A methodology for designing class-F−1/J(J−1) high efficiency concurrent dual-band power amplifier

Shariatifar, Milad; Jalali, Mohsen; Abdipour, Abdolali

doi:10.1016/j.mejo.2018.09.006

Cited by 6 publications

(6 citation statements)

References 13 publications

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“…Thus, the impedance of the transistor is complex. And the matching network converts the impedance to a specific value [14]. And the imaginary part of the impedance is usually considered to be provided by the capacitor [15,16].…”

Section: Proposed Network Topologymentioning

confidence: 99%

A Broadband Power Amplifier Based on a Novel Filter Matching Network

Nan

Gao

et al. 2022

Electronics

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This paper presents a new realization method of a broadband power amplifier based on a novel filter matching network. The novel matching network based on band-pass filter has an excellent frequency-selection function, which can ensure the novel matching network has excellent characteristics in the aim band and generates the out-of-band harmonic suppression. Finally, we manufactured the power amplifier and measured it. The saturated output power is greater than 40 dBm in the range of 1 to 3 GHz, limited to ±1.5 dB of the gain flatness, and the rejection of harmonic is stronger than −20 dBc.

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Section: Proposed Network Topologymentioning

confidence: 99%

A Broadband Power Amplifier Based on a Novel Filter Matching Network

Nan

Gao

et al. 2022

Electronics

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“…To improve the DE of a DBPA, harmonic load impedance should be well controlled 15,19–25 . In 2018, Huang et al 15 designed a harmonic‐tuned DBPA that achieves DEs of 76.2% and 71.6% at 1.8 and 2.65 GHz, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…In 2018, Huang et al 15 designed a harmonic‐tuned DBPA that achieves DEs of 76.2% and 71.6% at 1.8 and 2.65 GHz, respectively. Moreover, high efficiency operation modes can be introduced to the DBPA to boost the conversion efficiency 20–25 . In 2018, Yang et al 22 designed a class‐F DBPA, which obtains DEs of 76.7% and 72.8% at 2.6 and 3.5 GHz, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Design of a dual‐band power amplifier over an octave bandwidth employing dual‐band resonators

Liu

Liu²,

Shao³

et al. 2023

Int J Numerical Modelling

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In this article, a compact dual‐band resonator is proposed for designing dual‐band power amplifiers (DBPAs). The proposed resonator has the characteristics of the band‐pass filters, suppressing the out‐of band signals. It is illustrated the proposed resonator has a simple circuit topology without sacrificing the performances of the DBPA. To verify the methodology, a high efficiency DBPA prototype operating at 1.72 and 3.48 GHz is fabricated and measured. The DBPA obtains a bandwidth of 100 and 50 MHz at the low and high frequency bands, respectively. The measurement results show that the DBPA delivers a saturation power of 43.1 and 40.8 dBm at 1.72 and 3.48 GHz, respectively. The measured drain efficiencies of the DBPA are 75.4% and 68.6% at 1.72 and 3.48 GHz, respectively. Meanwhile, when the DBPA is stimulated by a 20 MHz LTE signal with a peak to average power ratio (PAPR) of 7 dB, the measured adjacent channel leakage ratios are lower than −50 dBc at both 1.72 and 3.48 GHz after digital predistortion.

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“…9 Recent concurrent dualband PAs mainly employ dual-band matching networks to realize operating at two distinct bands using only one active device. [10][11][12] Although under single stimulus (also known as single operation mode) their operation are mainly satisfying, in concurrent operation mode where the PA receives simultaneous stimuli (please see Figure 1), the performance in terms of efficiency and output power will be inevitably degraded. The reason is mainly the additional undesirable intermodulation (IM) components and more harmonic terms which impose extra dissipated power.…”

Section: Introductionmentioning

confidence: 99%

Design of a high‐efficiency dual‐band class‐J/J power amplifier considering concurrent‐mode input drive

Shariatifar

Jalali

Abdipour

2019

Int J RF Microw Comput Aided Eng

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This article analyses concurrent dual-band Class-J/J power amplifiers (PAs) with simultaneous input drive at both bands. Although it is well known that the Class-J PA has the same performance regarding the efficiency compared with the conventional Class-B PA, in this article, we show that concurrent-mode efficiency of Class-J/J dual-band power amplifier is higher than the Class-B/B counterparts much closer to their single-mode efficiency. Furthermore, it has been explained that the performance of concurrent operation of dual-band PAs is highly dependent to the design space of PA load reactance at intermodulation terms. We also explore that at intermodulation frequencies the design space includes an efficiency degradation region occurring around a specific impedance, which should be avoided when designing for concurrent operation mode. The dependency of the concurrent-mode efficiency to the nonlinearity performance of the transistor output capacitance is also considered. A concurrent dual-band Class-J/J PA operating at 1.842 and 2.655 GHz bands is implemented, where the harmonic and intermodulation control networks are designed based on closed-form equations. Measured results reveal that about 60% balanced concurrent-mode efficiency can be achieved, which outperforms recently reported counterparts. At the lower and upper bands, output powers of 41 and 40.5 dBm and efficiencies of 73.5% and 71.7% are obtained, respectively. K E Y W O R D Sclass-J, concurrent dual-band power amplifier, high efficiency, intermodulation tuning

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A methodology for designing class-F−1/J(J−1) high efficiency concurrent dual-band power amplifier

Cited by 6 publications

References 13 publications

A Broadband Power Amplifier Based on a Novel Filter Matching Network

A Broadband Power Amplifier Based on a Novel Filter Matching Network

Design of a dual‐band power amplifier over an octave bandwidth employing dual‐band resonators

Design of a high‐efficiency dual‐band class‐J/J power amplifier considering concurrent‐mode input drive

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