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Modal phase velocity compensation in multilayer differentially fed directional couplers
Author(s) -
Smolarz Robert,
Wincza Krzysztof,
Gruszczynski Slawomir
Publication year - 2020
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.32252
Subject(s) - power dividers and directional couplers , modal , hybrid coupler , compensation (psychology) , phase (matter) , phase velocity , phase compensation , optics , equalization (audio) , acoustics , dielectric , materials science , physics , engineering , optoelectronics , electrical engineering , psychology , quantum mechanics , psychoanalysis , channel (broadcasting) , polymer chemistry
In this article, we present for the first time the possibility of the modal phase velocity compensation in differentially fed directional couplers designed in inhomogeneous dielectric media. It is shown that in an appropriate, inhomogeneous dielectric structure, the equalization of even‐ and odd‐mode phase velocities propagating in such couplers can be made. The presented method has been verified experimentally by design and measurements of a fabricated coupler to show the correctness and applicability of the proposed solution. A 8‐dB differentially fed directional coupler has been designed as a edgewise structure operating at 1 GHz center frequency.