Electrically thin flat lenses and reflectors.

Area of Science:

• Electromagnetics and Optics
• Materials Science

Background:

• Traditional metallic dishes and reflectors are bulky and heavy.
• There is a need for lightweight and efficient focusing optics.

Purpose of the Study:

• To introduce novel, electrically thin dielectric lenses and reflectors.
• To demonstrate their ability to focus plane waves using phase compensation and constructive interference.

Main Methods:

• Designing dielectric lenses with varying permittivity profiles using analytic equations.
• Arranging thin rectangular dielectric slabs to achieve phase compensation.
• Simulating plane wave focusing and power gain.

Main Results:

• Demonstrated strong focusing of plane waves, even with impedance mismatch.
• Achieved focusing at 9.45 GHz using commercially available dielectric materials.
• Observed relatively high power gain at the focal point.

Conclusions:

• The proposed flat dielectric lenses and reflectors effectively focus plane waves.
• These novel optics are promising replacements for heavy metallic dishes in applications like satellites.