Adjustable antenna assembly for a portable telephone

Details Adjustable antenna assembly for a portable telephone Adjustable antenna assembly for a portable telephone

1993-10-25

1995-07-25

Hajec, Donald

Communications: radio wave antennas

Antennas

Single adjustable length electrically long linear antenna

343702, 343895, H01Q 136

Patent

active

054366330

ABSTRACT:
An adjustable antenna assembly for a portable telephone includes a tubular base removably attached to a portable telephone, a socket securely received in the tubular base and having an outer periphery which is threaded in an upper end thereof, a coil received in the socket with a lower end thereof electrically connected to the telephone for receiving and transmitting wireless signal waves to the telephone, a cap having a closed upper end and an open lower end, the cap further having a threaded inner periphery and being mounted around the threaded upper end of the socket and thus being movable relative to the socket along a longitudinal direction of the coil upon rotational movement thereof, and a compressing member mounted between an upper end of the coil and the upper end of the cap such that a pitch of the coil is adjustable upon adjustment of relative longitudinal position between the cap and the socket.

REFERENCES:
patent: 2214685 (1940-09-01), Stone
patent: 5214434 (1993-05-01), Hsu
patent: 5218372 (1993-06-01), Cheng
patent: 5274393 (1993-12-01), Scott

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