Compact Sub 6 GHz Slot Multiantenna System for 5G Laptops

Area of Science:

• Electromagnetics and Antenna Engineering
• Wireless Communication Systems
• 5G Technology

Background:

• 5G mobile communication requires advanced antenna systems for laptops.
• Integration of antennas in compact devices like laptops presents significant design challenges.
• Existing antenna solutions often struggle with isolation and correlation in multi-antenna setups.

Purpose of the Study:

• To propose and validate a sub-6 GHz dual-band closed-slot multiantenna system specifically for 5G laptop applications.
• To achieve high performance in terms of isolation and envelope correlation coefficients (ECCs) within a compact form factor.
• To demonstrate the suitability of the proposed antenna system for laptops with high screen-to-body ratios and metal back covers.

Main Methods:

• Design of a compact, dual-band closed-slot antenna utilizing asymmetric T-shaped feeding and chip capacitors.
• Arrangement of six such antennas in parallel within a defined clearance space (217 × 3 mm²) for a multiantenna system.
• Characterization of antenna performance including fractional bandwidth, isolation, efficiency, and ECCs through measurements and radiation pattern analysis.

Main Results:

• The proposed antenna system operates in the sub-6 GHz range, covering 3300-3600 MHz and 4800-5000 MHz bands.
• Achieved excellent isolation (>10 dB) and low ECCs (<0.2) without additional isolation components.
• Demonstrated measured fractional bandwidths of 10.15% and 6.73% at 3450 MHz and 4900 MHz, respectively.
• Antenna efficiency ranged between 46% and 76%.

Conclusions:

• The developed sub-6 GHz dual-band closed-slot multiantenna system is highly suitable for 5G laptop integration.
• The antenna's compact size, simple structure, and superior performance metrics address key challenges in mobile device antenna design.
• The system's performance validates its potential for enhancing wireless connectivity in next-generation laptops.