An Optimal Radiation Pattern Synthesis and Correction of Mutually Coupled Circular Dipole Antenna Array

Abstract

This paper proposes a fundamental approach for radiation pattern correction of the mutually coupled circular dipole antenna array (CDAA) using parametric assimilation technique. The effect of mutual coupling is an indispensable part of any practical design issue of the antenna array. Many analytical and numerical techniques have been put forward in the past few decades for the calculation, compensation and reduction of mutual coupling effect. This paper shows an accurate method for mutual coupling correction by using a recently proposed technique called parametric assimilation technique, where the values of mutual impedance are calculated and assimilated with the values of the desired radiation pattern. The proposed technique is cost-effective, less complicated and easy to implement while achieves better performance for mutually coupled circular dipole antenna array synthesis. Grey Wolf Optimization (GWO) algorithm is a state-of-the-art stochastic algorithm applied here to find the optimal values of the current excitation weights and the inter-element spacing between each element of the CDAA for the desired, uncorrected and corrected far-field radiation pattern synthesis. PSO and DE optimization-based statistical results are also reported to compare the results obtained by using GWO algorithm to confirm the outstanding performance of GWO algorithm based design.

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

“…The advantage of these three optimization algorithms is that they do not have any tuning parameters; hence, it can support stable results with minimal complexity. 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.…”

Circularly polarized truncated corner square slot antenna for Ku-band applications

“…A ferrite-based wideband circular patch antenna designed on a two-layer, ferrite-dielectric substrate with a wideband circular polarization characteristic was proposed [18]. A parametric assimilation technique was applied for radiation pattern correction of mutually coupled circular dipole antenna array [19]. The modeling of the PIN (Positive-Intrinsic-Negative) diode RF (Radio Frequency) switch on HFSS (High-Frequency Structure Simulator) was presented for the reconfigurable antenna applications [20].…”