초록

A dual mode antenna for a miniature radio transceiver includes a low profile loop antenna structure while mounted on a body and a high efficiency dipole antenna while held in the hand.

대표청구항 ▼

A dual mode antenna for a miniature radio transceiver comprising: a U-shaped conductive antenna adapted to fit over a casing of the radio transceiver, wherein the U-shaped antenna is made of two separate segments spaced apart but disposed on the casing so that when the two are connected electrically

A dual mode antenna for a miniature radio transceiver comprising: a U-shaped conductive antenna adapted to fit over a casing of the radio transceiver, wherein the U-shaped antenna is made of two separate segments spaced apart but disposed on the casing so that when the two are connected electrically they form the U-shaped antenna; an impedance matching circuit coupled across the open end of the U-shaped antenna; a dipole antenna element; means for coupling the dipole antenna element in an extended position to de-couple one segment of the U-shaped antenna and couple the dipole antenna element and the other segment of the U-shaped antenna to the radio transceiver to provide a dipole antenna for the transceiver and coupling the dipole in a coupled position over the transceiver to complete electrical path between the two segments of the U-shaped antenna to form the U-shaped antenna to the transceiver and de-couple the dipole antenna from the transceiver to provide a loop antenna to the transceiver.