Multibeam Characteristics of a Negative Refractive Index Shaped Lens

Area of Science:

• Electromagnetics
• Antenna Theory
• Telecommunications Engineering

Background:

• Current array antennas face challenges in upper 5G bands due to complexity and size constraints.
• Higher frequencies necessitate smaller antenna elements, increasing the need for more elements and complex feeding networks.
• Lens antennas present a viable alternative for next-generation mobile base stations.

Purpose of the Study:

• Investigate the multibeam characteristics of a negative refractive index shaped lens.
• Evaluate its suitability for mobile base station applications in 5G technology.
• Explore its potential to overcome limitations of existing array antenna structures.

Main Methods:

• Utilized energy conservation and Abbe's sine principle for lens design.
• Selected feed positions on a circle around the lens center for multibeam generation.
• Validated feed position accuracy through Electromagnetic (EM) simulation.

Main Results:

• Designed a negative refractive index shaped lens with a smaller radius and slender profile compared to conventional lenses.
• Demonstrated the lens's capability for high gain and narrow beamwidth.
• Confirmed the potential for wide-angle beam scanning and multibeam operation.

Conclusions:

• The proposed negative refractive index shaped lens is a strong candidate for 5G mobile base stations.
• It offers advantages in gain, beamwidth, and multibeam functionality over traditional array antennas.
• The design facilitates efficient wide-angle beam scanning, crucial for future wireless communication.