Hi all I am not able to understand the meaning of input impedance (edge) in this link em: talk - microstrip Patch Antenna calculator what must be its value for. VSWR Calculator, Voltage Standing Wave Ratio, Transmission Line Mismatch, Reflection Coefficient. emtalk, electromagnetics forum, electromagnetic tutorials, microwave engineering forum, microwave engineering tutorials, microstrip calculator. I don't think there is a calculator just for coupled wires. Basicly use an impedance calculator such as: How to design a microstirp dipole antenna Convert Pick either GAMMA, VSWR, or dB and enter its value. Follow the similar steps to calculate. Then you can transform the HFSS model to your software.