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A non‐reciprocal bandpass diplexer
Author(s) -
Wu Xiaohu,
Nafe Mahmoud,
Melcón Alejandro Álvarez,
GómezDíaz Juan Sebastián,
Liu Xiaoguang
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22592
Subject(s) - diplexer , band pass filter , resonator , reciprocal , microstrip , channel (broadcasting) , bandwidth (computing) , electronic engineering , telecommunications , physics , computer science , optoelectronics , optics , engineering , linguistics , philosophy
This letter presents a non‐reciprocal diplexer with integrated functions of a conventional bandpass diplexer and two isolators. This is achieved by spatio‐temporally modulating the resonator frequencies in a coupled‐resonator diplexer. Due to the high channel‐to‐channel isolation, the diplexer channels can be independently modulated without affecting each other. A microstrip diplexer example is demonstrated with good agreement between the measurement and the simulation. The fabricated diplexer has two non‐reciprocal bandpass channels at 829 and 997 MHz, with a minimal insertion loss of 4.9 and 6.1 dB, and a 20‐dB isolation bandwidth of 38 and 37 MHz, respectively. To the best of the authors' knowledge, this is the first time that a non‐reciprocal diplexer has been presented.