A global finite-element time-domain analysis of active nonlinear microwave circuits

Author

Chang, Sung-Hsien ; Coccioli, Roberto ; Qian, Yongxi ; Itoh, Tatsuo

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

47

Issue

12

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

2410

Lastpage

2416

Abstract

An extension of the finite-element time-domain (FETD) method for mixed electromagnetic and circuit simulation of complex active microwave circuits is proposed in this paper. The passive distributed part of the circuit is analyzed using FETD and its interaction with lumped passive/active linear/nonlinear components is modeled via an equivalent-current generator whose value and internal capacitive admittance are computed at each time step by the FETD solver. Benchmark tests on a microwave amplifier and a injection-locked oscillator indicate that this extended FETD is not only superior in mesh flexibility, but also gives more accurate results than the similar FDTD-based algorithm

Keywords

MMIC; active networks; circuit simulation; equivalent circuits; finite element analysis; injection locked oscillators; microwave amplifiers; microwave circuits; microwave oscillators; nonlinear network analysis; time-domain analysis; FETD method; active nonlinear microwave circuits; equivalent-current generator; finite-element time-domain analysis; global FE time-domain analysis; injection-locked oscillator; internal capacitive admittance; mesh flexibility; microwave amplifier; mixed electromagnetic and circuit simulation; passive distributed part; Admittance; Benchmark testing; Circuit analysis; Circuit analysis computing; Circuit simulation; Distributed computing; Finite element methods; Microwave circuits; Microwave theory and techniques; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.808988

Filename

808988