6 papers
Near-Field Sampling for Line Sources
Jiawang Li, Mats Gustafsson
Near-field sampling seeks to represent electromagnetic fields between transmitting and receiving regions using a minimal number of measurement points while preserving the dominant…
Degrees of Freedom and Beamforming for Large Intelligent Surfaces
Jiawang Li, Alireza Saberkari, Buon Kiong Lau +1
Spatial degrees of freedom (DoF), sampling, and beamforming are fundamental to multi-user large intelligent surfaces (LISs), where electromagnetic fields must be shaped, resolved,…
Properties of Near Field Focusing for Cylindrical Dipole Arrays in Enclosed Array Volume
Jiawang Li
Motivated by large intelligent surface applications, the electric field properties of near field focusing using phase conjugation method are analyzed for cylindrical dipole arrays.…
On Properties of Phase-Conjugation Focusing for Large Intelligent Surface Applications -- Part I: Vertical Polarization
Jiawang Li
Large intelligent surface (LIS) is one promising path to leverage 6G performance in sub-10 GHz bands. This two-part paper explores the properties of phase-conjugation focusing for…
On Properties of Phase-Conjugation Focusing for Large Intelligent Surface Applications -- Part II: Horizontal Polarization
Jiawang Li
Near-field focusing (NFF) forms the basis for several applications of large intelligent surface (LIS) in sub-10 GHz bands, including wireless communications, wireless power transfe…
Near-Field Collinear Dipole Array Design with Dual-Polarization Operation for Wireless Power Transfer
Jiawang Li
A large intelligent surface (LIS) is a promising approach to enhancing 6G performance in sub-10 GHz frequency bands. An analysis of the horizontal dipole linear array reveals that…