Very small aperture terminal & antenna for use therein

Details Very small aperture terminal & antenna for use therein Very small aperture terminal & antenna for use therein

1995-10-13

1998-04-28

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

Wave guide type

343781R, 343DIG2, 342372, H01Q 1914

Patent

active

057450846

ABSTRACT:
A data transmitting/receiving satellite terminal for transmitting to and receiving from a geosynchronous satellite employs an antenna having nulls in its antenna receiving pattern at a first frequency corresponding to satellites spaced at regular intervals from the satellite. In addition, a phase and amplitude compensation network adjusts a phase and amplitude of the transmitted signal to compensate for transmitting at a different frequency than for which the antenna is optimally designed. The antenna includes a main parabolic reflector, and two side parabolic reflectors offset from a plane parallel to the main parabolic reflector. Each of the reflectors uses a dual frequency feed horn to couple energy to and from the reflector to a dipole exciter to which the receiving electronics is coupled. The above terminal is particularly useful in C-Band applications.

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