2.30 GHz–2.50 GHz application of Bismuth Titanate (BIT) array antenna

The superior ferroelectric properties of Bi₄Ti₃O₁₂ (BIT) among bismuth-layer-structured ferroelectric compounds have attracted intense interest, making these structure some of the most competitive candidates for piezoelectric devices against lead containing materials. This paper presents the utilizing of ferroelectric material on antenna application. Ferroelectric that had been used on the proposed antennas was Bismuth Titanate (BIT), suitable for access points operating in the WLAN IEEE 802.11 b/g and WiMAX IEEE 802.16 within the range of 2.3 GHz to 2.5 GHz application. Bismuth Titanate (BIT), which had been tested to own a dielectric constant of ε_r = 20 and is in rectangular shaped. The influence of various parameters on antenna characteristics were investigated extensively using commercial electromagnetic simulations software by Computer Simulation Technology (CST). From both simulation and measurement results, it was found that BIT used have not only improved the directive emission but also enhanced the radiation efficiency. This work also demonstrates that the dielectric medium in use was able to apply for more compact planar and array antennas.