Reflector antenna including dual band splashplate support

摘要

A reflector antenna includes a dual-band waveguide feed and a splashplate support arranged to define a space between the waveguide feed aperture and the splashplate. The dual-band waveguide feed is configured to receive an input signal in a first transmission mode, to convert a transmission mode of an upper frequency band from a first transmission mode to a mixed transmission mode including the first transmission mode and a second transmission mode. 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.

主权项

1. A reflector antenna comprising:
a dual-band waveguide feed configured to receive an input signal in a first transmission mode, where the input signal can include a plurality of frequencies arranged into upper and lower frequency bands, and the waveguide feed including a mode converter configured for converting a transmission mode of an upper frequency band from the first transmission mode to a mixed transmission mode including the first transmission mode and a second transmission mode; a reflector; a splashplate configured to direct a beam emitted from an aperture of the waveguide feed to the reflector; and a splashplate support having a first engaging portion for engaging with the waveguide feed, a second engaging portion for engaging with the 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, wherein the supporting portion has a thickness equal to substantially λ/2, where λ is a characteristic wavelength of a beam inside the supporting portion.