Accession Number : AD0762517
Title : Tactical Multi-Tuned Preselector.
Descriptive Note : Final technical rept. 20 Sep 71-20 Dec 72,
Corporate Author : WATKINS-JOHNSON CO PALO ALTO CALIF
Personal Author(s) : Tokheim,Robert E.
Report Date : APR 1973
Pagination or Media Count : 152
Abstract : 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)
Descriptors : (*CHANNEL SELECTORS, RADIO RECEIVERS), TUNING DEVICES, FERRATES, GARNET, ELECTRIC FILTERS, YTTRIUM COMPOUNDS
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE