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MMIC broadband braided microstrip coupler
Author(s) -
Willems David A.
Publication year - 1994
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650071510
Subject(s) - return loss , broadband , microstrip , hybrid coupler , bandwidth (computing) , rat race coupler , monolithic microwave integrated circuit , microwave , materials science , magic tee , power dividers and directional couplers , optoelectronics , electrical engineering , engineering , telecommunications , amplifier , antenna (radio)
This article presents a broadband quadrature coupler realized using a novel braided microstrip structure that consists of 64 air‐bridge crossovers. The test results of the 2.5–8‐GHz single‐section coupler fabricated on a 125‐μm‐thick GaAs substrate are presented. This coupler achieved better than 17‐dB return loss, 11 dB of isolation and ±0.75 of amplitude variation over the almost 2‐octave bandwidth. This bandwidth and performance are the best reported for a braided microstrip coupler. © 1994 John Wiley & Sons, Inc.