Electronic scanning antenna
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United States of America Patent
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-
Jul 20, 1999
Grant Date -
N/A
app pub date -
Mar 10, 1997
filing date -
Sep 19, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-directional network antenna includes N parallel and juxtaposed arrays of antenna elements respectively connected to electronic transmission/receiving circuits by an ultrahigh frequency connecting device with phase shifts controlled by a control device. The ultrahigh frequency connecting device comprises N transmission lines respectively associated with N arrays of antenna elements, each transmission line having outputs in propagation lengths which are staggered in relation to their input, which outputs are connected to respective antenna elements of the associated array. The ultrahigh frequency connecting device further comprises at least one electromagnetic lens with P inputs and N outputs respectively connected to N inputs of the transmission lines. The control device comprises switching elements for selecting at least one of the P inputs of the electromagnetic lens to provide scanning in one direction, and elements for causing the frequency of the signals applied to the selected input to vary, to provide scanning in a second, perpendicular direction.
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