Title :
Optimum combination of series and parallel immittances for broadband lossy match amplifier
Author :
Koo, Kyung Heon ; Lee, Choong Woong
Author_Institution :
Dept. of Electron. Eng., Incheon Univ., South Korea
Abstract :
A systematic design method is proposed for the broadband lossy match amplifier. This method models a lossy matching network as the combination of a series impedance and a parallel admittance. Some new immittance circles have been derived on the Smith chart to obtain the optimum combination of the series and parallel immittances. Using the proposed method, design examples of ultra-broadband amplifiers operating from DC to 12 GHz frequency range are presented
Keywords :
impedance matching; microwave amplifiers; network synthesis; solid-state microwave circuits; wideband amplifiers; 0 to 12 GHz; SHF; Smith chart; broadband; design method; gain; immittance circles; interstage network; lossy match amplifier; lossy matching network; optimum combination; parallel admittance; parallel immittances; reflection coefficients; series impedance; Admittance; Broadband amplifiers; Circuits; Impedance matching; Lagrangian functions; Microwave amplifiers; Microwave transistors; Reflection; Scattering parameters; Tin;
Conference_Titel :
Circuits and Systems, 1991. Conference Proceedings, China., 1991 International Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CICCAS.1991.184395
