Accession Number : AD0277396

Title :   HIGH POWER CIRCULATOR DEVELOPMENT

Corporate Author : MERRIMAC RESEARCH AND DEVELOPMENT INC IRVINGTON N J

Report Date : 25 JUN 1962

Pagination or Media Count : 1

Abstract : Design was concluded and tests were made at low power on a 3000 mc 10% bandwidth waveguide circulator. Experimental results corresponded essentially to analysis and tests were instituted at 400 kw and 1.2 mw peak powers corresponding to average values of 312 watts and 4750 watts respectively. High power effects were manifested through apparent change of ferrite magnetization and temperature rise in the ferrite slab. A combination of modification of the ferrite crosssection to effect better heat transfer and a reduction of magnetic field to offset change of demagnetization restored the circulator to effective operation. Typical operation taken at 2900 mc and at the higher power shows a transmitter to antenna loss of .5 db and an antenna to receiver loss of 1 db. A ferrite temperature of less than 246 C was recorded at equilibrium with no attempt made to transfer heat from the waveguide. (Author)

Descriptors :   *TRANSMISSION LINES, *WAVEGUIDES, FERRITES, FERROMAGNETIC MATERIALS, RADAR DUPLEXERS, S BAND, WAVEGUIDE COUPLERS

Distribution Statement : APPROVED FOR PUBLIC RELEASE