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Wideband Waveguide Short-Slot 2-Plane Coupler Using Frequency Shift of Propagating Modes
Dong-Hun KIM Jiro HIROKAWA Makoto ANDO
IEICE TRANSACTIONS on Electronics
Publication Date: 2018/10/01
Online ISSN: 1745-1353
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
short-slot coupler, hybrid coupler, cross coupler, complementary propagating mode,
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A wideband design of the waveguide short-slot 2-plane coupler with 2×2 input/output ports is designed, fabricated, and evaluated. Using coupling coefficients of complementary propagating modes which are TE11, TE21, and TE30 modes, the flatness of the output amplitudes of 2-plane coupler is improved. The coupler operates from 4.96GHz to 5.27GHz (bandwidth 6.1%) which is wider than the former coupler without considering the complementary propagating mode from 5.04GHz to 5.17GHz (bandwidth 2.5%).