Tuned perturbation cone feed for reflector antenna
First Claim
1. 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.
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Accused Products
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.
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Citations
22 Claims
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1. A sub-reflector assembly for a reflector antenna with a waveguide supported sub-reflector, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for forming a sub-reflector for a deep dish reflector antenna, comprising the steps of:
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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. - View Dependent Claims (13, 14, 15, 16)
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17. A sub-reflector assembly for a reflector antenna, comprising:
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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. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification