Design of Z-Shape Microstrip Antenna with I- Slot for Wi-Max/Satellite Application

In current scenario, the demand in wireless communication increases rapidly. As the growth of the technology increases, in the same way the antenna research requires in high rate. Mostly the patch antenna creates the focus of the researchers. Multiband but single feed microstrip antenna has been proposed in this work. It is of Z-shape with I-slot antenna that operates at 3.5 GHz and 4.3 GHz which can be used for Wi-Max/S-band &C-band satellite applications. As the radiating edges of the antenna are cut by the slot, the multiple frequency response is generated. In this Z-shape antenna I-slot has been created on the radiating edge for which dual frequency response is achieved. The return losses at 3.5 GHz and 4.3 GHz are -18.88 dB and -16.42 dB respectively. Its bandwidth is of 140.7 MHz (lower band) to 131.5 MHz (upper band). A pair of slits has been inserted in the radiating edge to form Z-shape patch antenna and improved the performance. The proposed antenna designed in this paper exhibits enhanced bandwidth with multi resonant frequency. In this work, a geometric Z-shape is developed from a rectangular patch of width (W = 38.04 mm) and length (L = 29.44 mm). The antenna is designed using FR4-epoxy substrate with a dielectric constant ( of 4.4 and a thickness of 1.6 mm respectively. The result of proposed antenna is obtained in terms of return loss and bandwidth. Its radiation patterns are also studied. The simulated result shows that the Z-shape patch antenna with I-slot has the highest bandwidth in comparison with patch and Z-shape.