A High Efficiency Broadband Class-E Power Amplifier Using a Reactance Compensation Technique

Lin, Chi-Hsien; Chang, Hong-Yeh

doi:10.1109/lmwc.2010.2056675

Cited by 28 publications

(8 citation statements)

References 14 publications

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“…This exploration has led to the conclusion that a power amplifier of parallel-circuit Class E operation combining reactance compensation technique, with harmonic suppression circuit is a very attractive, simple and yet practical solution for improving efficiency and harmonic suppression of power amplifier over wide frequency range. [12] E/D-PHEMT 1500-3800 0.5 >62 NA [13] GaAs MESFET 2400 0.25 64 50 [14] GaN HEMT 1700-2700 0.8 55 NA [15] CMOS 140-170 2.5 >62 NA…”

Section: Resultsmentioning

confidence: 99%

Optimised high‐efficiency Class E radio frequency power amplifier for wide bandwidth and high harmonics suppression

Kumar¹,

YewKok²

2014

IET Circuits, Devices & Systems

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A Class E power amplifier offers high efficiency approaching 100% for an ideal case. A new wide bandwidth Class E power amplifier design has been introduced combining a parallel-circuit load network with reactance compensation technique and high-order harmonic suppression circuit. The proposed topology has been discussed based on theory and its experimental verification. A hardware prototype was designed and built, and measurement results showed drain efficiency of 70% and second harmonic rejection of more than 84 dBc (as well as higher harmonics), and output power level more than 6.5 W with ±0.5 dB power flatness, across very high frequency (VHF) band (136-174 MHz). The performance achieved demonstrated highest harmonic suppression across wide bandwidth for VHF range according to authors' knowledge. Simulations of power performance (i.e. efficiency and output power) were verified by measurements, and good agreements were obtained.

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Section: Resultsmentioning

confidence: 99%

Optimised high‐efficiency Class E radio frequency power amplifier for wide bandwidth and high harmonics suppression

Kumar¹,

YewKok²

2014

IET Circuits, Devices & Systems

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“…A power amplifier (PA) as the key device of the transmitter, which meets the demands of broadband, is usually integrated on chip to provide high power signal. Meanwhile, the PA always consumes the most direct current power consumption, and its efficiency dominates the lifetime of the battery [4,5]. So realization a broadband PA with high efficiency is one of the main trends.…”

Section: Introductionmentioning

confidence: 99%

A 45–2500 MHz high efficiency power amplifier with novel adaptive bias technique

Ren

Zou

2020

IEICE Electron. Express

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The adaptive bias technique is the common technology for improving the power-added efficiency (PAE) of the power amplifier (PA). However, the performance of the adaptive bias technique is sensitive to the frequency variation. This paper presents a novel adaptive bias as the common-source bias of the 45-2500 MHz CMOS PA, which combines the subthreshold PD to decrease the effect on frequency of adaptive bias technique and a unity gain amplifier to increase the detection sensitivity, for improving the PAE at back-off mode over the wide bandwidth. The proposed PA provides a good performance from 45 MHz to 2500 MHz, while the peak of the saturation output power is 24.02 dBm over the frequency band. Moreover, the maximum PAE achieves 44.61 % at 500 MHz and the PAE is larger than 28.48 % at 3 dB back-off power. The chip size of the broadband PA achieves 1.87 mm 2 at TSMC 0.18 um technology process. It draws 200 mA from 3.3 V supply voltage.

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“…Furthermore, when tuning high efficiency performance of the amplifier for wide bandwidth, harmonic levels will be higher [3]. Many works have been published studying high efficiency designs with harmonic suppression features [6,8,9,10]. This letter discusses the idea of a conceptual wide bandwidth Class E PA design approach combining a parallel-circuit load network with reactance compensation technique, a harmonic trap circuit as well as a high order elliptic filter for further harmonics suppression.…”

Section: Introductionmentioning

confidence: 99%

A design technique to improve harmonic suppression in high efficiency wideband Class E RF power amplifier

Kumar

YewKok

2014

IEICE Electron. Express

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This paper introduces a new wide bandwidth Class E power amplifier providing high order harmonic suppression circuit. A design technique is presented on the methodology to achieve wideband high efficiency performance while preserving high harmonic suppression. A prototype board demonstrated drain efficiency of 70% and second harmonic rejection of more than 84 dBc (as well as higher harmonics), and output power level more than 6.5 W with ±0.5 dB power flatness, across VHF band (136-174 MHz). Simulations of power performance (i.e. efficiency and output power) were verified by measurements, and good agreements were obtained.

show abstract

A High Efficiency Broadband Class-E Power Amplifier Using a Reactance Compensation Technique

Cited by 28 publications

References 14 publications

Optimised high‐efficiency Class E radio frequency power amplifier for wide bandwidth and high harmonics suppression

Optimised high‐efficiency Class E radio frequency power amplifier for wide bandwidth and high harmonics suppression

A 45–2500 MHz high efficiency power amplifier with novel adaptive bias technique

A design technique to improve harmonic suppression in high efficiency wideband Class E RF power amplifier

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