A gain-reconfigurable flat gradient refractive index plasma lens.

Area of Science:

• Electromagnetics and Optics
• Antenna Engineering
• Plasma Physics

Background:

• Gradient-index (GRIN) lenses offer unique wave manipulation properties.
• Controlling dielectric properties of materials is key for reconfigurable antennas.
• Plasma materials present tunable electromagnetic characteristics.

Purpose of the Study:

• To present a novel reconfigurable flat GRIN lens antenna.
• To utilize controllable plasma dielectric materials for agile beam shaping.
• To derive analytical design equations and validate them experimentally.

Main Methods:

• Designing a multi-layered cylindrical plasma lens with adjustable plasma frequencies.
• Deriving analytical equations for optimal GRIN plasma lens dimensions and gain.
• Conducting numerical simulations and experimental validation using a low-cost prototype.

Main Results:

• Achieved over 10 dB gain enhancement via numerical simulations.
• Experimental results showed approximately 3.5 dB gain enhancement in the E-plane.
• Demonstrated agile beam shaping capabilities through plasma permittivity control.

Conclusions:

• The proposed flat GRIN plasma lens offers reconfigurability and beam control.
• Analytical models and design methodology are validated by simulation and experimental data.
• The concept shows practical implementation potential for advanced antenna systems.