Design of dual-frequency high-efficiency power amplifier with two adjustable transmission zeros
In order to solve the problem that the dual-frequency power amplifier in the multi-frequency wire-less terminals easily interferes with other terminals in the mine,a design method of dual-frequency high-efficiency power amplifier with two adjustable transmission zeros is proposed.All the design parameters of the dual-frequen-cy impedance conversion circuit are obtained by analytical calculation,and at the same time,all the transmission line characteristic impedance parameters can be adjusted to the appropriate range by adjusting two free variables.In addition,the second harmonic control circuit and two transmission-zero generating circuits are fused into the dual-frequency fundamental wave impedance conversion circuit.Simulation results show that the maximum pow-er additional efficiency at 0.7 GHz and 2.6 GHz is 81.0%and 71.5%,and that when the input power is 25.5 dBm and 29.5 dBm,respectively,the corresponding output power at 0.9 GHz and 2.1 GHz is only-0.9 dBm and-22.9 dBm,respectively,thus verifying the validity of the design method in this paper.
dual-frequency impedance conversion circuittransmission zerohigh-efficiency power amplifier
万方数据
维普
