B10. Design of A Compact Tri-band Antenna for RFID Handheld Applications using Optimization Techniques

In this article, the hybrid approach involving Central Force Optimization and Nelder-Mead (CFO-NM) algorithm is considered to optimize a compact dual bow-tie slot antenna for 915/2450/5800 MHz triple band RFID applications. The size of the proposed antenna is determined by the upper resonant frequency, and thus it is compact in nature. The middle and lower operating frequencies are obtained by inserting metal strip pairs near the ends of the slotted dual bow-tie without increasing the overall antenna area. The CFO-NM algorithm program was implemented using MATLAB-software which linked to the CST Microwave studio software to simulate the antenna. In addition the optimized antenna is assessed using the Finite Difference Time Domain (FDTD) program written with MATLAB to validate the results. Finally, the performance of the designed antenna in the presence of the human-hand model is investigated in addition to evaluating the spatial peak specific absorption rate (SAR).