Wideband miniaturized patch radiator for Sub-6 GHz 5G devices

Area of Science:

• Electromagnetics and Antenna Design
• Wireless Communication Engineering

Background:

• Sub-6 GHz spectrum is crucial for 5G deployment.
• Compact and wideband antennas are essential for mobile devices.

Purpose of the Study:

• To design and develop a compact, wideband elliptically slotted semi-circular patch radiator.
• To achieve size reduction while maintaining wide operational bandwidth for sub-6 GHz applications.

Main Methods:

• Design and simulation of a miniaturized semi-circular patch radiator with a defected ground structure.
• Investigation of parameter variations (slot dimensions, ground plane, feed line) for performance optimization.
• Fabrication and measurement of the proposed antenna.

Main Results:

• Achieved a compact radiator size of 23.885 × 23.885 × 1.405 mm³.
• Obtained a wide bandwidth of 2140 MHz (3.2 GHz-5.34 GHz) with 50% fractional bandwidth.
• Validated antenna performance for C-band and 5G FR1 bands (n77, n78, n79).

Conclusions:

• The proposed antenna design offers significant size reduction and wideband performance.
• The radiator is suitable for sub-6 GHz 5G applications, including C-band and specific FR1 bands.
• The design provides flexibility in tuning the operating band through slot dimension adjustments.