摘要
利用微带电路作成的行波管外平衡器的理论研究和实验工作已经完成。为了进一步改进行波管的性能,本文对平衡器的设计计算方法进行了讨论,改进设计了一个单级平衡器,使在2.8—7.0GHz的频带内增益起落从11.6dB降为2.74dB。同时提出不对称增益特性的双级复式补偿平衡器的概念和方法,设计和研制了一个双级平衡器。利用计算机对微波电路参量进行了优选调整后,在2.5—7.5GHz的频带内,增益起落从13.6dB降为2.73dB。实验结果的变动量为5dB。
Theoretical and experimental research have been done for external TWT equalizer by using microstrip circuit. In order to further improve the performance of TWT, a CAD method is employed to optimize the circuit parameters, and then the gain variation can be reduced from 11.2 dB to 2.74 dB at a bandwidth of 2.8-7.0 GHz. A two-stage equalizer has been also tested. After adjusting six parameters in the microstrip circuit by the use of computer, the gain variation could be reduced from 13.6 dB to 2.73 dB at a bandwith of 2.5-7.5 GHz. But the experimental results is about 5 dB. The deviation between them is analyzed qualitatively.
关键词
行波管
平衡器
CAD
反射电路
Travelling wave tube
Equalizer
Insertion loss
Gain frequency characteristics
