Antenna for portable radio devices
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United States of America Patent
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-
Sep 16, 1997
Grant Date -
N/A
app pub date -
Oct 13, 1994
filing date -
Oct 14, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention concerns an antenna for portable radio devices including a helical antenna coupled at the base to a transmitter/receiver. The pitch of a conductive material helix constituting the helical antenna varies according to the height of the helix. It decreases from the base of the helical antenna towards its top.
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