Accession Number : AD0700957

Title :   HIGH-POWER, FOUR-PORT, JUNCTION CIRCULATOR.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : True,Robert M. ; DeCamp,Edward E. , Jr

Report Date : JAN 1970

Pagination or Media Count : 30

Abstract : The feasibility of a symmetrical, high-power, four-port, waveguide, junction circulator for operation at S band was demonstrated. Both H-plane and E-plane configurations were studied. The ferrites utilized in the circulators were polycrystalline yttrium-iron-garnet (YIG) materials doped with gadolinium (Gd), aluminum (Al), and dysporosium (Dy) in various combinations. In addition, various loading techniques and metallic center posts were evaluated. Single- and double-disk geometries were used with a magnetizing field applied along the ferrite axis in each design. The H-plane configuration has an insertion loss slightly above 1.0 dB, is power-limited at approximately 600 kW peak, 600 watts average, is physically larger than the E-plane design, and requires a comparatively large biasing field. The E-plane configuration can handle a greater amount of power, is lighter and more compact, operates with a lower biasing field, and the insertion loss is approximately 0.5 dB. High-power operation at 1.0 MW peak, 1.0 kW average was achieved. (Author)

Descriptors :   (*WAVEGUIDE CIRCULATORS, S BAND), (*RADAR DUPLEXERS, WAVEGUIDE CIRCULATORS), MICROWAVE EQUIPMENT, FERRITES, GARNET, RADIOFREQUENCY POWER

Subject Categories : Electrical and Electronic Equipment
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE