| 发明名称 |
System for selecting between a whip antenna and a built-in antenna |
| 摘要 |
An antenna system comprises: a whip antenna and a built-in antenna for diversity reception; an antenna select switch for selecting one of the antennas and connecting the selected one to a radio circuit; and a transmission line length adjusting circuit, inserted between the antenna select switch and the whip antenna, for controlling a terminal load condition of the whip antenna, when the built-in antenna is connected to the radio circuit.
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| 申请公布号 |
US5940040(A) |
申请公布日期 |
1999.08.17 |
| 申请号 |
US19970910740 |
申请日期 |
1997.08.13 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KOYANAGI, YOSHIO;TAKAHASHI, TSUKASA |
| 分类号 |
H01Q1/50;H01Q1/24;H01Q1/52;H01Q3/24;H01Q21/28;H01Q21/29;H04B1/38;H04B7/02;H04B7/06;H04B7/08;H04B7/26;(IPC1-7):H01Q1/24 |
主分类号 |
H01Q1/50 |
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