Attenuation and time delay equalizer for a waveguide filter

Details Attenuation and time delay equalizer for a waveguide filter Attenuation and time delay equalizer for a waveguide filter

1986-10-08

1988-03-15

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Equalizers

333159, 333208, 333209, H01P 900, H01P 706, H01P 120

Patent

active

047315938

ABSTRACT:
An arrangement for the equalization of attenuation and time delay in a microwave filter utilizing waveguide technology. An equalizer composed of a multi-circuit cavity resonator is coupled via a first coupling aperture to a waveguide which is connected to the filter. The resonator includes at least two individual waveguide sections coupled to each other via a second coupling aperture. The coupling apertures are dimensioned so that the resonator is critically coupled with respect to time delay characteristics. The resonator includes a power-absorbing tuning device for tuning all of the waveguide sections to substantially the same quality factor. The second coupling aperture presents a stepped cross section defining a first area and a second area having a larger cross section than the first area. The resonator further includes at least two screws arranged symmetrically with respect to the longitudinal axis of the resonator and protruding laterally into the second area of the second coupling aperture. The screws influence the time delay of the equalizer as a function of their depth of penetration into the second area.

REFERENCES:
patent: 4437073 (1984-03-01), Thal, Jr.
Wanselow, Robert D., Journal of the Franklin Institute, vol. 292, No. 3, Sep. 1971, pp. 179-192.

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