box beacon end 2 through the transmission cable. The control program sets the transceiving amplifier box beacon end 2 to the receiving mode to amplify and output the received electromagnetic wave signal. The electromagnetic wave signal output by the phased array radar antenna 4 is input to the switch box 3 through the transmission cable. The program controls the receiving channel of the switch box 3 to be opened to amplify and output the signal to the instrument 5 for output storage and analysis.

[0046] The microwave darkroom test system has the same working mode control during the test of the phased array radar antenna index. The self-checking mode can realize the detection and monitoring of the signal and timely analysis and reporting of the test situation. The microwave darkroom test system can test the technical index according to the test steps. Specifically, a report is formed according to the test results during the test process, and after the data is autonomously qualified, the next process is entered.

[0047] The microwave darkroom test system improves the accuracy of test data, reduces the preparation time and the cost of preparation auxiliary components, and improves the test efficiency compared with the existing test system in the test process of the phased array radar antenna.

[0048] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope of the application being indicated by the following claims.

Claims

1. A phased array antenna based microwave anechoic chamber test system, characterized in that, The system comprises a transceiving amplifier box product end, a transceiving amplifier box beacon end, a switch box, a beacon horn antenna and a phased array radar antenna. The transceiving amplifier box product end is internally provided with a receiving channel and a transmitting channel, and is connected with receiving and transmitting interfaces of the phased array radar antenna to realize transmission of radio frequency signals. The transceiving amplifier box beacon end is internally provided with a receiving channel and a transmitting channel, and is connected with the beacon horn antenna which is arranged in alignment with the phased array radar antenna. The switch box is internally provided with a receiving channel and a transmitting channel, and is connected with the transceiving amplifier box product end and the transceiving amplifier box beacon end respectively to switch the signal direction of the phased array radar antenna to the beacon horn. The system further comprises an instrument device for signal analysis and measurement, which is connected with the switch box.

2. The system of claim 1, wherein, The instrument device can be a vector network analyzer, a signal source, a spectrum analyzer, a transmitter or a receiver.

3. The system of claim 2, wherein, The transceiving amplifier box product end is provided with multiple interfaces and an interface switching module for switching the connection state of the multiple interfaces.

4. The system of claim 1, wherein, The transceiving amplifier box product end is provided with a self-checking module for detecting the working state and monitoring the signal of the transceiving amplifier box product end.

5. The system of claim 4, wherein, The receiving channel and the transmitting channel internally provided in the transceiving amplifier box product end are provided with control switches.

6. The system of claim 4, wherein, The switch box is provided with a self-checking module for detecting the working state and monitoring the signal of the switch box.

7. The system of claim 1, wherein, The receiving channel and the transmitting channel internally provided in the switch box are provided with control switches for controlling the direction of the received signal and the transmitted signal.

8. The system of claim 7, wherein, The beacon horn antenna can be a aperture antenna, a slot antenna, a dipole antenna, an end-fire antenna or a surface-mounted antenna.

9. The system of claim 1, wherein, ​

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