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—Today, wireless communication systems always require an antenna with broadband capability, high gain and efficiency, which are especially important in satellite communications. With advantages, such as high gain and wide bandwidth, an array antenna is often used in many different applications. A compact array antenna of 4 x 4 elements using a novel metamaterial structure is proposed in this paper. The array antenna consists of 16 patch elements and a novel metamaterial structure. By using the metamaterial structure on the ground plane, the bandwidth and gain of the array antenna are significantly improved. The array antenna was constructed on Roger4350B with a thickness of 1.524 mm, εr = 3.66 and tanδ = 0.0037 over the frequency range from 7.9 to 8.4 GHz. The antenna displays a large bandwidth of approximately 13.5%, a high gain over 11.2 dBi and an efficiency of 87%. The experimental results were compared to those obtained in a simulation to verify the performance of the proposed array antenna.

Gain and Bandwidth Enhacement of Array Antenna Using Novel Metamaterial Structure