Miniaturized Dual-Band Bandpass Filter With Sharp Roll-Off Using Ring-Loaded Resonator

Daotong Li; Ju-An Wang; Ying Liu; Zhen Chen

doi:10.1109/ACCESS.2019.2958390

IEEE Access (Jan 2020)

Miniaturized Dual-Band Bandpass Filter With Sharp Roll-Off Using Ring-Loaded Resonator

Daotong Li,
Ju-An Wang,
Ying Liu,
Zhen Chen

Affiliations

Daotong Li: ORCiD; Center of Communication and Tracking Telemetry Command, Chongqing University, Chongqing, China
Ju-An Wang: ORCiD; Center of Communication and Tracking Telemetry Command, Chongqing University, Chongqing, China
Ying Liu: ORCiD; Center of Communication and Tracking Telemetry Command, Chongqing University, Chongqing, China
Zhen Chen: ORCiD; Center of Communication and Tracking Telemetry Command, Chongqing University, Chongqing, China

DOI: https://doi.org/10.1109/ACCESS.2019.2958390
Journal volume & issue: Vol. 8
pp. 25588 – 25595

Abstract

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In this paper, a miniaturized dual-band bandpass filter (BPF) with good selectivity based on ring-loaded resonator (RLR) and 0° feed structure is proposed. First, the RLR is investigated theoretically and numerically, and a miniaturized Filter I is designed based on the RLR and filter synthesis approach. Secondly, based on the coupling structure of the previous BPF and theory of 0° feed structure, the sub Filter II is formed. By appropriately adjusting the location of the I/O ports, the dual-band filter can be achieved simply. The proposed dual-band BPF provides compact size and satisfactory out-of-band rejection between each band with multiple transmission zeros (TZs) introduced by source/load coupling and a special coupling scheme.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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