Study on Window-Output Cylindrical Cavity Multiple-Device Oscillators/Amplifiers and Their Parallel Running Operation.

研究了窗口输出圆柱腔多器件振荡器/放大器的功率合成特性，得到了以下结果。(1)基于电路模型的振荡器模式分析表明，&lt；TM_(Ono)&gt；和&lt；TM_(M10)&gt；-模都可以是功率合成模式，并给出了功率合成在期望模式下稳定工作的条件。(2)用有限元方法计算了组合器腔内的电磁场和器件与腔场的耦合。(3)利用体效应二极管进行的实验表明，与TM_(020)&gt；模一样，&lt；TM_(210)&gt；模可以获得近乎完美的功率合成，并且功率合成效率随着n和m的增加而逐渐降低，在&lt；TM_(810)&gt；模下的功率合成比在&lt；TM_(040)&gt；模下的功率合成效率高。这些实验结果与基于器件-场耦合的评价定性一致。(4)用TM_(020)&gt；模多器件腔对透射型功率放大器和反射型功率放大器的实验表明，后者的功率合成效率和频率响应优于前者。(5)两个TM_(020)和GT；模振荡器的并联运行显示了近乎完美的功率合成能力。当其中一个振荡器中的一个或两个器件发生故障时，振荡器的输出功率可以在并联运行中部分恢复。

Power-combining characteristics of window-output cylindrical cavity multiple-device oscillators/amplifiers are investigated to give the following results. (1) A mode analysis of the oscillators based on circuit models shows that both <TM_(ono)> - and <TM_(m10)> - modes can be power-combining modes, and gives the condition for stable power-combining operation in the desired mode. (2) The electromagnetic field in the combiner cavities and the coupling of devices to the cavity field is calculated using finite element method. (3) By the experiments using Gunn diodes, it is shown that almost perfect power combining in <TM_(210)> mode can be achieved as in <TM_(020)> mode and the power combining efficiency decreases gradually with increasing n and m. Power combining in the <TM_(810)> mode gives higher efficiency then in the <TM_(040)> mode. These experimental results agree qualitatively with the evaluation based on the device-field coupling. (4) The experiments of both transmission- and reflection-type power amplifiers with the <TM_(020)> -mode multiple-device cavity show that the power-combining efficiency and the frequencyresponse are better in the latter than in the former. (5) The parallel running of two <TM_(020)> -mode oscillators shows the capability of almost perfect power combining. In the case when one or two devices fall into breakdown in one of the oscillators, the output power of the oscillator can be recovered partially in the parallel running.