초록 ▼

An improved antenna configuration is disclosed for a fully duplex portable radiotelephone that is normally operated in the nearly horizontal position next to the user\s ear and mouth. A notch antenna is provided in the bottom portion of the portable radio transceiver parallel to the major longitudin

An improved antenna configuration is disclosed for a fully duplex portable radiotelephone that is normally operated in the nearly horizontal position next to the user\s ear and mouth. A notch antenna is provided in the bottom portion of the portable radio transceiver parallel to the major longitudinal axis of the housing. The notch aperture is cut in the conductive radio housing at a transverse angle to the major face plane of the radiotelephone to form a notch antenna which radiates predominately vertically polarized E-field waves when the transceiver is positioned such that the major longitudinal axis of the radio is approximately 30 degrees to the horizontal. The notch is an effective quarter-wavelength long and is dual-fed from a pair of coaxial cable transmission lines near the shorted end of the notch.

대표청구항 ▼

A portable radio transceiver comprising: receiver circuitry which receives signals in a first frequency range; transmitter circuitry which transmits signals in a second frequency range; an elongated housing comprised of conductive material and containing said transmitter circuitry and said receiver

A portable radio transceiver comprising: receiver circuitry which receives signals in a first frequency range; transmitter circuitry which transmits signals in a second frequency range; an elongated housing comprised of conductive material and containing said transmitter circuitry and said receiver circuitry therein, said housing having top and bottom portions located at opposite ends of the major longitudinal axis of said housing; and antenna means for radiating vertically polarized E-field waves in a substantially omnidirectional radiation pattern when said transceiver is positioned in free space such that said longitudinal axis is approximately 30 degrees to the horizontal, said antenna means comprising an aperture constructed in said bottom portion of said conductive housing and centered along the major longitudinal axis of said housing.