scholarly journals Certain investigations on the reduction of side lobe level of an uniform linear antenna array using biogeography based optimization technique with sinusoidal migration model and simplified-BBO

Sadhana ◽  
2014 ◽  
Vol 39 (1) ◽  
pp. 81-95 ◽  
Author(s):  
T S JEYALI LASEETHA ◽  
R SUKANESH
Keyword(s):  
Antenna Array ◽  
Optimization Technique ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Linear Antenna ◽  
Migration Model ◽  
Linear Antenna Array

scholarly journals A Novel Modified Sparrow Search Algorithm with Application in Side Lobe Level Reduction of Linear Antenna Array

2021 ◽  
Vol 2021 ◽  
pp. 1-25
Author(s):  
Qiankun Liang ◽  
Bin Chen ◽  
Huaning Wu ◽  
Chaoyi Ma ◽  
Senyou Li
Keyword(s):  
Antenna Array ◽  
Antenna Arrays ◽  
Search Algorithm ◽  
Side Lobe ◽  
Side Lobe Level ◽  
Linear Antenna ◽  
Test Functions ◽  
Linear Antenna Array ◽  
Benchmark Test Functions ◽  
Modified Algorithm

Antenna arrays play an increasingly important role in modern wireless communication systems. However, how to effectively suppress and optimize the side lobe level (SLL) of antenna arrays is critical for communication performance and communication capabilities. To solve the antenna array optimization problem, a new intelligent optimization algorithm called sparrow search algorithm (SSA) and its modification are applied to the electromagnetics and antenna community for the first time in this paper. Firstly, aimed at the shortcomings of SSA, such as being easy to fall into local optimum and limited convergence speed, a novel modified algorithm combining a homogeneous chaotic system, adaptive inertia weight, and improved boundary constraint is proposed. Secondly, three types of benchmark test functions are calculated to verify the effectiveness of the modified algorithm. Then, the element positions and excitation amplitudes of three different design examples of the linear antenna array (LAA) are optimized. The numerical results indicate that, compared with the other six algorithms, the modified algorithm has more advantages in terms of convergence accuracy, convergence speed, and stability, whether it is calculating the benchmark test functions or reducing the maximum SLL of the LAA. Finally, the electromagnetic (EM) simulation results obtained by FEKO also show that it can achieve a satisfactory beam pattern performance in practical arrays.

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