A 700-W peak ultra-wideband broadcast Doherty amplifier

Qureshi, Jawad; Sneijers, W.; Keenan, R.K.; deVreede, L. C. N.; Rijs, F. van

doi:10.1109/mwsym.2014.6848495

Cited by 61 publications

(18 citation statements)

References 5 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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“…Amplifiers (DP A) with extended bandwidth, most of them are either complex, requiring dual supply voltage [2] or input drive conditioning [3], either limited to medium power (lower than 100W) [1 ]- [6], or sub-GHz applications [7].…”

Section: Although Recent Publications Have Proposed Doherty Powermentioning

confidence: 99%

“…Furthermore, in the case of a wideband amplifier, designing an input splitter that shift the phase by 90 degrees at the central frequency only is not sufficient to guarantee a good power recombination in the complete bandwidth. A criterion experimentally verified is to allow no more than +1-5 degrees input to output phase dispersion in the total band [7].…”

Section: B Input Splitter Designmentioning

confidence: 99%

A 100 W tri-band LDMOS integrated Doherty amplifier for LTE-advanced applications

Moronval¹,

Zanden

Ercoli³

2015

2015 IEEE MTT-S International Microwave Symposium

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A Doherty amplifier architecture with integrated input splitter and output combiner, allowing bandwidth extension, is described. Based on this approach, a very compact 100W symmetrical LDMOS Doherty amplifier has been designed and characterized in the 1.805 to 2.17 GHz frequency band. It can achieve 15.9 dB maximum gain, 46 to 48 % back-off efficiency and can be linearized at -59.3 dBc ACPR level with a 10 MHz wide LTE signal. The fabricated amplifier is 50 x 50 mm 2 •

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“…In the past few years, sorts of efficiency-boosting PA solutions such as envelop tracking [1], outphasing [2], and Doherty [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] have been reported to fight against efficiency reduction caused by high PAPR signals. Among them, the Doherty PA is considered as one of the best candidates, because it is simple in structure and easy for implementation.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, some efforts on modifying the load modulation networks (LMN) have achieved substantial improvements. However, most of them are still complicated in structures and are mainly limited to conventional two-way Doherty architecture [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A Reactance Compensated Three‐Device Doherty Power Amplifier for Bandwidth and Back‐Off Range Extension

Chen

Wang

et al. 2018

Wireless Communications and Mobile Computing

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This paper proposes a new broadband Doherty power amplifier topology with extended back-off range. A shunted /4 short line or /2 open line working as compensating reactance is introduced to the conventional load modulation network, which greatly improves its bandwidth. Underlying bandwidth extension mechanism of the proposed configuration is comprehensively analyzed. A three-device Doherty power amplifier is implemented for demonstration based on Cree's 10 W HEMTs. Measurements show that at least 41% drain efficiency is maintained from 2.0 GHz to 2.6 GHz at 8 dB back-off range. In the same operating band, saturation power is larger than 43.6 dBm and drain efficiency is higher than 53%.

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A 700-W peak ultra-wideband broadcast Doherty amplifier

Cited by 61 publications

References 5 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 100 W tri-band LDMOS integrated Doherty amplifier for LTE-advanced applications

A Reactance Compensated Three‐Device Doherty Power Amplifier for Bandwidth and Back‐Off Range Extension

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