| 摘要 |
A reflector (8) 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 (16), covering the same region. |
