The status of magnetostatic devices

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Abstract
Techniques under investigation to modify the dispersion and bandwidth of magnetostatic waves for device applications are Briefly reviewed. Four devices exhibiting useful characteristics are described in detail. These are a delay line with a delay against frequency variation which is linear within ± 5nS over a 1GHz bandwidth in X-band, a programmable 4-tap delay line which can generate and correlate Barker coded signals at 9GHz, a delay stabilized oscillator showing better frequency stability with temperature than YIG sphere oscillators and a signal to noise enhancer. This latter device is unique as it provides a low loss to coherent signals above a threshold power but increased losses to broadband noise or other signals below threshold.