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Reduced and conventional size multi-band circular patch antennas loaded with metamaterials

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5 Author(s)
Ferdous, S. ; Dept. of Electr. & Electron. Eng., Bangladesh Univ. of Eng. & Technol. (BUET), Dhaka, Bangladesh ; Hossain, A. ; Chowdhury, S.M.H. ; Mahdy, M.R.C.
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In this study, a novel technique to achieve multi-band performance for both reduced and conventional size circular microstrip patch antennas loaded with metamaterial has been proposed. Incorporation of symmetric slotting concept with the concept of additional mode modification for both MNG (μ negative) and ENG (ε negative) metamaterial loaded circular patch antennas have been shown. The use of metamaterial creates an unconventional mode, whereas symmetrical slotting not only modifies another band but also improves the gain by around 1 dB of unconventional mode for MNG loaded antenna. Design algorithms for metamaterial loaded circular patch antennas have been developed to achieve size reduction and highly directive multiband property. Based on these design algorithms, at first a reduced size triple band circular patch antenna loaded with MNG metamaterial has been shown where around 35% size reduction is achievable. Later, a triple band conventional size circular patch antenna partially loaded with ENG metamaterial has been designed with high gain and directive performances for all three bands compared to previously reported such antennas.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:7 ,  Issue: 9 )