Open AccessWideband patch directional coupler based on non‐uniform mushroom structure
Author(s) -
Zhou Xin Yu,
Zheng Shao Yong,
Pu Xing Yu,
Chan Wing Shing,
Long Yunliang
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.4050
Subject(s) - wideband , hybrid coupler , power dividers and directional couplers , mushroom , acoustics , electronic engineering , physics , computer science , telecommunications , engineering , geology , paleontology
A wideband patch directional coupler is proposed. The coupler is designed based on the non‐uniform mushroom structure with unique characteristics. The current distribution within the patch can be controlled by the mushroom cells underneath for wideband property. An 8 dB directional coupler has been designed, fabricated and measured for verification. It exhibits good return loss, small coupling coefficient variation and quadrature phase difference among the output ports over a wide bandwidth of 74.6% centred at 8.45 GHz.