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卫星天线及星上无线系统检测常要求一个无反射自由空间以模拟太空环境。为此近年来利用微波吸收材料建造了各种类型的电波吸收室。有关形成无反射自由空间的设计已有不少论述。在此就不予讨论了。除此之外,往往还要求置于无反射自由空间的待测天线和系统不应受到外界任何电磁场的干扰。同时出于保密和电磁相容性考虑也不允许无反射自由空间的待测电磁场有任何泄漏。再加上保护操作人员免遭强功率高频电磁场危害问题也日渐引起重视。诸如这类问题一般都需通过电磁屏蔽来解决。目前有关系统地讨论电波吸收室电磁屏蔽
Satellite antenna and on-board wireless system detection often require a free space without reflection to simulate the space environment. In recent years, various types of radio wave absorbing rooms have been constructed using microwave absorbing materials. There has been a lot of discussion about the design of free space without reflection. Will not be discussed here. In addition, it is often required that the antenna under test and the system placed in a free-bounce free space should not be interfered with by any external electromagnetic field. At the same time, for reasons of confidentiality and electromagnetic compatibility, there is no leakage of the electromagnetic field to be measured in the free-space without reflection. Coupled with the protection of operators from strong power high-frequency electromagnetic field hazards have also attracted increasing attention. Problems such as these generally need to be resolved by electromagnetic shielding. The current system to discuss the electromagnetic wave absorption chamber electromagnetic shielding