High Isolation Substrate Integrated Waveguide Diplexer With Flexible Transmission Zeros

This letter presents a high isolation substrate integrated waveguide (SIW) diplexer using dual-mode resonators. Each dual-mode SIW resonator can generate one transmission pole (TP) and one transmission zero (TZ) for the channel filter. The frequencies of the TZs can be easily controlled by the pertu...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 30; no. 11; pp. 1029 - 1032
Main Authors Cheng, Fei, Gu, Chao, Zhang, Bing, Yang, Yang, Huang, Kama
Format Journal Article
LanguageEnglish
Published IEEE 01.11.2020
Subjects
Couplings
Diplexer
dual-mode
high isolation
Magnetic resonance
Passband
Resonators
substrate integrated waveguide (SIW)
Substrates
Wireless communication
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Summary:This letter presents a high isolation substrate integrated waveguide (SIW) diplexer using dual-mode resonators. Each dual-mode SIW resonator can generate one transmission pole (TP) and one transmission zero (TZ) for the channel filter. The frequencies of the TZs can be easily controlled by the perturbation vias. One channel filter's two TZs' frequencies are designed to cover the other channel filter's passband. Thus, high isolation performance is achieved. The proposed diplexer is designed and fabricated with lower and upper channels centered at 8.04 and 9.07 GHz, respectively. Simulated and measured results are in good agreement for the two channels with better than 49/53-dB channel isolation.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2020.3025698