Adapter antenna
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United States of America Patent
Stats
-
Mar 25, 2003
Grant Date -
May 30, 2002
app pub date -
Jul 9, 2001
filing date -
Jul 7, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An adapter antenna (2) is used for contactless connection of a mobile telephone (1) to an external antenna (4) in case the telephone lacks a connector for coaxial cable (3) for such a purpose. The most common application is when a mobile telephone is to be used in a vehicle. Transfer of radio waves occurs in the near field of the built-in antenna (6) of the telephone by capacitive coupling. One preferred embodiment especially suited for plane inverted antennae of type L, E or F is described. An optimizing method for two frequency bands is described.
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