U-Shape Slot Antenna Design with High-Strength Ni54Ti46 Alloy

In this paper, a compact, printed, capsule-U-shape ultra-high-strength Ni54Ti46 antenna that can be used in biomedical and communication applications is presented. An accurate electromagnetic model of the shape memory alloy antenna is developed using CST Studio for numerical analysis. The 10dB return loss bandwidth of the proposed Ni54Ti46 antenna is 8% GHz, which covers the recently proposed 802.11 and 802.15 applications. Radiation performance has been evaluated using FIT simulation to show that the proposed antenna can be used for ISM band telemetry applications. Ni54Ti46 U-shape antenna operating at 2.4GHz having 50 beamwidth and 6.96 dBi gain has been utilized as a reference antenna. The impedance bandwidth of the antenna has been enhanced from 4.2 to 8% by using aged Ni54Ti46 alloy. However, the conductivity increased after the aging process and antenna's return loss and frequency levels are shifted. In addition, it has been shown that Ni54Ti46 antenna significantly develops the radiation pattern. The computed and measured results showed good agreement for copper, aluminum and Ni54Ti46 antennas.