Alternative and Mixed-Mode High-Efficiency Power Amplifiers

Grebennikov, Andrei; Sokal, Nathan O.; Franco, Marc J.

doi:10.1016/b978-0-12-415907-5.00009-2

Cited by 2 publications

(4 citation statements)

References 72 publications

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“…Referring to the equations for the output waveform of Class E PA, 15 the normalized current of the Class EF PA is supposed to be as

\frac{I}{I_{italicDC}} goodbreak= \frac{π}{2} \sin ((), θ) goodbreak- \cos ((), θ) goodbreak+ 1

in which

I

I_{DC}

, and

θ

are the total current, DC current and angle of waveform change, respectively.…”

Section: The New Waveform and Harmonic Reactance For Class Ef Pamentioning

confidence: 99%

“…The drain current waveform of Class EF PA is more similar to that of Class E PA, while the voltage waveform is flattened and shaped, as shown in Figure 3. Therefore, when deriving the waveform expression equations for the Class EF PA, assumptions can be made based on the waveform expression equations for the Class E PA. 15 Under ideal conditions, the Class EF PA will satisfy the optimum switching operating conditions shown in Equation (2) at the moment ωt ¼ 2π.…”

Section: The New Waveform and Harmonic Reactance For Class Ef Pamentioning

confidence: 99%

“…Referring to the equations for the output waveform of Class E PA, 15 the normalized current of the Class EF PA is supposed to be as…”

Section: The New Waveform and Harmonic Reactance For Class Ef Pamentioning

confidence: 99%

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Design theory of broadband high‐efficiency continuous Class EF power amplifier based on new continuous factor

Chang

Luo

Hong

2023

Circuit Theory & Apps

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SummaryThis paper presents the design theory for continuous Class EF power amplifier (PA). This theory facilitates the implementation of broadband designs for high‐efficient Class EF PA. First, combining with the switching operating conditions and harmonic tuning technique, the drain waveform expressions of Class EF PA is derived. The corresponding third harmonic component can get its impedance in form of pure reactance, which simplifies the matching process while maintaining the efficiency. Second, a new continuous factor (CF) dedicated to the continuous Class EF PA can be obtained, with applying waveform mapping concept. The new CF expands the impedance point of Class EF PA into the impedance space. This greatly enhance the flexibility of broadband design. With this new theory, the design of broadband Class EF PA becomes very simple. As a verification, a Class EF PA operating at 2.4–3.8 GHz has been designed using CREE GaN HEMT CGH40010F. The PA can achieve the gain of 9.1–11.2 dB, the output power of 39.1–41.2 dBm, the PAE of 66.3%–74.1%, and the DE of 69.5%–76.2%. Both simulated and measured data show very good consistency and prove the rationality and validity of the proposed theory.

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“…Referring to the equations for the output waveform of Class E PA, 15 the normalized current of the Class EF PA is supposed to be as

\frac{I}{I_{italicDC}} goodbreak= \frac{π}{2} \sin ((), θ) goodbreak- \cos ((), θ) goodbreak+ 1

in which

I

I_{DC}

, and

θ

are the total current, DC current and angle of waveform change, respectively.…”

Section: The New Waveform and Harmonic Reactance For Class Ef Pamentioning

confidence: 99%

Section: The New Waveform and Harmonic Reactance For Class Ef Pamentioning

confidence: 99%

See 1 more Smart Citation

Design theory of broadband high‐efficiency continuous Class EF power amplifier based on new continuous factor

Chang

Luo

Hong

2023

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…The first and the second derivatives of the imaginary part should be zero to maximize the bandwidth at the operating frequency [22].…”

Section: Iet Circuits Devices and Systemsmentioning

confidence: 99%

An Approach to Increase Power-Added Efficiency in a 5 GHz Class E Power Amplifier in 0.18 µm CMOS Technology

Jobaneh

2023

IET Circuits, Devices & Systems

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A new approach to increasing the power-added efficiency (PAE) of a class E power amplifier (PA) is proposed in this paper. The PA operates at a 5 GHz frequency and a reactance compensation technique is utilized to maximize the bandwidth at the operating frequency. The driver stage creates either a half-wave rectified sine wave or a half-wave rectified sawtooth wave. By applying each one of the waves, the performance of the PA is examined and PAE = 70% and PAE = 50% is achieved. Plus, the output power of the PA is about 26 dBm when the DC voltage supply is 1.8 V. Advanced design system and TSMC 0.18 µm CMOS process are utilized to carry on the simulation.

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Alternative and Mixed-Mode High-Efficiency Power Amplifiers

Cited by 2 publications

References 72 publications

Design theory of broadband high‐efficiency continuous Class EF power amplifier based on new continuous factor

Design theory of broadband high‐efficiency continuous Class EF power amplifier based on new continuous factor

An Approach to Increase Power-Added Efficiency in a 5 GHz Class E Power Amplifier in 0.18 µm CMOS Technology

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