Design strategy for tri-band Doherty power amplifier

Rawat, Karun; Gowrish, B.; Ajmera, Girish; Kalyan, Robin; Basu, Ananjan; Koul, Shiban K.; Ghannouchi, Fadhel M.

doi:10.1109/wamicon.2014.6857788

Cited by 9 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the dual-band DPA, there are researches which focus on tri-and quad-band DPA [56][57][58][59][60]. A design approach was used in [58] to cover three frequency bands.…”

Section: Tri-band and Quad-band Dpamentioning

confidence: 99%

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

Abdulkhaleq

Yahya

McEwan³

et al. 2019

Electronics

View full text Add to dashboard Cite

Power amplifiers in modern and future communications should be able to handle different modulation standards at different frequency bands, and in addition, to be compatible with the previous generations. This paper reviews the recent design techniques that have been used to operate dual-band amplifiers and in particular the Doherty amplifiers. Special attention is focused on the design methodologies used for power splitters, phase compensation networks, impedance inverter networks and impedance transformer networks of such power amplifier. The most important materials of the dual-band Doherty amplifier are highlighted and surveyed. The main problems and challenges covering dual-band design concepts are presented and discussed. In addition, improvement techniques to enhance such operations are also exploited. The study shows that the transistor parasitic has a great impact in the design of a dual-band amplifier, and reduction of the transforming ratio of the inverter simplifies the dual-band design. The offset line can be functionally replaced by a Π-network in dual-band design rather than T-network.

show abstract

“…In addition to the dual-band DPA, there are researches which focus on tri-and quad-band DPA [56][57][58][59][60]. A design approach was used in [58] to cover three frequency bands.…”

Section: Tri-band and Quad-band Dpamentioning

confidence: 99%

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

Abdulkhaleq

Yahya

McEwan³

et al. 2019

Electronics

View full text Add to dashboard Cite

show abstract

“…The Doherty power amplifier (DPA), which was proposed by W. H. Doherty in 1936 [1], is an interesting approach to high efficiency. With the development of multi-band components [2]- [8], concurrent multi-band DPAs [9]- [11] have been made realizable. Recently, a multi-band DPA (MB-DPA) with multiband impedance inverter network (MB-IIN) was proposed [12].…”

Section: Introductionmentioning

confidence: 99%

A Quad-Band Doherty Power Amplifier Based on T-Section Coupled Lines

Helaoui

Ghannouchi

et al. 2016

IEEE Microw. Wireless Compon. Lett.

View full text Add to dashboard Cite

This letter proposes a new design technique for quad-band Doherty power amplifier (DPA) based on the T-section coupled lines network (TCLN). The TCLN allows for the design of a quad-band impedance inverter at three arbitrary frequencies and one associated frequency offering more flexibility in the design of quad-band DPAs than the state of the art. The ratio of the largest operating frequency to the smallest operating frequency is found in the range 1.95 to 7, as the ratio of the other two operating frequencies is located in the range of 1.3 to 2.76. A quad-band DPA is implemented with TCLN, operating at 0.73, 1.65, 2.67, and 3.57GHz. The measured results agree with the anticipation perfectly.

show abstract

“…Recently, few works have been reported on tri-band and/or quad-band DPAs [14,15]. The major limitation of the work reported in [14] is its applicability to fixed frequency ratios.…”

Section: Introductionmentioning

confidence: 99%

Design strategy of concurrent multi‐band Doherty power amplifier

Kalyan

Rawat

Koul

2015

IET Microwaves, Antennas & Propagation

Self Cite

View full text Add to dashboard Cite

This paper proposes design methodologies of concurrent multi‐band Doherty power amplifiers (PAs) based on multi‐band impedance inverting networks and multi‐band phase offset lines (POLs). Design procedures for implementing such multi‐band impedance inverting networks and multi‐band POLs at arbitrary frequencies are presented here. For validating the design procedures, tri/quad‐band Doherty PAs are designed, fabricated and tested using continuous wave (CW) and modulated signals in discrete mode and concurrent mode. The tri‐band Doherty power amplifier (DPA) is implemented at 1600, 1900 and 2200 MHz. CW signal measurement of tri‐band DPA shows an efficiency of 46%, 40% and 42%, respectively, around 6 dB output power back‐off (OPBO). The quad‐band DPA is implemented at 1600, 1960, 2140 and 2350 MHz. Measured results using CW signal shows an efficiency of 40%, 37%, 30% and 31%, respectively, around 6 dB OPBO.

show abstract

Design strategy for tri-band Doherty power amplifier

Cited by 9 publications

References 8 publications

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

Recent Developments of Dual-Band Doherty Power Amplifiers for Upcoming Mobile Communications Systems

A Quad-Band Doherty Power Amplifier Based on T-Section Coupled Lines

Design strategy of concurrent multi‐band Doherty power amplifier

Contact Info

Product

Resources

About