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2023, Volume 24, Issue 3

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Frontiers of Information Technology & Electronic Engineering >> 2023, Volume 24, Issue 3 doi: 10.1631/FITEE.2200250

A novel method for extending the output power back-off range of an asymmetrical Doherty power amplifier

Affiliation(s): School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China; School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; less

Received: 2022-06-07 Accepted: 2023-03-25 Available online: 2023-03-25
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Abstract

A novel method is proposed to extend the range of the . This study reveals that the OPBO range of the DPA can be extended by tuning the of the peaking stage away from infinity and changing the phase delay of the output matching network of the carrier power amplifier. Based on this theory, a large-OPBO-range high-efficiency asymmetrical DPA working band from 1.55 to 2.2 GHz (35% relative bandwidth) is designed to verify the proposed method. Experimental results show that the DPA operates from 1.6 to 2.1 GHz. The range of the measured efficiency is 42.2%–52.1% in the OPBO state and 47%–62.7% in the saturation state. The OPBO range is 11.1–13.2 dB.

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