Synthesis of circular antenna arrays for reduction of side lobe and first null beamwidth using PSOIIW

2013 ◽  
Author(s):  
Gopi Ram ◽  
Sudipta Das ◽  
Durbadal Mandal ◽  
Rajib Kar ◽  
Sakti Prasad Ghoshal
Keyword(s):  
Antenna Arrays ◽  
Side Lobe ◽  
Circular Antenna Arrays ◽  
First Null Beamwidth

Side Lobe Optimization in Circular Antenna Arrays

1969 ◽  
Vol 15 (10) ◽  
pp. 644-650
Author(s):  
Madhavendra Nath ◽  
G. S. Shukla
Keyword(s):  
Antenna Arrays ◽  
Side Lobe ◽  
Circular Antenna Arrays

Synthesis of Linear, Planar, and Concentric Circular Antenna Arrays Using Rao Algorithms

2020 ◽  
Vol 11 (3) ◽  
pp. 31-49
Author(s):  
Jaya Lakshmi Ravipudi
Keyword(s):  
Antenna Arrays ◽  
Optimization Algorithms ◽  
Side Lobe ◽  
Binary Particle Swarm Optimization ◽  
Lower Side ◽  
Improved Genetic Algorithm ◽  
Swarm Optimization ◽  
Teaching Learning Based Optimization ◽  
Teaching Learning ◽  
Circular Antenna Arrays

The aim of this paper is to display the efficacy of three newly proposed optimization algorithms named as Rao-1, Rao-2, and Rao-3 in synthesizing antenna arrays. The algorithms are applied to three different antenna array configurations. Thinned arrays with isotropic radiators are considered and the main objective is to find the optimal configuration of ON/OFF elements that produce low side lobe levels. The results of Rao-1, Rao-2, and Rao-3 algorithms are compared with those of improved genetic algorithm (IGA), hybrid Taguchi binary particle swarm optimization (HTBPSO), teaching-learning-based optimization (TLBO), the firefly algorithm (FA), and biogeography-based optimization (BBO). The Rao-1, Rao-2, and Rao-3 algorithms were able to realize antenna arrays having lower side lobe levels (SLL) when compared to the other optimization algorithms.

Synthesis of non-uniform circular antenna arrays with multiple constraints

2017 ◽  
Vol 10 (3) ◽  
pp. 368-375
Author(s):  
Hua Guo ◽  
Lin Cui ◽  
Xiaodan Zhang ◽  
Yameng Jiao
Keyword(s):  
Radiation Pattern ◽  
Antenna Arrays ◽  
Synthesis Method ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Multiple Constraints ◽  
Invasive Weed Optimization ◽  
Invasive Weed ◽  
Adjacent Element ◽  
Circular Antenna Arrays

Synthesis of non-uniform circular antenna arrays using a hybrid invasive weed optimization is introduced in this paper. The excitation weights and positions of array elements are optimized to reduce the peak side lobe level (PSLL) of the radiation pattern. The method proposed in this paper can effectively constrain the number of the array elements, size of the array, and the angular spacing of the adjacent element simultaneously. The radiation pattern has the constraint of a fixed major lobe beamwidth. Synthesis results of three different circular antenna arrays are given. The results show the effectiveness and feasibility of the proposed synthesis method in non-uniform circular antenna arrays.

scholarly journals Pattern Synthesis of Planar Nonuniform Circular Antenna Arrays Using a Chaotic Adaptive Invasive Weed Optimization Algorithm

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Huaning Wu ◽  
Chao Liu ◽  
Xu Xie
Keyword(s):  
Antenna Arrays ◽  
Search Space ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Antenna Element ◽  
Invasive Weed Optimization ◽  
Pattern Synthesis ◽  
Invasive Weed ◽  
Fitness Value ◽  
Circular Antenna Arrays

A novel invasive weed optimization (IWO) variant called chaotic adaptive invasive weed optimization (CAIWO) is proposed and applied for the optimization of nonuniform circular antenna arrays. A chaotic search method has been combined into the modified IWO with adaptive dispersion, where the seeds produced by a weed are dispersed in the search space with standard deviation specified by the fitness value of the weed. To evaluate the performance of CAIWO, several representative benchmark functions are minimized using various optimization algorithms. Numerical results demonstrate that the proposed approach improves the performance of the algorithm significantly, in terms of both the convergence speed and exploration ability. Moreover, the scheme of CAIWO is employed to find out an optimal set of weights and antenna element separation to obtain a radiation pattern with maximum side-lobe level (SLL) reduction with different numbers of antenna element under two cases with different purposes. The design results obtained by CAIWO have comfortably outperformed the published results obtained by other state-of-the-art metaheuristics in a statistically meaningful way.

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