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Wideband Hybrid Ring Coupler Based on Half-Mode Substrate Integrated Waveguide

A substrate integrated waveguide ring coupler and a half-mode substrate integrated waveguide ring coupler in X-band are designed from the principle of traditional 180 ° hybrid ring coupler. The HMSIW hybrid ring coupler, adopted closed side to closed side designing for connections of HMSIW branches,...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2014-09, Vol.24 (9), p.596-598
Main Authors: Zou, Xiong, Tong, Chuang-Ming, Li, Chang-Ze, Pang, Wei-Jian
Format: Article
Language:English
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Summary:A substrate integrated waveguide ring coupler and a half-mode substrate integrated waveguide ring coupler in X-band are designed from the principle of traditional 180 ° hybrid ring coupler. The HMSIW hybrid ring coupler, adopted closed side to closed side designing for connections of HMSIW branches, is proposed for the first time. It has 24.6% bandwidth for the amplitude imbalance of coupling coefficient less than ±0.5 dB and phase differences between outputs are 15.0 ° ~ -5.8 ° and 175.5 ° ~ 189.7 ° for the in-phase and the out-of-phase operations, respectively, which shows much better performance than SIW coupler.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2014.2328899