Rf power amplifier protection

Details Rf power amplifier protection Rf power amplifier protection

H - Electricity

02

H

330/2

H02H 7/20 (2006.01) H03F 1/52 (2006.01) H04B 1/04 (2006.01)

Patent

CA 1290027

Abstract An RF power amplifier is operated by supplying an RF signal to the amplifier for amplification and thereby providing an output RF signal to the amplifier's output circuit which has an impedance matching output network connected in series with a load. A detector serves to detect any reflected power in the output circuit. The RF power amplifier is turned off when the detected RF power exceeds a reference level. The amplifier is protected by discontinuing the supply of the RF signal to the amplifier while it is turned off and, instead, a frequency signal is supplied to the RF amplifier having a frequency that corresponds with that of any current flowing in the output circuit.

609113

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