Waveguide switched-susceptance (diode-patch) phase shifter

K. L. Virga, A. F. Seaton, L. R. Walker

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


A digital p-i-n diode phase shifter that operates in double-ridge waveguide is described. The phase shifter consists of several split conductive patches etched on a dielectric strip which is inserted in the longitudinal direction in the waveguide. The upper and lower half of each split patch are electrically connected by a diode that is switched between forward and reverse bias to shift the phase in the waveguide. A four-patch 22.5° phase shifter and a five-patch 45.0° phase shifter were designed and fabricated using a computer design program. The measured voltage standing-wave ratio and phase shift performance of the phase shifters are shown. Both phase shifters have less than 0.4-dB insertion loss and less than -40-dB interwaveguide coupling.

Original languageEnglish (US)
Pages (from-to)123-126
Number of pages4
JournalIEEE MTT-S International Microwave Symposium Digest
StatePublished - 1989
EventIEEE MTT-S International Microwave Symposium Digest 1989 - Long Beach, CA, USA
Duration: Jun 13 1989Jun 15 1989

ASJC Scopus subject areas

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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