1、6G White Paper on Metamaterials for Information Technology China Mobile Research Institute Institute of Electromagnetic Space Science and Technology,Southeast University 2022 content 1 Introduction.3 2 Metamaterials for Antennas .5 3 Intelligent reflecting surfaces.6 3.1 Principle.6 3.2 Operation mo

2、des.8 3.3 Application scenarios.12 3.4 Performance Testing.13 4 Beamforming metasurface base station.21 4.1 Principle.21 4.2 Challenges.22 5 Direct modulation metasurface base station.23 5.1 Principle.23 5.2 Challenges.24 6 Summary.26 7 Contributors.26 References.27 1 Introduction Metamaterials were

3、 first proposed in 1968.Since then,they have received extensive attentions.In the English word of“metamaterial”,the prefix“meta”means beyond and exceed,emphasizing the fact that metamaterials have many properties natural materials do not have.Note that those“meta”properties are not due to the innate

4、 physical or chemical properties of materials themselves,but rather the results of engineered novel structures which allow them to possess certain capabilities that transcend natural materials.Because of these,metamaterials are widely used in the fields of optics,acoustics,heat,electromagnetics,and

5、structural mechanics.Electromagnetic metamaterials(hereinafter shortened as metamaterials)are designed and manufactured according to electromagnetic requirements.Hence,they are also called artificial electromagnetic media.Metamaterials consist of well-arranged artificial microstructures following ce

6、rtain rules(periodic or aperiodic).Each microstructure is composed of dielectric materials or dielectric materials plus metals,with the size at subwavelength level(0.1-0.5 wavelengths).At the beginning,the design of metamaterials followed the concept of equivalent medium which led to the earliest pr