Odd-mode Doherty power amplifier

Qureshi, Jawad; Sneijers, W.; Gajadharsing, John

doi:10.1109/mwsym.2016.7540199

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…The λ/2 line can compensate for the otherwise strongly varying frequency-dependent impedance behavior offered to the main device [Z 2 in Fig. 6(b)] [23], [24] or [Z 4 in Fig. 6(d)].…”

Section: Dual Input Dpa Using Package Integrated Low-pass Qli Clamentioning

confidence: 99%

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

Qureshi

Acar

Pires³

et al. 2018

IEEE Trans. Microwave Theory Techn.

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Packaged integrated low-pass quasi-load insensitive (QLI) class-E matching is proposed for the realization of energyefficient wideband Doherty and outphasing transmitters. In view of this, a dedicated QLI class-E harmonic matching technique, suitable for in-package integration has been developed, optimized, and evaluated. As proof of concept, very compact, as well as easy to assemble, dual-input load-modulating transmitters have been realized. In this paper, we focus on a QLI class-E matched wideband Doherty that provides 71% peak efficiency (±3%) at 48-dBm saturated output power and 49% (±7%) efficiency at 6-dB power backoff, over a 1200-MHz frequency span (1.4-2.6 GHz), yielding 60% fractional bandwidth (BW). When tested with single-carrier long-term evolution (LTE) signals, having a 7-dB peak-to-average ratio, average efficiency remains close to 49% (±3%) for the entire 60% fractional BW. The realized demonstrator shows excellent linearizability with adjacent channel power ratio and normalized mean square error levels below −50 dBc and −36 dB, respectively, even when operated in simultaneous dual-band LTE operation.Index Terms-Doherty, dual input, harmonic matching, high efficiency, package integration, quasi-load insensitive (QLI) class-E, wideband.

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“…The λ/2 line can compensate for the otherwise strongly varying frequency-dependent impedance behavior offered to the main device [Z 2 in Fig. 6(b)] [23], [24] or [Z 4 in Fig. 6(d)].…”

Section: Dual Input Dpa Using Package Integrated Low-pass Qli Clamentioning

confidence: 99%

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

Qureshi

Acar

Pires³

et al. 2018

IEEE Trans. Microwave Theory Techn.

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A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

Makhsuci

Navidi

Sanduleanu

et al. 2023

Circuit Theory & Apps

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In this paper, functionality of the Doherty power amplifiers (DPAs) along with their design constraints such as DPA combining techniques are reviewed. This is because power amplifier (PA) is a key building block in the design of fifth generation (5G) communication systems. A significant trend is the DPA bandwidth enhancement technique, which is the subject of numerous papers in the literature. So, we will review some papers with different solutions to address DPA's bandwidth limitations. There are also different works in the literature that have focused on high-efficiency PA structure designs, which are also discussed in this paper. An excellent option for effective power combining in broadband designs is using balanced amplifiers. We have discussed load modulated balanced amplifiers (LMBA) in this paper because designing an effective PA with a wide bandwidth is crucial. We also covered some papers that have proposed techniques based on the linearization method to bring the efficiency and linearity of DPAs to a fair level. K E Y W O R D SDoherty power amplifier, energy efficiency, fifth generation (5G), linearization, peak to average power ratio (PAPR), quasi-balanced Doherty power amplifier (QB-DPA)

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Odd-mode Doherty power amplifier

Cited by 2 publications

References 8 publications

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

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