Title:
VEHICLE-MOUNTED COMMUNICATIONS SYSTEM AND ARRANGEMENT METHOD OF VEHICLE-MOUNTED ANTENNA
Document Type and Number:
Japanese Patent JP2007060724
Kind Code:
A
Abstract:
To provide a vehicle-mounted communications system which can communicate without reducing radiant efficiency of an antenna, even when communicating at a lower frequency than a cut-off frequency, and an arrangement method of antenna for arranging the antenna so as not to reduce radiant efficiency of the antenna, even when communicating at the low frequencies.
A radio-wave frequency output from a communication means is set lower than the cut-off frequency of a wave guide, when a frame of an opening part of the vehicle is looked upon as the wave guide. For an antenna used in the vehicle-mounted communication system which uses the above radio-wave frequency, a loop antenna 29a is employed and arranged along the body of the vehicle.
More Like This:
Inventors:
TANAKA SHINGO
HORIUCHI MANABU
HORIUCHI MANABU
Application Number:
JP2006319171A
Publication Date:
March 08, 2007
Filing Date:
November 27, 2006
Export Citation:
Assignee:
YAZAKI CORP
International Classes:
H01Q1/22; B60R11/02; H01Q7/00; H01Q9/40; H01Q13/08
Attorney, Agent or Firm:
Hideo Takino
Sadao Matsumura
Isamu Kakiuchi
Fumio Takino
Sadao Matsumura
Isamu Kakiuchi
Fumio Takino