发明名称 |
AM-FM-cellular telephone multiband antenna for motor vehicle |
摘要 |
An AM-FM-cellular telephone multiband antenna adapted for mounting on a motor vehicle fender includes a first mast section having a length of one quarter wavelength at a first frequency near 835 MHz in the cellular telephone band, a phasing coil connected collinearly above the first mast section and having an effective electrical length of three halves wavelength at the first frequency and a second mast section connected collinearly above the phasing coil and having a length of one half the wavelength at the first frequency, whereby the phasing coil and second mast section increase the gain of the total assembly compared to a quarter wavelength antenna for cellular telephone operation at frequencies near the first frequency and further tune the antenna to resonance at a second frequency in the FM radio while providing reception at frequencies in the AM radio band. The antenna is especially suited for power telescoping operation.
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申请公布号 |
US4721965(A) |
申请公布日期 |
1988.01.26 |
申请号 |
US19860821437 |
申请日期 |
1986.01.22 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
ELLIOTT, JAMES O. |
分类号 |
H01Q1/10;H01Q5/02;(IPC1-7):H01Q1/10 |
主分类号 |
H01Q1/10 |
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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