QUARTER WAVE-QUARTER WAVE RETRACTABLE ANTENNAS AND ASSOCIATED TELEPHONES

摘要

A quarter wave-quarter wave retractable antenna (20) having a quarter wave helix (25) and configured to linearly extend and retract about a central axis (100), the antenna having an operable extended position and an associated extended signal path, said antenna comprising: a cylindrical antenna rod (30) longitudinally positioned along the length of said antenna such that it is spaced apart a distance from said helix, said antenna rod having a linearly extending conductive core (30a) and an outer surface (30b) and including opposing first and second ends defining the central axis through the center thereof; and a conductive cylindrical component (40) having opposing top and bottom portions, said bottom portion including a cylindrical opening formed therein, said top end is connected to said helix and said bottom cylindrical opening is configured to receive a portion of said first end of said antenna rod therein; wherein said cylindrical component is configured to surround a portion of said first end of said antenna rod, and wherein said antenna rod first end (31) is held in spaced apart substantial concentric alignment within said cylindrical component to define a capacitive coupling (55) therebetween; and wherein, in operation, when said retractable antenna is in the extended position, said helix, said capacitive coupling, and said antenna rod are in electrical communication and included in said extended signal path together define about a quarter wave length impedance. 1029 כ" ד בסיון התשס" ג - June 24, 2003