DocumentCode :
3587482
Title :
Adaptive antenna array pattern synthesis for suppressed sidelobe level and controlled null using genetic algorithm
Author :
Pal, Parthasarathi ; Mondal, Durbadal
Author_Institution :
Dept. of ECE, NIT Durgapur, Durgapur, India
fYear :
2014
Firstpage :
1
Lastpage :
6
Abstract :
This paper contains optimal radiation pattern of linear adaptive antenna array obtained using Genetic Algorithm (GA) for reducing the sidelobe level (SLL) and imposing nulls at prescribed interfering directions. Different Fitness functions have been used for performance study of GA for achieving optimal current distribution on the array aperture. Null imposition is considered in this paper in three different ways such as null at single point, multiple directions and nulls in a wide spatial range. The same fitness function has been used here to impose deeper nulls at various desired directions as well as for creating wide nulls. The minimum SLL is achieved for a 20 element isotropic array at approximately -51dB whereas a deeper null of approximately -99dB has been imposed at 40°. The relation between the fitness functions and the excitations are also discussed herewith. Obtained results show that the resultant patterns have SLL and null-performance as per requirement. It also shown that the SLL reduction approach can be extended to the array pattern with main beam steered to desired user. Multiple objectives such as null placement as well as sidelobe suppression are simultaneously achieved with a single fitness function in single-stage optimization.
Keywords :
adaptive antenna arrays; antenna radiation patterns; aperture antennas; current distribution; genetic algorithms; linear antenna arrays; GA; SLL reduction approach; current distribution; fitness function; genetic algorithm; isotropic array; linear adaptive aperture antenna array radiation pattern synthesis; null imposition; sidelobe level suppression; single-stage optimization; wide spatial range; Antenna radiation patterns; Arrays; Convergence; Genetic algorithms; Linear antenna arrays; Optimization; GA; SLL; convergence; fitness function; linear antenna array; steer; wide null;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Convergence of Technology (I2CT), 2014 International Conference for
Print_ISBN :
978-1-4799-3758-5
Type :
conf
DOI :
10.1109/I2CT.2014.7092156
Filename :
7092156
Link To Document :
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