20 cm離子推力器羽流對微波通信影響的試驗研究

Test of the effect of 20 cm ion thruster's plume on microwave transmission

摘要: 離子推力器工作時產(chǎn)生的等離子體羽流會對穿過其間的電磁波產(chǎn)生影響。為了解通信微波在羽流中的傳輸特性，在帶有透波真空艙的專用設(shè)備上進行了羽流對微波通信影響的試驗。采用的方法是將一對發(fā)射和接收雙脊喇叭天線口緊貼透波艙兩側(cè)并正對放置來測試穿過羽流的通信微波的變化情況。試驗結(jié)果表明：在1～5 GHz微波通信頻段范圍內(nèi)，離子推力器所產(chǎn)生的羽流對電磁波的波幅和相位影響較小，幅度衰減不超過4 dB，相位偏差不超過80°。

Abstract: The exhaust plasma plume from the ion thruster would affect the electromagnetic wave that passes through it. To reveal the effect of 20 cm ion thruster's plume on the transmission of the microwave, tests were carried out in a special facility with a wave- transmitting vacuum tank. The test approach is to locate a pair of receiving and emission horn antennas at two ends of the tank over against to detect the microwave passing through the plasma plume. The results indicate that the amplitude attenuation is less than 4 dB and the phase shift is not more than 80° in the 1.0～5.0 GHz microwave band.