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1. 发明专利

JPH1138056A ESTIMATING SYSTEM FOR ENVIRONMENTAL CHARACTERISTIC OF ELECTROMAGNETIC FIELD IN WIRELESS TERMINAL MACHINE 失效
公开(公告)号：JPH1138056A
公开(公告)日：1999-02-12
申请号：JP20978397
申请日：1997-07-18
申请人： KOKUSAI ELECTRIC CO LTD , ARAI HIROYUKI
发明人： ONISHI NAOKI , SASAKI KANEMI , ARAI HIROYUKI
IPC分类号： G01R29/08 , G01R31/00 , H04B17/00 , H04B17/391
摘要： PROBLEM TO BE SOLVED: To carry out sufficient characteristic estimation of a wireless terminal machine by an indoor simulation through a simple system formation. SOLUTION: Transmitting antennas 23a-23c are arranged in a sealed box 20 and a wireless terminal machine 22 being estimated object is also installed, and the environmental characteristic in electromagnetic field of a signal which is transmitted from the transmitting antennas 23a-23c and received by the terminal machine 22 is therefore reproduced. The terminal machine 22 is provided with a means for transmitting an information signal about the received signal of the strength of an electric field as a radio wave, and in addition, a receiving antenna 24 to receive a received information signal transmitted from the terminal machine 22 is provided in the sealed box 20. The received information signal of the terminal machine 22 in the sealed box 20 is inputted into an estimation control means composed of a personal computer 26 provided outside the sealed box 20, and a measurement excellent in reproduction ability can be carried out without being influenced by weather, time and surrounding environment, and moreover the characteristic estimation of the whole of the terminal machine including an antenna system can be carried out without using a cable with a space taken as an interface.

2. 发明专利

JPH1138055A ESTIMATING SYSTEM FOR ENVIRONMENTAL CHARACTERISTIC OF ELECTROMAGNETIC FIELD IN WIRELESS TERMINAL MACHINE 失效
公开(公告)号：JPH1138055A
公开(公告)日：1999-02-12
申请号：JP20978297
申请日：1997-07-18
申请人： KOKUSAI ELECTRIC CO LTD , ARAI HIROYUKI
发明人： ONISHI NAOKI , SASAKI KANEMI , ARAI HIROYUKI
IPC分类号： G01R29/08 , G01R31/00 , H04B7/26 , H04B17/00 , H04B17/391 , H04W24/00 , H04W24/06 , H04W88/02 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To realize more accurate estimation by carrying out sufficient characteristic estimation of a wireless terminal machine through an indoor simulation, and preventing an interference between a signal received in the wireless terminal machine and that transmitted from there. SOLUTION: Transmitting antennas 23a-23c are arranged in a sealed box 20 and a wireless terminal machine 22 being estimated object is also installed, and the environmental characteristic in electromagnetic field of a signal which is transmitted from the transmitting antennas 23a-23c and received by the terminal machine 22 is therefore reproduced. The terminal machine 22 is provided with a means for transmitting an information signal about the received signal of the strength of an electric field as a signal except a radio wave namely an optical signal, and an optical sensor 24 for receiving a received information signal transmitted from the terminal machine 22 is provided in the sealed box 20. Thus the received information signal from the terminal machine 22 in the sealed box 20 is inputted into the estimation control means of a personal computer 26 provided outside the sealed box 20 through the optical signal.

3. 发明专利

JPH11266211A ELECTROMAGNETIC FIELD ENVIRONMENT CHARACTERISTIC EVALUATION SYSTEM FOR RADIO TERMINAL EQUIPMENT 失效
公开(公告)号：JPH11266211A
公开(公告)日：1999-09-28
申请号：JP8507998
申请日：1998-03-17
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ONISHI NAOKI , SASAKI KANEMI
IPC分类号： G01R29/10 , G01R31/00 , H04B7/26 , H04B17/00 , H04B17/391 , H04W24/00 , H04W24/06
摘要： PROBLEM TO BE SOLVED: To efficiently move a radio terminal equipment or the like in an electromagnetic environment characteristic evaluation system of the radio terminal equipment for disposing an antenna for transmission inside an electromagnetically shielded shield box, also installing the radio terminal equipment of an evaluation object, transmitting radio signals from the antenna for the transmission and reproducing the electromagnetic field environment characteristics of the signals received by the radio terminal equipment. SOLUTION: For instance, on a ceiling inside the shield box 1, a moving means, constituted of supports 2, 3, 4 and 5, slide units 6a-6c and driving parts 7a and 7b for moving the slide units 6a-6c and moving the radio terminal equipment 11 or the like installed on an attaching base 8 in an optional direction, is provided. Also, at the outside of the shield box 1, a control means 10 for operation-controlling the moving means is provided, and the control means 10, for example, controls the driving parts 7a and 7b through optical fiber cables 9a and 9b.

4. 发明专利

JPH11234091A FREQUENCY VARIABLE FILTER DEVICE 失效
公开(公告)号：JPH11234091A
公开(公告)日：1999-08-27
申请号：JP3073998
申请日：1998-02-13
申请人： KOKUSAI ELECTRIC CO LTD
发明人： KUDO SHINICHI , SASAKI KANEMI , YANO TOSHIMASA , TAKAHASHI YUJI
IPC分类号： H03H7/12 , H03J7/02
摘要： PROBLEM TO BE SOLVED: To provide a frequency variable filter device which is capable of reducing power consumption. SOLUTION: A control part 4 outputs a filter selection signal selecting frequency variable filters 2 (2a, 2b, 2c and 2d) functioning by a frequency expressed through an inputted frequency signal. A bias signal which finely adjusts a tuning frequency to the frequency is generated and outputted to the selected frequency variable filter, and a bias signal by which the power consumption of the pertinent frequency variable filter becomes minimum to the frequency variable filter which is no selected. The selected frequency variable filter 2 finely adjusts the frequency, in accordance with the bias signal and the power consumption of the frequency variable filter 2 which is not selected is set to be minimum in accordance with the bias signal.

5. 发明专利

JPH11122037A ANTENNA FOR PORTABLE RADIO TERMINAL EQUIPMENT 失效
公开(公告)号：JPH11122037A
公开(公告)日：1999-04-30
申请号：JP29499997
申请日：1997-10-14
申请人： KOKUSAI ELECTRIC CO LTD
发明人： SAITO HIROTAKA , SASAKI KANEMI
IPC分类号： H01Q23/00 , H01Q13/08
摘要： PROBLEM TO BE SOLVED: To unite the changeover control signals of a matching circuit for providing equal antenna characteristics in any band, into a single signal when the addition of an allocation frequency band is allocated separately from a band in use at present. SOLUTION: A changeover matching circuit 8 is provided between a power feeding pin 5, connected to the power feeding point (a) of a radiation flat plate 1 and a power feeding cable 3. A power supply voltage Vcc is applied to the serial arm composed of a switching diode CR1 and a parallel capacitor C6 of the changeover matching circuit 8, and a bias control voltage Vcont is supplied to a parallel arm composed of a switching diode CR2 and a serial capacitor C5. When a control voltage is turned off, the CR1 is turned on, when the CR2 is turned off, the power feeding point (a) of this antenna and receiver input are directly connected and matching with a first band is performed. When it is turned on, the CR1 is turned off, the CR2 is turned on, the matching circuit constituted of the C5 and C6 is inserted, and matching with a separated second band is performed.

6. 发明专利

JPH1168449A INCORPORATED ANTENNA FOR RADIO EQUIPMENT 失效
公开(公告)号：JPH1168449A
公开(公告)日：1999-03-09
申请号：JP23046897
申请日：1997-08-13
申请人： KOKUSAI ELECTRIC CO LTD
发明人： ONISHI NAOKI , SASAKI KANEMI
IPC分类号： H01Q19/26 , H01Q1/24 , H01Q1/42 , H01Q13/08 , H04B1/38
摘要： PROBLEM TO BE SOLVED: To realize a high gain by fixing at least one linear non-feeding antenna element of a length not longer than the specific value of the wavelength of the transmission/reception radio wave of a radio equipment in parallel near a radiation conductor board inside of a cover and induce-connecting with the radiation conductor board so as to improve the shortage of the gain of an antenna. SOLUTION: This incorporated antenna for radio equipment is obtained by arranging the linear non-feeding antenna element 5 of a length not longer the 1/2 of the wavelength of the transmission/reception radio wave in the neighborhood of a radiation conductor board 2 of an inverse F-state plane antenna at a prescribed interval. An antenna gain is improved by the inducing connection of the board 2 and the element 5. The element 5 constitutes the incorporated antenna for a radio equipment and functions as an antenna element with the board 2. A horizontal interval δ and a vertical interval α between the board 2 and the element 5 are an important parameter for setting the antenna gain. The antenna has a large gain in all front surface directions (Y-direction) at 0 deg.C to 180 deg.C.

7. 发明专利

JPH10247861A FREQUENCY-BAND SWITCHING COMMON USE DEVICE 失效
公开(公告)号：JPH10247861A
公开(公告)日：1998-09-14
申请号：JP6173397
申请日：1997-03-03
申请人： KOKUSAI ELECTRIC CO LTD
发明人： TANAKA KATSUMI , SASAKI KANEMI
IPC分类号： H01P1/213 , H04B1/44 , H04B7/26
摘要： PROBLEM TO BE SOLVED: To reduce losses by reducing disturbances in impedance matching due to a band changeover of the frequency band switching common use device used for a portable telephone set as an analog and digital system composite terminal. SOLUTION: An inductor L6 and a switch S3 turning on/off the inductor L6 are provided to an impedance matching circuit with a receiver side band-pass filter BPF 2 of a coupler 3 that connects a transmitter side band variable band elimination filter BEF 1, the receiver side band pass filter BPF 2 and a transmission reception common use antenna 4. In the case of using a band A, the switch S3 is open in interlocking with switches S1 , S2 for the transmitter side BEF. In the case of using a band B, the switch S3 is closed to match the respective BPFs.

8. 发明专利

JPH10247839A TUNING FREQUENCY VARIABLE FILTER 失效
公开(公告)号：JPH10247839A
公开(公告)日：1998-09-14
申请号：JP6173297
申请日：1997-03-03
申请人： KOKUSAI ELECTRIC CO LTD
发明人： AIDA TSUTOMU , SASAKI KANEMI
IPC分类号： H03J5/24
摘要： PROBLEM TO BE SOLVED: To speed up switching speed, to set the withstand voltage of a capacitor to be low and to reduce the occurrence of distortion due to the application of the DC voltage of the capacitors by grounding both ends of the additional capacitors in terms of direct current, in spite of the on/off of pin diodes. SOLUTION: One end in respective choke coils L11 -Ln1 in a switch circuit it grounded, and a bias voltage VB is applied directly to the pin diodes D11 -Dn1 . When the tuning frequency of a filter is changed, the bias voltage VB is respectively given to a control voltage applying terminal, and the pin diodes D11 -Dn1 are turned on/off. This way, tuning frequency variable additional capacitors C1 -Cn are turned on/off, an additional capacitor value is changed and the tuning frequency is changed. When n-pieces of application terminals of control voltage VB is combined, the tuning frequency can be changed to 2 types. Thus, Dc charges are not accumulated in the capacitor C1 , and an unnecessary transient characteristic is eliminated.

9. 发明专利

JPH10246742A METHOD AND APPARATUS FOR MEASURING CHARACTERISTICS OF LINEAR ANTENNA 失效
公开(公告)号：JPH10246742A
公开(公告)日：1998-09-14
申请号：JP6173097
申请日：1997-03-03
申请人： KOKUSAI ELECTRIC CO LTD
发明人： SASAKI KANEMI , UTSUNOMIYA OSAMU , TSUCHIYA TOSHIHIRO
IPC分类号： G01R27/26 , G01R29/10 , H01Q9/04
摘要： PROBLEM TO BE SOLVED: To improve a measuring accuracy by discarding various type matching circuits used to measure a half-wavelength linear antenna, thereby reducing a measurement managing expense. SOLUTION: The apparatus for measuring characteristics of a linear antenna comprises a jig 3 for generating a resonance current or resonance voltage at the antenna 4 by a loosely coupling applying means of outputs of sweep type frequency generator 1 by a magnetic field loop or an electric field probe, aiming at current density distribution, voltage density distribution of the half-wavelength linear antenna 4 to output the resonance current or voltage by magnetic field loop or electric field probe loosely coupling extracting means. The method for measuring the characteristics of the antenna comprises the steps of detecting resonance frequency characteristics of the extracted signal by a receiver 2 in synchronization with applied sweep signal, and measuring a length of the antenna and a conductor resistance by resonance frequency of its resonance characteristics and Q.

10. 发明专利

JPH10163916A ANTENNA FOR PORTABLE RADIO TERMINAL EQUIPMENT 失效
公开(公告)号：JPH10163916A
公开(公告)日：1998-06-19
申请号：JP32798796
申请日：1996-11-25
申请人： KOKUSAI ELECTRIC CO LTD
发明人： SAITO HIROTAKA , SASAKI KANEMI
IPC分类号： H01Q23/00 , H01Q13/08 , H04B1/38 , H04B1/3822
摘要： PROBLEM TO BE SOLVED: To perform changeover so as to provide equal antenna characteristics in any bands without changing the structure and size of the antenna of a portable radio terminal equipment even when another frequency band is allocated apart from the band during use at present. SOLUTION: A changeover matching circuit 6 is provided serially between a power feed pin 5 connected to the power feed point (a) of a radiation plate 1 arranged parallelly to a ground plate 2 and a power feed cable 3. The changeover matching circuit 6 is composed of a serial arm composed of a switching diode CR1 and a parallel capacitor C6, a parallel arm composed of the switching diode CR2 and a serial capacitor C5 and the bias control circuit of the respective diodes. The capacitor C6 is short-circuited, the capacitor C5 is opened and a first band is tuned at the time of turning ON the diode CR1 and turning OFF the diode CR2 and the matching circuit composed of the capacitors C5 and C6 is made to act and a second band is tuned when the diode CR1 is OFF and the diode CR2 is ON.

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