Very small aperture terminal & antenna for use therein
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United States of America Patent
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-
Apr 28, 1998
Issued Date -
N/A
app pub date -
Oct 13, 1995
filing date -
Jun 17, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
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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