Method for generating radio frequency orbital angular momentum beams based on annular traveling wave antenna

Abstract

The invention relates to a method for generating radio frequency orbital angular momentum beams based on an annular traveling wave antenna. According to the method, the annular traveling wave antenna is in a circular ring shape in spatial distribution, a circular ring is in symmetry with the respect of a Z-axis, all excitation source points on the circular ring are the same in range, the phase position of the circular ring meets exp (il) distribution along the circumference, the antenna excitation sources spread in a traveling wave mode on the circular ring, the radiation of the annular traveling wave antenna in the space can generate radio frequency OAM beams with the same order as the phase position distribution 1, the distribution of all phase position points on the circular ring is adjusted, and radio frequency OAM beams with different orders 1 can be generated. The method for generating the radio frequency orbital angular momentum beams based on the annular traveling wave antenna can be used in an OAM wireless communication system and is integrated with an existing communication technology, and the capacity of a communication system is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of OAM wireless communication, and relates to a method for generating a radio frequency OAM beam based on a ring traveling wave antenna. Background technique [0002] As the world enters the mobile Internet era, the spectrum gap for mobile communication services is becoming increasingly serious. Due to the limited high-quality spectrum resources in the low frequency band, it is difficult to meet the new demands of mobile communications only by allocating new spectrum. In this case, it is particularly important to develop new technologies to improve the efficiency of the use of bits / Hz. At present, people have done a lot of research on expanding information capacity resources based on the dimensions of frequency spectrum, phase, and amplitude of electromagnetic waves, such as improving the spectrum utilization rate of a new intelligent wireless communication technology - cognitive radio; improving the spectr...

AI Technical Summary

Problems solved by technology

So far, most OAM beam generation methods come from the circular array antenna idea designed by Thide et al. in 2007, but the order of the OAM beam generated by this method is limited by the number of circular array antennas. Assuming that the number of circular array antennas is N, the OAM beam order l generated by it must be less than N / 2, so it is of great significance to seek a simple and feasible radio frequency OAM beam generation method for future radio frequency OAM high-speed communication

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