Analysis Equations for Shielded Suspended Substrate Microstrip Line and Broadside-Coupled Stripline

Simple and closed-form equations for analysis of shielded suspended substrate microstrip line (SSL) and Broadside-coupled stripline (BSCL) are presented, valid over a practical application range of structural parameters and substrate dielectric constant. Comparing with the values obtained using finite-differential method, the accuracy is found to be within +-2% (w