Hairpin filters with tunable transmission zeros

Chih-Ming Tsai, Sheng Yuan Lee, Chin Chuan Tsai

Research output: Contribution to journalConference articlepeer-review

19 Citations (Scopus)


In the previous work, it was found that filter designed with 0° feed structure could have two extra transmission zeros in the stopband. In this paper, a method for tuning the frequencies of these two transmission zeros using impedance transformers is proposed. These zeros can be tuned to reject unwanted signals near the passband, such as image signals. This new approach has been experimentally verified with three second-order Butterworth filters.

Original languageEnglish
Pages (from-to)2175-2178
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
Publication statusPublished - 2001 Dec 1
EventInternational Microwave Symposium Digest IEEE MTT-S 2001 - Phoenix, AZ, United States
Duration: 2001 May 202001 May 25

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Hairpin filters with tunable transmission zeros'. Together they form a unique fingerprint.

Cite this