A fast and efficient FDTD algorithm for the analysis of planar microstrip discontinuities by using a simple source excitation scheme

Author

Zhao, An Ping ; Räisänen, Antti V. ; Cvetkovic, Srba R.

Author_Institution

Radio Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

5

Issue

10

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

341

Lastpage

343

Abstract

A fast solution FDTD algorithm with a simple and efficient excitation scheme for the analysis of microstrip circuits is introduced. In this algorithm, the source plane is located several nodes inside the near-end terminal plane and absorbing boundary conditions (ABC´s) can be applied on the terminal plane directly, without any special treatment. In addition, with this excitation scheme, no dc source distortions are induced on the source plane and nearby. Consequently, the terminal plane can be moved very close to the discontinuity, even at one-cell beyond the input/output reference planes. Hence, very significant computational savings can be achieved. To demonstrate the validity and efficiency of this algorithm, numerical results for a typical discontinuous microstrip structure are given and compared with those obtained by the conventional FDTD method

Keywords

finite difference time-domain analysis; microstrip discontinuities; planar waveguides; waveguide theory; FDTD algorithm; absorbing boundary conditions; computation; microstrip circuits; planar microstrip discontinuities; source excitation; source plane; terminal plane; Algorithm design and analysis; Boundary conditions; Circuit analysis; Conductivity; Finite difference methods; Laboratories; Magnetic separation; Microstrip; Numerical models; Time domain analysis;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.465043

Filename

465043