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Minimization in variations of different parameters in different φ planes of a small-size concentric ring array antenna using firefly algorithm

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Abstract

The radiation pattern of a small-size concentric ring array antenna does not remain φ-symmetric, if the array is made with an appreciably lesser number of antenna elements. The sidelobe level, first null beamwidth (FNBW), half-power beamwidth (HPBW), and the null depths of the radiation pattern change significantly in different φ planes. An efficient pattern synthesis method has been developed in this work to reduce the variation of sidelobe level, FNBW, and HPBW of a small-size concentric ring array of isotropic antennas, for different φ cuts. It is done by finding out an optimum set of amplitude distribution of the array elements using firefly algorithm. The sidelobe level and the first null depth of the array are kept below a desired value for all the defined φ cuts. The directivity of the optimized array and the uniform array has been computed. The variation of all these parameters for different φ cuts has been compared to the same array with uniform excitation among the elements.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, National Institute of Technology, Durgapur, India

    A. Chatterjee & G. K. Mahanti

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  1. A. Chatterjee
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  2. G. K. Mahanti
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Correspondence to G. K. Mahanti.

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Chatterjee, A., Mahanti, G.K. Minimization in variations of different parameters in different φ planes of a small-size concentric ring array antenna using firefly algorithm. Ann. Telecommun. 68, 299–306 (2013). https://doi.org/10.1007/s12243-012-0323-x

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  • DOI: https://doi.org/10.1007/s12243-012-0323-x

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