A Compact Tunable Bandpass Filter Using Switchable Varactor-Tuned Dual-Mode Resonator

Minjae Jung, Byung Wook Min

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

1 Citation (Scopus)

Abstract

A novel switchable dual-mode resonator is presented for a compact tunable bandpass filter (BPF) with a wide frequency tuning range and a constant absolute bandwidth (ABW). The dual-mode resonator switches between a low-band state and a high-band state with p-i-n diodes to overcome the limited tunability of varactor diodes. The bandpass frequency can be easily tuned by controlling two resonant frequencies of each state using the varactor diodes and the ABW remains constant by tapped-line input and output coupling. To verify the presented structure, a 2-pole tunable BPF is fabricated and measured, which shows an in-band insertion loss of 2.3-5.8 dB maintaining a constant 3-dB ABW of 110 MHz with a tuning range from 360 MHz to 970 MHz.

Original languageEnglish
Title of host publicationProceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1374-1377
Number of pages4
ISBN (Print)9781538650677
DOIs
Publication statusPublished - 2018 Aug 17
Event2018 IEEE/MTT-S International Microwave Symposium, IMS 2018 - Philadelphia, United States
Duration: 2018 Jun 102018 Jun 15

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
Volume2018-June
ISSN (Print)0149-645X

Conference

Conference2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
Country/TerritoryUnited States
CityPhiladelphia
Period18/6/1018/6/15

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work was supported by YSSRC and Space Core Technology Program through the National Research Foundation of Korea funded by the Ministry of Science and ICT. (NRF-2017M1A3A3A02016255).

Publisher Copyright:
© 2018 IEEE.

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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