A new impedance-matching technique for dual-band RF circuits and antennas

Dual-band impedance-matching technique for RF circuits and antennas operating concurrently in two bands in presented. The dual-band matching technique enables simultaneous matching of two arbitrary loads to two arbitrary sources at two different frequencies, utilizing the impedance-equivalence properties of LC networks that any LC network can be equivalent to an inductor, capacitor, open or short at different frequencies. The dual-band matching technique is employed to design a dual-band power amplifier operating concurrently at 25.5 and 37 GHz with good performance.