Title :
Simulation of an elevated coplanar waveguide using 2-D FDTD
Author :
Hofschen, S. ; Wolff, I.
Author_Institution :
Dept. of Electr. Eng., Gerhard Mercator Univ., Duisburg, Germany
fDate :
1/1/1996 12:00:00 AM
Abstract :
Nonlinear transmission lines (NLTLs) are commonly used together with sampling circuits for millimeter-wave instruments. Recently, the use of an elevated coplanar waveguide (CPW) has been proposed to increase the bandwidth of sampling circuits. A full-wave analysis between 10 and 500 GHz of such an elevated CPW using 2-D FDTD is presented. The influence of the elevation heights on the capacitance and the loss behavior of the transmission line is discussed. The analysis shows that the distributed capacitance of the elevated CPW is four times lower and, the losses are at least divided by two in comparison to a normal CPW at 300 GHz
Keywords :
capacitance; coplanar waveguides; current distribution; electromagnetic wave propagation; finite difference time-domain analysis; losses; waveguide theory; 10 to 500 GHz; 2D FDTD; bandwidth; current distribution; distributed capacitance; effective dielectric constant; elevated coplanar waveguide simulation; elevation heights; full-wave analysis; loss behavior; millimeter-wave instruments; nonlinear transmission lines; sampling circuits; Capacitance; Circuit simulation; Coplanar transmission lines; Coplanar waveguides; Distributed parameter circuits; Finite difference methods; Instruments; Millimeter wave circuits; Sampling methods; Time domain analysis;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
