Circuit including a phase shifter for generating signals for electronically scanned antennas
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United States of America Patent
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Oct 4, 1994
Grant Date -
N/A
app pub date -
May 5, 1993
filing date -
May 5, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit generates RF signals for electronically scanned antennas and in particular for TACAN systems. The circuit includes a phase shifter that is particularly suitable for use in generating these RF signals. Instead of using circuits including a large Butler-matrix, a small Butler-matrix having only a few outputs is used for combining a limited number of outputs of a power divider. By further combining the remaining outputs of the power divider with the few outputs of the Butler-matrix by the use of electromagnetic combiners, a plurality of RF signals that are suitable for use by electronically scanned antennas are obtained from the circuit which is comparatively simple in structure yet produces very accurately controlled RF signals.
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