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A waveguide switched-susceptance (diode-patch) phase shifter

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3 Author(s)
Virga, K.L. ; Hughes Aircraft Co., El Segundo, CA, USA ; Seaton, A.F. ; Walker, L.R.

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 degrees phase shifter and a five-patch 45.0 degrees 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.<>

Published in:

Microwave Symposium Digest, 1989., IEEE MTT-S International

Date of Conference:

13-15 June 1989