Title:
【発明の名称】車両内通信装置
Document Type and Number:
Japanese Patent JP2513898
Kind Code:
B2
Abstract:
PURPOSE:To realize distinct call by continuously providing an antenna system, through which the call is carried out between portable radio machines, with each other or a portable radio machine and a fixed radio machine on plural connected mobile objects. CONSTITUTION:Linear antennas 2 are continuously provided on the mobile objects 1, and communication in mobile objects is performed through the linear antenna 2. Consequently, an approximately uniform reception electric field is obtained by using the antenna 2 at the time of mutual speaking between portable radio machines 3 whatever these portable radio machine 3 are in the same vehicle 1 as mobile objects or in different vehicles 1, because the antenna 2 has such structure that the extent of coupling to an antenna 4 for portable radio machine is approximately fixed and the extent of attenuation due to passage through the antenna 2 of a high frequency signal can be amplified by a repeater 8 for signal amplification. Thus, distinct call is available and data is transmitted with a good quality.
Inventors:
MATSUMOTO KAZUOMI
KONO TETSUYA
FUKAZAWA AKIO
SHIRATA MASARU
NAKAMURA TADASHI
KONO TETSUYA
FUKAZAWA AKIO
SHIRATA MASARU
NAKAMURA TADASHI
Application Number:
JP9532690A
Publication Date:
July 03, 1996
Filing Date:
April 11, 1990
Export Citation:
Assignee:
TOKAI RYOKAKU TETSUDO KK
MITSUBISHI DENKI KK
MITSUBISHI DENKI KK
International Classes:
B61D37/00; H04B7/26; H04B5/00; H04W28/00; H04W84/10; (IPC1-7): H04B5/00; B61D37/00
Domestic Patent References:
| JP6278691A | ||||
| JP6368235U |
Attorney, Agent or Firm:
Takada Mamoru