AN 958: Board Design Guidelines

ID 683073
Date 6/26/2023
Document Table of Contents Simple Coplanar Wave Guide

The simple coplanar wave guide, shown in Figure 79, is used primarily in microwave systems. This structure does not require vias, and you can easily mount passive or active devices in the signal path, resulting in a low-loss, high-speed transmission line. The simple coplanar wave guide requires that the substrate thickness (H) be “infinite,” so that the fields remain outside the dielectric. You cannot use this structure on multilayer boards because it cannot have a second layer.

Figure 79. Simple Coplanar Wave Guide