Design of Class-E&lt;inf&gt;M&lt;/inf&gt; power amplifier taking into account auxiliary circuit

Miyahara, Ryosuke; Sekiya, Hiroo; Kazimierczuk, Marian K.

doi:10.1109/iecon.2008.4758035

Cited by 8 publications

(9 citation statements)

References 8 publications

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“…Crucially, the analysis of the auxiliary circuit was not presented in [2], thus, the ZVS condition was not fulfilled in the auxiliary circuit, resulting in a poor efficiency of 58% for the auxiliary circuit although the main circuit exhibits a high efficiency of 89%. This issue was addressed in [3]- [4] where both the main and auxiliary circuits were analyzed simultaneously, but this results in a large system of nonlinear equations requiring to be solved by numerical methods, thus adding to the complexity in the design of a Class-EM PA. Furthermore, we failed to reproduce the idealized switch voltage and current waveforms using the component values provided in Table IV of [4].…”

Section: Introductionmentioning

confidence: 99%

Closed-Form Design Equations for Class-E_M Power Amplifier with Isolation Circuit

Mugisho¹,

Thian²

2018

2018 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC)

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Section: Introductionmentioning

confidence: 99%

Closed-Form Design Equations for Class-E_M Power Amplifier with Isolation Circuit

Mugisho¹,

Thian²

2018

2018 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits (INMMIC)

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“…7(a)-(e) that , , , , and have similar characteristics to those of the classoscillator [18], which means that the existence of the feedback network does not affect the element values of the main and injection circuits.…”

Section: Design Curvementioning

confidence: 83%

“…The input power was measured by the Textronix TDS3014B oscilloscope. Power-conversion efficiency, poweradded efficiency, and total harmonic distortion (THD) were calculated by (18) …”

Section: Derivation Of the Element Valuesmentioning

confidence: 99%

Design of Class-E$_{\rm M}$ Oscillator With Second Harmonic Injection

Miyahara

Wei

Nagashima

et al. 2012

IEEE Trans. Circuits Syst. I

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This paper presents the class-E oscillator with the second-harmonic injection current, along with its design procedure, design curves, and design example. In the proposed oscillator, the output frequency of the proposed oscillator is locked with the input frequency of the injection circuit. Additionally, the switch-voltage and switch-current waveforms in the main circuit achieve the class-E zero-voltage switching, zero-voltage-derivative switching, zero-current switching, and zero-current-derivative switching (ZVS/ZVDS/ZCS/ZCDS) conditions and the switch voltage waveform in the injection circuit satisfied the class-E ZVS/ZDS conditions. In the laboratory experiment, the oscillator achieved 92.0% power-conversion efficiency at 34.8 W output power and 1 MHz operating frequency. The experimental results agreed with the numerical predictions quantitatively, which denotes the validity of the design procedure.

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“…However, it was shown in [2] that some of the core design equations presented in [1] are incorrect and ambiguous while the analyses in [3]- [4] result in a large system of nonlinear equations whose solutions offer little insights into how the circuit operates, thus hampering the widespread usage thereof. Although the simplified and accurate analysis presented in [2] results in explicit design equations, the optimum fundamental-frequency load impedance Zopt(f0) presented to the main switch is capacitive.…”

Section: Introductionmentioning

confidence: 99%

“…The circuits analysed in [1]- [4] employ ideal RF chokes. In this paper, we propose a new Class-EM PA topology which employs a finite DC-feed inductance and an isolation circuit.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of a High-Efficiency Class-E_M Power Amplifier

Mugisho

Thian

Grebennikov³

2019

2019 IEEE Radio and Wireless Symposium (RWS)

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The Class-EM power amplifier (PA) offers the possibility of achieving high-efficiency operations at high operating frequencies while using slow-switching transistors. This is made possible by the adoption of the ZVS/ZVDS/ZCS and ZCDS conditions on the main circuit and the adoption of the ZVS condition on the auxiliary circuit. In this paper, we present the analysis and design of a new topology of the Class-EM PA incorporating a finite DC-feed inductance and an isolation circuit, rendering it more attractive for implementations. Furthermore, we propose a novel transmission-line load network that provides the drain of the transistor with the required load impedances at the fundamental frequency as well as at even and odd harmonic frequencies for the main and the auxiliary circuits. The concept is verified through harmonicbalance simulations with the PA exhibiting a peak drain efficiency of 90.3%, a peak power added efficiency of 86.7%, and a peak output power of 41.2 dBm at an operating frequency of 1.5 GHz.

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Design of Class-E<inf>M</inf> power amplifier taking into account auxiliary circuit

Cited by 8 publications

References 8 publications

Closed-Form Design Equations for Class-E_M Power Amplifier with Isolation Circuit

Closed-Form Design Equations for Class-E_M Power Amplifier with Isolation Circuit

Design of Class-E$_{\rm M}$ Oscillator With Second Harmonic Injection

Analysis and Design of a High-Efficiency Class-E_M Power Amplifier

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Design of Class-E<inf>M</inf> power amplifier taking into account auxiliary circuit

Cited by 8 publications

References 8 publications

Closed-Form Design Equations for Class-EM Power Amplifier with Isolation Circuit

Closed-Form Design Equations for Class-EM Power Amplifier with Isolation Circuit

Design of Class-E$_{\rm M}$ Oscillator With Second Harmonic Injection

Analysis and Design of a High-Efficiency Class-EM Power Amplifier

Contact Info

Product

Resources

About

Closed-Form Design Equations for Class-E_M Power Amplifier with Isolation Circuit

Closed-Form Design Equations for Class-E_M Power Amplifier with Isolation Circuit

Analysis and Design of a High-Efficiency Class-E_M Power Amplifier