| 摘要 |
A splashplate support for a reflector antenna comprises a first engaging portion for engaging with a dual-band waveguide feed, a second engaging portion for engaging with a splashplate, and a supporting portion connecting the first engaging portion to the second engaging portion, and arranged to define a space between the waveguide feed aperture and the splashplate. The supporting portion can be spaced apart from the aperture of the waveguide feed, and may have a thickness corresponding to half a wavelength of a beam emitted from the aperture. The shape of the supporting portion may preferably correspond to a shape of the beam wavefront after it has been reflected from the splashplate. The waveguide feed may include means for converting a transmission mode of a first frequency band from a first transmission mode to a mixed transmission mode. |
