Title :
Modeling dispersion and radiation characteristics of conductor-backed CPW with finite ground width
Author :
Schnieder, Frank ; Tischler, Thorsten ; Heinrich, Wolfgang
Author_Institution :
Ferdinand-Braun-Inst. fur Hochfrequenztechnik, Berlin, Germany
fDate :
1/1/2003 12:00:00 AM
Abstract :
Dispersion and radiation properties of the conductor-backed coplanar waveguide (CPW) with finite ground planes are analyzed and modeled. A frequency-domain finite-difference method using the perfectly matched layer absorbing boundary condition is used as reference. Based on these results, a closed-form description is derived and implemented into an existing quasi-static CPW model. This leads to a comprehensive and efficient CPW description accounting for all relevant effects from conductor loss to high-frequency dispersion. Additionally, design rules to avoid parasitic radiation effects are given.
Keywords :
coplanar waveguides; dispersion (wave); eigenvalues and eigenfunctions; finite difference methods; frequency-domain analysis; losses; waveguide theory; closed-form description; conductor loss; conductor-backed CPW; dispersion characteristics; finite ground width; frequency-domain finite-difference method; high-frequency dispersion; parasitic radiation effects; perfectly matched layer absorbing boundary condition; quasi-static CPW model; radiation characteristics; Circuit synthesis; Conductors; Coplanar waveguides; Dielectric substrates; Dispersion; Finite difference methods; Frequency; MMICs; Perfectly matched layers; Radiation effects;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2002.806926
