Title :
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
fDate :
3/1/1998 12:00:00 AM
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;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
