Millimeter wave radiometer semi-physical simulation system, signal generating method and linearity testing method

Abstract

The invention discloses a millimeter wave radiometer semi-physical simulation system, a signal generating method and a linearity testing method. The system comprises an echo-free isolation box, a target simulator, a millimeter wave radiometer, a control circuit and an upper computer. The signal generating method is used for controlling a voltage control attenuator of a target simulator by generating a certain control voltage, and the target simulator can generate a signal for use in the overall dynamic testing and static performance parameter testing of the millimeter wave radiometer. By adopting the millimeter wave radiometer semi-physical simulation system, a good testing environment is provided for the overall testing and signal simulation of a missile-borne millimeter wave alternating current radiometer, and a method is provided for the included angle measurement of a terminal-sensitive projectile millimeter wave alternating current radiometer. The millimeter wave radiometer semi-physical simulation system has the advantages of low cost, small size, convenience in use, high performance, high electromagnetic shielding performance, low external influence, and the like.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave devices, in particular to a millimeter wave radiometer semi-physical simulation system, a signal generation method and a linearity test method. Background technique [0002] In the past ten years, with the maturity of domestic millimeter-wave device technology, breakthroughs have been made in the research of millimeter-wave passive detectors (millimeter-wave radiometers), and its cost has been further reduced. It has become the preferred detection method for smart ammunition, especially terminal-sensitive ammunition. device. [0003] The millimeter-wave passive detectors in terminal-sensitive bombs are mainly millimeter-wave AC radiometers, which need to be tested and calibrated before they are equipped. The tests include field dynamic tests and indoor static machine performance parameter tests. Static machine performance test includes sensitivity, integration time, dynamic range test, ta...

AI Technical Summary

Problems solved by technology

"Bomb-borne millimeter-wave radiometer signal hardware-in-the-loop simulation" gives a millimeter-wave radiometer hardware-in-the-loop simulation test system, working in the far-field condition, the control signal expression of the antenna temperature variation of the radiometer to detect the target , which solves the equivalent relationship between the actual distance detection and the hardware-in-the-loop simulation system in principle, but does not give the specific implementation method of the hardware-in-the-loop simulation system in the form of the voltage control signal of the target signal, which is intuitive and practical. There is no operability; "Development of Simulation Test System for 3mm Band Passive Detector" has made a detailed discussion on the hardware production and software design of the hardware-in-the-loop simulation system controller, and has also made a detailed analysis and discussion on the target signal simulation. In addition, an electronically adjustable attenuator is used to control the target simulation signal, which solves the problem of interface and connection between the signal control hardware, but it also does not give the expression of the voltage control signal during the target simulation and the specific signal control form during the test. , there is no direct connection between the control voltage signal on the electronically adjustable attenuator and the equivalent of the detection test signal on the actual distance

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