15% bandwidth 7 GHz GaN‐MMIC Doherty amplifier with enhanced auxiliary chain. Issue 2 (February 2014)

• Record Type: Journal Article
• Authors: Piazzon, Luca; Colantonio, Paolo; Giannini, Franco; Giofré, Rocco
• Is Part Of: Microwave and optical technology letters. Volume 56:Issue 2(2014:Feb.)
• Page Start: 502
• Page End: 504
• Publication Date: 2014-02
• Subjects: Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.28108
• Languages: English
• ISSNs: 0895-2477

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>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. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:502–504, 2014</p> </abstract>