05138289 is referenced by 41 patents and cites 4 patents.

A noncontacting waveguide backshort is provided for use with frequencies of interest between 1 and 1000 GHz including a relatively rugged metallic bar movably mounted within the waveguide in a MYLAR insulator. A series of regularly shaped and spaced circular or rectangular openings are made in the metallic bar to form sections of high impedance alternating with sections of the bar having low impedance. This creates a periodic impedance variation which serves to provided an adjustable short circuit in a waveguide for the frequencies of interest.

Title
Noncontacting waveguide backshort
Application Number
7/631639
Publication Number
5138289
Application Date
December 21, 1990
Publication Date
August 11, 1992
Inventor
William R McGrath
Monrovia
CA, US
Agent
Norman E Brunell
Assignee
California Institute of Technology
CA, US
IPC
H01P 1/28
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