Patent ID: 8648665

Claim:
An impedance-matching network for connecting a plurality of radio-frequency power-sources to a load, the network having an input impedance and an output impedance and the load having a load impedance, the network comprising: a plurality of radio frequency transmission-lines equal in number to the plurality of radio frequency power sources having a source impedance with each transmission-line connected to a corresponding one of each of the power sources with the transmission lines being connected to the load via a first radio frequency combiner; each transmission-line including a pair of series connected transmission line sections with each section in the pair having an electrical length of about one-twelfth of a wavelength at an operating frequency of the power-sources; and the series-connection between the transmission-line sections in one transmission line being connected to the series-connection between the transmission-line sections in at least one other transmission-line, said connection including a device having an impedance adjustable within a first predetermined range for matching one of the input and output impedance of the network to respectively one of the source impedance and the load impedance.