A simplified normalization FDTD formula and its application to VIP combline bandpass filters

Author

Zhao, Chuan-Dong

Author_Institution

Dept. of Electr. & Electron. Eng., Yamaguchi Univ., Japan

Volume

8

Issue

3

fYear

1998

fDate

3/1/1998 12:00:00 AM

Firstpage

118

Lastpage

120

Abstract

In this work new studies on the normalized finite-difference time-domain (FDTD) formula show that its time-domain iteration is done with an expanded dimension. A simple formula is derived to show the resulting variations in the frequency domain. A practical application to the vertical installed planar (VIP) BPF is given, a novel improvement to which includes applying planar fins and fine through-holes to reduce the requirement on an ideal ground circuit. The excellent properties of the modified combline BPF have been shown by the FDTD design as well as the measured ones

Keywords

band-pass filters; finite difference time-domain analysis; microstrip filters; microwave filters; passive filters; combline bandpass filters; finite-difference time-domain formula; normalization FDTD formula; planar fins; through-holes; time-domain iteration; vertical installed planar filter; Band pass filters; Circuits; Difference equations; Discrete Fourier transforms; Finite difference methods; Frequency; Maxwell equations; Microstrip; Patch antennas; Time domain analysis;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.661134

Filename

661134