Compact cascaded quadruplet bandpass filter (CQ-BPF) using folded loop resonator with via-hole

Tae Hak Lee, Kyoung Joo Lee, Young Sik Kim, Jung Woo Baik

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A compact cascaded quadruplet bandpass filter (CQ-BPF) using short-circuited loop resonators is proposed for size reduction. The short-circuited loop has a resonance at a half wavelength by utilizing a via-hole and is modified to a folded structure to reduce a loop size. Comparing with the conventional loop resonator, the proposed resonator shows a size reduction of about 81%. The frequency responses of the proposed BPF have also been calculated via transmission and reflection rational functions. The measured insertion and return losses at the designed center frequency of 2.12 GHz are about 2 dB and 15 dB, respectively. The group delay is less than 1.55 ns. The full wave simulated results are well agreed with the measured ones.

Original languageEnglish
Title of host publication2011 IEEE International RF and Microwave Conference, RFM 2011 - Proceedings
Pages154-156
Number of pages3
DOIs
Publication statusPublished - 2011
Event2011 4th IEEE International RF and Microwave Conference, RFM 2011 - Seremban, Malaysia
Duration: 2011 Dec 122011 Dec 14

Publication series

Name2011 IEEE International RF and Microwave Conference, RFM 2011 - Proceedings

Other

Other2011 4th IEEE International RF and Microwave Conference, RFM 2011
CountryMalaysia
CitySeremban
Period11/12/1211/12/14

Keywords

  • bandpass filter
  • cascaded quadruplet
  • coupling matrix
  • folded type resonator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Lee, T. H., Lee, K. J., Kim, Y. S., & Baik, J. W. (2011). Compact cascaded quadruplet bandpass filter (CQ-BPF) using folded loop resonator with via-hole. In 2011 IEEE International RF and Microwave Conference, RFM 2011 - Proceedings (pp. 154-156). [6168718] (2011 IEEE International RF and Microwave Conference, RFM 2011 - Proceedings). https://doi.org/10.1109/RFM.2011.6168718