volume | PIER Journals

2006-11-19

Optimum Normalized-Gaussian Tapering Window for Side Lobe Reduction in Uniform Concentric Circular Arrays

Moawad Ibrahim Dessouky,

Dr. Moawad Ibrahim Dessouky

Department of Electronics and Electrical Communication Engineering

Menoufia University

Egypt

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Hamdy Sharshar,

Dr. Hamdy Sharshar

Department of Electronics and Electrical Communication Engineering

Menoufia University

Egypt

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Yasser Albagory

Dr. Yasser Albagory

Department of Electronics and Electrical Communication Engineering

Menoufia University

Egypt

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, Vol. 69, 35-46, 2007

doi:10.2528/PIER06111301

Abstract

In this paper, a new tapered beamforming function for side lobe reduction in the uniform concentric circular arrays (UCCA)is proposed. This technique is based on tapering the current amplitudes of the rings in the array, where all elements in an individual ring are weighted in amplitude by the same value and the weight values of different rings are determined by a function that has a normalizedgaussian probability density function variation. This novel tapering window is optimized in its parameters to have the lowest possible side lobe level that may reach 43 dB below the main lobe and these optimum weights are found to be function of the number of elements of the innermost ring and the number of rings in the array. The proposed tapering window can be modified to compensate the gain reduction due to tapering when compared with the uniform feeding case.

Citation

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Moawad Ibrahim Dessouky, Hamdy Sharshar, and Yasser Albagory, "Optimum Normalized-Gaussian Tapering Window for Side Lobe Reduction in Uniform Concentric Circular Arrays," , Vol. 69, 35-46, 2007.
doi:10.2528/PIER06111301

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