Title :
Third Order Intermodulation Improvement in Distributed Amplifiers
Author :
Aitchison, C.S. ; Mbabele, M.
Author_Institution :
Microwave Systems Research Group, School of Electronic Engineering, IT and Mathematics, University of Surrey, Guildford, GU2 7XH, UK. e-mail: c.aitchison@surrey.ac.uk
Abstract :
The paper considers the third order intermodulation behaviour of a distributed amplifier (with loss in gate and drain lines) in which the principle non linearity is due to gm and shows theoretically that in a two tone intermodulation test at constant output power, C/IM3 increases as the number of sections in the distributed amplifier is increased. A similar result is obtained by the simulation of a n stage distributed amplifier. An improvement in C/IM3 of about 25dB is obtained by increasing the number of stages in a distributed amplifier, with loss, from one to five.
Keywords :
Analytical models; Distributed amplifiers; Electronic equipment testing; Frequency; Linearity; Mathematics; Power amplifiers; Power generation; System testing; Voltage;
Conference_Titel :
Microwave Conference, 2001. 31st European
Conference_Location :
London, England
DOI :
10.1109/EUMA.2001.339118
