This contribution presents the development and characterization of a GaN Doherty power amplifier for backhaul microwave links in the 6.35–7.35 GHz frequency range. To minimize the AM/AM distortion, a driver stage is integrated in the auxiliary branch. Such feature also allows to obtain a higher overall gain than the standard approach. Moreover, to enlarge the bandwidth a coupled lines directional coupler is adopted at the input to split the power to the two branches. Experimental characterization showed 10.5 dB Gain, 38.1 dBm saturated output power, 42% efficiency at 7 dB output back-off, and 15% bandwidth at 1 dB gain ripple.

Piazzon, L., Colantonio, P., Giannini, F., & Giofré, R. (2014). 15% bandwidth 7 GHz GaN-MMIC Doherty amplifier with enhanced auxiliary chain. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 56(2), 502-504 [10.1002/mop.28108].

15% bandwidth 7 GHz GaN-MMIC Doherty amplifier with enhanced auxiliary chain

PIAZZON, LUCA;COLANTONIO, PAOLO;GIANNINI, FRANCO;GIOFRE', ROCCO
2014-02

Abstract

This contribution presents the development and characterization of a GaN Doherty power amplifier for backhaul microwave links in the 6.35–7.35 GHz frequency range. To minimize the AM/AM distortion, a driver stage is integrated in the auxiliary branch. Such feature also allows to obtain a higher overall gain than the standard approach. Moreover, to enlarge the bandwidth a coupled lines directional coupler is adopted at the input to split the power to the two branches. Experimental characterization showed 10.5 dB Gain, 38.1 dBm saturated output power, 42% efficiency at 7 dB output back-off, and 15% bandwidth at 1 dB gain ripple.
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Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-INF/01 - Elettronica
English
Piazzon, L., Colantonio, P., Giannini, F., & Giofré, R. (2014). 15% bandwidth 7 GHz GaN-MMIC Doherty amplifier with enhanced auxiliary chain. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 56(2), 502-504 [10.1002/mop.28108].
Piazzon, L; Colantonio, P; Giannini, F; Giofre', R
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/83133
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