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Patent Searching and Data


Title:
TRANSMITTING ANTENNA
Document Type and Number:
Japanese Patent JP2008141566
Kind Code:
A
Abstract:

To provide a transmitting antenna by which information other than a desired object is not read out by limiting the propagation region of radio waves.

A pair of vertical radiowave absorbing side walls 2 and 3 which control the directionality of radio waves emitted from the antenna 8 are arranged in such a way that they are protruded from the proximity of both end edges of the antenna 8. Further, a half-value angle in plain view of the radio waves emitted form the antenna 8 is reduced by the pair of radiowave absorbing side walls 2 and 3. The reduced half-value angle after control is set to 40 or smaller.


Inventors:
Kudo, Toshio
Kashiwabara, Kazuyuki
Fukui, Masahiro
Hosoya, Katsunobu
Nishida, Nobukatsu
Sasaki, Kiyoyuki
Application Number:
JP2006000326709
Publication Date:
June 19, 2008
Filing Date:
December 04, 2006
Export Citation:
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Assignee:
MITSUBISHI CABLE IND LTD
SAGAWA INSATSU KK
NISHIDA NOBUKATSU
International Classes:
H01Q17/00; G06K17/00; H01Q1/52
Domestic Patent References:
JP2003178341A2003-06-27
JPH0575338A1993-03-26
Attorney, Agent or Firm:
中谷 武嗣