Dual-Polarized Dual Magnetoelectric Dipole Antenna Based on Composite Dielectric and Metallic Patches

A novel dual-polarized dual magnetoelectric (ME) dipole antenna is proposed. It comprises composite patches of a metallic patch (MP) printed on the substrate and a metallic strips-loaded dielectric patch (DP). Benefits from the multimode characteristic of the DP, the fundamental <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">TM</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> mode of it serves as a magnetic dipole (MD), the higher-order <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">TE</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> mode of the DP acts as the electric dipole (ED), while the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">TM</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> mode of the MP equivalent to another ED. Through sharing the MD by two EDs, two pairs of ME-dipoles are formed as a dual-ME-dipole antenna. In this case, it effectively expands the impedance bandwidth with a low profile while maintaining stable radiation performance in the operating band. Measured results indicate a bandwidth of 19.2% with |<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">S</i><sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub>| < −15 dB. The in-band isolation is greater than 20 dB, the gain variation is ±0.5 dBi, and the half-power beamwidth variation is within 2°.