Quasi-optical waveguide filter

Details Quasi-optical waveguide filter Quasi-optical waveguide filter

1983-06-08

1986-07-01

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333212, 333 21A, H01P 1207

Patent

active

045982627

ABSTRACT:
A waveguide filter particularly well suited for use in the millimeter and submillimeter wavelength range of the spectrum. The filter includes a number of uniformly spaced gratings installed in a waveguide section and having grating strip patterns contoured to conform with a selected waveguide mode, such as the circular TE.sub.11 mode. The gratings are angularly oriented in the manner of a free-space plane-wave quasi-optical filter and provide similar desired frequency characteristics, but without the disadvantages of large size and the need for planewave launchers.

REFERENCES:
patent: 2476034 (1949-07-01), Fox
patent: 2985850 (1961-05-01), Crawford et al.
patent: 3146414 (1964-08-01), Marcatili
Saleh, Adel A. M., "An Adjustable Quasi-Optical Band Pass Filter: Parts 1 and 2" IEEE Transactions on Microwave Theory & Techniques, MTT22, #7, 7/1974, pp. 728-739.

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