Electromagnetic Behaviors of Thin Film CPW-Fed CSRR Loaded on UWB Transparent Antenna

The electromagnetic behavior of the coplanar waveguide (CPW)-fed loaded complementary split-ring resonator (CSRR) to the ultrawideband (UWB) transparent antenna is presented in this letter. The transparent material known as conductive silver-coated thin films (AgHT-4) is one of the unique materials that is now being implemented in antenna designs. This material has very unique advantages of very thin thickness and high transparency. However, it exhibits different electromagnetic properties compared to the conventional Fire Retardant-4 (FR-4) due to its surface resistivity and conductivity. Meanwhile, split-ring resonators (CSRRs) are one of the metamaterial artificial structures that are implemented in antenna design for their unique negative permittivity/permeability properties. CSRR will be designed using the transparent material to achieve bandstop filter properties centered at 5.8 GHz so as to reduce the interferences from wireless local area network (WLAN) and dedicated short-range communication (DSRC) applications. The characteristics of the SRRs/CSRRs when implemented on the high resistivity thin film is compared to those implemented using copper radiating element.