Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1984-07-03
1986-09-30
Nussbaum, Marvin L.
Wave transmission lines and networks
Plural channel systems
Having branched circuits
324 80, 333142, 333147, 333186, H03H 950, H03H 970, H01P 1218
Patent
active
046149198
ABSTRACT:
A magnetostatic wave frequency analyzer apparatus utilizing forward volume waves. A single input transducer is arranged opposite a plurality of output transducers to receive the different frequencies of the generated magnetostatic forward volume wave. A geometric ground plane is positioned in the propagation path between the input transducer and the plurality of output transducers to demonstrate the propagation characteristics of magnetostatic forward volume waves (MSFVW) in the 2-6 GHz range. The waves were propagated in two inch diameter YIG La-doped films of varying thickness (20,30,40 microns). The waves were launched by the microstrip input transducers on an alumina substrate. Receiver transducers were also on the substrate, but placed approximately one inch away, in a semi-circle with 10 degrees of arc between adjacent transducers.
REFERENCES:
patent: 2455389 (1948-12-01), Soller
patent: 3727718 (1973-04-01), Whitehouse
patent: 4034288 (1977-07-01), Hartemann
patent: 4379274 (1983-04-01), Hansen
patent: 4395686 (1983-07-01), Adam
Pizzarello et al., "Magnetic Steering of Magnetostatic Waves in Epitaxial YIG Films", J. Appl. Phys., 41, 3 pp. 1016-1017, (1970).
Smith et al., "Induction Probing of Magnetostatic Delay Line Fields", IEEE Trans-Mag, vol. MAG-15, 6, 1738-1740, (Nov. 1979).
Smith et al., "Anisotropic Propagation of Magnetostatic Waves in Epitaxial YIG Films", IEEE Trans-Mag, vol. MAG-17, 6, 2967-2969, (Nov. 1981).
Nussbaum Marvin L.
Singer Donald J.
Stepanishen William
The United States of America as represented by the Secretary of
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