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1. 发明专利

JPH0425205A WRIST WATCH TYPE PORTABLE RADIO EQUIPMENT 失效
公开(公告)号：JPH0425205A
公开(公告)日：1992-01-29
申请号：JP12901890
申请日：1990-05-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： CHO KEIZO , TSUNEKAWA KOICHI , KAGOSHIMA KENICHI , ITAKURA HITOTSUGU , OHATA KOHEI , AOKI TAKAAKI
IPC分类号： H01Q1/44 , H01Q1/22 , H04B1/38 , H04B1/3822 , H04B7/26 , H04W88/02
摘要： PURPOSE:To improve the antenna gain by pressing a bottom of a radio wave equipment case onto a human body with a spring or an elastic member. CONSTITUTION:Normally a case bottom 6 is exposed from a case 2 by a coil spring 8, and when the radio equipment is mounted onto a human body 1, the case bottom 6 is pushed up by the human body 1 and surely in contact with the human body 1a with a repulsive force of the coil spring 8. That is, when the radio equipment is mounted to a wrist, the antenna provided to the case bottom 6 is surely in contact with the human body 1. Thus, the gain of the receiver is made stable and the communication quality is improved.

2. 发明专利

JPH03247021A PORTABLE RADIO EQUIPMENT 失效
公开(公告)号：JPH03247021A
公开(公告)日：1991-11-05
申请号：JP4249690
申请日：1990-02-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： CHO KEIZO , KAGOSHIMA KENICHI , TSUNEKAWA KOICHI , ITAKURA HITOTSUGU , AOKI TAKAAKI , MURATA YOSHITOSHI
IPC分类号： H01Q1/44 , H04B1/38
摘要： PURPOSE:To obtain high sensitivity both in open space and a state carried by a human body by integrating an antenna effective when carried by a human body and an antenna having an excellent characteristic in open space into one radio equipment. CONSTITUTION:A helical antenna 1 is fitted so as to be wound onto a belt 5 at both sides of a radio equipment 4 and one terminal of the helical antenna 1 is connected to a feeder. Moreover, a conductor (loop antenna element) 2 of a straight line shape is fitted to the belt 5 and both ends not connected to a feeding point 3 of the lead 2 are connected to the human body to an arm, for example. When a portable radio equipment 4 used while carried by and connected to the human body to an arm, for example, is removed from the arm (human body), a helical or zigzag antenna 1 works and a high gain is realized. When the equipment is connected to the human body, to the arm, for example, the resonance frequency of the helical or zigzag antenna 1 is transited, a loop antenna 2 works and remarkable deterioration in the gain is not caused. Thus, high sensitivity is obtained both in the state connected to the human body and in the state removed from the human body.

3. 发明专利

JPH03162014A WRISTLET TYPE RADIO EQUIPMENT 失效
公开(公告)号：JPH03162014A
公开(公告)日：1991-07-12
申请号：JP30146489
申请日：1989-11-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TSUNEKAWA KOICHI , KAGOSHIMA KENICHI , AOKI TAKAAKI , MURATA YOSHITOSHI
IPC分类号： H04B1/08 , H01Q1/22 , H01Q1/24 , H01Q1/44
摘要： PURPOSE:To obtain a high gain at setting or unsetting on human body by forming a metallic wire sufficiently thin in comparison with the operation wavelength into a helical coil in the antenna element of a radio equipment and arranging a loop face of the helical coil to a wrist setting band with respect to a lengthwise direction orthogonally. CONSTITUTION:The radio equipment consists of a wrist setting band 2 and a radio equipment 3 set to the wrist setting band 2. Then the antenna element 1 of the radio equipment 3 is formed by winding a metallic wire sufficiently thin in comparison with the operating wavelength as a helical coil and the loop face of the helical coil is arranged orthogonally to the wrist setting band 2 in the lengthwise direction. Thus, self-resonance is attained in a free space and a high gain is obtained without needing a matching circuit and the antenna is formed at a loop face perpendicular to a human body, then the characteristic change in the performance is less at the setting on the human body and high gain is obtained.

4. 发明专利

JPH03265304A PORTABLE RADIO EQUIPMENT 失效
公开(公告)号：JPH03265304A
公开(公告)日：1991-11-26
申请号：JP6259790
申请日：1990-03-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TSUNEKAWA KOICHI , CHO KEIZO , KAGOSHIMA KENICHI , ITAKURA HITOTSUGU , AOKI TAKAAKI , MURATA YOSHITOSHI
IPC分类号： H01Q1/44 , H04B7/26
摘要： PURPOSE:To realize a wrist-mount portable radio equipment with a high gain at mount to a human body by placing two or over of conductive members whose lengthwise length is 1/4 of the operating wavelength or below and whose width is nearly equal to the width of a write mount band onto the wrist mount band face so as not to be overlapped with each other. CONSTITUTION:A wrist mount portable radio equipment consists of conductor members 1, 1', a wrist mount band 2, a radio equipment 3 and a radio circuit section 4. Moreover, a noninverting terminal and an inverting terminal of the radio circuit section 4 are connected to the conductor members 1, 1'. It is important for the conductive members 1, 1' to have a wide area, the width is widened to utmost, the length is selected sufficiently shorter than the operating wavelength and the length of the conductor members 1, 1' is selected to be less than 1/4 of the operating wavelength by taking the surrounding length of a wrist of an ordinary person into account. Thus, the antenna gain is improved and the portable radio equipment with high sensitivity is realized.

5. 发明专利

JPH03147406A SMALL SIZED ANTENNA 失效
公开(公告)号：JPH03147406A
公开(公告)日：1991-06-24
申请号：JP28479389
申请日：1989-11-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AOKI TAKAAKI , MURATA YOSHITOSHI , TSUNEKAWA KOICHI , KAGOSHIMA KENICHI
IPC分类号： H01Q7/00
摘要： PURPOSE:To realize a small sized antenna with self-resonance and excellent gain directivity performance by forming a coil whose size is sufficiently smaller than the wavelength as a loop and unfolding a conductor plate to the inside of the coil with an insulation film inbetween. CONSTITUTION:A coil 1 having a pitch (p), a width (w) and a height (h) sufficiently smaller than the wavelength is formed as a loop, feeding points 4, 4' are provided to both ends of the coil 1 and a conductor plate 3 is adhered to the inside of the loop with an insulation film 2 inbetween. Through the constitution above, as shown in figure, the coil 1 (width w=20mm, height h=2mm, pitch p=3mm, diameter d=nearly 5cm and total length = nearly 15cm) is in selfresonance near 280MHz and acts like an antenna whose band width is 5-6 MHz. Even when the dielectric substance is inserted in the loop, the change in the resonance frequency is not almost caused. Thus, even when the antenna is in use while being wound on an arm of a human body or the like, no gain decrease is caused and the excellent efficiency and directivity characteristic performance is attained.

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