Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1995-09-12
1996-12-24
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
H01Q 300
Patent
active
055877176
ABSTRACT:
An apparatus and a method for manually aligning an antenna of a very small aperture terminal with a satellite. The apparatus comprises a manual antenna alignment circuit connected between a demodulator and a data processor in a receiver. The manual antenna alignment circuit includes a peak value detection circuit for filtering and differentiating an output signal from the demodulator to detect a peak value therefrom, a sample/holder for sampling and holding an output signal from the peak value detection circuit, an inverter for inverting a multiplexing control signal, a first analog switch for selectively transferring an output signal from the sample/holder in an antenna alignment mode in response to an output signal from the inverter, a second analog switch for selectively transferring an output signal from an automatic gain control circuit in the receiver in a normal mode in response to the multiplexing control signal, a scaling circuit for scaling the signal transferred by the first analog switch or the signal transferred by the second switch at a desired ratio, a display circuit for displaying a level of an output signal from the scaling circuit so that it can be observed by the user with the naked eye, and an antenna alignment mode switch for selecting the antenna alignment mode.
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patent: 4796032 (1989-01-01), Sakurai et al.
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Blum Theodore M.
Hyundai Electronics Industries Co,. Ltd.
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