An Ultra-wideband Off-axis Reflector Lens

The paper describes the design, fabrication and characterization of an ultra-wideband off-axis reflector lens operating between 6.8 GHz and 16.8 GHz. The lens is constructed using a single layer metasurface, consisting of a single ring with two equal openings. The design achieves an efficiency greater than 80% polarization conversion and a cross-polarization gain of 10 dB at the center frequency. The experimental results are in good agreement with the numerical simulations.