Optimization Using Genetic Algorithms of Aperiodic Linear Phased Arrays for Reduction of Grating Lobes for Wide Scanning | ||||
International Conference on Aerospace Sciences and Aviation Technology | ||||
Article 71, Volume 14, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 14 – May 24 - 26, 2011, May 2011, Page 1-7 PDF (340.53 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/asat.2011.23385 | ||||
View on SCiNiTO | ||||
Authors | ||||
A. A. Omer1; H. H. Elbanna2; A. A. Mitkees2 | ||||
1Lecturer Assistant, BHIT, Benha University. | ||||
2Egyptian Armed Forces, Egypt. | ||||
Abstract | ||||
The development of phased array antennas is challenged by the reduction of scan volume due to the appearance of grating lobes. The grating lobes appear in visible space as the spacing between elements be greater than half wavelength. The need for enlarging the spacing between elements is important either for reduction of mutual coupling or filling specific aperture size with small number of antenna elements. These grating lobes should be reduced or eliminated for enlarging the scan space. Nonuniform spacing between elements is an effective method for reduction of grating lobes as it breaks the periodicity of the array which is the reason of grating lobes. This method will be optimized using genetic algorithm implemented using MATLAB. The reduction is -9.7 dB for 8-elements and -12.4 dB for 16- elements at 60° scan angle. | ||||
Keywords | ||||
Uniform subarrays; grating lobes; Genetic Algorithm; nonuniform subarrays | ||||
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