A High-Directivity Microstrip Patch Antenna Design by Using Genetic Algorithm Optimization

Abstract

Abstract-A high-directivity patch antenna with broadside directivity is attractive, since a narrow beam can be obtained without the need of using an array of antennas. Therefore, the solution becomes simpler as there is no need for a complicated feeding network. In this sense, this paper presents a novel patch antenna design with high directivity in the broadside direction by using genetic algorithms (GA). The proposed GA method divides the overall patch area into different cells taking into account that cells have a small overlap area between them. This avoids optimized geometries where cells have only an infinitesimal connection. Therefore, the proposed method is robust for manufacturing. The antenna operates in a higher-order mode at 4.12 GHz and the geometry fits inside a patch of 40 mm × 40 mm on a substrate with a relative permittivity of 3.38 and a thickness of 1.52 mm resulting in a directivity of 10.5 dBi. The specialty of this design is the use of GA to select the optimized shape and the feeding position instead of a known shape and a fixed feeding position. The antenna has been fabricated and the simulation results are in good agreement with the measurements. This results in a simpler design of a single high-directivity patch, which can substitute an array of two elements operating in the fundamental mode.

Design of a Novel Wideband Low-Scattering Shared Aperture Metasurface

“…2(b), we can quickly get the scattering pattern of the SA-MS before the full wave simulation [23], [24]. For example, when f = 6.13 GHz, which means d ≈ λ, φ PMA = π, φ AMC1 = 0, φ AMC2 = 2/3π.…”

A Novel Binary Butterfly Mating Optimization Algorithm With Subarray Strategy for Thinning of Large Antenna Array

“…Many stochastic, probabilistic or evolutionary optimization approaches, such as the simulated annealing, genetic algorithm [1], ant colony optimization [4], different evolutions [5], particle swarm optimization algorithm [6] and invasive weed optimization [7] have been used and shown to be effective for the synthesis of thinned arrays. Some other approaches [8][9][10] have also been proposed.…”

Increasing the directivity of a microstrip patch array by genetic optimization

“…Another technique to increase the directivity is the use of stacked patch antennas (Anguera et al, 2004). In addition to the above, high-directivity antennae based on superstrates (Foroozesh & Shafai, 2012 Jayasinghe et al (2013a;b) propose the design of a high-directivity microstrip patch antenna to replace a 2 × 1 and a 4 × 1 conventional patch arrays by avoiding feeding networks. In contrast, the present study proposes applying genetic algorithms (GA) on an array, and in particular, to each of the elements of a 2 × 1 array.…”