Apparatus and method for detecting radio frequency transmission power levels
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United States of America Patent
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May 5, 2009
Grant Date -
Oct 13, 2005
app pub date -
Jun 15, 2004
filing date -
Apr 8, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for detecting radio frequency transmit power levels produced by a power amplifier of a wireless device is described. In one exemplary apparatus implementation, the apparatus includes a power amplifier, an antenna switch and a power amplifier detector. The power amplifier is configured to amplify a transmit signal at a desired power level. An antenna switch, is located between the power amplifier and an antenna, and is configured to switch the antenna from a receive mode to a transmit mode and vice versa. A power amplifier detector is connected to the antenna switch. The power amplifier detector is configured to receive a leakage signal from the antenna switch as a basis to detect the power level of the transmit signal.
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