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PROPOSING A CRISS-CROSS METAMATERIAL STRUCTURE FOR IMPROVEMENT OF PERFORMANCE PARAMETERS OF MICROSTRIP ANTENNAS

By K. Inamdar, Y. P. Kosta, and S. Patnaik

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Abstract:
In this paper, we present the design of a metamaterial based microstrip patch antenna, optimized for bandwidth and multiple frequency operations. A Criss-Cross structure has been proposed. This shape is inspired by the famous Jerusalem Cross. The theory and design formulas to calculate various parameters of the proposed antenna have been presented. The software analysis of the proposed unit cell structure has been validated experimentally thus giving negative response of ε and μ. Following this, a metamaterial-based-microstrip-patch-antenna is designed. A detailed comparative study is conducted exploring the response of the designed patch made of metamaterial and that of the conventional patch. Finally, antenna parameters such as gain, bandwidth, radiation pattern and multiple frequency responses are investigated and optimised and presented in tables and response-graphs. It is also observed that the physical dimension of the metamaterial based patch antenna is smaller than its conventional counterpart operating at the same fundamental frequency. The response of the patch antenna has also been verified experimentally. The challenging part was to develop metamaterial based on some signature structures and techniques that would offer advantage in terms of bandwidth and multiple frequency operation, which is demonstrated in this paper. The unique shape proposed in this paper gives improvement in bandwidth without reducing the gain of the antenna.

Citation:
K. Inamdar, Y. P. Kosta, and S. Patnaik, "Proposing a Criss-Cross Metamaterial Structure for Improvement of Performance Parameters of Microstrip Antennas," Progress In Electromagnetics Research C, Vol. 52, 145-152, 2014.
doi:10.2528/PIERC14022003

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