A defected ground structure based ultra-compact wider bandwidth terahertz multiple-input multiple-output antenna for...

Area of Science:

• Antenna Engineering
• Terahertz Technology
• Wireless Communications

Background:

• Terahertz (THz) frequencies offer vast bandwidth for high-speed wireless communication.
• Developing efficient antennas for THz MIMO systems remains a challenge due to size constraints and performance requirements.

Purpose of the Study:

• To design and analyze a quad-port wideband THz MIMO antenna.
• To enhance MIMO performance using a defective ground structure (DGS).

Main Methods:

• A rectangular metallic patch antenna with parasitic elements on a polyamide substrate was designed.
• The antenna was configured into a quad-port MIMO system with specific element spacing.
• A DGS was incorporated to improve isolation and MIMO diversity characteristics.

Main Results:

• The proposed THz MIMO antenna operates from 1.7 to 10.4 THz.
• Isolation exceeding 20 dB was achieved between 2.8-10.4 THz, and >10 dB from 1.7-2.7 THz.
• Excellent MIMO diversity metrics were obtained, including ECC < 0.004 and DG ~ 10 dB.

Conclusions:

• The DGS effectively enhances isolation in the THz MIMO antenna.
• The designed antenna demonstrates robust performance for future THz wireless applications.
• The study validates the potential of DGS in improving THz MIMO antenna systems.