Dual frequency rectangular microstrip antena

Abstract

The research in wireless communication has spurred the development of extra ordinary range of antennas, each with its own advantage and limitations. In today’s modern communication industry, antennas are the most important components required to create a communication link. Microstrip antennas are an urgent need for aerospace and mobile applications because of their low profile, light weight, flexibility to efficiently combine the capabilities of multiple antennas and low power handling capacity. Conventional Microstrip patch antennas has some drawbacks of low efficiency, narrow bandwidth of the central frequency, its bandwidth is limited to a few percent which is not enough for most of the wireless communication systems nowadays. The project provides a detailed study of the design of coaxial-fed Rectangular Microstrip Patch Antenna to facilitate dual polarized, dual band operation. The design parameters of the antenna have been calculated using the transmission line model and the cavity model. For the simulation process HFSS (High Frequency Structural Simulator) which is electromagnetic software based on finite element method (FEM) has been used. The effect of antenna dimensions and substrate parameters on the performance of antenna have been discussed. The antenna has been designed with embedded spur lines and integrated reactive loading for dual band operation with better impedance matching. The designed antenna can be operated at two frequency band with centre frequencies 2.44 GHz (Bluetooth) and 5.5 GHz (Wi-Fi). So the dual band and dual frequency operation has successfully incorporated into a single patch.