Axisymmetric reflector antenna for radiating axisymmetric modes
A reflector antenna system includes: a concave primary reflector, the concave primary reflector adapted to be illuminated by a sub-reflector and radiate accordingly an axisymmetric beam; a coherent-phase sub-reflector disposed one in front of the primary reflector; and a feed adapted to operate with the TE 01 axisymmetric mode and illuminating the said sub-reflector by employment of such. the aperture of the feed disposed to crowd the sub-reflector.
1. A reflector antenna system comprising:
a concave primary reflector, the concave primary reflector adapted to be illuminated by and radiate an axisymmetrical aperture distribution beam;
a coherent-phase sub-reflector disposed in front of the primary reflector, wherein the coherent-phase sub-reflector is disposed within one operational wavelength from the primary reflector; and
a feed adapted to operate with an TE 01 axisymmetric mode and illuminating the said sub-reflector by employment of such, an aperture of the feed disposed to crowd the sub-reflector.
2. The reflector antenna system as recited in claim 1 wherein the sub-reflector comprises a Cassegrain sub-reflector.
3. The reflector antenna system as recited in claim 1 wherein the sub-reflector comprises a Gregorian sub-reflector.
4. The reflector antenna system as recited in claim 1 wherein the feed is adapted to provide a symmetry axis azimuthally invariant electromagnetic field distribution illumination of the sub-reflector.
5. The reflector antenna system as recited in claim 1 wherein the primary reflector is adapted to be illuminated by the sub-reflector and radiate accordingly a symmetry axis azimuthally invariant electromagnetic field distribution beam.
6. A method of providing a reflector antenna comprising:
concave primary reflector, the concave primary reflector adapted to be illuminated by and radiate an axisymmetrical aperture distribution beam;
providing a coherent-phase sub-reflector disposed in front of the primary reflector, wherein the coherent-phase sub-reflector is disposed within one operational wavelength from the primary reflector; and
providing a feed adapted to operate with an TE 01 axisymmetric mode and illuminating the said sub-reflector by employment of such, an aperture of the feed disposed to crowd the sub-reflector.
7. The method as recited in claim 6 wherein the sub-reflector comprises a Cassegrain sub-reflector.
8. The method as recited in claim 6 wherein the sub-reflector comprises a Gregorian sub-reflector.
9. The method as recited in claim 6 wherein the feed is adapted to provide a symmetry axis azimuthally invariant electromagnetic field distribution illumination of the sub-reflector.
10. The method as recited in claim 6 wherein the primary reflector is adapted to be illuminated by the sub-reflector and radiate accordingly a symmetry axis azimuthally invariant electromagnetic field distribution beam.
11. A reflector antenna system comprising:
a concave primary reflector, the concave primary reflector adapted to be illuminated by and radiate an axisymmetrical aperture distribution beam;
a coherent-phase sub-reflector disposed in front of the primary reflector, wherein the coherent-phase sub-reflector is disposed within a half of an operational wavelength from the primary reflector; and
a feed adapted to operate with an TE 01 axisymmetric mode and illuminating the said sub-reflector by employment of such, an aperture of the feed disposed to crowd the sub-reflector.
12. A method of providing a reflector antenna comprising:
concave primary reflector, the concave primary reflector adapted to be illuminated by and radiate an axisymmetrical aperture distribution beam;
providing a coherent-phase sub-reflector disposed in front of the primary reflector, wherein the coherent-phase sub-reflector is disposed within a half of an operational wavelength from the primary reflector; and
providing a feed adapted to operate with an TE 01 axisymmetric mode and illuminating the said sub-reflector by employment of such, an aperture of the feed disposed to crowd the sub-reflector.