DC-20-GHz compact SPQT switch for butler matrix switched beam smart antenna system

Jeng Han Tsai*, Hung Da Shih

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A DC-20-GHz broadband and compact single-pole-quadruple-throw (SPQT) switch for Butler matrix switched beam smart antenna system application has been designed and fabricated on 0.15-μm GaAs pHEMT process. By adopting inductive high impedance transmission lines in series-shunt switch topology, the SPQT switch demonstrates an insertion loss of 1.25-3.53 dB from DC to 20 GHz, and the isolation is higher than 22 dB with a compact chip size of 1.5 mm 2. The measured output 1 dB compression point (OP 1 dB) is 16 dBm at 12 GHz.

Original languageEnglish
Pages (from-to)2023-2026
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number9
Publication statusPublished - 2012 Sept


  • monolithic microwave integrated circuit
  • single-pole-quadruple-throw
  • switch

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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