Magnetostatic wave delay line having improved group delay linear

Details Magnetostatic wave delay line having improved group delay linear Magnetostatic wave delay line having improved group delay linear

1981-09-25

1983-08-23

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic bulk wave propagation means

333145, 333147, H03H 930, H03H 9125

Patent

active

044006691

ABSTRACT:
The linearity of group delay versus frequency in magnetostatic wave delay lines is improved by a linear variation of one of three discrete parameters in the region between the two delay line transducers. The parameter variation is applied to magnetostatic wave delay lines that have a ground plane, a magnetic garnet crystal film substrate that is spaced from the ground plane and has transmitting and receiving transducers engaged to it, and a magnetic bias field. The discrete parameters varied are the magnetic bias field; the distance of the substrate from the ground plane; and the thickness of the substrate. Appropriate linear variations of any one of the these parameters provides improved linearity of group delay versus frequency.

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patent: 3895324 (1975-07-01), Morgenthaler
patent: 3935550 (1976-01-01), Adam et al.
patent: 4199737 (1980-04-01), Patterson et al.

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