Active Tunable Electromagnetic Structure

Active Tunable Electromagnetic Structure (Prof. Kumar Vaibhav Srivastava, Electrical)

This project aims to fulfil defence sector demands by designing Active Tunable Electromagnetic Structures for stealth technology, structured around three main goals: Time-Modulated Metasurface: Develop a frequency-selective surface that can actively deceive radar by producing selectable harmonics and sidebands. By dynamically controlling modulation frequencies, these systems disrupt Doppler radar imaging, making target detection difficult or impossible due to the creation and suppression of multiple frequency components. Reconfigurable Rasorber: Demonstration of a rasorber that provides a transmission band within an absorption band, which can be dynamically converted to an absorption band as needed. This technology is especially useful for adaptive radome structures, which require variable electromagnetic properties for protection and RF transparency. Tunable Absorber: Design absorbers with dynamically tunable frequency bands, allowing absorption characteristics to be actively shifted across required frequency ranges, enhancing stealth capabilities against a broader set of radar systems.