Retractable radiotelephone antennas with extended feeds
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United States of America Patent
Stats
-
Aug 1, 2000
Grant Date -
N/A
app pub date -
Dec 31, 1997
filing date -
Dec 31, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Radiotelephones having retractable antenna systems include an antenna, a housing with a transceiver and user interface disposed therein and a non-radiating antenna feed coupled to both the antenna and the transceiver. The non-radiating feed is movably mounted within and extendible from the housing so as to have an extended position and a retracted position. In one embodiment, the antenna is physically supported by the non-radiating feed and is thus mounted in an extended state when the non-radiating feed is in an extended position. and is mounted in a retracted state when the non-radiating feed is in the retracted position. Preferably, the antenna exhibits approximately the same electrical length in both the extended and retracted states, and the antenna is substantially isolated from the housing of the radiotelephone when the antenna is in the extended state.
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