Tactical Multi-Tuned Preselector.
Final technical rept. 20 Sep 71-20 Dec 72,
WATKINS-JOHNSON CO PALO ALTO CALIF
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A study was made primarily of nonreciprocal YIG filter preselectors for the purpose of providing a suitable front-end for frequency-selective communications receivers. It was shown that fixed-tuned miniaturized nonreciprocal YIG preselectors can be arranged in a YIG filter bank multi-channel configuration with narrow bandwidths, low insertion loss, high directivity, nanosecond switching, and frequency-hopping rates in the MHz range. Accurate mathematical models were developed for analyzing the YIG preselector and these were utilized in a computer design program for the reciprocal and tri-loop filter configurations. Feasibility of achieving bandwidths within the 0.1 to 50 MHz range with low insertion loss was demonstrated. Modified author abstract
- Electrical and Electronic Equipment
- Radio Communications