A further study of planar inverted-F antenna

This paper represents a simulated and experimental study of the planar inverted-F antenna (PIFA). It involves the changes in different parameters to observe their effects on the antenna characteristics such as the resonant frequency, impedance bandwidth and radiation pattern. It is found that the characteristics are affected by a number of parameters which include dimensions of ground plane, length, width and height of top plate, widths of shorting and feeding plates. The characterictics are also affected by the horizontal distance between shorting and feeding plates, the position of feeding plate under the top plate, the distance of shorting plate from one edge of top plate and the distance of PIFA structure from horizontal and vertical edges of ground plane. Taking these variables into account, a new empirical formula is proposed. These results will be very helpful in designing PIFA.