Open AccessMeasurement of the rotational sense and velocity of an object using OAM wave in the radio‐frequency band
Author(s) -
Brousseau C.,
Mahdjoubi K.,
Emile O.
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.0942
Subject(s) - angular momentum , physics , angular velocity , rotation (mathematics) , doppler effect , optics , orbital angular momentum of light , rotational speed , acoustics , object (grammar) , computational physics , total angular momentum quantum number , classical mechanics , computer science , mathematics , geometry , quantum mechanics , artificial intelligence
A method is presented to improve the determination of the rotational velocity of an on‐axis spinning object. It uses the Orbital Angular Momentum (OAM) of an electromagnetic wave at 2.47 GHz, and measures the rotational Doppler frequency shift of a reflected wave. From this shift, the rotational velocity and the direction of rotation can be directly estimated with very good accuracy.