Title :
Modal dispersion control and distortion suppression of picosecond pulses in suspended coplanar waveguides
Author :
Qian, Yongxi ; Yamashita, Eikichi ; Atsuki, Kazuhiko
Author_Institution :
Dept. of Electron. Eng., Univ. of Electro-Commun., Tokyo, Japan
fDate :
10/1/1992 12:00:00 AM
Abstract :
The propagation and dispersion characteristics of picosecond electrical pulses in a suspended coplanar waveguide (SCPW) are investigated, and it is shown that the SCPW is a very promising transmission structure for ultrashort pulses. Numerical results for the modal dispersion of the SCPW are presented and compared to those of the conventional CPW, and a field-coupling theory is used to explain the evolution in the dispersion behavior. An evaluation based on the numerical analysis shows that a SCPW with properly controlled dispersion can exhibit a five times improvement in pulse transmission capability compared to the conventional CPW. Both computer simulations and experimental measurements show a substantial suppression in pulse distortion as well, compared to conventional CPWs
Keywords :
dispersion (wave); electric distortion; strip lines; waveguides; CPW; computer simulations; dispersion characteristics; distortion suppression; field-coupling theory; modal dispersion; picosecond electrical pulses; propagation characteristics; pulse transmission capability; suspended coplanar waveguides; ultrashort pulses; Coplanar transmission lines; Coplanar waveguides; Dispersion; Distributed parameter circuits; Frequency; Millimeter wave technology; Optical pulses; Pulse measurements; Superconducting transmission lines; Transmission line theory;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
