A compact 1.9-2.9 GHz tunable bandpass filter with wide stopband range

Yi Ming Chen, Sheng Fuh Chang, Zuo-Min Tsai , Tai Chuan Chao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

This paper presents a compact broadband tunable bandpass filter with wide stopband range. The combline topology is adopted, where the varactor-loaded stepped-impedance resonator is used for frequency tuning. A double-stub parallel-line transformer at input/output port is used for generating multiple transmission zeros and matching port and resonator impedances. The measured performances show that the tuning frequency range of 1.9 to 2.9 GHz (51% tuning range) is achieved. The insertion loss is between 2.9 dB and 1.5 dB and the return loss is better than 18.5 dB. The stopband suppression greater than 20 dB is obtained up to 10 GHz. The circuit design, EM simulation and experimental comparison are described.

Original languageEnglish
Title of host publication2013 Asia-Pacific Microwave Conference Proceedings, APMC 2013
Pages200-202
Number of pages3
DOIs
StatePublished - 1 Dec 2013
Event2013 3rd Asia-Pacific Microwave Conference, APMC 2013 - Seoul, Korea, Republic of
Duration: 5 Nov 20138 Nov 2013

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC

Conference

Conference2013 3rd Asia-Pacific Microwave Conference, APMC 2013
CountryKorea, Republic of
CitySeoul
Period5/11/138/11/13

Keywords

  • immittance inverter
  • transmission zero
  • Tunable bandpass filter

Fingerprint Dive into the research topics of 'A compact 1.9-2.9 GHz tunable bandpass filter with wide stopband range'. Together they form a unique fingerprint.

Cite this