Design of Low-Profile Millimeter-Wave Substrate Integrated Waveguide Power Divider/Combiner |
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Authors: | Kaijun Song Yong Fan Yonghong Zhang |
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Affiliation: | (1) School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, People’s Republic of China |
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Abstract: | A low-profile millimeter-wave substrate integrated waveguide (SIW) power divider/combiner is presented in this paper. The simplified model of this compact SIW power dividing/combining structure has been developed. Analysis based on equivalent circuits gives the design formula for perfect power dividing/combining. In order to verify the validity of the design method, a four-way SIW power divider/combiner circuit operating at Ka band is designed, fabricated and measured. Good agreement between simulated and measured results is found for the proposed passive power divider/combiner. Experiments on the four-way passive divider/combiner back-to-back design demonstrate a minimum overall insertion loss of 1.5 dB at 31.1 GHz, corresponding to a power-combining efficiency of 84%. The measured 10-dB return loss bandwidth is demonstrated to be 2.2 GHz, and its 0.5-dB bandwidth was 2 GHz. |
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Keywords: | Substrate integrated waveguide (SIW) Power divider Combiner Millimeter wave Radial cavity Current probe Low profile |
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