title: Transformation-optical Fan-beam Synthesis.
abstract: Gradient-index dielectric lenses are generated based on the coordinate transformation by compressing the homogeneous air spaces quasi-conformally towards and outwards the primary source. The three-dimensional modeling is then performed through revolving the prescribed transformational media 180 degrees around the focal point to reach the architecture of barrel-vaults. It is found that all these two- and three-dimensional transformation-optical designs are capable of producing fan-beams efficiently over a broad frequency range with their main lobes possessing the narrow beamwidth in one dimension and the wide beamwidth in the other, while having the great ability of the wide angular scanning. Finally, we propose to construct such four types of fan-beam lenses through multiple-layered dielectrics with non-uniformed perforations and experimentally demonstrate their excellent performances in the fan-beam synthesis.
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: Rui
authors: R
authors: Yang
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: Xianghui
authors: X
authors: Kong
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: Hui
authors: H
authors: Wang
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: He
authors: H
authors: Su
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: Zhenya
authors: Z
authors: Lei
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: Jing
authors: J
authors: Wang
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: Aofang
authors: A
authors: Zhang
authors: School of Electronic Engineering. Xidian University, Xi'an 710071, Peoples R China.
authors: Lei
authors: L
authors: Chen