Magnetostatic Wave Delay Line Having Improved Group Delay Linearity.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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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 plane, a magnetic garnet crystal film substrate that is spaced from the ground plane 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. Appropriate linear variations of any one of the these parameters provides improved linearity of grouped delay versus frequency.
- Line, Surface and Bulk Acoustic Wave Devices
- Electricity and Magnetism