Design and analysis of omega shaped slotted multiband antenna

Abstract

An omega shaped slotted multiband antenna is designed to operate over different frequencies. It is designed with FR4 substrate having thickness 1.6mm. In the first design a simple omega shaped slot is formed in the rectangular patch antenna. In the second design, L shaped slot is inserted in the ground plane and width is increased. Third design focused on introducing a circle in the middle of the patch and C shaped slot inside omega to increase multiband operation. A smaller circle is made in the corner of the patch in the fourth design to slightly improve the gain of the antenna. This antenna resonates to four different frequencies with three stop band frequencies. The multiband antenna resonates for the frequencies 4.125, 5.093, 7.042 and 9.031 GHz and notch frequencies at 2.734, 4.888, 7.8 to 8.5 GHz. The efficiency is reaching 100% for few frequencies. The antenna is suitable for WiFi and Wimax and X band applications. ADS software is used for designing the antenna.