公开(公告)号：JP2003224509A

公开(公告)日：2003-08-08

申请号：JP2002021633

申请日：2002-01-30

Applicant: DENSO CORP

Inventor： NUMATA AKISHI

IPC: H04M1/60 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To reduce mutual interference between short range radio communication equipment for a vehicle and a plurality of other radio equipment. SOLUTION: This short range radio communication equipment for a vehicle has a limited characteristic so that spurious emission intensity may not be each maximum value or more with respect to each operating frequency and each frequency band where the each maximum value of spurious emission intensity is set in accordance with the each operating frequency and the each frequency band of portable telephones, a radio wave beacon receiver, a TV receiver and a GPS receiver as recognized from figure 3. The short range radio communication equipment for the vehicle has a limited reception characteristic that blocking performance may not be each minimum value or less so as to prevent transmission radio waves of the other radio equipment from interfering with the short range radio communication equipment. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2000059275A

公开(公告)日：2000-02-25

申请号：JP22059998

申请日：1998-08-04

Applicant: DENSO CORP

Inventor： NUMATA AKISHI

IPC: H01Q1/24 ,  H04B7/08 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To stably perform reception by a subantenna with high sensitivity irrelevantly to the extension/contraction state of a main antenna. SOLUTION: One feeder Ls1 between a couple of feeders Ls1 and Ls2 reaching a selection switch part 20 from a main antenna 12, the main antenna 12 is connected while drawn out of a portable telephone main body and to the other feeder Ls2, phase shifters 26a and 26b which are so set that the coupling quantity between both the antennas 12 and 14 is minimized (namely, the reception sensitivity of the subantenna 14 is maximized) are connected while the main antenna 12 is stored in the main body. According to the extension/ contraction state of the main antenna 12 detected through a detection switch 30, the feeders connected to the main antenna 12 are switched by a changeover switch 32 to enable the subantenna 14 to perform reception always with high sensitivity.

公开(公告)号：JP2003298727A

公开(公告)日：2003-10-17

申请号：JP2002094374

申请日：2002-03-29

Applicant: Denso Corp ,  株式会社デンソー

Inventor： MORI KENICHI ,  NUMATA AKISHI

IPC: B60R11/02 ,  H04M1/60 ,  H04M1/725 ,  H04W84/10 ,  H04W88/02 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To carry out telephone call with hands free through a portable telephone adequately.
SOLUTION: A Bluetooth communication system 2 for carrying out Bluetooth communication with a portable telephone 16 is mounted near to a ceiling 6a of a room 6 of a vehicle to carry out telephone call with hands free through a portable telephone 16. Even when a passenger on the rear seat carries the portable telephone 16, or the portable telephone 16 is left unattended on the rear seat, there is no obstacle for blocking electric waves between the portable telephone 16 and the Bluetooth communication system 2, and the telephone call by the portable telephone 16 can be carried out adequately with hands free.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：通过便携式电话机免费进行电话呼叫。 解决方案：用于与便携式电话机16进行蓝牙通信的蓝牙通信系统2被安装在车辆的房间6的天花板6a附近，通过便携式电话16免费进行电话呼叫。即使 后排座椅上的乘客携带便携式电话机16，或便携式电话机16无人值守地放置在后排座椅上，在便携式电话机16和蓝牙通信系统2之间没有障碍物阻塞电波，并且电话呼叫由 便携式电话机16可以用手自由地进行。 版权所有（C）2004，JPO

公开(公告)号：JP2002280950A

公开(公告)日：2002-09-27

申请号：JP2001078183

申请日：2001-03-19

Applicant: DENSO CORP

Inventor： NUMATA AKISHI

IPC: H04M1/02 ,  H04B7/26 ,  H04M1/00 ,  H04M1/11 ,  H04M1/73 ,  H04M1/738 ,  H04W4/04 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To provide a stationary side communication system, that can ensure security in the case of conducting near distance wireless communication with a mobile wireless phone and suppress unwanted power consumption to the utmost. SOLUTION: The transmission power and the reception sensitivity of a Bluetooth communication section 27 of the stationary side communication system 12 are adjusted, so that communication is executed only for a Bluetooth communication section 24 of a mobile phone 3 placed on a placing base 25.

公开(公告)号：JP2002271252A

公开(公告)日：2002-09-20

申请号：JP2001066938

申请日：2001-03-09

Applicant: DENSO CORP

Inventor： NUMATA AKISHI

IPC: H04M1/00 ,  H04B7/26 ,  H04M1/725 ,  H04M1/73

Abstract: PROBLEM TO BE SOLVED: To provide a short-distance radio communication system wherein a user can obtain satisfactory feeling of usage about a short distance radio communication means, unnecessary power consumption of a portable radio telephone set is restrained to a minimum, and security of high level can be ensured. SOLUTION: When the user, having the portable telephone set 11, is positioned in a transmission area of a weak radio wave transmitting part 27 disposed in fixed side communication equipment 12 installed in a car compartment of a vehicle 1, and a telephone communication part 16 of the telephone set 11 receives a radio wave signal transmitted from the transmitting part 27, a CPU 18 of the telephone set 11 closes a switch 25 and applies a power source Vcc to a Bluetooth communication part 24.