| 摘要 |
A reflector antenna adapted for use with a mobile platform, in particular with an aircraft. The reflector antenna includes an antenna aperture, a first signal processing subsystem located closely adjacent the antenna aperture exteriorly of the mobile platform, a two channel coaxial rotary joint for allowing rotation of the antenna aperture about an azimuthal axis, and a second antenna signal processing subsystem located within the interior of the mobile platform. A feedhorn of the antenna aperture is disposed within an opening at a coaxial center of a main reflector to allow a longer length feedhorn to be employed without physically interfering with a subreflector of the antenna aperture. The first antenna signal processing subsystem includes separate channels for processing vertically polarized RF energy and horizontally polarized RF energy. The second antenna signal processing subsystem includes a transmit subsystem for amplifying and phase shifting transmit signals being sent to the antenna aperture for transmission, and a receive subsystem for processing received RF signals to provide right hand circularly polarized and left hand circularly polarized signals.
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