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 10 dB 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 2.4 GHz 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.