This course provides an introduction to several basic and commonly used transmission lines. We will cover the basic characteristics of and design equations for coaxial cable, microstrip transmission line, parallel plate waveguide, and rectangular waveguides. In each case, we will look at the basic geometric skeleton of each structure, and then go through the specifics of supported modes, characteristic impedances and guided wave phase velocity. This course was created for Ansys Innovation Courses by Dr. Kathryn Leigh Smith, Assistant Professor, UNC-Charlotte, in partnership with Ansys.