Transceiver having retractable antenna assembly

A retractable antenna for use with a radio circuit operating at a desired frequency, comprising:

• a conductive tube having a first end and a second end;
• a first electrical contact located at said first end of said conductive tube;
• a second electrical contact located at said second end of said conductive tube;
• a first antenna element having a junction at a first end and an electrical contact at a second end, said first antenna element being at least partially disposed within said conductive tube when said first antenna element is in a retracted position, said electrical contact of said first antenna element being in contact with said first electrical contact when said first antenna element is in said retracted position, and said electrical contact of said first antenna element being in contact with said second electrical contact when said first antenna element is in an extended position;
• a second antenna element being connected to said junction at said first end of said first antenna element, said second antenna element being substantially outside of said conductive tube;
• a conductor for connecting said first electrical contact to said second electrical contact, said conductor having an electrical length approximately equal to an odd multiple of a quarter wavelength at said desired frequency, and wherein said antenna further comprises grounding means for grounding said first electrical contact to said conductive tube when said first antenna is in said extended position;
• and
• means for connecting said first electrical contact and said conductor to said radio circuit.

A portable radio transceiver, comprising:

• a radio transceiver circuit operating at a desired frequency;
• a conductive tube having a first end and a second end;
• a first electrical contact located at said first end of said conductive tube and electrically isolated from said conductive tube;
• a second electrical contact located at said second end of said conductive tube and electrically isolated from said conductive tube;
• a first antenna element having a junction at a first end and an electrical contact at a second end, said first antenna element being at least partially disposed within said conductive tube when said first antenna element is in a retracted position, said electrical contact of said first antenna element being in contact with said first electrical contact when said first antenna element is in said retracted position, and said electrical contact of said first antenna element being in contact with said second electrical contact when said first antenna element is in an extended position;
• a second antenna element being connected to said junction at said first end of said first antenna element, said second antenna element being substantially outside of said conductive tube;
• a conductor for connecting said first electrical contact to said second electrical contact, said conductor having an electrical length equivalent to a multiple of a quarter wavelength at said desired frequency, said conductor being external to said conductive tube;
• and
• means for connecting said first electrical contact and said conductor to said radio transceiver circuit.

A portable radio transceiver, comprising:

• a radio transceiver circuit operating at a desired frequency;
• a conductive tube having a first end and a second end;
• a first electrical contact located at said first end of said conductive tube;
• a second electrical contact located at said second end of said conductive tube;
• a first antenna element having a junction at a first end and an electrical contact at a second end, said first antenna element being at least partially disposed within said conductive tube when said first antenna element is in a retracted position, said electrical contact of said first antenna element being in contact with said first electrical contact when said first antenna element is in said retracted position, and said electrical contact of said first antenna element being in contact with said second electrical contact when said first antenna element is in an extended position;
• a second antenna element being connected to said junction at said first end of said first antenna element, said second antenna element being substantially outside of said conductive tube;
• a conductor for connecting said first electrical contact to said second electrical contact, said conductor having an electrical length approximately equal to an odd integer multiple of a quarter wavelength at said desired frequency, and wherein said antenna further comprises grounding means for grounding said first electrical contact to said conductive tube when said first antenna is in said extended position;
• and
• means for connecting said first electrical contact and said conductor to said radio transceiver circuit.