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