W-shaped enhanced-bandwidth patch antenna for wireless communication |
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Authors: | Abbas Ali Lotfi Neyestanak Farrokh Hojjat Kashani Kasra Barkeshli |
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Affiliation: | (1) Islamic Azad University, Shahr_e_Rey Branch, Persian Gulf Highway, P.O. Box 18735-334, Tehran, Iran;(2) Iran University of Science and Technology, Farjam Street, Narmak, Tehran, Iran;(3) Electrical Engineering Department, Sharif University of Technology, Azadi Avenue, 11365-9363 Tehran, Iran |
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Abstract: | In this paper a novel form of the familiar E-shaped patch antenna is presented. In the presented approach, by using the genetic
algorithm (GA) based on fuzzy decision-making, some modifications have been implemented to the incorporated slots which lead
to even more enhancement in the antenna bandwidth. The MOM (Method of Moment) is employed for analysis at the frequency band
of 1.8GHz–2.6GHz by the optimization parameters of supply locations and slot dimensions. In the implemented fuzzy system,
inputs are parameters like population, and outputs are parameters like recombination to produce the next generation. Fuzzy
inference system (FIS) is used for the control of GA parameters. The design is also optimized by successive iterations of
a computer-aided analysis package and experimental modifications. Prototype antenna, resonating at wireless communication
frequencies of 1.88 and 2.37 GHz, has been constructed and experimental results are in relatively good agreement with the
analysis. Dimensions of the modified slots for bandwidth enhancement, while maintaining good radiation characteristics, have
been determined and the obtained antenna bandwidth of 36.7% is larger than that of a corresponding unslotted rectangular microstrip
antenna or a conventional E-Shaped patch antenna. Details of the antenna design approach and experimental results are presented
and discussed. |
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Keywords: | W-shaped antenna Fuzzy system Genetic algorithm Wideband patch antenna |
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