Miniaturization of microstrip fractal H-Shape patch antenna using stack configuration for wireless applications

Abstract

A novel technique for miniaturization of microstrip patch antenna is proposed for Portable and multifunctional Communication systems. Our proposed design consists of fractal patch, H-Shape slot on fractal patch with first iteration and combination of L-Shape and U-Shape slots on the Ground plane. In this way we get smaller size antenna which is smaller than the conventional antenna. The most interesting feature of our proposed design is that we are getting multiband response in the frequency range of 1-8GHZ having Directivity in the range of 4.37dBi-5.31dBi, Gain in the range of 2.12dB-3.87dB and good impedance bandwidth for desired bands. As we have used the fractal patch with substrate in which substrate is FR4. Co-axial cable is used as a feeding method. We also employed shorting pin between fractal patch and ground plane. By the combination of all these proposed technique size of antenna is reduced 66.50% and it produces multiband response while the impedance bandwidth and gain are satisfactory for each band. We can adjust different bands by changing position of shorting pin. This type of smaller size antenna has applications in mobile phone for Wi-Fi, WALAN, Wi-Max, Bluetooth, C-band, S-band, ZigBee and also for other wireless applications.