Title :
Iterative fast Fourier transform for side lobe level reduction of non-uniformly excited thinned linear array antenna
Author :
Mahanti, G.K. ; Mahanti, Anirban ; Pilli, Harikumar
Author_Institution :
Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Durgapur, India
Abstract :
This paper describes the design of non-uniformly excited and uniformly spaced thinned linear array antenna. The method is based on the iterative fast Fourier transform. Thinning of the antenna array can be accomplished by making the predetermined number of element excitations to zero to meet the desired side lobe level. In this paper two examples are presented for the maximization of the number of switched off elements to meet the desired side lobe level of -35 dB and -30 dB with a linear array antenna of 160 elements. The basic advantage of the iterative Fourier transform is its computational speed.
Keywords :
UHF antennas; ant colony optimisation; antenna feeds; fast Fourier transforms; genetic algorithms; iterative methods; linear antenna arrays; particle swarm optimisation; search problems; ant colony optimization; complexity reduction; computational speed; cost reduction; element excitations; feeding network; genetic search algorithms; global optimization techniques; iterative fast Fourier transform; nonuniformly excited thinned linear array antenna; particle swarm optimization methods; side lobe level reduction; switched off element maximization; uniformly spaced thinned linear array antenna; weight reduction; Antenna radiation patterns; Arrays; Dipole antennas; Fast Fourier transforms; Linear antenna arrays; Switches; Fast Fourier Transform; Side lobe level; Thinned linear Array;
Conference_Titel :
Microwave and Photonics (ICMAP), 2013 International Conference on
Conference_Location :
Dhanbad
Print_ISBN :
978-1-4799-2176-8
DOI :
10.1109/ICMAP.2013.6733461
