Title:
囲われた空間内の励振器システムと通信方法
Document Type and Number:
Japanese Patent JP2004523175
Kind Code:
A
Abstract:
An exciter system (10) is provided for use in facilitating electromagnetic communication within an enclosed space (12). The system (10) includes an exciter (26) which may be in the form of a three dimensional hemispherical exciter (28) or a two dimensional planar sector exciter (30) depending on the size of the associated structure and the power requirements of operation. The exciter system (10) operates in conjunction with a hub/controller network (44). The exciter system (10) is adapted to induce a quasi-static evanescent field (20) within the space and to thereby enable communications using the evanescent field (20) at frequencies within an operational frequency range determined by the characteristics of the space. The exciter (26) is mounted in opposition to a portion of a conductive framework (18) within the enclosed space, and is separated therefrom. In operation, a coaxial connector (48) connects the exciter (26) to the hub/controller network (44) with the center conductor (50) connecting at a feed point (66) to the exciter (26) while the shield conductor (52) is connected to the opposing conductive framework (18). In some embodiments a post (40) acts as a curtain to enhance performance at lower frequencies.
Inventors:
George Gee Chadwick
Application Number:
JP2002568882A
Publication Date:
July 29, 2004
Filing Date:
July 19, 2001
Export Citation:
Assignee:
Kokomo MB Communications Inc.
International Classes:
H01Q1/44; H01Q1/00; H01Q1/22; H01Q1/46; H01Q1/52; H04B3/54; H04B5/00; H04B7/26; H04H20/63; (IPC1-7): H04B7/26
Attorney, Agent or Firm:
Yoshio Kosugi
Masaki Yamada
Ishibashi
Mikami Yui
Akihiro Yoshinobu
Masaki Yamada
Ishibashi
Mikami Yui
Akihiro Yoshinobu