Patent ID: 6703978
Filing Date: 2004-03-09
Classification: H01Q

Abstract:
A dual telescopic whip antenna comprising:a radiator including: a conductive wire having a length, a proximal end, and a distal end; a first telescoping tube section having a length and a first diameter, an orifice at a first end to accept the wire proximal end, and an antenna port at a second end attached to a butt having a second diameter greater than the first diameter; a second telescoping tube section having a length, a first diameter, and an orifice at a first end to accept the wire distal end; wherein the radiator has an extended position length that is approximately equal to the sum of the wire length, the first tube length, and the second tube length, and a contracted position with the wire length substantially withdrawn in the first and second tubes; and, the antenna further comprising: a chassis including: a stopper channel assembly with a stopper channel having a third diameter less than the second diameter to accept the first and second tubes in the radiator contracted position and to limit the extension of the first tube from the chassis in the radiator extended position, and a transmission line terminal connected to the first tube antenna port in the radiator extended position; and, a collection channel intersecting the stopper channel at an angle of greater than 5 degrees, to accept the first and second tubes in the contracted position.