Multiband Optically Transparent Antenna from Indium Zinc Tin Oxide Thin Films with Half-Circular Shaped

A multi-band optically transparent antenna based on indium zinc tin oxide (IZTO) was investigated. A half circular-shaped structure (HC-S) was used to produce multi-band frequencies. The IZTO's antenna was deposited on a glass substrate that has relative permittivity $\varepsilon_{r2}$ , substrate thickness H2, and loss tangent tan δ2 of 2.3, 0.8 mm, and 0.028, respectively. The IZTO antenna has patch thickness (h 2 ) of 100 μmand it was simulated using Momentum simulation in Advanced Design System (ADS). The results show that the antenna is capable of working in multi-band at 12.0 GHz, 15.5 GHz, 17.9 GHz, with a bandwidth of 0.5 GHz, 1.4 GHz, 1.5 GHz, and gain of 2.33 dBi, - 3.15 dBi, -0.56 dBi, respectively. This antenna has slightly lower performance compared to the antenna with the copper patch. However, it has the advantage of > 85% transparency well as able to work in multi-band operating frequencies.