Accession Number : AD0772111
Title : Thin-Film, Lumped-Element Circulator.
Descriptive Note : Final rept. 1 Jul-31 Dec 73,
Corporate Author : AMERICAN ELECTRONIC LABS INC COLMAR PA
Personal Author(s) : Talhelm,Donald L.
Report Date : 31 DEC 1973
Pagination or Media Count : 34
Abstract : The development of a miniature broadband UHF circulator was investigated. The basic design was evolved from Konishi's work on lumped-element circulators. Thin-film techniques were used to implement the resulting circuit design. The methods of Knerr involving a common capacitance to achieve broadband performance were implemented. The effects of ferrite saturation magnetization, ferrite thickness, crossover capacitance, common capacitance, and applied magnetic field were studied. A circulator was produced in a 3/4 inch cube format with less than 1 dB insertion loss, 10 dB isolation over 200 MHz, centered at 860 MHz. (Author)
Descriptors : *Waveguide circulators, Thin films, Ultrahigh frequency, Miniature electronic equipment, Ferrites, Broadband
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE