Abstract
A compact coplanar waveguide (CPW) fed dual band antenna is designed by metamaterial inspired Split ring resonator. The radiating element Hexagonal Closed Ring Resonator (Hex-CRR) and a Non Bianisotropic split-ring resonator (NB-SRR) are connected together. The overall antenna dimension is 31.7 × 25 × 1.6 mm3. The prototype antenna covers bandwidth of 36 MHz (2.677-2.713 GHz) and 2057 MHz (5.513-7.57 GHz) with center frequency of 2.7 GHz and 6 GHz, respectively. In order to improve the impedance matching of the antenna, CPW-fed line with tapered impedance transformer line and sunk in the ground plane are introduced. Hex-CRR is used to create a lower frequency band and NB-SRR offers higher frequency band. To miniaturize the size of the antenna, inner NB-SRR dimensions are taken as smaller than the resonant wavelength. The prototype antenna has consistent Omnidirectional (H-Plane) radiation pattern, and dipole (E-Plane) radiation pattern of both resonant frequencies.
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