发明名称 |
Apparatus for multi-position antenna |
摘要 |
A multi-position antenna apparatus is provided for a device including a first housing portion and a second housing portion which are interconnected such that they move relative to one another between a collapsed position and an extended position. The device includes radio circuitry positioned in the first housing portion. The antenna apparatus includes a first antenna supported in the second housing portion. The first antenna is coupled to the radio circuitry in the extended position and in the collapsed position. A parasitic radiator is supported in the first housing portion and is only coupled to the first antenna when the housing is in the collapsed position. The parasitic radiator is a quarter wavelength of the signaling frequency or an integer multiple thereof. The parasitic radiator may include a member inductively or capacitively coupled to the first antenna when the flap is closed. Alternatively, the parasitic radiator may be a patch radiator or a loop conductor. An end of the parasitic radiator may be connected to ground.
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申请公布号 |
US5572223(A) |
申请公布日期 |
1996.11.05 |
申请号 |
US19940307224 |
申请日期 |
1994.09.16 |
申请人 |
MOTOROLA, INC. |
发明人 |
PHILLIPS, JAMES P.;VANNATTA, LOUIS J.;KRENZ, ERIC L. R. |
分类号 |
H01Q1/24;H04B1/38;(IPC1-7):H01Q1/24 |
主分类号 |
H01Q1/24 |
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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