A Bandwidth Enhanced Doherty Power Amplifier with a Compact Output Combiner

Shichang Chen; Gaofeng Wang; Zhiqun Cheng; Quan Xue

doi:10.1109/LMWC.2016.2558108

Author(s)

Shichang Chen
Gaofeng Wang
Zhiqun Cheng
Quan Xue

Related Research Unit(s)

City University of Hong Kong

Detail(s)

Original language	English
Article number	7465688
Pages (from-to)	434-436
Journal / Publication	IEEE Microwave and Wireless Components Letters
Volume	26
Issue number	6
Publication status	Published - 1 Jun 2016

Link(s)

DOI	DOI https://doi.org/10.1109/LMWC.2016.2558108 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84966539936&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(c7ee64bc-67ac-4ef8-bb46-cbd5fbcc5bf2).html

Abstract

This letter introduces a broadband and compact output combiner for Doherty power amplifier (DPA). A grounded quarter Wavelength λ 4) line is added to the output of the peaking amplifier, which helps to compensate for the bandwidth limiting effect that happens in the conventional combiner. Frequency response analysis indicates that stable impedance is achieved across a wide band for the carrier PA. For demonstration, a DPA prototype based on the proposed structure is implemented using two 10 W GaN HEMT transistors. At 6 dB back-off power, over 42% drain efficiency is obtained from 1.5 GHz to 2.5 GHz, accounting for 50% fractional bandwidth. In addition, a minimum of 55% drain efficiency is maintained at saturation in the same frequency band.

Research Area(s)

Broadband amplifiers, Doherty, drain efficiency, load modulation, output combiner

Citation Format(s)

[ RIS ] [ BibTeX ]

A Bandwidth Enhanced Doherty Power Amplifier with a Compact Output Combiner. / Chen, Shichang; Wang, Gaofeng; Cheng, Zhiqun et al.
In: IEEE Microwave and Wireless Components Letters, Vol. 26, No. 6, 7465688, 01.06.2016, p. 434-436.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Chen, S, Wang, G, Cheng, Z & Xue, Q 2016, 'A Bandwidth Enhanced Doherty Power Amplifier with a Compact Output Combiner', IEEE Microwave and Wireless Components Letters, vol. 26, no. 6, 7465688, pp. 434-436. https://doi.org/10.1109/LMWC.2016.2558108

Chen, S., Wang, G., Cheng, Z., & Xue, Q. (2016). A Bandwidth Enhanced Doherty Power Amplifier with a Compact Output Combiner. IEEE Microwave and Wireless Components Letters, 26(6), 434-436. Article 7465688. https://doi.org/10.1109/LMWC.2016.2558108

Chen S, Wang G, Cheng Z, Xue Q. A Bandwidth Enhanced Doherty Power Amplifier with a Compact Output Combiner. IEEE Microwave and Wireless Components Letters. 2016 Jun 1;26(6):434-436. 7465688. doi: 10.1109/LMWC.2016.2558108

Chen, Shichang ; Wang, Gaofeng ; Cheng, Zhiqun et al. / A Bandwidth Enhanced Doherty Power Amplifier with a Compact Output Combiner. In: IEEE Microwave and Wireless Components Letters. 2016 ; Vol. 26, No. 6. pp. 434-436.