Title :
Demonstrator of Class-S Power Amplifier for base stations based on GaN technology
Author :
Samulak, Andrzej ; Fischer, Georg ; Weigel, Robert
Author_Institution :
Lehrstuhl fur Tech. Elektron., Friedrich-Alexander-Univ. Erlangen-Nurnberg, Erlangen
Abstract :
Demonstrator of a class-S power amplifier based on GaN transistors is presented. Input signal is generated externally in simulation tools (ADS, Matlab) based on a 4th order Bandpass Delta-Sigma modulator definition and a FPGA board is used as a signal source. The demonstrator is based on a Current Switching Class D (CSCD) topology. The presented solution offers an output power of at least 37 dBm (dependending on the supply voltage). Module efficiency is 20% (30% drain efficiency respectively) for full scale 3 GPP Delta-Sigma input signal. Center frequency is set to 225 MHz, with the posibility of increase for the purpose of analysis and measurements.
Keywords :
band-pass filters; field programmable gate arrays; gallium compounds; modulators; network topology; power amplifiers; 3GPP Delta-Sigma input signal; FPGA; GaN transistors; bandpass Delta-Sigma modulator; class-S power amplifier; current switching class D topology; frequency 255 MHz; Base stations; Delta modulation; Field programmable gate arrays; Frequency; Gallium nitride; Power amplifiers; Power generation; Signal generators; Topology; Voltage;
Conference_Titel :
Microwaves, Radar and Wireless Communications, 2008. MIKON 2008. 17th International Conference on
Conference_Location :
Wroclaw
Print_ISBN :
978-83-906662-8-0
