Low sidelobe reflector antenna with shield
First Claim
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1. A front feed reflector antenna, comprising:
- a dish reflector with a focal point;
a wave guide coupled to a proximal end of the dish reflector, projecting into the dish reflector along a longitudinal axis;
a dielectric block coupled to a distal end of the waveguide;
a sub-reflector coupled to a distal end of the dielectric block proximate the focal point; and
a generally cylindrical shield coupled to a periphery of the dish reflector;
wherein a subtended angle between the longitudinal axis and a line between the focal point and a distal periphery of the shield is 50 degrees or less.
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Abstract
A front feed reflector antenna with a dish reflector has a wave guide is coupled to a proximal end of the dish reflector, projecting into the dish reflector along a longitudinal axis. A dielectric block may be coupled to a distal end of the waveguide and a sub-reflector coupled to a distal end of the dielectric block. A shield is coupled to the periphery of the dish reflector. A subtended angle between the longitudinal axis and a line between the focal point and a distal periphery of the shield is 50 degrees or less.
214 Citations
20 Claims
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1. A front feed reflector antenna, comprising:
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a dish reflector with a focal point; a wave guide coupled to a proximal end of the dish reflector, projecting into the dish reflector along a longitudinal axis; a dielectric block coupled to a distal end of the waveguide; a sub-reflector coupled to a distal end of the dielectric block proximate the focal point; and a generally cylindrical shield coupled to a periphery of the dish reflector; wherein a subtended angle between the longitudinal axis and a line between the focal point and a distal periphery of the shield is 50 degrees or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for manufacturing a front feed reflector antenna, comprising the steps of:
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coupling a wave guide to a proximal end of a dish reflector; coupling a dielectric block to a distal end of the waveguide, a sub-reflector coupled to a distal end of the dielectric block; and coupling a generally cylindrical shield coupled to the periphery of the dish reflector; wherein a subtended angle, along the longitudinal axis, between the focal point and a distal periphery of the shield is 50 degrees or less . - View Dependent Claims (18)
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19. A front feed reflector antenna, comprising:
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a dish reflector with a focal point; a generally cylindrical shield coupled to a periphery of the dish reflector; wherein a subtended angle between the longitudinal axis and a line between the focal point and a distal periphery of the shield is 50 degrees or less. - View Dependent Claims (20)
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Specification