Antenna device
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United States of America Patent
Stats
-
Dec 22, 1998
Grant Date -
N/A
app pub date -
Mar 30, 1993
filing date -
Apr 28, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An antenna system is made up by a main antenna and a sub antenna which is adjacent the main antenna in a direction not perpendicular to the direction of beam scan of the main antenna and which has a beam axis coincident with a beam axis of the main antenna. Antenna beams of the antenna system are scanned by a scan device. Received signals of both the antennas are subjected to a multiplication process under phase coherent condition in a phase-coherent multiplying device. A signal corresponding to a maximum frequency component in the output signal of the phase-coherent multiplying device is output by a frequency discriminating device and then subjected to a signal conversion process in a signal converting device. Information about a radio wave source only in the direction of the antenna beams is thus obtained.
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