A High-Performance Transmitarray Antenna with Thin Metasurface for 5G Communication Based on PSO (Particle Swarm...

Area of Science:

• Electromagnetics and Metamaterials
• Antenna Theory and Design
• Wireless Communication Technologies

Background:

• Metasurface (MS) transmitarrays (TA) are crucial for beamforming in modern wireless systems.
• Achieving high gain and low side-lobe levels (SLL) simultaneously is a persistent challenge.
• Existing TA designs often face limitations in phase shift range and optimization efficiency.

Purpose of the Study:

• To design and optimize a 5G metasurface (MS) transmitarray (TA) for enhanced performance.
• To improve gain and reduce side-lobe level (SLL) for 5G communication applications.
• To investigate the effectiveness of particle swarm optimization (PSO) for TA phase distribution.

Main Methods:

• A two-layer metallic metasurface (MS) with vias was designed to operate at 28 GHz.
• The transmitarray (TA) was designed using unit cells with varying dimensions, mimicking an optical lens.
• Particle swarm optimization (PSO) was employed to optimize the phase distribution for SLL reduction.

Main Results:

• The optimized TA achieved a gain of 27 dB at 28 GHz.
• A 3 dB gain bandwidth of 11.8% and an aperture efficiency of 23% were recorded.
• The optimized TA demonstrated a significantly reduced SLL of -30 dB within the 27.5-29.5 GHz bandwidth.

Conclusions:

• The proposed metasurface (MS) transmitarray (TA) offers superior performance compared to non-optimized designs.
• The optimized TA exhibits high gain, low SLL, and wide operational bandwidth, suitable for 5G systems.
• The low cost, low profile, and ease of configuration make this TA a promising solution for 5G communication and radar systems.