Broadband predistortion linearizer with automatic temperature compensation for microwave amplifiers
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United States of America Patent
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Nov 19, 1996
Grant Date -
N/A
app pub date -
May 5, 1995
filing date -
May 11, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A predistortion linearizer for microwave power amplifiers has a linear channel and a non-linear channel. Both channels are made up of the same units. Each channel includes a variable phase-shifter, a variable attenuator and an amplifier. Each channel can further include a fixed attenuator. The two channels are coupled at their ends by couplers each introducing a phase-shift of 90.degree. so that the total phase-shift is 180.degree.. Because the components of the two channels are the same, any variations with the frequency or the amplitude of the signal or with the operating temperature cancel out. The linearizer has applications in telecommunications and in particular in multicarrier systems.
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