Abstract
The problem of surface waves usually degrades the performance of planar circuits and antennas, to reduce its effects, the electromagnetic band gap (EBG) structures are applied to suppress these undesired waves at certain bands. In this paper a novel multi band planar structure is simulated using finite difference time domain where the eigen frequencies are captured using the generalized pencil of function (GPOF) technique. By plotting the dispersion diagram of the structure, a surface wave propagation at 1.92-3.05GHz, 3.77-4.48GHz and 4.65-5.78GHz bands is prohibited, thus making the proposed structure suitable for WLAN requirements.