Tuned perturbation cone feed for reflector antenna
AssigneeAndrew Corporation
InventorChris Hills
Life of this patent
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Abstract
A sub-reflector for a dish reflector antenna with a waveguide supported sub-reflector. The sub-reflector formed from a dielectric block, concentric about a longitudinal axis. The dielectric block having a first diameter waveguide junction portion adapted for coupling to an end of the waveguide and a sub-reflector surface coated with an RF reflective material having a periphery with a second diameter larger than the first diameter. A leading cone surface extends from the waveguide junction portion to the second diameter at an angle. The sub-reflector surface and the leading cone surface having a plurality of non-periodic perturbations concentric about the longitudinal axis.
Claims22
A sub-reflector assembly for a reflector antenna with a waveguide supported sub-reflector, comprising:
- a dielectric block;
- the dielectric block having a first diameter waveguide junction portion adapted for coupling to an end of the waveguide;
- a sub-reflector surface coated with an RF reflective material having a periphery at a second diameter larger than the first diameter;
- and
- a leading cone surface extending from the waveguide junction portion to the second diameter at an angle;
- the sub-reflector surface and the leading cone surface having a plurality of non-periodic perturbations concentric about a longitudinal axis of the dielectric block.
A method for forming a sub-reflector for a deep dish reflector antenna, comprising the steps of:
- injection molding a dielectric block;
- machining the dielectric block;
- and
- coating a sub-reflector surface of the dielectric block with an RF reflective material;
- the dielectric block having a plurality of non-periodic perturbations, the perturbations selected to create a desired RF pattern distribution.
A sub-reflector assembly for a reflector antenna, comprising:
- a block of dielectric material with a waveguide junction portion adapted for insertion into a waveguide mounted proximate the vertex of the deep dish reflector;
- the dielectric block extending from the waveguide junction portion, over a leading cone surface, to a periphery of a sub-reflector surface;
- the sub-reflector surface coated with an RF reflective material;
- the leading cone surface and the sub-reflector surface having a plurality of concentric, non-periodic perturbations.
Dependencies are inferred from the claim text.