Tuning analysis for the high-Q class-E power amplifier

Cantrell, W.H.

doi:10.1109/22.898989

Cited by 64 publications

(10 citation statements)

References 5 publications

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“…Class-E waveform is obtained at the drain of the switching MOSFET [9] [12]. The choke inductor, L Choke , is selected to be sufficiently large that the input current ripple is sufficiently low to be considered DC.…”

Section: Analysis Of Inductively Coupled Circuitmentioning

confidence: 99%

Wireless implantable EMG sensing microsystem

2008

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Section: Analysis Of Inductively Coupled Circuitmentioning

confidence: 99%

Wireless implantable EMG sensing microsystem

2008

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“…The sensitivity of the class-E PAs to circuit components variations was studied in [8], [9]. In [8], [9], from a loadmismatch point of view, the effect of the load-mismatch was investigated for very specific cases of having mismatch (only) on the real part or (only) on the imaginary part of the PA load, separately. However, under load-mismatch and for high voltage standing wave ratios (VSWRs) both the real and the imaginary parts of the PA load (simultaneously) can heavily change.…”

Section: Introductionmentioning

confidence: 99%

Load Mismatch Sensitivity of Class-E Power Amplifiers

Ghahremani

Annema

Nauta

2019

IEEE Trans. Microwave Theory Techn.

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Class-E RF Power Amplifiers (PAs) are very power efficient under nominal operating conditions. Due to incorporating two tuned tanks, the dependency on the load impedance is however relatively large, resulting in e.g. load dependent output power, power efficiency, peak voltages and peak (and average) currents which can lead to reliability issues. This paper presents load-pull analyses for class-E RF power amplifiers from a mathematical perspective, with analyses and discussions of the effects of the most common non-idealities of class-E PAs: the limited loaded quality factor (Q loaded) of the series filter, switch on-resistance, limited quality factor of the dc-feed inductor, loadmismatch dependent switch conduction loss and the limited negative voltage excursions (due to e.g. the reverse conduction of the switch transistor for negative voltage excursions). The theoretical findings are backed up by extensive circuit simulations and loadpull measurements of a class-E power amplifier implemented in 65 nm CMOS technology. The PA provides 18.1 dBm output power and 72% efficiency at 1.4 GHz under nominal operating condition employing an off-chip matching network.

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“…Microwave photonic systems have been extensively studied in the last few years [1]. One of the key functions of a microwave photonic system is microwave signal processing, such as filtering, correlation, and frequency up or down conversion.…”

Section: Introductionmentioning

confidence: 99%

Slow and fast light effects in a tilted fiber Bragg grating and the application in a continuously tunable microwave photonic filter

Shahoei

Yao

2013

2013 IEEE MTT-S International Microwave Symposium Digest (MTT)

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Slow and fast light effects in a tilted fiber Bragg grating (TFBG) and the application in a tunable microwave photonic filter are studied. A TFBG has multiple cladding mode resonances. By optically pumping, the magnitude and group delay responses of the cladding mode resonances are changed, which are used to achieve a phase delay or advance. The use of a TFBG in a delay-line filter would lead to the tuning of the spectral response. A frequency-tunable microwave photonic filter is demonstrated.Index Terms -Optical microwave phase shifter, tilted fiber Bragg grating (TFBG), microwave photonic filter, microwave photonics.

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Tuning analysis for the high-Q class-E power amplifier

Cited by 64 publications

References 5 publications

Wireless implantable EMG sensing microsystem

Wireless implantable EMG sensing microsystem

Load Mismatch Sensitivity of Class-E Power Amplifiers

Slow and fast light effects in a tilted fiber Bragg grating and the application in a continuously tunable microwave photonic filter

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