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Patent Searching and Data


Title:
INDUCTIVE RADIO ANTENNA AND INDUCTIVE COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JPH10256958
Kind Code:
A
Abstract:

To eliminate noise disturbance in a mobile station antenna for a moving body to eliminate break points of a reception level at a transposition point of parallel two-wire induction lines.

Antennas 6 and 7 are closely coupled just under parallel two- wire induction lines 4 (L1) and 5 (L2) except at a transposition point A and detect the magnetic fields generated by currents which flow to induction lines 4 and 5 and have 180° phase difference, and antennas 6 and 7 are connected in opposite directions to obtain a synthesized level. An antenna 8 having the shape of the figure 8 is provided for antennas and is coupled only at the transposition point A of induction lines 4 and 5 to obtain a reception level. The synthesized level of antennas 6 and 7 and the level of the antenna 8 are synthesized to obtain a synthesized reception level.


Inventors:
IGARASHI KEISUKE
Application Number:
JP5636697A
Publication Date:
September 25, 1998
Filing Date:
March 11, 1997
Export Citation:
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Assignee:
KOKUSAI ELECTRIC CO LTD
International Classes:
H01Q7/00; H04B5/00; H04B5/02; H04B7/26; H01Q1/32; (IPC1-7): H04B5/00; H01Q1/32; H01Q7/00; H04B5/02; H04B7/26
Attorney, Agent or Firm:
Masami Akimoto