A novel analytic design method of dual‐band harmonic‐tuned power amplifiers

Abstract

In this paper, an analytic methodology for designing output‐matching network (OMN) is presented. The proposed OMN integrates harmonic control circuit and reduces the complexities of design and circuit structure. Besides, the second and third harmonics control are provided for two operated frequencies. In order to verify the method, a 1.8/2.65 GHz dual‐band high‐efficiency PA adopting a GaN HEMT is presented. Experimental results show the drain efficiencies of 76.2% and 71.6%, output power of 43 and 42.7 dBm at 1.8 and 2.65 GHz, respectively. In addition, the drain efficiency more than 65% can be maintained from 1.55‐2.0 GHz and 2.65‐2.8 GHz.

Design of a dual‐band power amplifier over an octave bandwidth employing dual‐band resonators

“…Notice that, the tunable elements will introduce additional power loss. Therefore, advanced methods for designing the passive matching networks were developed to implement high efficiency DBPAs 13–18 . In 2014, the authors proposed a synthesis method of dual‐band matching networks for designing DBPAs, and a DBPA prototype operating at 0.8 and 1.9 GHz was realized 13 .…”

“…To improve the DE of a DBPA, harmonic load impedance should be well controlled 15,19–25 . In 2018, Huang et al 15 designed a harmonic‐tuned DBPA that achieves DEs of 76.2% and 71.6% at 1.8 and 2.65 GHz, respectively.…”

“…To improve the DE of a DBPA, harmonic load impedance should be well controlled 15,19–25 . In 2018, Huang et al 15 designed a harmonic‐tuned DBPA that achieves DEs of 76.2% and 71.6% at 1.8 and 2.65 GHz, respectively. Moreover, high efficiency operation modes can be introduced to the DBPA to boost the conversion efficiency 20–25 .…”