基于低通滤波匹配网络的双频功率放大器设计

Design of Dual-Band Power Amplifier Based on Low-Pass Filtering Matching Network

提出了一种基于低通滤波匹配网络的高效率并发双频功率放大器设计方法。将连续F类与连续逆F类功放模式相结合,在保证效率的前提下拓展了阻抗设计空间,同时在谐波范围内引入多个传输零点,完成低通滤波匹配网络的设计,对谐波进行抑制。为验证设计方法的合理性,设计制造了一款工作于1.6 GHz与2.4 GHz且带宽超过200 MHz的并发高效率功率放大器,在两频带内具有超过66%的功率附加效率以及超过40 dBm的输出功率,其相邻信道泄漏比也优于-25 dBc。

This paper proposes a high-efficiency concurrent dual-band power amplifier(PA)design method based on a low-pass filtering matching network.By combining continuous class-F(CCF)and continuous class-F^(-1)(CCF^(-1))modes,the impedance design space is expanded under the premise of ensuring efficiency.Multiple transmission zero points are introduced in the harmonic range to complete the design of the low-pass response matching network and perform harmonic suppression.In order to verify the correctness of design method,a concurrent high-efficiency PA working at 1.6 GHz and 2.4 GHz with a bandwidth of more than 200 MHz is designed,which has a power added efficiency(PAE)of more than 66%and an output power of more than 40 dBm.The Adjacent Channel Leakage Ratio(ACLR)is better than-25 dBc.