Common base HBTs for Ka-band applications

S. Tanaka, Y. Amamiya, S. Murakami, H. Shimawaki, N. Goto, Y. Takayama, K. Honjo

Research output: Contribution to conferencePaperpeer-review

4 Citations (Scopus)


It has been commonly accepted that common-base (CB) HBTs are more suitable for millimeter-wave power amplifier than common-emitter HBTs due to their superior gain. However, the essential gain behavior of CB HBTs is not well understood in detail, and thus the factors limiting their mm-wave performance are not yet clarified. In this work, basic design guidelines of CB HBTs are presented based on a detailed gain performance analysis. In particular, we stress the importance of improving the fT at high collector voltages and reducing the feedback component of wire parasitic capacitance. The analysis is in good agreement with the measured RF performance of the fabricated HBTs.

Original languageEnglish
Number of pages4
Publication statusPublished - 1997 Dec 1
EventProceedings of the 1997 Topical Symposium om Millimeter Waves - Hayama, Jpn
Duration: 1997 Jul 71997 Jul 8


OtherProceedings of the 1997 Topical Symposium om Millimeter Waves
CityHayama, Jpn

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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