Monolithic multilevel GaN converter for envelope tracking in RF power amplifiers

Sepahvand, Alihossein; Momenroodaki, Parisa; Zhang, Yuanzhe; Popović, Zoya; Maksimović, Dragan

doi:10.1109/ecce.2016.7855275

Cited by 22 publications

(9 citation statements)

References 17 publications

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“…A photo of the SM circuit can be seen in Fig. 1(b), and a detailed discussion of the design and characterization is presented in [16].…”

Section: K-band Amplifier and Discrete Supply Modulator Mmicsmentioning

confidence: 99%

“…Continuous supply modulators, usually based on a fast DC-DC converter [11,12], have limited slew rates if operated efficiently, with degraded performance for higher bandwidth signals [11,13]. Alternative discrete supply modulators (DSM), usually based on a bank of switches [14][15][16], approximate the continuous supply modulator voltage, and can be operated with a lower switching speed and thus perform better for broadband signals [14].…”

Section: Introductionmentioning

confidence: 99%

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Distortion mitigation for 100 and 250 MHz discrete supply modulation of a three-stage K-band MMIC PA

Duffy

Lasser²,

Popović³

2020

Int. J. Microw. Wireless Technol.

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Abstract This paper presents a high-efficiency linear GaN K-band transmitter for broadband high peak-average power ratio (PAPR) signals. A GaN MMIC 18.5–24 GHz three-stage power amplifier with over 4 W peak output power, 20 dB saturated gain, and 40% peak PAE is supply-modulated with a four-level discrete dynamic supply GaN MMIC. For 100 MHz signals with ${\rm PAPR}\gt 10\, {\rm dB}$ , we demonstrate an average efficiency improvement from 14 to 20% with a simultaneous linearity improvement in noise power ratio (NPR) from 23 to 26 dB through a shaping function focused on gain linearization. For 250 MHz signal bandwidth, there is no observed degradation in NPR and the efficiency is improved by 5 percentage points. For discrete supply modulation, the switching transients between levels are experimentally investigated for wideband signals.

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“…A photo of the SM circuit can be seen in Fig. 1(b), and a detailed discussion of the design and characterization is presented in [16].…”

Section: K-band Amplifier and Discrete Supply Modulator Mmicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distortion mitigation for 100 and 250 MHz discrete supply modulation of a three-stage K-band MMIC PA

Duffy

Lasser²,

Popović³

2020

Int. J. Microw. Wireless Technol.

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“…This method requires fewer supplies than other DSM topologies [26, 27]. The number of supply voltages needed to produce the required drain voltage levels scales linearly, while the number of discrete drain voltage levels scales exponentially.…”

Section: Amplifier and Dsmmentioning

confidence: 99%

“…This benefit comes with the drawback of having the conducting half‐bridge switches in series at all times. To compensate for the increased conduction losses in this circuit, the sizes of the switches are increased (9.6 mm versus 3.9 mm) when compared to similar integrated supply modulator designs done in the same 150 nm GaN process [27, 28]. While this does mitigate some of the added conduction loss in the circuit, it simultaneously increases the switching loss and reduces the maximum switching frequency.…”

Section: Amplifier and Dsmmentioning

confidence: 99%

Efficiency and linearity enhancement of a two‐stage X‐band PA through simultaneous gate and drain supply modulation

Duffy

Lasser

Cappello

et al. 2020

IET Microwaves, Antennas & Propagation

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“…The supply rail changes can induce unnecessary noise into the RF path therefore a smoothing LPF is used in between the LDO and the RF choke. Moreover, the power rail switching algorithm must be time-interleaved with appropriate dead times to achieve the highest efficiency without compromising the reliability of the multimode supply source (Wang, 2014;Vasic, Garcia et al, 2010;Wang, Jin & Ruan, 2016;Sepahvand, Momenroodaki & Zhang, 2016).…”

Section: Envelope Tracking Architecturementioning

confidence: 99%

Mid-band 5G wireless network power amplifier research

Vasjanov¹

2019

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Vilnius 2019 Disertacija rengta 2015-2019 metais Vilniaus Gedimino technikos universitete. Vadovas doc. dr. Vaidotas BARZDĖNAS (Vilniaus Gedimino technikos universitetas, elektros ir elektronikos inžinerija-T 001). Vilniaus Gedimino technikos universiteto Elektros ir elektronikos inžinerijos mokslo krypties disertacijos gynimo taryba: Pirmininkas prof. habil. dr. Romualdas NAVICKAS (Vilniaus Gedimino technikos universitetas, elektros ir elektronikos inžinerija-T 001). Nariai: dr. Alvydas LISAUSKAS (Lenkijos mokslų akademijos Aukšto slėgio fizikos institutas, fizika-N 002), doc. dr. Vitalij NOVICKIJ (Vilniaus Gedimino technikos universitetas, elektros ir elektronikos inžinerija-T 001), prof. dr. Šarūnas PAULIKAS (Vilniaus Gedimino technikos universitetas, elektros ir elektronikos inžinerija-T 001), prof. dr. Algimantas VALINEVIČIUS (Kauno technologijos universitetas, elektros ir elektronikos inžinerija-T 001). Disertacija bus ginama viešame Elektros ir elektronikos inžinerijos mokslo krypties disertacijos gynimo tarybos posėdyje 2019 m. birželio 13 d. 10 val. Vilniaus Gedimino technikos universiteto senato posėdžių salėje.

show abstract

Monolithic multilevel GaN converter for envelope tracking in RF power amplifiers

Cited by 22 publications

References 17 publications

Distortion mitigation for 100 and 250 MHz discrete supply modulation of a three-stage K-band MMIC PA

Distortion mitigation for 100 and 250 MHz discrete supply modulation of a three-stage K-band MMIC PA

Efficiency and linearity enhancement of a two‐stage X‐band PA through simultaneous gate and drain supply modulation

Mid-band 5G wireless network power amplifier research

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