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在飞行器再入大气层时,由于运动速度极高,在它周围产生等离子鞘,引起通讯中断.为了解决通讯中断问题,首先必须了解电子密度的大小及其分布.研究再入等离子体的方法很多,其中天线阻抗法是一种行之有效的方法.本文首先介绍了天线阻抗法的原理,其次简单地描述了我们研制的 S 波段天线阻抗测试仪,最后介绍在电弧风洞中的实验结果.
In the reentry atmosphere of the aircraft, due to the extremely high velocity of movement, a plasma sheath is generated around it, causing the communication to be interrupted.In order to solve the problem of communication interruption, we must first understand the size and distribution of electron density.Researching the plasma into many ways, Antenna impedance method is an effective method.This paper first introduces the principle of antenna impedance method, followed by a brief description of our S-band antenna impedance tester, and finally introduces the experimental results in the arc wind tunnel.