Design of Ultrawideband High-Efficiency Extended Continuous Class-F Power Amplifier

Zheng, Shao Yong; Liu, Zhao Wu; Zhang, Xiu Yin; Zhou, Xin Yu

doi:10.1109/tie.2017.2772163

Cited by 106 publications

(53 citation statements)

References 26 publications

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“…Consequently, the two parameters Z c1 and θ c1 of the transmission line TL c1 can be determined. According to the above principle of harmonic impedance transformation, a similar procedure can also be used for 2f 3 and 2f 4 . Based on Equations (12) and (13), the short-circuit condition at 2f 3 and 2f 4 can be satisfied at plane S 2 .…”

Section: Design Principlementioning

confidence: 99%

“…In order to promote the development of communication system, many multiband and broadband structures have been presented. In the above two schemes, the broadband solutions has better extensibility in terms of compatibility for future wireless communication standards …”

Section: Introductionmentioning

confidence: 99%

“…In the above two schemes, the broadband solutions has better extensibility in terms of compatibility for future wireless communication standards. 3 Consequently, the future generation RF front-end should afford the anticipated bandwidth and maintain well operation efficiency simultaneously. In particular, the characteristics of…”

mentioning

confidence: 99%

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Design of multioctave high‐efficiency power amplifier based on extended continuous Class‐B/J modes

Xuan

Yang

Liu

2019

Int J RF Microw Comput Aided Eng

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The bandwidth covered by contemporary communication technologies has reached over an octave. But most existing power amplifier (PA) configurations cannot meet this requirement while at the same time maintaining a high efficiency. Therefore, a novel structure for bandwidth enhancement at a high efficiency level is proposed together with the systematic design methodology in this article. The difficulty lies in the overlap of the fundamental and harmonic frequencies. On this issue, the extended continuous Class‐B/J mode can extend the impedance of the second harmonic to a resistive‐reactive and relax design requirements for overlapping design space of fundamental and second harmonic frequencies. Specifically, the presented innovative circuit structure uses the multiple frequencies matching method to manipulate four fundamental and the corresponding second harmonics frequency points simultaneously, which can further effectively expand the bandwidth on the basis of the extended continuous Class‐B/J PA. To verify the validity of the proposed theory, a gallium nitride multioctave PA is designed, implemented, and measured. Measured results show a fractional bandwidth of 148.4% from 0.4 to 2.7 GHz, with drain efficiency of 63%‐78%, saturated output power greater than 39 dBm, and large signal gain larger than 9 dB. For the single carrier WCDMA signal with a channel bandwidth of 3.84 MHz and a peak to average power ratio of 6 dB, the adjacent channel power ratio of −47.5 to −35 dBc and −42.8 to −31.5 dBc at an average output power of 33 and 36 dBm separately are achieved over the whole frequency band.

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Section: Design Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of multioctave high‐efficiency power amplifier based on extended continuous Class‐B/J modes

Xuan

Yang

Liu

2019

Int J RF Microw Comput Aided Eng

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“…9,10 Hence, we present a new design methodology to implement hybrid power amplifiers. At the same time, in order to expand bandwidth, multiple frequency points method [11][12][13][14] is employed for circuit design, which is a very important factor that also affects the circuit performance.…”

Section: Introductionmentioning

confidence: 99%

A broadband class‐F/J hybrid power amplifier

Guo

Cheng

et al. 2020

Micro & Optical Tech Letters

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This article proposes a new broadband high-efficiency hybrid power amplifier (PA) design methodology that combines a class-J PA with a class-F PA using GaN HEMT CGH40010F. Multifrequency harmonic control method is employed to achieve harmonic matching network for increasing the bandwidth of the PA. In order to validate the effectiveness of the proposed method, a 1 to 2.8 GHz broadband class F/J PA is designed and fabricated. The simulation and measurement results show that the saturated output power is 40 to 42 dBm, the gain is over 10 dB and the drain efficiency is 65% to 71% at the frequency of 1 to 2.8 GHz.

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“…Recently, many high-efficiency RF PAs have been reported in [3,4,5,6,7,8,9,10,11]. The traditional harmonic control PAs such as Class F PAs [12,13,14,15] and switch PAs like class E PAs [16,17,18,19] have become the research hotspots because of their ideal 100% drain efficiency. The hybrid class EF PAs presented in [20] have received more and more attention recently for which they have the advantages of both class E and class F PAs.…”

Section: Introductionmentioning

confidence: 99%

Design of broadband Class EF power amplifier based on low-pass filter matching structure

Zhang

Cheng

Liu

2019

IEICE Electron. Express

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This paper proposes a broadband Class EF power amplifier based on a low-pass filter matching structure. Based on the theory of Class EF power amplifiers, the optimal fundamental load impedance required is derived. A broadband matching circuit is then designed using a low-pass filter prototype. In the meantime, a compact harmonic control circuit is proposed to meet the harmonic impedance requirements of class EF power amplifiers. In order to validate the effectiveness of the proposed method, a 2.6-3.6 GHz broadband class EF power amplifier is designed and fabricated. Measurement results show that the output power is between 40.68 dBm and 41.6 dBm at 1 dB compression point in 2.6-3.6 GHz. From 62% to 78% drain efficiency is obtained with gain greater than 10 dB.

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Design of Ultrawideband High-Efficiency Extended Continuous Class-F Power Amplifier

Cited by 106 publications

References 26 publications

Design of multioctave high‐efficiency power amplifier based on extended continuous Class‐B/J modes

Design of multioctave high‐efficiency power amplifier based on extended continuous Class‐B/J modes

A broadband class‐F/J hybrid power amplifier

Design of broadband Class EF power amplifier based on low-pass filter matching structure

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