Title :
CPW two-stage balanced monolithic 15 GHz amplifier using reduced-size branchline couplers
Author :
Gillick, Matthew ; Robertson, Ian D. ; Joshi, Jai S.
Author_Institution :
Communications Research Group Department of Electronic and Electrical Engineering King´´s College, University of London Strand, London, UK, WC2R 2LS
Abstract :
A two-stage balanced coplanar waveguide (CPW) 15 GHz amplifier design is presented which uses reduced-size branchline couplers. Impedance transformation is introduced in to the coupler to reduce the complexity of the devices matching networks. The amplifier has a chip size of only 2mm × 1.7mm and exhibits a measured gain of 16 dB with less than ±0.1dB of ripple over the intended operating range of 14.75-15.25 GHz.
Keywords :
Capacitors; Conductors; Coplanar waveguides; Couplers; Distributed parameter circuits; Frequency; Impedance matching; MMICs; Power transmission lines; Semiconductor device measurement;
Conference_Titel :
Microwave Conference, 1993. 23rd European
Conference_Location :
Madrid, Spain
DOI :
10.1109/EUMA.1993.336697
