A high frequency power amplifier for transmitter or high -frequency heating apparatus

The utility model provides a high frequency power amplifier for transmitter or high -frequency heating apparatus, includes: transistor, high -frequency transformer, resonant capacitor, bypass capacitor and DC power supply, wherein: transistor's emitter ground is the negative pole of power, alternating current signal source and a DC bias power has concatenated between transistor's base and ground, and this DC bias both ends of the power supply connects in parallel has couple bypass capacitor of alternating current signal short circuit, the elementary of high -frequency transformer and collecting electrode DC power supply concatenate between transistor's collecting electrode and ground, there is a resonant capacitor in that high -frequency transformer primary both ends are parallelly connected, there is a bypass capacitor in that collecting electrode DC power supply both ends are also parallelly connected, high -frequency transformer's the secondary signal output part that is, it has load resistance still to connect in parallel in these secondary coil both ends. This amplifier simple structure, transistor does not switch on when no signal input, and because of the output is connected with resonant capacitor and step up transformer, consequently the consumption is little at ordinary times, and output is big.