Broadband Cross-Slotted Patch Antenna for 5G Millimeter-Wave Applications Based on Characteristic Mode Analysis

• Published in: IEEE transactions on antennas and propagation 2022-12, Vol.70 (12), p.11277-11292
• Main Authors: Chen, Jiangcheng, Berg, Markus, Rasilainen, Kimmo, Siddiqui, Zeeshan, Leinonen, Marko E., Parssinen, Aarno
• Format: Article
• Language: English
• Subjects: Antenna feeds; Antenna radiation patterns; Antennas; Aperture antennas; Broadband; Broadband antennas; Characteristic mode analysis (CMA); complementary antenna; Dipole antennas; Dipoles; Dual polarization (waves); dual-polarized antenna; fifth generation (5G); Frequencies; Magnetic properties; magnetoelectric (ME) dipole; Microstrip antenna arrays; Millimeter waves; millimeter-wave (mm-Wave); Patch antennas; Radiation; ring patch antenna; Slot antennas
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2022.3209217

This article proposes a wideband differentially fed dual-polarized magnetoelectric (ME) dipole for millimeter-wave (mm-Wave) applications. Various electric and magnetic characteristic modes of a slotted patch antenna are investigated and utilized effectively to create a stable broadside radiation pattern, covering fifth-generation (5G) frequency bands from 24.25 to 40 GHz. To implement this, the lifted ground (LGND) concept is applied to achieve a 57.1% impedance bandwidth for a single antenna element. In addition, the three resonances of the antenna can be manipulated independently. The use of differential feeding allows more than 36 dB of port-to-port isolation across the entire operating band. The measured gains of the single element and 2\times 2 array are 8.4 and 13.4 dBi, respectively. Also, the measured results indicate symmetrical E- and H-plane radiation patterns and cross-polarization levels lower than −26 dB. With the favorable electrical performance, compact size, simple structure, and low-cost fabrication, the proposed ME dipole is a promising candidate for mm-Wave Antenna-in-Package (AiP) applications.