A wide-band vacuum microwave anechoic chamber for ground simulation of high-speed target plasma environment in near space

Abstract

The invention provides a wide-band vacuum microwave anechoic chamber for ground simulation of a high-speed target plasma environment in adjacent space, which includes a vacuum tank body, a microwave anechoic chamber framework, a support mechanism and a composite electromagnetic wave absorber, and the microwave anechoic chamber framework is arranged in the vacuum tank body. A vacuum head flange is provided at one end of the vacuum tank, and the framework of the microwave anechoic chamber includes multiple connecting sections connected in sequence, and the connecting sections are connected to form a cylinder structure; one end of the microwave anechoic chamber framework is a multi-stage nested flange , the other end is equipped with a wave-absorbing shield door, and several pieces of composite electromagnetic wave absorbers are installed to completely cover the inner wall of the microwave anechoic chamber framework. As a result, the ferrite tile, matching layer and pyramidal absorbing material are arranged sequentially from bottom to top. The invention can provide a vacuum microwave anechoic chamber with a wide frequency band, which can be used for the plasma environment and electromagnetic communication research on the surface of a high-speed target in the adjacent space.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic measurement, in particular to a wide-band vacuum microwave anechoic chamber used for ground simulation of high-speed target plasma environment in adjacent space. Background technique [0002] Since the aircraft will have different flight altitudes and flight speeds during real flight, the geometric shape of the surface plasmon sheath is also different, which requires that the electromagnetic wave band covered by the research needs to have an extremely wide wave band, usually in the MHz- However, the current publicly reported electromagnetic experiment system for ground simulation in the near space environment generally studies electromagnetic bands ranging from 1 to tens of GHz, and signals under low frequency conditions (such as MHz) are usually not considered. That is to say, there is no vacuum microwave anechoic chamber that can achieve an extremely wide band, so it is necessary to desi...

AI Technical Summary

Problems solved by technology

[0002] Since the aircraft will have different flight altitudes and flight speeds during real flight, the geometric shape of the surface plasmon sheath is also different, which requires that the electromagnetic wave band covered by the research needs to have an extremely wide wave band, usually in the MHz- However, the current publicly reported electromagnetic experiment system for ground simulation in the near space environment usually studies electromagnetic bands ranging from 1 to tens of GHz, and signals under low frequency conditions (such as MHz) are usually not considered. That is to say, there is no vacuum microwave anechoic chamber that can achieve an extremely wide band, so it is necessary to design a vacuum anechoic chamber with a wide band to more realistically simulate the plasma environment formed around the high-speed target in the adjacent space, and carry out signal transmission in this environment , radar detection and other electromagnetic experiments

Images