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Fig. 11 E-plane and H-plane radiation pattern at a 3.73 GHz, b 5.1 GHz
5 Conclusion
The proposed antenna is developed on 30 × 30 × 0.8 mm3 FR-4 Substrate and tested. The measured radiation characteristics are endorsed by simulations. The ELC resonator in the ring monopole antenna creates dual-band characteristics for WiMAX and WLAN applications. The proposed antenna demonstrates good radiation pattern for both E-plane and H-plane in the dual bands. The band characteristics of the proposed ELC metamaterial element are analysed by the classical waveguide theory to describe the negative permeability property of ELC metamaterial at 4.3 GHz due to stop band behaviour. The pass band characteristics are noticed for frequencies of 3.45 and 5 GHz. This is perceived that pass band exhibits where the antenna has revealed a new resonance frequency in the return loss characteristics.
Fig. 12 Gain plot of the proposed antenna
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Dual-band monopole antenna loaded with ELC metamaterial resonator for WiMAX and WLAN… |
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Fig. 13 Radiation efficiency of the proposed antenna
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