Omer, A., Elbanna, H., Mitkees, A. (2011). Optimization Using Genetic Algorithms of Aperiodic Linear Phased Arrays for Reduction of Grating Lobes for Wide Scanning. test, 14(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 14 – May 24 - 26, 2011), 1-7. doi: 10.21608/asat.2011.23385
A. A. Omer; H. H. Elbanna; A. A. Mitkees. "Optimization Using Genetic Algorithms of Aperiodic Linear Phased Arrays for Reduction of Grating Lobes for Wide Scanning". test, 14, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 14 – May 24 - 26, 2011, 2011, 1-7. doi: 10.21608/asat.2011.23385
Omer, A., Elbanna, H., Mitkees, A. (2011). 'Optimization Using Genetic Algorithms of Aperiodic Linear Phased Arrays for Reduction of Grating Lobes for Wide Scanning', test, 14(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 14 – May 24 - 26, 2011), pp. 1-7. doi: 10.21608/asat.2011.23385
Omer, A., Elbanna, H., Mitkees, A. Optimization Using Genetic Algorithms of Aperiodic Linear Phased Arrays for Reduction of Grating Lobes for Wide Scanning. test, 2011; 14(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 14 – May 24 - 26, 2011): 1-7. doi: 10.21608/asat.2011.23385

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, Pages 1-7    PDF (340.53 K)
Document Type: Original Article
DOI: 10.21608/asat.2011.23385
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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