Microwave harmonic absorption filter

Details Microwave harmonic absorption filter Microwave harmonic absorption filter

1976-07-12

1977-11-29

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 34, 333 82B, 333 98R, H01P 120, H01P 122, H01P 116, H01P 126

Patent

active

040607780

ABSTRACT:
A microwave harmonic absorption filter is disclosed which has an extended single mode pass-band ranging over one or more octaves as well as enhanced attenuation in the stop-band. This filter has a primary, rectangular waveguide having one or more ridges on the inner surfaces of its elongated wall members. Secondary waveguides are provided on the outer surfaces of these wall members and these secondary waveguides serve to diminish propagation of microwave energy in the stop-band. Apertures extend through the wall members of the primary, ridged, rectangular waveguide so that microwave energy within the range of frequencies of the stop-band can be transmitted from the primary waveguide into the secondary waveguides.

REFERENCES:
patent: 2877434 (1959-03-01), Farr et al.
patent: 3187277 (1965-06-01), Wantuch
patent: 3353123 (1967-11-01), Met
Paine et al. "Harmonic Absorbing Filters in Waveguides" in Electrical Communication vol. 39, No. 2, 1964; pp. 260-264.

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