Optoelectronically switched phase shifter for radar and satellite phased array antennas
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United States of America Patent
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Aug 11, 1987
Grant Date -
N/A
app pub date -
Aug 19, 1983
filing date -
Jan 31, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention utilizes an opto-electronic matrix switch to select a set of fixed value phase shifters. Signals which are selectively phase shifted by this apparatus may be introduced into the signal path of each antenna element of a phased array antenna. In one embodiment the input signal is converted into an intensity modulated optical signal which is then split between paths of different length to provide different delays and hence different phase shifts. The matrix then selects a particular set of the phase shifted signals which are converted back to electrical signals and fed to the antenna array elements.
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