%0 Journal Article
%T A Compact Ka-Band Broadband Waveguide-Based Traveling-Wave Spatial Power Combiner with Low Loss Symmetric Coupling Structure
%A Zhi-Yong Kang
%A Qing-Xin Chu
%A Qiong Sen Wu
%J PIER     Letters
%D 2013
%I EMW Publishing
%R 10.2528/PIERL12111311
%X A compact Ka-band broadband waveguide-based traveling-wave spatial power combiner is presented. The low loss micro-strip probes are symmetrically inserted into both broadwalls of waveguide, quadrupling the coupling ways but the insertion loss increases little. The measured 16 dB return-loss bandwidth of the eight-way back-to-back structure is from 30 GHz to 39.4 GHz (more than 25%) and the insertion loss is less than 1 dB, which predicts the power-combining efficiency is higher than 90%.
%U http://www.jpier.org/pierl/pier.php?paper=12111311