Large-scale Time-modulated mm-Wave Arrays for Dynamically Reconfigurable Spatial Mode Multiplexing in Twisted Waves and for Physical Layer Security
Abstract
Large-scale Time-modulated mm-Wave Arrays for Dynamically Reconfigurable Spatial Mode Multiplexing in Twisted Waves and for Physic Project Summary - (Approved for Public Release) The vision of this project is to demonstrate generalized time-modulated arrays that can encode information into specially synthesized radiated electromagnetic fields allowing new forms of spatial multiplexing capabilities in addition to time, frequency and polarization, and allowing imprinting of physical layer security in directional wireless links. Encoding information into orthogonal properties of electromagnetic fields in time, frequency, space and polarization forms the foundation of wireless communication and sensing technologies. In particular, one of the embodiments of such control (in spatial domain) are phased arrays and MIMO arrays that establish directional beams with electronically scanning ability. In addition to space-based multiplexing, wireless systems have also exploited orthogonality in time, frequency and polarization to enable higher channel capacity in wireless links. It can be noted that all of these techniques assume a planar phase front propagating in space, which is however only of the many possible solutions in free-space propagating waves. In this proposal, we focus on another dimension of capacity enhancement through orthogonal spiral phase fronts in helically twisted waves. The current state of the art in synthesis and detection of these wavefronts constitute static spiral phase plates that have no or very limited reconfigurability, and have been experimentally generated with radio architectures that are not scalable to phased arrays. This effort will provide new methodologies to allow mode multiplexing and capacity enhancement with orders of magnitude faster reconfigurability in dynamically programmable twisted wave generation/detection. We plan to investigate, analyze and demonstrate this at mm-Wave frequencies with scalable circular sub-arrays with integrated phase control that allows reconfigurable twisted wave synthesis/detection at nanosecond time scales.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 09, 2020
- Source ID
- N000142012063
Entities
People
- Kaushik Sengupta
Organizations
- Office of Naval Research
- Trustees of Princeton University
- United States Navy