**Example Overview**Calculate the input reflection coefficient and circular components of a left-handed circular polarised GPS patch antenna on a finite substrate close to 1.57 GHz.

**Topics Discussed in Example**Before starting this example, check if the topics discussed in this example are relevant to the intended application and experience level.

**Example Prerequisites**Before starting this example, ensure that the system satisfies the minimum requirements.

**Creating the Model in CADFEKO**Create the model geometry using the CAD component, CADFEKO.

**Launching the Solver**Launch the Solver to calculate the results. No requests were added to this model since impedance and current information are calculated automatically for all voltage and current sources in the model.

**Viewing the Results in POSTFEKO**Display the model as well as the results using the post-processor component, POSTFEKO.

**Final Remarks**This example showed the construction, configuration and solution of a left-handed circular polarised GPS patch antenna on a finite substrate.