Open AccessMiniaturised dual‐band rat‐race coupler with harmonic suppression using synthetic transmission line
Author(s) -
Chen C.C.,
Sim C.Y.D.,
Wu Y.J.
Publication year - 2016
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.2016.2154
Subject(s) - rat race coupler , microstrip , multi band device , stub (electronics) , hybrid coupler , electric power transmission , transmission line , electrical impedance , electrical engineering , physics , electronic engineering , engineering , power dividers and directional couplers , antenna (radio)
A dual‐band 90° unit module with harmonic suppression (HS) is proposed. This unit module consists of a pair of back‐to‐back stepped impedance sections and an open stub. The unit module is realised by synthetic transmission lines, and it is successfully implemented into a novel miniature dual‐band (2.45/5.8‐GHz) rat‐race coupler with HS (suppression level ≥16 dB, 6.8–13 GHz). Compared with traditional 1.5 λ microstrip ring hybrid, the proposed dual‐band rat‐race with HS only occupies 13.84% of its area.