Bi-Target Tracking Based on Vortex Wave With Orbital Angular Momentum

Abstract

Abstract-This paper studies the application of vortex wave with orbital angular momentum (OAM) in the radar. The vortex waves can have eigenstates or modes with different integer topological charges, which are orthogonal to each other. The eigenstates with topological charges of 0, −1 and 1 were utilized in this paper. The radar transmitted the pulse with topological charge of 0 and received echoes with topological charges of 0, −1 and 1. The receiver can process the signals received by these orthogonal modes to obtain the azimuth and elevation angles of the two targets in a same range gate. Compared with the traditional mono-pulse radar only with sum beam and difference beam, this vortex-wave-based radar can track two targets in principle. This is meaningful for the application of the vortex wave.

Finite-aperture Microwave Bessel Beams with Vortex Twisting, Fracturing, and Dynamic Phase-shift Control

“…Optical communication is another area where the OAM beams can increase the capacity of channels [2,3], enhance the encoding, and provide other benefits [4]. Microwave vortex beams are also of interest for wireless communication [5][6][7] and radars [8][9][10].…”

A Novel Image Formation Method for Electromagnetic Vortex Sar With Orbital-Angular-Momentum

“…A beam steering method is proposed in [17] with UCA, and 2-D target imaging is achieved by an l p regularized least-squares algorithm. In [18], two targets in the same range gate are tracked, and the azimuth and elevation angles are obtained by using three different topological charges. However, the above mentioned imaging methods are all based on a fixed radar system, where the antenna system is static, and a number of OAM modes are needed for its effective operation.…”