Accession Number : AD0816274

Title :   INVESTIGATIONS OF BROADBAND FERROMAGNETIC POWER LIMITERS AND EXPANDERS AS DUPLEXING ELEMENTS FOR MICROWAVE SYSTEMS.

Descriptive Note : Quarterly progress rept. no. 3, 1 Dec 66-28 Feb 67,

Corporate Author : MICROWAVE ELECTRONICS PALO ALTO CA

Personal Author(s) : Young, Peter ; Olson, F. A.

Report Date : 30 JUN 1967

Pagination or Media Count : 24

Abstract : A traveling-wave limiter has been designed. A single-crystal YIG slab was placed in a dielectric-loaded waveguide, and the coupling between the waveguide mode and n=1 surface magnetostatic mode was calculated. The length of the YIG slab needed for converting electromagnetic energy into magnetostatic energy over a fairly broad frequency range was calculated. Experiments are being conducted to test the possibility of using this device as the broadband, low-level microwave limiter. The performance of an expander using a ferrite sphere inside a helix, has been evaluated. The loss inside the helix structure has been identified. (Author)

Descriptors :   *DUPLEXERS), (*LIMITERS, TRAVELING WAVE TUBES, FERROMAGNETIC MATERIALS, SINGLE CRYSTALS, YTTRIUM, IRON, GARNET, DIELECTRIC PROPERTIES, WAVEGUIDES, BROADBAND, HELIXES, RUTILE.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE