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Main Title: Efficient technique for ultra broadband, linear power amplifier design
Author(s): Sayed, Ahmed
Preis, Sebastian
Böck, Georg
Type: Article
Language Code: en
Abstract: In this paper, a 10 W ultra-broadband GaN power amplifier (PA) is designed, fabricated, and tested. The suggested design technique provides a more accurate starting point for matching network synthesis and better prediction of achievable circuit performance. A negative-image model was used to fit the extracted optimum impedances based on source-/load-pull technique and multi-section impedance matching networks were designed. The implemented amplifier presents an excellent broadband performance, resulting in a gain of 8.5 ± 0.5 dB, saturated output power of ≥10 W, and power added efficiency (PAE) of ≥23% over the whole bandwidth. The linearity performance has also been characterized. An output third-order intercept point (OIP3) of ≥45 dBm was extracted based on a two-tone measurement technique in the operating bandwidth with different frequency spacing values. The memory effect based on AM/AM and AM/PM conversions was also characterized using a modulated WiMAX signal of 10 MHz bandwidth at 5.8 GHz. Furthermore, a broadband Wilkinson combiner was designed for the same bandwidth with very low loss to extend the overall output power. Excellent agreement between simulated and measured PA performances was also achieved.
Issue Date: 2012
Date Available: 12-Feb-2018
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Subject(s): power amplifiers and linearizers
circuit design and applications
Journal Title: International journal of microwave and wireless technologies
Publisher: Cambridge University Press
Publisher Place: Cambridge
Volume: 4
Issue: 6
Publisher DOI: 10.1017/s1759078712000578
Page Start: 559
Page End: 567
EISSN: 1759-0795
ISSN: 1759-0787
Notes: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
Appears in Collections:FG Mikrowellentechnik » Publications

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