Title :
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
fDate :
5/1/1994 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
