Reflector
OwnerDavid Robson, Simon John Stirlandinventors
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Abstract
A reflector for a reflector antenna is provided for producing a far field pattern with near-zero field strength at a predetermined position, the reflector having a surface comprising a stepped profile for generating the near-zero field strength. The stepped profile may comprise a radial step. The location of the near-zero field strength can be steered by moving the reflector only or by adjusting the amplitude and phase of an additional low resolution beam, produced by, for example, a simple horn, covering the same region.
Claims14
A reflector for a reflector antenna for producing a far field pattern with near-zero field strength at a predetermined position, the reflector having a surface comprising a stepped profile for generating the near-zero field strength.
A reflector antenna comprising a feed and at least one reflector, the at least one reflector having a surface which comprises a step such that the depth along the surface around the centre of the reflector increases to create a one wavelength variation in optical path length around the antenna aperture for producing zero directivity at a predetermined position in the far field of the antenna.
Dependencies are inferred from the claim text.