一种新型的渐变脊径向波导空间功率合成器设计

Design of a Novel Ridged Radial Waveguide Spatial Power Combiner

摘要:

给出了一种新型的波导渐变脊的设计方法及其在波导空间功率合成器中的应用,该设计方法采用新型复合函数渐变曲线代替了传统的单一指数函数或三角函数渐变曲线,通过优化渐变脊的结构可以达到对频带内引起的谐振进行抑制的目的,并能降低功率合成器中的通路损耗；将该新型波导渐变脊结构用于30~40 GHz的波导空间功率合成器,经测试得到,由渐变脊组成的合成器部分在整个频段内插入损耗不足0.8 dB,整个无源合成器结构的输入端口驻波小于1.35,满足了合成器的使用要求。

Abstract:

A design of a novel ridged transition is presented and applied to radial waveguide spatial power combiner. This structure uses a novel complex function to replace the traditional method of exponential taper or triangular taper, the suppression of resonance frequency and the reduction of power combiner’s insertion loss can be realized by optimizing the structure of gradual ridge. This novel gradual ridge is applied in the 30~40 GHz broadband spatial power combiner. The measured results of this combiner show that the insertion loss of power combining part which is constituted by gradual ridge is less than 0.8 dB and the whole passive combiner’s VSWR is less than 1.35 in frequency range of 30~40 GHz, so it meets the requirements of the combiner.