Method and system for matching radio frequency impedance

The invention discloses a method for realizing radiofrequency impedance match, and a radiofrequency impedance matching system, which includes the following steps: comparing the input admittance of the matching network with the output admittance of the radio source, adjusting the input admittance of the matching network according to the compared result, thereby realizing the impedance matching control. The impedance tester tests the input admittance of the matching network, and the controller uses the difference of the real component and the imaginary component of the admittance to control the adjustment of the tuned cell, and uses the special relationship between the real/imaginary component of the input admittance of the matching network and the tuned cell. The tuned cell of the series branch does not influenced by the parallel branch tuned cell, and can be adjusted separately. The system impedance can be realized by the decoupling control arithmetic. The invention has the advantages of simple arithmetic, rapid matching process and reliable matching system, and can be realized easily.