Design & Analysis of a Micro-strip Patch Antenna for RFID, WiMAX and X-band Applications

This work deals with the design and simulation of patch antenna that provides resonance at frequency 9.968 GHz and applicable for RFID, WiMAX, and X-band applications. The antenna has a -10 dB impedance bandwidth of 300 MHz ranging from 9.8 GHz to 10.1 GHz. The prospect of this design is to obtain a small size, light weight and low-cost miniaturized antenna with good antenna characteristics and ease of integration using feed-networks. The basic theory and design are analyzed, and the simulation results are obtained using computer simulation technology (CST) Microwave Studio. The proposed antenna provides excellent VSWR of 1.208 and a gain of 5.960 dB. The simulated directivity, return loss (S11) and radiation efficiency are 6.015 dBi, -20.49 dB and 98.14% respectively. The simulation and PCB design of the proposed antenna are carried out using FR4 (lossy) substrate. The experimental radiation pattern is investigated using wave and antenna training system (WATS 2002) module. Finally, the simulated radiation pattern is compared with the experimental one.