A novel PBG planar inverted-F antenna for wearable system

In this paper, a novel PBG planar inverted-F antenna (PIFA) is presented. The PBG structure which is stuck on the back of the Teflon substrate (epsilon(r) = 2.65) can suppress the surface waves effectively, the simulated impedance bandwidth of the novel PBG PIFA is 27.5% (1.984 GHz-2.621 GHz), increased 2.1% than that of the regular PIFA, and the resonant frequency is decreased at the same time. It can be proved that the size of the antenna is reduced 10.6%. The measured impedance bandwidth is 40%, and it shows that the novel PBG PIFA is more effective and useful. The simulated radiation patterns at the two principle planes of the novel PBG PIFA are narrower than that of the regular PIFA, so the performance of the antenna is improved. The novel PBG PIFA can be applied in some wireless communication systems such as the WLAN2.4 and Bluetooth wireless technology system etc.