Accession Number : ADD010894

Title :   Millimeter Wave Image Guide Band Reject Filter.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Dixon,S , Jr

Report Date : 06 Mar 1984

Pagination or Media Count : 11

Abstract : A magnetically tuned band reject filter for millimeter wave frequencies compromising a barium ferrite sphere embedded in the upper surface of a semi-insulating gallium arsenide waveguide transmission line element located on a conductive ground plane and forming thereby an image guide. A pair of high energy rare earth permanent magnets are located on the upper and lower surfaces of the waveguide element at the location of the ferrite sphere with a single tuning coil surrounding both magnets and the waveguide and operates to bias the ferrite sphere for selective absorption of signals propagating along the transmission line. With the magnetically tuned ferrite sphere located therebetween, both an input signal and a local oscillator signal for example are coupled to one end of the waveguide element while receiving electronics apparatus, such a Schottky barrier mixer, is located at the other end of the waveguide element. (Author)

Descriptors :   *Patent applications, *Bandstop filters, *Barium ferrites, *Mixers(Electronics), *Dielectric waveguides, *Gallium arsenides, Transmission lines, Millimeter waves, Local oscillators, Coils, Surfaces, Ferrites, Magnets, Surfaces, Frequency, Spheres, Signals, Waveguides, Tuning, Input

Subject Categories : Inorganic Chemistry
      Electrical and Electronic Equipment
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE