Broadband Power Amplifier Design Method Based on SIR and Multi-Frequency Point Matching.

A broadband power amplifier (PA) design is based on a stepped impedance resonator (SIR). Compared with an open circuit microstrip line resonator, the SIR has a better frequency response. Precise harmonic control of the open microstrip line and the SIR matching circuit has the potential for broadband harmonic suppression as well. A multi-frequency method with four frequency points is used to design the matching structure to improve power and bandwidth performance. A broadband high efficiency 1 to 3.8 GHz PA designed using this method yields an output power of 39.7 to 41 dBm with a gain of 9.7 to 11 dB and efficiency greater than 60 percent. [ABSTRACT FROM AUTHOR]