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1. 发明专利

JPH11214904A BALANCED-TO-UNBALANCED CONVERTER 失效
公开(公告)号：JPH11214904A
公开(公告)日：1999-08-06
申请号：JP2674198
申请日：1998-01-22
申请人： NIPPON SOKEN , DENSO CORP
发明人： KONO TATSUO , FUKUI SHINJI , MIZUNO SATORU
IPC分类号： H01P5/10
摘要： PROBLEM TO BE SOLVED: To improve the characteristics of a substrate type balanced-to- unbalanced converter. SOLUTION: A pair of line patterns 21 and 22 are formed on both planes 1a and 1b of a substrate 1 and they are made into a converting part T, which performs conversion between a balanced signal and an unbalanced signal. Insertion loss is reduced and also the phase difference between balanced outputs which is outputted to balanced terminals 25 and 26 is suppressed by making one line pattern 22 three to eight times as wide as the other line pattern 21.

2. 发明专利

JPH09200101A DIVERSITY RECEIVER 失效
公开(公告)号：JPH09200101A
公开(公告)日：1997-07-31
申请号：JP613896
申请日：1996-01-17
申请人： NIPPON SOKEN
发明人： FUKUI SHINJI , KONO TATSUO
IPC分类号： H04B7/08
摘要： PROBLEM TO BE SOLVED: To provide the diversity receiver by which an optimum reception system is selected. SOLUTION: The receiver has a reception system consisting of an antenna 1, a receiver 3 and a demodulator 4 and a reception system consisting of an antenna 5, a receiver 7 and a demodulator 8. A microcomputer 19 detects a reception signal level at a prescribed time interval and selects a reception system based on the result of detection to extract reception data for a prescribed time. In this case, the microcomputer 19 calculates a gradient of are envelope at the start of reception data extraction based on a signal level of the envelope of the reception signal at the start of reception data extraction and just before the start and estimates a reception signal level at the end of reception data extraction based on the gradient of the envelope of the start of reception data extraction and selects a reception system based art the estimated signal level at the end of extraction of the reception data.

3. 发明专利

JPH10234080A MOBILE COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH10234080A
公开(公告)日：1998-09-02
申请号：JP3507997
申请日：1997-02-19
申请人： NIPPON SOKEN
发明人： HIRAYAMA MASAHITO , KONO TATSUO
IPC分类号： H04W48/04 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To provide the mobile communication equipment that limits the use of a terminal equipment in an operation limit area with a new configuration. SOLUTION: A mobile communication terminal equipment detector as a transmitter detects it that a mobile communication terminal equipment 10 approaches an operation limit area and sends a radio wave with a prescribed code of a frequency band used for communication with the radio base station added thereto to the mobile communication terminal equipment 10. Upon the receipt of the radio wave from the mobile communication terminal equipment, when the code in the received radio wave denotes the prescribed code, the processing of limiting the use of the mobile communication terminal equipment 10 such as warning on an indicator, sound warning or interruption of a drive power supply to electronic components or the like is executed by the mobile communication terminal equipment 10.

4. 发明专利

JPH10163942A DIVERSITY RECEPTION SIGNAL SYNTHESIZER 失效
公开(公告)号：JPH10163942A
公开(公告)日：1998-06-19
申请号：JP31370496
申请日：1996-11-25
申请人： NIPPON SOKEN , DENSO CORP
发明人： FUKUI SHINJI , KONO TATSUO , KODERA MASAO
IPC分类号： H04L27/22 , H04B7/08
摘要： PROBLEM TO BE SOLVED: To provide a diversity reception signal synthesizer capable of easily obtaining synthetic reception without performing a complex operation from a scalar value which is the output of a modem for demodulation or the like. SOLUTION: Signals received by respective antennas 1a, 2a, 3a and 4a are passed through receivers 1b, 2b, 3b and 4b and the modems 1, 2c, 3c and 4c for the demodulation and encoded. A synchronization circuit 5 aligns the phase of the digital signals of reception data after encoding in respective reception systems and a pattern judgement circuit 6 judges the pattern of the reception data after encoding in the respective reception systems. A data replacement circuit 7 replaces the reception data in the respective reception systems after encoding corresponding to a replacement rule corresponding to the judged pattern and a weighting operation circuit 8 performs a weighting operation corresponding to the envelope level of reception signals for the reception data after data replacement in the respective reception systems. A data inverse replacement circuit 9 inversely replaces the reception data after the weighting operation corresponding to the opposite replacement rule of the replacement rule.

5. 发明专利

JP2001127650A COMMUNICATION APPARATUS 失效
公开(公告)号：JP2001127650A
公开(公告)日：2001-05-11
申请号：JP30426099
申请日：1999-10-26
申请人： NIPPON SOKEN , DENSO CORP
发明人： FUKUI SHINJI , KONO TATSUO , MIZUNO SATORU
IPC分类号： H01P5/10 , H03F3/26 , H03F3/60 , H04B1/04 , H04B3/30 , H04B15/00
摘要： PROBLEM TO BE SOLVED: To provide a communication apparatus that is hardly affected by an unnecessary electromagnetic onto a balance/unbalance converter. SOLUTION: The communication apparatus has a push-pull circuit 16, balance/unbalance converters 13a, 13b connected to its input and output, and the balance/unbalance converters 13a, 13b are formed to be L-shape. Since the size of the balance/unbalance converters 13a, 13b in its length direction with respect to the sensitivity direction of an unnecessary electromagnetic wave can be decreased, the resonance frequency of the balance/unbalance converters 13a, 13b is shifted toward high frequencies. Thus, the frequency of a interference wave is shifted toward higher frequencies than a substantial objective signal frequency.

6. 发明专利

JPH10322440A COMMUNICATION EQUIPMENT FOR VEHICLE 失效
公开(公告)号：JPH10322440A
公开(公告)日：1998-12-04
申请号：JP12597097
申请日：1997-05-15
申请人： NIPPON SOKEN
发明人： HIRAYAMA MASAHITO , KONO TATSUO
IPC分类号： H04M1/60 , H04B7/26 , H04M1/66 , H04M1/67
摘要： PROBLEM TO BE SOLVED: To provide a communication equipment by which an accident resulting from one-hand driving or the like by a driver using the communication terminal equipment in a vehicle is prevented. SOLUTION: A communication terminal equipment such as a cellular telephone set or a PHS is carried by the user and mounted on a cradle in a cabin so as to allow the user to make hand-free speech using a microphone 24 that is installed in the cabin. The on-vehicle equipment 20 mounted in the cabin is provided with an antenna 21 or the like and has a transmission function. The on-vehicle equipment 20 sends a signal denoting limit of the equipment when the communication terminal equipment is not mounted on the cradle based on a signal from a cradle mount switch 28. The communication terminal equipment receiving the signal from the on-vehicle equipment 20 stops its transmission function or disconnects the antenna 21 and a transmission section 22 to prevent transmission of a radio wave from the antenna 21, thereby executing the use limit processing.

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