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US 4,907,010 AGranted
Directionally sensitive receiving antenna employing gyrotropic material
OwnerThomas M. B. Wrightinventor
Life of this patent
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Abstract
Antenna apparatus has two laterally spaced waveguide horns with apertures covered by layers of gyrotropic ferrite material. The layers are angled to present opposite angles of incidence to radiation from a common distant source. Electromagnets produce magnetic fields in and parallel with the ferrite layers. The relative phase or amplitude of energy received on the horns is compared to indicate the direction of the source.
Claims8
Antenna apparatus for receiving electromagnetic radiation from a distant source comprising:
- at least two spacially separate reception apertures for receiving said electromagnetic radiation from said distant source;
- at least one layer of gyrotropic material extending across each of said apertures, said layers being arranged to present angles of incidence which are of opposite sign to radiation from said distant source;
- means for generating magnetic fields in and parallel with said layers of gyrotropic material;
- and
- means for comparing a relative phase or amplitude of energy from said distant source received in each of said two apertures through said layers of gyrotropic material.
2 more elements
An antenna apparatus for receiving electromagnetic radiation from a distant source comprising:
- a parabolic reflector having an aperture which is symmetrical about two orthogonal axes and focuses said electromagnetic energy;
- means for collecting said electromagnetic energy focused by said parabolic reflector;
- a layer of a gyrotropic material which covers said aperture and is arranged to present angles of incidence which are of opposite sign to radiation from said distant source which falls on diametrically opposite parts of said aperture;
- means for generating magnetic fields in and parallel with said layer of gyrotropic material;
- and
- a means for comparing a relative phase or amplitude of energy from said distant source received by diametrically opposite parts of said aperture.
3 more elements
Dependencies are inferred from the claim text.