Patent ID: 8212428
Filing Date: 2012-07-03
Classification: H01J,H05H

Abstract:
1. A portable power supply apparatus for supplying a power to a microwave plasma generation apparatus for generating microwave plasma, comprising: an oscillation amplification unit which has an output stage connected to microwave plasma generation apparatus and which has an oscillator for supplying an amplified microwave; and a reflection power feedback unit which has an one stage connected to the microwave plasma generation apparatus to receive as a feedback a reflection power reflected from the microwave plasma generation apparatus at the time of generation of the plasma and measure a gradient of the reflection power and which has an other stage connected to the oscillation amplification unit to generate a switching control signal for adjusting the frequency of the microwave as a frequency suitable for the changed reflection power and supply the switching control signal, wherein the oscillation amplification unit comprises: a crystal oscillator which has an oscillator including an oscillation circuit for generating the microwave; a fractional PLL (Phase Locked Loop) which receives a signal oscillated by the crystal oscillator and generate a signal having a high frequency in a fractional division scheme; a power amplifier which amplifies the high-frequency signal generated by the fractional PLL up to 5 W and supplies the amplified signal to the microwave plasma generation apparatus; a driving amplifier which is disposed between an output stage of the fractional PLL and an input stage of the power amplifier to match impedance; a battery which supplies a power for generating the microwave and operating the power supply apparatus; a first regulator which adjusts the voltage supplied from the battery to be a stable constant voltage and supplies the constant voltage to the crystal oscillator and the fractional PLL; and a second regulator which adjusts the voltage supplied from the battery to be a stable constant voltage and supplies the constant voltage to the power amplifier and the driving amplifier.