Resonant isolator for maser amplifier

Details Resonant isolator for maser amplifier Resonant isolator for maser amplifier

1981-03-23

1983-08-16

Moskowitz, Nelson

Amplifiers

Parametric amplifiers

Semiconductor type

332 75, 333 242, H01P 100, H01S 100, H01P 132

Patent

active

043994156

ABSTRACT:
An isolator is described for use in a low-noise maser amplifier, which provides low loss across a wide bandwidth and which can be constructed at moderate cost. The isolator (40) includes a train of garnet or ferrite elements (50, 52) extending along the length of a microwave channel (14) parallel to the slow-wave structure (24), with the elements being of staggered height, so that the thin elements (50) which are resonant to the microwaves are separated by much thicker elements (52). The thick garnet or ferrite elements reduce the magnetic flux passing through the thin elements (50), to permit altering of the shape of the thin elements so as to facilitate their fabrication and to provide better isolation with reduced loss, by increasing the thickness (T) of the thin elements and decreasing their length (L) and width (W).

REFERENCES:
patent: 3213382 (1965-10-01), Hensel
patent: 3214701 (1965-10-01), Chen et al.
patent: 3299364 (1967-01-01), Buchmiller et al.
patent: 3486123 (1969-12-01), Clauss
patent: 3676787 (1972-07-01), Clauss et al.
patent: 3753162 (1973-08-01), Chorta
patent: 3845413 (1974-10-01), Chinon et al.
patent: 3906404 (1975-09-01), Dixon
patent: 3978417 (1976-08-01), Clauss
patent: 4055810 (1977-10-01), Trowbridge
patent: 4187470 (1980-02-01), Clauss

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