A High-Efficiency Filtering Magnetoelectric Dipole Antenna Without Filtering Feed Line

Abstract

The renowned magnetoelectric dipole (ME-dipole) consists of three primary structural components: a magnetic dipole, an electric dipole, and a feed line. All previous works utilized feed lines to generate filtering radiation, yet they have struggled with low efficiencies, not exceeding 90%. This article introduces a novel method to achieve high efficiency in an ME-dipole filtenna by modifying the magnetic dipole without modifying the feed line and the electric dipole, which has not been utilized for this purpose. The modified magnetic dipole is loaded with numerous free-form parasitic patches to manipulate the equivalent magnetic currents and suppress stopband radiation. However, the complexity of tuning the structural parameters of these patches necessitates an automated approach. To address this, we propose an automatic co-simulation-optimization platform (ACSOP) incorporating the gray wolf optimizer (GWO). This platform automates the development of filtering antennas (filtennas), eliminating the need for prior knowledge of filtering principles. Our proposed ME-dipole filtenna achieves a high efficiency of 93%.