Highly efficient antenna system using a corrugated horn and scanning hyperbolic reflector
First Claim
1. An antenna system for producing a narrow beam of a desired cone angle with a spherical aperture phase front and a far-field beam with low sidelobes and high efficiency, said system comprising a reflector having a concave reflecting surface that is a section of a hyperboloid for reflecting a spherical expanding wave into another spherical expanding wave of an included cone angle equal to said desired cone angle of the desired narrow beam and means for illuminating said reflecting surface with a beam having a circularly symmetric spherical expanding wave of an included angle about twice the cone angle of said desired narrow beam with its phase center at a focus of said hyperbolic reflecting surface, whereby an antenna system is provided with a high beam efficiency greater than 95%.
0 Assignments
0 Petitions
Accused Products
Abstract
In a horn-reflector antenna system for producing a spherical aperture phase front, a corrugated conical horn illuminates a section of a hyperbolic reflector to produce a spherical aperture phase front which produces a far-field beam with low sidelobes and high beam efficiency. The system is insensitive to frequency and polarization changes, and is also insensitive to orientation about the axis of the conical horn for beam scanning.
-
Citations
10 Claims
- 1. An antenna system for producing a narrow beam of a desired cone angle with a spherical aperture phase front and a far-field beam with low sidelobes and high efficiency, said system comprising a reflector having a concave reflecting surface that is a section of a hyperboloid for reflecting a spherical expanding wave into another spherical expanding wave of an included cone angle equal to said desired cone angle of the desired narrow beam and means for illuminating said reflecting surface with a beam having a circularly symmetric spherical expanding wave of an included angle about twice the cone angle of said desired narrow beam with its phase center at a focus of said hyperbolic reflecting surface, whereby an antenna system is provided with a high beam efficiency greater than 95%.
- 7. A horn reflector antenna system for producing a spherical aperture phase front wave comprising a corrugated conical horn and a concave reflector that is a section of a hyperboloid having one foci at the phase center of a spherical wave radiated by said conical horn and the other foci at the desired image source of said reflector.
Specification