title: A meta-substrate to enhance the bandwidth of metamaterials.
abstract: We propose the concept of a meta-substrate to broaden the bandwidth of left-handed metamaterials. The meta-substrate, which behaves like an inhomogeneous magnetic substrate, is composed of another kind of magnetic metamaterials like metallic closed rings. When conventional metamaterial rings are printed on this kind of meta-substrate in a proper way, the interaction of the metamaterials units can be greatly enhanced, yielding an increased bandwidth of negative permeability. An equivalent circuit analytical model is used to quantitatively characterize this phenomenon. Both numerical and experimental demonstrations are carried out, showing good agreement with theoretical predictions.
authors.affiliation: 1] The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China [2] Deptment of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Hongsheng
authors.initials: H
authors.lastname: Chen
authors.affiliation: 1] The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China [2] Deptment of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Zuojia
authors.initials: Z
authors.lastname: Wang
authors.affiliation: 1] The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China [2] Deptment of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Runren
authors.initials: R
authors.lastname: Zhang
authors.affiliation: School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China.
authors.forename: Huaping
authors.initials: H
authors.lastname: Wang
authors.affiliation: 1] The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou 310027, China [2] Deptment of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Shisheng
authors.initials: S
authors.lastname: Lin
authors.affiliation: School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China.
authors.forename: Faxin
authors.initials: F
authors.lastname: Yu
authors.affiliation: Network of Excellent Retired Scientists and Institute of Microstructure Technology, Karlsruhe Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany.
authors.forename: Herbert O
authors.initials: HO
authors.lastname: Moser