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Patent Searching and Data


Title:
周期的な電磁的構造体
Document Type and Number:
Japanese Patent JP2005538629
Kind Code:
A
Abstract:
This invention relates to periodic electromagnetic structures ( 20 ) for use over a relatively large range of frequencies. In particular, this invention relates to microwave applications, such as antennas and low reflectivity structures. A periodic electromagnetic structure ( 20 ) is provided that comprises an array of conducting LC elements ( 22;22 a ,22 b ;42;52;68 ) in superposition with a frequency-dependent dielectric ( 30;44;54;70 ) whose permittivity and/or permeability varies according to the frequency of radiation incident thereon such that the resonant frequency of the LC elements ( 22;22 a ,22 b; 42;52;68 ) follows the frequency of the incident radiation.

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Inventors:
Seddon, Niger
Haku, Sajad
Application Number:
JP2004535631A
Publication Date:
December 15, 2005
Filing Date:
September 03, 2003
Export Citation:
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Assignee:
BAE SYSTEMS plc
International Classes:
H01Q15/14; H01Q1/24; H01Q15/00; H01Q17/00; (IPC1-7): H01Q15/14; H01Q17/00
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto