Dual-Band Dual-Output Doherty Power Amplifier for Unsynchronized Time-Division Duplexing
Artikel i vetenskaplig tidskrift, 2023

Conventional multiband power amplifiers (PAs), when working in time-division duplex (TDD), require the transmit–receive intervals of all bands to be synchronized. This is an undesirable constraint in modern radio base stations. This article proposes a dual-output dual-band Doherty PA (DB-DPA) that enables the loading of one band to be switched on-and-off without impacting the other band in normal transmission. A thorough analysis of the proposed dual-output DB-DPA architecture is presented, and a dual-output DB-DPA prototype operating at 1.4 and 2.6GHz has been designed as a proof of concept. The large-signal measurements of the prototype DB-DPA indicate Doherty behavior at both frequencies with over 56% saturation efficiency and 45% efficiency at 6-dB power back-off (PBO). Furthermore, single-band and concurrent dual-band linearized modulated measurements, using 10-MHz new radio (NR) signals with 6-dB peak-to-average power ratio (PAPR), demonstrate the linearizability of the proposed DB-DPA and its usefulness for unsynchronized TDD applications.


dual output

energy efficiency


power amplifier (PA)

dual band


Paul Saad

Ericsson AB

Yonghai Jin

Ericsson AB

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Rui Hou

Ericsson AB

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN) 15579670 (eISSN)

Vol. 71 11 4826-4840





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