Frequency-sensitive attenuator

Wave transmission lines and networks – Attenuators

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333 33, 333 73W, H01P 122, H01P 120

Patent

active

039581942

ABSTRACT:
A miniature waveguide attenuator which may be used in a dominant-mode (TEb.10) waveguide to maintain a low VSWR over a 20% frequency band comprising a short section of waveguide with an E- or an H-plane tee whose width is selected to set the cutoff frequency of the branch line of the tee at the design frequency F.sub.o. The branch line of the tee is terminated in a lossy material followed by a short circuit for absorbing energy propagating down the waveguide at frequencies higher than the design frequency in accordance with a controlled attenuation characteristic.

REFERENCES:
patent: 2766431 (1956-10-01), Barker, Jr.
patent: 3058072 (1962-10-01), Rizzi et al.
patent: 3493898 (1970-02-01), Ward
patent: 3639862 (1972-02-01), Craven et al.

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