DESIGN OF AN INTEGRATED MIMO ANTENNA SYSTEM SUPPORTING SUB-6 GHZ AND MILLIMETER-WAVE BANDS FOR 5G APPLICATIONS

Abstract

The fifth-generation (5G) wireless communication system demands compact and efficient antenna architectures capable of supporting dual-band operation. This work proposes a hybrid multiple-input multiple-output (MIMO) antenna system integrating planar dipole elements for Sub-6 GHz operation and tapered slot Vivaldi antennas for millimeter-wave (mmWave) bands. The antenna is fabri- cated on a Rogers RT/Duroid 5880 substrate and covers two frequency ranges:

3.4–10 GHz and 22.1–40 GHz. Simulations performed using ANSYS HFSS show that the antenna achieves wide impedance bandwidth, high gain (up to 7.18 dBi), and mutual coupling below –20 dB. These features support omnidirectional and directional radiation patterns, making the design suitable for compact 5G terminals.