Microminiature electrical delay line utilizing thin film inducto

Details Microminiature electrical delay line utilizing thin film inducto Microminiature electrical delay line utilizing thin film inducto

1977-11-14

1979-05-01

Smith, Alfred E.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

333 23, 333204, H03H 730, H03H 718, H01F 2730, H01F 2724

Patent

active

041526791

ABSTRACT:
A microminiature electrical delay line utilizes an m-derived filter formed by depositing a film of permalloy or other high permeability metal on a quartz or other dielectric substrate, then depositing a layer of quartz or other dielectric over the permalloy film, after which a plurality of microminiature thin film inductance coils are deposited on the dielectric layer and joined together electrically in series, a top layer of quartz or other dielectric then is deposited over the interconnected coils and a strip of permalloy or other high permeability metal is deposited over the top dielectric layer to extend across the coils, a gap being provided in the strip of permalloy at the central axis of each coil.

REFERENCES:
patent: 2847648 (1958-08-01), Wendolkowski et al.
patent: 3436687 (1969-04-01), Andrews, Jr. et al.
patent: 3585535 (1971-06-01), Senf
patent: 3634785 (1972-01-01), Kameya
patent: 3785046 (1974-01-01), Jennings
patent: 3798059 (1974-03-01), Astle et al.

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