发明授权
US5918162A Antenna unit and portable radio terminal with a feeding circuit and
spiral antenna
失效
天线单元和带有馈电电路和螺旋天线的便携式无线电终端
- 专利标题： Antenna unit and portable radio terminal with a feeding circuit and spiral antenna
- 专利标题（中）： 天线单元和带有馈电电路和螺旋天线的便携式无线电终端
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申请号： US833122申请日： 1997-04-04
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公开(公告)号： US5918162A公开(公告)日： 1999-06-29
- 发明人: Hiroki Ito , Nobuo Sato , Yoshiki Kanayama , Shinichi Kuroda
- 申请人： Hiroki Ito , Nobuo Sato , Yoshiki Kanayama , Shinichi Kuroda
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-111993 19960409
- 主分类号： H01Q1/24
- IPC分类号： H01Q1/24 ; H04B1/38 ; H04Q7/38
摘要：
An antenna unit in which fine antenna characteristic can be obtained when the antenna is contained/pulled out. When the second antenna (9) is contained, the second antenna is electrically disconnected from the feeding circuits (5, 7) by the antenna cover (13), so that only the first antenna (8) operates as antenna. On the other hand, when the second antenna is pulled out, the first antenna is compressed by the antenna stopper element (21) and the electrical length is varied, so that only the second antenna operates as antenna. As a result, fine antenna characteristic can be obtained when the antenna is contained/pulled out.
公开/授权文献
- US5366631A Composite, supported fluorocarbon media 公开/授权日：1994-11-22
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