Electromagnet for programmable microwave circulator

Details Electromagnet for programmable microwave circulator Electromagnet for programmable microwave circulator

1984-06-01

1987-07-21

Tubbesing, T. H.

Wave transmission lines and networks

Attenuators

333 11, 333 241, 333158, 336219, H01P 118, H01P 122, H01F 2734

Patent

active

046821260

ABSTRACT:
A "Spacercore" design is used to provide the cores of the electromagnets which are used to bias ferrite slabs in phase shifters of a high power RF attenuator. The phase shifters require a given flux to provide a phase shift from zero to 90.degree.. With laminations of high permeability silicon steel, the core weight may be substantially reduced by including a filler comprising spacers of non-magnetic material (such as lightweight transformer pressboard. With 14-mil silicon steel laminations and 64-mil spacers, this construction provides a core which weighs 25 percent of a full ferrite core for the same flux density.

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patent: 4265682 (1981-05-01), Tsuya et al.
patent: 4427462 (1984-01-01), Senro et al.

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