Title :
New empirical unified dispersion model for shielded-, suspended-, and composite-substrate microstrip line for microwave and mm-wave applications
Author :
Verma, A.K. ; Kumar, Raj
Author_Institution :
Dept. of Electron. Sci., Delhi Univ., India
fDate :
8/1/1998 12:00:00 AM
Abstract :
By introducing the concept of “virtual relative permittivity,” this paper reports several closed-form dispersion models for a multilayered shielded/unshielded microstrip line over 1<εr⩽20, 0.1⩽(w/h)⩽10, (h3/h)⩾2 in the frequency range up to 4 GHz.cm. The maximum deviation of the one model against the results of the spectral-domain analysis (SDA) is limited to 3%, while for the other three models, the maximum deviation is <2% and the root-mean-square (rms) deviation is <0.8%. This paper also reports improvement in the closed-form model of March for the determination of εeff(O) of the shielded microstrip line
Keywords :
dispersion (wave); electromagnetic shielding; microstrip lines; permittivity; spectral-domain analysis; substrates; transmission line theory; MM-wave application; composite substrate; dispersion model; microwave application; multilayered microstrip line; shielded substrate; spectral domain analysis; suspended substrate; virtual relative permittivity; Closed-form solution; Degradation; Filling; Frequency; Microstrip; Nonhomogeneous media; Permittivity; Reactive power;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
