A Beam-Split and Gain-Enhanced Patch Antenna Using Metamaterial Superstrate for Wireless Communications
Abstract
This paper proposes multiband antenna-based Metamaterial for beam splitting and gains improvement. Here, the focus is on developing the smart antenna using a Metamaterial Superstrate technique for modern wireless applications. The proposed antenna consists of two patches, the first one has a square shape placed on a Taconic FR-30 substrate, followed by the second patch constructed as a meander ring with two stubs for increasing the generated frequency bands. At the end of the design process, the proposed patch seems U-shaped to ensure the antenna beam is splitting at the desired frequency bands. In addition, the capacitive coupling is used for exciting the second patch, whereas the first patch is excited by conduction with a 50 Ω discrete port. Furthermore, a metasurface layer is designed and mounted on the second patch as a superstrate to increase the antenna gain toward the bore-sight direction. The results show a maximum gain of 8 dBi at 4.2 GHz with maximum dimensions of 108 × 108 mm2. Moreover, this antenna operates at additional frequency bands (2.6 GHz, 4.2 GHz, and 5.6 GHz), with a minimum reflection coefficient of -16.8 dB, -12.3 dB, and -30.6 dB, respectively. The proposed antenna is designed and analyzed using the CST MWS simulator.
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