Structure Radio Beam Construction in Azimuthal Domain

Zhixia Wang,Zelin Zhu,Shilie Zheng,Xiaowen Xiong,Xianbin Yu,Xiaofeng Jin,Yuqi Chen,Xianmin Zhang

doi:10.1109/access.2020.2964833

Abstract

Structure radio beams with diverse radiation patterns exhibit huge potentials in many applications. In this paper, we propose a plane spiral orbital angular momentum (PS-OAM) based structure radio beam construction scheme, in which several PS-OAM waves are superposed together to acquire the anticipated radiation pattern and phase distribution in azimuthal domain. Firstly, some typical shapes of the radiation patterns are demonstrated. Then, the properties of this kind of structure radio beam, for example diversity, periodicity, vorticity and directional gain are analysed in detail from mathematical analysis and simulation verification. Finally, a proof of principle experiment is carried out at 10 GHz using a multi PS-OAM antenna to further testify the feasibility of the structure radio beam construction. The interesting properties provided by structure radio beams would offer promising solutions to radar imaging, smart antenna, massive multiple input multiple output (MIMO) and spatial modulation multiple input multiple output (SM-MIMO).

Highlights

With the rapid development of Internet and the popularization of intelligent terminals, especially the newly rise of automatic driving and smart homes, people’s requirement for wireless communication rate has become more and more increased
Diversity technologies like polarization diversity, spatial diversity and radiation pattern diversity are commonly used in MIMO systems to improve the efficiency of spectrum utilization [2]
We propose to use plane spiral orbital angular momentum (PS-OAM) waves as eigen-modes for EM waves to construct structure radio beams with arbitrary radiation patterns and phase distributions, and give a complete theoretical guidance on the construction method

Summary

INTRODUCTION

With the rapid development of Internet and the popularization of intelligent terminals, especially the newly rise of automatic driving and smart homes, people’s requirement for wireless communication rate has become more and more increased. A new wireless communication architecture called directly digital modulation (DDM) has been proposed in [5], it modulates digital information on various far-field radiation patterns, and calculates Euclidean distances between each two radiation patterns to establish distance matrix, and uses this matrix to demodulate the information These communication systems are all relied on pattern reconfigurable antennas to generate diverse radiation patterns, such as patterns with low correlations or those with various shapes. Dr Andrés has ever proposed using spherical vector wave expansion multipole modes to provide beam constructing [7], and further discussed field eigen-mode beamforming for diversity in MIMO applications[8],[9] The rest of the paper is organized as follows: Firstly, that structure radio beams with arbitrary angular radiation patterns and controllable phase distributions can be constructed by using PS-OAM waves is theoretically analyzed. A proof of principle multi PS-OAM antenna operating at 10 GHz is simulated and measured to verify the analysis

CONSTRUCT STRUCTURE RADIO BEAM

UNIFORM AMPLITUDE AND SAME PHASE

DIFFERENT AMPLITUDE AND REGULAR PHASE

PERIODICITY

PRINCIPLE PROOF OF STRUCTURE RADIO BEAM

EXPERIMENT OF CONSTRUCTING STRUCTURE RADIO BEAM