Complementary asymmetric split rings as a surface impedance transmission line

Abstract

This paper showcases the work done to create an alternative surface impedance transmission line implemented using a 3D tetrahedral meshing frequency eigenmode solver. The work was performed based on a complementary asymmetric split ring (CASR) unit cell to identify its resonance characteristic and relevant dispersion diagram at 5.9 GHz. By using this CASR singularly into a guided transmission line, electromagnetic energy coming from the source can be seen travel at its peak. Yet, the same CASR do not resonate well if its nearby region are placed with another smaller similar CASR dimensions. This can be solved by optimizing the unit cell to resonate at a wider bandgap and achieve a better dispersion diagram that do interfere with other modes The outcome of this approach can be well suited to act as an alternative electromagnetic shield or even a surface wave splitter.