Design of ultra‐wideband multilayer slant linear polarizer using a genetic algorithm

Abstract

In this letter, for the first time, a genetic algorithm is applied successfully for the design and optimization of a multilayer slant linear polarizer to co¨er a bandwidth of 1:18. In the algorithm, the fitness function is selected based on the return-loss requirement. A minimum of 10 dB return loss in the specified bandwidth was achie¨ed.

Design of slant polariser for directional antennas and antenna arrays

“…In these polarisers, metallic strips are shaped like a meander line and have an angular orientation of 45° on each layer. Slant polarisers consist of metallic strips and have been used only for omnidirectional antennas in previous years [8][9][10][11][12]. However, there are no reported slant polariser studies that have been confirmed by measurement results for directional antennas and antenna arrays.…”

“…Additionally, in [8][9][10][11][12], the parameters of the metallic strips forming the polarisers were found by means of trial and error and vice optimisation techniques, which require high computational cost and time. However, in this study the parameters of the metallic strips are calculated using the analytical solution [13][14][15][16][17][18].…”

“…Compared with the other studies [8][9][10][11][12], the proposed slant polariser is used with high-gain antennas and arrays. Thus, this study also indicates the performance of slant polariser with highgain situation.…”

A dual‐polarized biconical antenna for direction finding applications from 2 to 18 GHz

“…Specifically, several layers of polarizers are used to rotate the plane of polarization of horizontally and vertically polarized incident signals so that they become polarized at a slant angle of 45°. So, this antenna can received both polarization at the expense of 3 dB loss for vertically polarized incident signals . In addition, in order to reduce the reception of signals reflected from the ground, we are going to design an asymmetric biconical antenna such that the maximum of the radiation pattern shifts towards the upper cone and away from the ground .…”