Overview of Doppler Technology Based on Vortex Electromagetic Wave

According to the basic theory of electromagnetic vortex wave, the properties of electromagnetic vortex waves are simulated and analyzed. Based on the uniform circular array model, the aliasing characteristics of the square Bessel function at the pitch Angle are verified. The principles and properties of linear Doppler, rotary Doppler and micro-Doppler are compared to show the advantages and disadvantages of vortex detection. The research progress of electromagnetic vortex wave Doppler detection in recent years is summarized, and the detection ability is verified by simulation. At the same time, the key problems in rotary Doppler and micro-Doppler detection are summarized, and the direction of further research is pointed out.