发明名称 |
Dual-frequency helix antenna |
摘要 |
An antenna (400; 600) for transmitting and receiving radio-frequency signals comprises a cylindrical coil conductor (601) having a turn A and a turn B and between them other turns. The pitch (x1) of turn A is unequal to the pitch (x2) of said turn B, and the pitches of the other turns between turns A and B are in the order of magnitude between the pitches of turns A and B.
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申请公布号 |
US6340954(B1) |
申请公布日期 |
2002.01.22 |
申请号 |
US19990355022 |
申请日期 |
1999.07.26 |
申请人 |
FILTRONIC LK OY |
发明人 |
ANNAMAA PETTERI;KUITTINEN TERO;BORDI MIKA;PUURUNEN PERTTI |
分类号 |
H01Q1/36;H01Q5/00;(IPC1-7):H01Q1/36 |
主分类号 |
H01Q1/36 |
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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