Comparison of evolutionary algorithms for LPDA antenna optimization

Abstract

Key Points:• An LPDA antenna has been optimized by five evolutionary algorithms.• The best overall performance is exhibited by the IWO algorithm.• IWO produces the best fitness value but it also has the slowest convergence. AbstractA novel approach to broadband log-periodic antenna design is presented, where some of the most powerful evolutionary algorithms (EAs) are applied and compared for the optimal design of wire log-periodic dipole arrays (LPDA) using NEC (Numerical Electromagnetics Code). The target is to achieve an optimal antenna design with respect to maximum gain, gain flatness, Front to Rear ratio (F/R) and SWR (Standing Wave Ratio). The parameters of the LPDA optimized are the dipole lengths, the spacing between the dipoles, and the dipole wire diameters. The evolutionary algorithms compared are the: Differential Evolution (DE), Particle Swarm (PSO), Taguchi, Invasive Weed (IWO) and Adaptive Invasive Weed Optimization (ADIWO). Superior performance is achieved by the IWO (best results) and PSO (fast convergence) algorithms.

Open-Source Software for Electromagnetic Scattering Simulation: The Case of Antenna Design

“…NEC-2 code has also found interesting applications in radio astronomy, in particular for projects related to low-frequency radio-telescopy [34,35]. The use of NEC-2 as a simulation engine in optimization processes has been proposed for the project of generic wire antennas [36], as well as for the optimization of the parameters of dipole arrays [37] and the design of logarithmic-periodic antennas [38]. In the field of arrays, around the NEC-2 program algorithms for the estimation of the direction of arrival (DOA) have been also developed [39].…”

Measurement, simulation and optimization of wideband log-periodic antennas

“…Measurement, simulation and optimization of wideband log-periodic antennas K. Mistry* (1) , P. Lazaridis (1) , I. Glover (1) , V. Holmes (1) , F. Khan (1) , Q. Ahmed (1) Z. Zaharis (2) and T. Xenos…”

“…LPDAs present a flat gain and a flat frequency response within their wide frequency range of operation [1]. The gain of the antenna can be increased by increasing the number of dipoles [2]. LPDAs provide a better front-to-back performance but relatively less gain than the Yagi-Uda array antenna [3].However,the LPDA has a much larger bandwidth as compared to the Yagi-Uda antenna.…”

Optimization of log-periodic dipole antenna with LTE band-rejection

“…The gain of LPDA significantly depends on the number of dipole elements used in the design. Gain increases by increasing the number of dipoles [11]. The coaxial cables at front end of both the booms provide feeding source for the antenna.…”