This paper describes the efficiency-limiting factors resulting from transistor current source in the case of class-F and inverse class-F (F-1) operations under saturated region. We investigated the influence of knee voltage and gate-voltage clipping behaviors on drain efficiency as limiting factors for the current source. Numerical analysis using a simplified transistor model was carried out. As a result, we have demonstrated that the limiting factor for class-F-1 operation is the gate-diode conduction rather than knee voltage. On the other hand, class-F PA is restricted by the knee voltage effects. Furthermore, nonlinear measurements carried out on a GaN HEMT validate our analytical results.

Yamamoto, H., Kikuchi, K., Vadalà, V., Bosi, G., Raffo, A., Vannini, G. (2022). Analysis of Efficiency-Limiting Factors Resulting from Transistor Current Source on Class-F and Inverse Class-F Power Amplifiers. IEICE TRANSACTIONS ON ELECTRONICS, E105.C(10), 449-456 [10.1587/transele.2022MMI0003].

Analysis of Efficiency-Limiting Factors Resulting from Transistor Current Source on Class-F and Inverse Class-F Power Amplifiers

Vadalà Valeria;
2022

Abstract

This paper describes the efficiency-limiting factors resulting from transistor current source in the case of class-F and inverse class-F (F-1) operations under saturated region. We investigated the influence of knee voltage and gate-voltage clipping behaviors on drain efficiency as limiting factors for the current source. Numerical analysis using a simplified transistor model was carried out. As a result, we have demonstrated that the limiting factor for class-F-1 operation is the gate-diode conduction rather than knee voltage. On the other hand, class-F PA is restricted by the knee voltage effects. Furthermore, nonlinear measurements carried out on a GaN HEMT validate our analytical results.
Articolo in rivista - Articolo scientifico
harmonics; HEMTs; microwave amplifiers; waveform engineering;
English
449
456
8
Yamamoto, H., Kikuchi, K., Vadalà, V., Bosi, G., Raffo, A., Vannini, G. (2022). Analysis of Efficiency-Limiting Factors Resulting from Transistor Current Source on Class-F and Inverse Class-F Power Amplifiers. IEICE TRANSACTIONS ON ELECTRONICS, E105.C(10), 449-456 [10.1587/transele.2022MMI0003].
Yamamoto, H; Kikuchi, K; Vadalà, V; Bosi, G; Raffo, A; Vannini, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/397081
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