Amir Saman Nooramin

Gap-engineered four-spiral terahertz metamaterial absorber for ratio-based self-referenced refractive-index sensing

A gap-engineered four-spiral terahertz (THz) metamaterial absorber is proposed for multi-mode, self-referenced refractive-index sensing using a normalized ratio-based readout. The unit cell consists of four square-spiral Au resonators arranged in a 2 × 2 configuration on a low-lo...

The implementation of wide angle and UWB retrodirective linear Van Atta array

This paper presents the design, fabrication, and experimental validation of a broadband 1×16 Van Atta reflector array based on compact antipodal Vivaldi antennas. The proposed structure achieves wide azimuthal coverage in addition to ultra-wideband operation, ensuring stable retr...