K-band MMIC active band-pass filters

Kang Wei Fan*, Ching Chih Weng, Zuo-Min Tsai , Huei Wang, Shyh Kang Jeng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Two K-band active band-pass filters using 0.15-μm GaAs pHEMT technology, with one fixed-frequency and the other tunable, are designed, fabricated, and tested. The fixed-frequency filter has its central frequency at 22.6 GHz, with 900-MHz band-width (4%). The tunable filter can be tuned from 19.5 to 21.5 GHz with the same bandwidth. Both circuits have a common size of 1 mm × 1 mm. To our knowledge, the tunable filter is the highest frequency tunable active filter ever reported.

Original languageEnglish
Pages (from-to)19-21
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number1
StatePublished - 1 Jan 2005


  • Active band-pass filter
  • K-band
  • pHEMT

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