Title :
Design of a 100watt high-efficiency power amplifier for the 10-500MHz band
Author :
Cho, Jaeyong ; Lim, Kyunhoon ; You, SungChul ; Seo, Minchul ; Kim, Kyungwon ; Sim, Jaewoo ; Park, Myungkyu ; Yang, Youngoo
Author_Institution :
Sch. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea
Abstract :
This paper presents a design for a high-efficiency power amplifier with an output power of more than 100W, and an ultra-broad bandwidth from 10 to 500MHz. The amplifier has a 4-way push-pull configuration using Guanella´s 1:1 transmission line transformer. A negative feedback network is adopted to make the power gain flat enough over the operating bandwidth. The implemented power amplifier exhibits a power gain of 29.2±1.8dB from 10 to 500MHz band with its power-added efficiency (PAE) being greater than 43%, and the second-and third-harmonic distortions are below -29dBc and -9.78dBc, respectively, at an output power of 100W over the entire frequency band.
Keywords :
harmonic distortion; power amplifiers; 4-way push-pull configuration; frequency 10 MHz to 500 MHz; gain 27.4 dB to 31 dB; high-efficiency power amplifier; negative feedback network; power 100 W; power gain; power-added efficiency; second- and third-harmonic distortions; transmission line transformer; ultra-broad bandwidth; Bandwidth; Broadband amplifiers; Ferrites; Frequency; High power amplifiers; Impedance matching; Power amplifiers; Power generation; Power transmission lines; Transformer cores; Broadband power amplifier; feedback; push-pull; transmission line transformer;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385389
