Optimal radiation pattern synthesis of mutually coupled antenna array using an efficient compensation method

Abstract

An efficient compensation method is proposed for the reduction of mutual coupling among the elements of an antenna array using the optimum current amplitude excitation weights. The performance of an antenna array degrades heavily due to mutual coupling. The mutual coupling effect can neither be eliminated nor be ignored in the context of the antenna array design. Several analytical and numerical techniques have been proposed in the past few decades for the calculation and compensation of mutual coupling effect. Here, the mutual coupling is compensated by reducing the driving impedance of each identical array element in the array by adopting grey wolf optimization and moth flame optimization algorithms, respectively. The sum of the driving impedances of each element of the antenna array is reduced efficiently by adjusting the feed current amplitudes of all the individual array elements. Compared to the existing known methods, the proposed method is less complex, cost-effective and easy to implement for commercial and industrial applications to achieve better performance.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

An optimal linear and elliptical antenna array design using black widow optimisation for 5G communication

“…After the generation of the initial population in BWO, the pairs of parameters are randomly selected to perform the next step, named procreate, where each couple of black widow spiders mate separately in the web to recreate the new generation. In the BWO algorithm, an array called 'α' is generated with a random number to produce the offspring as given in (7).…”

“…4 The radiation pattern of an array antenna generally builds upon parameters like the array's geometry, feeding currents and the separation between the elements of the array. The engineers are forced to design an array antenna that maintains a lower SLL and the narrow HPBW [6][7][8][9][10] due to the rising utilisation of the spectrum of 5G bands. The maximum SLL reduction for antenna array systems using hardware implementation is discussed in Hussein et al 11 However, it is exceedingly challenging to construct an accurate antenna array that maintains reduced SLL and HPBW values throughout the spectrum of 5G communication because these two requirements will never be met simultaneously.…”

Position‐only planar hexagonal array antenna pattern nulling with simultaneous side lobe reduction at multiple azimuth planes

“…From literature survey, it can be seen that array radiation pattern optimization is performed using meta-heuristic algorithms on linear, 3 circular, [24][25][26][27][28] and elliptical array structures. The reason for preferring hexagonal array structure over other types of array [29][30][31][32][33][34][35][36][37][38] structure is that the radiation pattern of hexagonal antenna array posses a symmetry about the origin hence symmetric null placement at any plane of radiation is achievable with minimal effort. Also, rotation of the main beam for a desired angular value does not affect the radiation pattern at all which support stability and reduces complexity of the optimization.…”