This article presents a new design of multiband planar inverted-F antenna
with slotted ground plane and S-etched slot on the radiation patch. The proposed antenna is
optimized using an efficient global hybrid optimization method combining bacterial swarm
optimization and Nelder-Mead (BSO-NM) algorithm to cover a very important six service
bands including GSM900, GPS1575, DCS1800, PCS1900, ISM2450, and 4G5000 MHz with
enhanced bandwidths. The BSO-NM algorithm in Matlab code is linked to the CST Microwave
studio software to simulate the antenna. To validate the results, the antenna is analyzed
using the finite difference time domain (FDTD) method. A good agreement is achieved
between the results of EM simulation and that produced from the FDTD method.