发明授权
- 专利标题： Antenna assembly and portable radio apparatus
- 专利标题（中）： 天线组件和便携式无线电设备
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申请号： US807274申请日： 1997-02-28
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公开(公告)号： US5952974A公开(公告)日： 1999-09-14
- 发明人: Hiroki Ito , Katsumi Hirota , Shinichi Kuroda
- 申请人： Hiroki Ito , Katsumi Hirota , 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： JPX8-075222 19960305
- 主分类号： H01Q1/10
- IPC分类号： H01Q1/10 ; H01Q1/24 ; H01Q1/30 ; H01Q1/36 ; H01Q9/32 ; H01Q11/08 ; H04Q7/32
摘要：
A mono-pole antenna is composed of a first element and a second element. An insulator spacer is disposed between the first element and the second element so as to capacitively couple them. In the state that the antenna is retracted, the helical antenna operates. In the state that the antenna is extended, the mono-pole antenna composed of the first element and the second element operates. Since the mono-pole antenna is composed of the first element and the second element that are capacitively coupled, even if the electrical length of the helical antenna is different from the electrical length of the mono-pole antenna, the impedances can be properly matched with a common matching circuit.
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