Wenchen Xiang, Ningfeng Bai, Xiaohan Sun, P. Pan, Jun Cai, Jinjun Feng, Yang Xie, W. Hong
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A Large Bandwidth Double-layer Asymmetric Planar Microstrip Line Ka Band Traveling Wave Tube
We present a double-layer asymmetric microstrip line slow wave structure (ADL MML-SWS) amplifies dual band signals at Ka-band this paper. This ADL MML-SWS has two signals at the same time, which can be excited by two electron beams. The center frequency of the low-band signal is 30 GHz and the center of high-band signal is 38 GHz. At 30GHz, the output power is 28.125w, with a gain of 37.5dB, and at 38GHz, the output power is 30.03w, with a gain of 37.8dB. The structure has a wide bandwidth, covering the entire Ka-band of 27GHz42GHz, and the gain in the entire band is nearly constant, varies in 2 dB.
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