Abstract
The paper presents a microstrip diplexer constructed by joining two stub-perturbed ring resonators at a T-junction. Each ring resonator acts as a bandpass filter with a transmission zero lying very close to the passband of the other filter, thereby increasing the isolation between the two channels. A short stub is additionally added at the T-junction to improve the matching at the common port. The diplexer is able to achieve a channel separation of 50 MHz, with the two channels centered at 2.49 GHz and 2.37 GHz respectively. This translates to a center frequency ratio of 1.05 between the two channels, which is the smallest amongst the published works. The insertion loss in both the channels is below 2.4 dB. The return loss at the three ports is around 20 dB, with the in-band channel isolation being greater than 20 dB.
Recommended Citation
K. Dhwaj et al., "Microstrip Diplexer With Low Channel-frequency Ratio," Asia-Pacific Microwave Conference Proceedings, APMC, article no. 7931420, Institute of Electrical and Electronics Engineers, May 2017.
The definitive version is available at https://doi.org/10.1109/APMC.2016.7931420
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Diplexer; Microstrip; Ring resonator; T-junction
International Standard Book Number (ISBN)
978-150901592-4
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
17 May 2017
