A High Gain and Multiband Patch Antenna with Semi Fractal Structure

摘要

In the present paper, a high gain and multiband patch antenna with semi fractal structure is designed. The patch antenna owns a hexagonal shape with the longest diagonal being 52.99mm. At the edge of the patch, an angle was cut to adjust the input impedance characteristics of the antenna as well as minimize its radiation size. We employ the FDTD method to calculate its radiation properties. Results show that the radiation gain can reach 6.95dBi at 2.45GHz with a good radiation pattern, which manifests itself a great potential application in radio frequency identification (RFID) industry.