Equivalent-Circuit Model with Retarded Electromagnetic Coupling for Meta-Atoms of Wired Metallic Spheres

• OHISHI Katsuya

  Department of Electrical Engineering, Kyoto University

• HISAKADO Takashi

  Department of Electrical Engineering, Kyoto University

• MATSUSHIMA Tohlu

  Department of Electrical Engineering, Kyoto University

• WADA Osami

  Department of Electrical Engineering, Kyoto University

Abstract

This paper describes the equivalent-circuit model of a metamaterial composed of conducting spheres and wires. This model involves electromagnetic coupling between the conductors, with retardation. The lumped-parameter equivalent circuit, which imports retardation to the electromagnetic coupling, is developed in this paper from Maxwell's equation. Using the equivalent-circuit model, we clarify the relationship between the retardation and radiation loss; we theoretically demonstrate that the electromagnetic retardation in the near-field represents the radiation loss of the meta-atom in the far-field. Furthermore, this paper focuses on the retarded electromagnetic coupling between two meta-atoms; we estimate the changes in the resonant frequencies and the losses due to the distance between the two coupled meta-atoms. It is established that the dependence characteristics are significantly affected by electromagnetic retardation.

Journal

• IEICE Transactions on Electronics

  IEICE Transactions on Electronics E101.C (12), 923-930, 2018-12-01

  The Institute of Electronics, Information and Communication Engineers

Keywords

• metamaterial
• meta-atom
• equivalent-circuit model
• retardation
• radiation
• electromagnetic coupling

Details

• CRID: 1390282763072771968
• NII Article ID: 130007539370
• DOI: 10.1587/transele.e101.c.923
• ISSN: 17451353
• ISSN: 09168524
• HANDLE: 2433/252318
• Web Site: https://www.jstage.jst.go.jp/article/transele/E101.C/12/E101.C_923/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed