Gain and directivity enhancement of microstrip patch array antenna with metallic ring for WLAN/Wi-Fi applications

A novel gain and directivity enhancement of microstrip patch array antenna with metallic ring is presented here for WLAN/Wi-Fi application. U-slot technique is used to achieve the necessary impedance transformation at preferred frequency. The designs have array and metallic ring coplanar to radiation patch to enhance the gain. The topology of the structure is dissimilar from conventional microstrip patch antenna. The structure present on the Rogers RO 4003; Using CST Microwave studio is designed & simulated. The simulated return loss is greater than 10 dB at center frequencies 5.9 GHz and 5.96 GHz. The results of microstrip patch antenna with array and metallic ring are simulated. In that microstrip patch antenna array design the improvement to gain and directivity of microstrip patch antenna with reference to 150% dB and 157.89% dBi frequencies as compared to conventional one. Using metallic ring around the patch on dielectric substrate realize gain enhancement and improved return loss. The substrate height is 1.3 mm and dielectric constant is 6.15.