发明名称 |
Surface mount antenna and communication device including the same |
摘要 |
In a feeding radiation electrode of a surface mount antenna, a series inductance component such as a meander pattern is formed locally in a maximum resonance current part in a high-order mode (second-order mode) so as to locally form a series inductance component therein thereby making the maximum resonance current part have a greater electrical length per unit physical length than the other parts. This makes it possible to control the difference between the resonance frequency in a fundamental mode and the resonance frequency in the high-order mode over a large range. Furthermore, it is possible to vary the resonance frequency in the second-order mode independently of the resonance frequency in the fundamental mode by varying the number of lines or the line-to-line distance of the meander pattern thereby varying the value of the series inductance component. Thus, it is possible to easily and efficiently design a surface mount antenna having a frequency characteristic which satisfies requirements needed in multi-band applications without having to change the basic design.
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申请公布号 |
US6452548(B2) |
申请公布日期 |
2002.09.17 |
申请号 |
US20010776600 |
申请日期 |
2001.02.02 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
NAGUMO SHOJI;KAWAHATA KAZUNARI;TSUBAKI NOBUHITO;ISHIHARA TAKASHI;ONAKA KENGO |
分类号 |
H01Q21/30;H01Q1/24;H01Q1/38;H01Q5/00;H01Q5/01;H01Q9/04;H01Q13/08;(IPC1-7):H01Q1/38 |
主分类号 |
H01Q21/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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