Work

Design of a broadband high-efficiency class-GF power amplifier using a two-stage branch line directional coupler

Year: 2025

Type: article

Abstract: This paper proposes an extended technique to design broadband high-efficiency power amplifiers (PAs), in which the proposed extended design strategy integrates the theory of extended continuous mode PAs with an innovative approach for implementing circuits that meet the required theoretical impedances. The method uses impedance frequency modulation and is implemented by a two-stage branch line directional coupler with adjustable terminals. To illustrate the design procedure, a broadband high-efficiency PA operating in 0.7-3.0 GHz is designed and then fabricated by using a CGH40010F transistor. The test results show that the PA achieves an output power ranging from 40.1 to 42.8 dBm and a drain efficiency (DE) ranging from 60.8% to 75.0%. Additionally, the gain ranges from 10.1 to 12.5 dB within the target band. The realized PA exhibits an extremely competitive relative bandwidth of 124.3%.

Source: IEICE Electronics Express

DOI: 10.1587/elex.22.20250080

Authors: Zhenhang Zhang, Zhiwei Zhang, Luyu Zhang, Chenlu Wang

Institutions: State Key Laboratory of Millimeter Waves, Hangzhou Dianzi University

Language: English

Topic: Advanced Power Amplifier Design

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, Natural Science Foundation of Zhejiang Province

Award: G535461927