Stepped radio frequency reflector antenna

摘要

Stepped radio frequency (RF) reflector antennas are disclosed in which an inner RF reflector is disposed in a central opening of at one or more annular RF reflectors. The RF reflecting surface of the inner RF reflector and the RF reflecting surface(s) of the one or more annular RF reflectors can be shaped and positioned relative to each other to have different focal lengths but nevertheless reflect an RF signal to the same focal plane. The depth of the inventive reflector antenna system can be less than the depth of prior art reflector antennas with a comparable RF aperture.

主权项

1. A radio frequency (RF) reflector antenna system comprising:
an inner RF reflector antenna comprising an RF reflecting surface having a first focal length to a focal plane; one or more annular RF reflector antennas each comprising an annular RF reflecting surface having a focal length to said focal plane,
wherein:
said inner reflector is disposed in a central opening of a first one of said one or more annular reflector antennas,said first annular reflector antenna having a first annular RF reflecting surface and a second focal length to said focal plane,said first focal length is different than said second focal length, andan outer edge of said first annular RF reflecting surface is closer to said focal plane than an outer edge of said RF reflecting surface of said inner RF reflector antenna,said reflecting surface of said inner RF reflector antenna is shaped to reflect an RF signal to a focal area on said focal plane, andsaid first annular reflecting surface is shaped to reflect said RF signal to said focal area on said focal plane; and a secondary reflector antenna comprising said focal area, said secondary reflector antenna spaced from said inner reflector antenna and said first annular reflector antenna; and supports attaching said secondary reflector antenna to said annular RF reflecting surface of one of said one or more annular antennas at an RF shadow region of said annular RF reflecting surface.