Modelling of Elevated Coplanar Waveguides for High Speed Digital Interconnects

In designing and manufacturing of high speed digital circuits it is important to develop a transmission line having characteristics of a higher phase velocity, higher impedance, low insertion loss. Elevated coplanar waveguide (ECPW) has been identified as the transmission line to achieve such characteristics. Mesh less based collocation method for analyzing the ECPW structure has been developed. The collocation method is a true mesh-less technique which scores the advantages of CPU time compared to conventional mesh methods. The Pertinent software code for implementation of analysis using collocation method has been written and implemented in Mat lab to estimate the quasi - static parameters such as characteristic impedance (Zo) and effective dielectric constant (epsiv_reff ) for various w/d ratios with CPU time of 216 sec. The RF performance of the equivalent circuit model results in a return loss of 20 dB at a frequency of 2.4 GHz.