Title :
Design principles for modeling and simulations of microwave circuits
Author :
Grama, Alin ; Hurgoi, Florin ; Chindris, Gabriel ; Pop, Ovidiu
Author_Institution :
Dept. Appl. Electron., Tech. Univ. Cluj-Napoca, Romania
Abstract :
It has often proven difficult to simulate microwave and RF circuits accurately. This paper presents an easy method for modeling and simulation of nonlinear active microwave circuits using the Ansoft Serenade 8.0 Design Environment. Starting with some simple circuits (MESFET mixer circuits, GaAs BJT feedback microwave amplifier), the authors describe the main principles of simulating RF and microwave circuits and a new method for modeling active RF devices (such as MESFETs and GaAs BJTs) in order to obtain the best results for multitone nonlinear analysis. The new proposed method also covers the stability problems, based on the Nyquist stability criteria, and the matching impedance Smith plots of the RF circuits
Keywords :
MESFET circuits; Nyquist criterion; Nyquist stability; bipolar transistor circuits; circuit CAD; circuit simulation; feedback amplifiers; impedance matching; microwave amplifiers; microwave circuits; microwave mixers; nonlinear network analysis; Ansoft Serenade 8.0 Design Environment; GaAs; GaAs BJT feedback microwave amplifier; GaAs BJTs; MESFET mixer circuits; MESFETs; Nyquist stability criteria; RF circuit matching impedance Smith plots; RF circuits; active RF devices; design principles; microwave circuits; modeling; multitone nonlinear analysis; nonlinear active microwave circuits; simulation; stability problems; Circuit simulation; Feedback circuits; Gallium arsenide; MESFET circuits; Microwave amplifiers; Microwave circuits; Microwave devices; Microwave theory and techniques; Radio frequency; Stability criteria;
Conference_Titel :
Electronics Technology: Concurrent Engineering in Electronic Packaging, 2001. 24th International Spring Seminar on
Conference_Location :
Calimanesti-Caciulata
Print_ISBN :
0-7803-7111-9
DOI :
10.1109/ISSE.2001.931023
