Patent ID: 8018396

Claim:
A dual-resonance retractable antenna, comprising: a telescopic radiating device made of an electrically conducting material, said telescopic radiating device comprising a tubular outer radiating element and at least one inner radiating element slidably inserted into an interior of said tubular outer radiating element and being movable in and out between an extended position and a retracted position; a radiating tube made of a metal conductive material, said tubular outer radiating element of said telescopic radiating device being located in an interior of said radiating tube; a connector made of an electrically conducting material, said connector comprising a cylindrical body and a front extension rod axially forwardly extending from a front end of said cylindrical body, an outer diameter of said cylindrical body is larger than an outer diameter of said front extension rod; said cylindrical body being press-fitted into an interior of a bottom end of said radiating tube and said front extension rod being press-fitted into an interior of a bottom end of said tubular outer radiating element of said telescopic radiating device; and an insulative tube fixedly connected to a top end of said radiating tube, a top portion of said tubular outer radiating element of said telescopic radiating device being located in an interior of said insulative tube, said insulative tube fixing said tubular outer radiating element of said telescopic radiating device in place, said at least one inner radiating element being movable in and out of said tubular outer radiating element and said insulative tube between said extended position and said retracted position, said insulative tube electrically isolating said radiating tube from said telescopic radiating device; wherein said at least one inner radiating element is slidable in and out of said tubular outer radiating element to adjust the length of the dual-resonance retractable antenna, enabling the dual-resonance retractable antenna to oscillate at two different resonance frequencies.