Analytical analyses of v, elliptic, and circular-shaped microshield transmission lines

Author

Yuan, Naichang ; Ruan, Chengli ; Lin, Weigan

Author_Institution

Inst. of Appl. Phys., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

42

Issue

5

fYear

1994

fDate

5/1/1994 12:00:00 AM

Firstpage

855

Lastpage

859

Abstract

Several new types of monolithic coplanar transmission lines, v, elliptic, and circular-shaped microshield coplanar waveguide, have been proposed. The characteristic impedance expressions for those transmission lines have been derived using the conformal mapping method (CMM) under the assumption of the pure-TEM propagation and zero dispersion. In the analyses of the elliptic and the circular-shaped microshield coplanar lines, the methods using the graphical approximation and taking the geometric mean value of the upper and the lower bounds to the size of the line are put forward to calculate the characteristic impedance of this two kinds of microshield coplanar lines. The numerical results show the effects of the different shaped microshield walls on characteristic impedances

Keywords

circular waveguides; electric impedance; microstrip lines; waveguide theory; characteristic impedance; circular-shaped microshield coplanar waveguide; conformal mapping method; elliptic coplanar waveguide; geometric mean value; graphical approximation; microshield coplanar lines; monolithic coplanar transmission lines; numerical results; pure-TEM propagation; v-shaped microshield transmission lines; zero dispersion; Capacitance; Conformal mapping; Coordinate measuring machines; Coplanar transmission lines; Coplanar waveguides; Impedance; Magnetic analysis; Microstrip; Planar transmission lines; Transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.293535

Filename

293535