High-frequency characteristics of a via connection

The high-frequency characteristics of a via connection that connects two infinite microstrip lines on either side of a ground plane is examined. The assumption of infinite lines allows for a semi-analytical solution, where the lines are treated essentially in closed form. This results in an accurate solution that captures all of the physics of high-frequency wave excitation on the lines by the via. The scattering parameters of the via can be obtained from this solution, which account for radiation and high frequency effects such as leaky-wave excitation.