Linear-modulation type radio transmitter
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United States of America Patent
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May 12, 1992
Grant Date -
N/A
app pub date -
Oct 19, 1990
filing date -
Nov 6, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a radio transmitter which transmits from an antenna a carrier wave linearly modulated based on a signal to be transmitted. Since a monitor wave with the predetermined level applied to a transmission power amplifier is amplified and the level of the amplified monitor wave is thereafter detected, followed by adjustment of the gain of the transmission power amplifier based on its level detected, or since the comparison between the level of an envelope component of a signal prior to modulation and that of an amplified signal is made and the gain of the transmission power amplifier is adjusted based on the result of its comparison, mean transmission power is maintained at a predetermined value.
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