Computer Sciences and Information Technology
Title : | Generation of non-diverging circular airy orbital angular momentum beams for next generation wireless communication technology. |
Area of research : | Computer Sciences and Information Technology |
Principal Investigator : | Dr. Ashwini Sawant, Indian Institute Of Technology (IIT) Guwahati, Assam |
Timeline Start Year : | 2022 |
Timeline End Year : | 2024 |
Contact info : | ashwinisawant@iitg.ac.in |
Equipments : | "Waveguide Detector
Waveguide Probes
Coax to waveguide adapter
Waveguide Mountings and Stages
Guassian Horn antenna" |
Details
Executive Summary : | The demand for high data transmission in wireless communication systems is increasing, and researchers are exploring unconventional methods to boost data transmission rates at millimetre wave frequencies. Orbital angular momentum (OAM) multiplexing is one such technique that theoretically supports infinite channel capacity due to its infinite orthogonal modes. However, the divergence of OAM beams at millimeter wave frequencies is a major bottleneck, as the intrinsic nature of radio waves (RF) and the presence of vortices at the center of OAM beams result in highly diverging properties. This proposed work aims to generate circular airy OAM beams at radio frequencies using transmissive phase transforming metamaterial structure. The propagation dynamics of circular airy beams (CABs) in free space will be investigated using the angular spectrum method (ASM). A metamaterial structure will be designed to convert the incoming Gaussian beam into non-diffracting circular airy OAM beams. Comparing the propagation distance obtained through conventional OAM beams and CABs with OAM property will be conducted to prove their worthiness for OAM wireless communication. The experimental setup will consist of a vector network analyzer (VNA) generating a 28 GHz signal, connected to a Gaussian horn antenna emitting a Gaussian beam in free space. The propagation dynamics of the generated circular airy OAM beam will be measured by an open-ended probe placed on a two-dimensional translation stage. The self-focussing property of the generated beam will be observed. The project aims to provide a better understanding of the propagation dynamics of circular airy OAM beams in free space at radio frequencies. |
Total Budget (INR): | 29,97,300 |
Organizations involved