A novel planar type broadband CMOS on-chip balun with relative bandwidth of 158%

Tadashi Takagi, Eita Nakayama, Tuan Thanh Ta, Suguru Kameda, Noriharu Suematsu, Kazuo Tsubouchi

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

1 Citation (Scopus)

Abstract

A novel planar type broadband balun having a symmetrical structure has been proposed. Considering a lossless and uniform material, balun operation is analyzed and impedance matching condition is formulated. Applying the proposed balun configuration, and using CMOS multi-layer structure, a CMOS on-chip balun has been fabricated. The fabricated balun has achieved ultra-broadband performance. Measured characteristics of the balun are return loss of more than 8dB, insertion loss of 1.5 ∼ 6.3dB from the unbalanced to the balanced ports, and the amplitude difference and phase difference between the balanced ports of -0.2 ∼ +1.5dB and 173.5 ∼ 179deg, respectively, over the frequency range of 13 ∼ 110GHz.

Original languageEnglish
Title of host publication2012 Asia-Pacific Microwave Conference, APMC 2012 - Proceedings
Pages178-180
Number of pages3
DOIs
Publication statusPublished - 2012 Dec 1
Event2012 Asia-Pacific Microwave Conference, APMC 2012 - Kaohsiung, Taiwan, Province of China
Duration: 2012 Dec 42012 Dec 7

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC

Other

Other2012 Asia-Pacific Microwave Conference, APMC 2012
CountryTaiwan, Province of China
CityKaohsiung
Period12/12/412/12/7

Keywords

  • Balun
  • CMOS
  • microwave
  • millimeter-wave
  • multi-layer structure
  • planar type
  • ultra-broadband

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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