Dual-Band Class-F Power Amplifier With Bandwidth Expansion Based on Sector Microstrip Branch for 5G Applications

Zhao, Hongyi; Zhang, Dan

doi:10.1109/lmwc.2021.3074411

Cited by 16 publications

(13 citation statements)

References 12 publications

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“…To expand the bandwidth of the dual-band PA, the broadband MNs are utilized in the dual-band PA design. 6,7 The bandwidth can be extended to more than 150 MHz.…”

Section: Introductionmentioning

confidence: 99%

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A novel dual‐band highly efficient power amplifier for 5G applications

Zhao

Wang

et al. 2022

Int J RF Mic Comp-Aid Eng

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This paper presents a novel dual-band highly efficient power amplifier (PA) design for 5G applications. The presented dual-band matching network consists of an impedance tuning network and a dual-band impedance transformer. This structure can not only achieve the precise fundamental and second harmonic control at two 5G bands, but also the excellent dual-band filtering response. Compared with other dual-band PAs, it shows better frequency selectivity and wider bandwidth. For demonstration, a dual-band PA is designed, fabricated, and measured. The measured results display the power added efficiencies of 60% and 47% at 2.5 GHz and 3.5 GHz (bandwidth >150 MHz) under the saturated output power of above 40 dBm, and excellent frequency selectivity with return loss (> 14.7 dB) and stopband rejection (> 25.2 dB).

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“…To expand the bandwidth of the dual-band PA, the broadband MNs are utilized in the dual-band PA design. 6,7 The bandwidth can be extended to more than 150 MHz.…”

Section: Introductionmentioning

confidence: 99%

“…However, none of the dual‐band PAs mentioned above can support a wider bandwidth for 5G communications. To expand the bandwidth of the dual‐band PA, the broadband MNs are utilized in the dual‐band PA design 6,7 . The bandwidth can be extended to more than 150 MHz.…”

Section: Introductionmentioning

confidence: 99%

A novel dual‐band highly efficient power amplifier for 5G applications

Zhao

Wang

et al. 2022

Int J RF Mic Comp-Aid Eng

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“…It may be possible to add a bandwidth expansion structure to solve this problem. 5 In this study, a Class-F PA for 1.3-2.5 GHz was fabricated by step-matching, combining a harmonic control structure with a parasitic compensation circuit. The proposed bandwidth expansion structure can resolve the efficiency reduction otherwise caused by the overlapping of harmonic impedance and fundamental impedance, ultimately yielding an improved Class-F PA that is operational at 1.1-2.5 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…This substantially restricts the frequency selection of Class‐F PAs and indirectly reduces their bandwidths. It may be possible to add a bandwidth expansion structure to solve this problem 5 …”

Section: Introductionmentioning

confidence: 99%

Wideband Class‐F power amplifier design based on harmonic control analysis and bandwidth expansion structure

Zhao

Zhang

2022

Micro & Optical Tech Letters

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This paper proposes a novel Class‐F broadband power amplifier design method. A Class‐F power amplifier for 1.3–2.5 GHz is fabricated by step‐matching, combining a harmonic control structure and a parasitic compensation circuit. A bandwidth expansion structure is established based on microstrip lines and capacitor. The proposed structure resolves the low efficiency caused by the coincidence of the fundamental frequency band and second harmonic frequency band, which allows the power amplifier to function properly from 1.1 to 2.5 GHz. A high‐efficiency broadband power amplifier is tested to find that the saturated output power with the proposed device is between 40.1 and 41.7 dBm, the gain is from 9.3 to 14.4 dB, and the drain efficiency is 60.8%–84.2% at 1.1–2.5 GHz frequency.

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“…After several decades of research, there are many forms of PAs [1]. Among them, the switching-mode PAs, such as class-E PAs [2,3,4,5], class-F PAs [6,7,8,9], class-J PAs [10,11,12,13] and hybrid class PAs [14,15,16,17,31], can realize high-efficiency and high-power. Besides, impedance transformer is another effective method for PA design [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

A power amplifier by using asymmetrical branch-line coupler

Peng²,

Wang

et al. 2022

IEICE Electron. Express

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In this paper, a novel power amplifier (PA) is proposed. An asymmetrical branch-line coupler is exploited as the output matching circuits of the proposed PA. Meanwhile, by setting the impedance conditions with trade-off in desired pass-band appropriately, impedance matching and output power combination can be realized in a single circuit. A brief analysis of the asymmetrical branch-line coupler is presented. Compared with the traditional high-power PAs design method, this design method can meet the requirement of the miniaturization. To prove the validity of the proposed method, a PA works at 2 GHz is designed, fabricated and measured by using a 10-W gallium nitride (GaN) transistor (CGH40010F). The measured results show that a saturated output power of 42.8-45.2 dBm with a poweradded efficiency of 52.0-62.6% is achieved and a saturated power gain between 7.9 and 10.1dB.

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Dual-Band Class-F Power Amplifier With Bandwidth Expansion Based on Sector Microstrip Branch for 5G Applications

Cited by 16 publications

References 12 publications

A novel dual‐band highly efficient power amplifier for 5G applications

A novel dual‐band highly efficient power amplifier for 5G applications

Wideband Class‐F power amplifier design based on harmonic control analysis and bandwidth expansion structure

A power amplifier by using asymmetrical branch-line coupler

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