Abstract: A loop directive antenna having improved front-to-back ratio and gain for given input power levels assembly for a hand-held radio frequency transceiver, such as a cellular telephone or PCS device operating in the 800-900 or 1850-1990 MHz. frequency ranges, respectively, is provided by the present invention. The loop directive antenna assembly consists of a main loop antenna conductor disposed upon a dielectric element. The main loop antenna conductor and dielectric element are maintained a predetermined distance away from a ground plane, which may be the circuit board or other conductive element. The main loop antenna conductor may include a variety of feedpoint orientations to provide alternative polarizations of the transmitted signal. The ground plane may be a portion of the printed circuit board of the device, a conductive part of the device housing, the battery pack of the device, or a separate conductive panel.

Abstract: An antenna assembly for transmitting a radio signal from a radio signal transmitting device includes an antenna unit comprised of a dipole driven antenna member for transmitting a radio signal from the radio signal transmitting device. A radiation reflector reflects the radio signal transmitted by the driven antenna member, and a support member supports the driven antenna member and the radiation reflector so that a predetermined gap is precisely maintained between the driven antenna member and the radiation reflector. A shielding member shields a portion of the radio signal transmitted by the driven antenna member in a direction toward the shielding member. The antenna unit is pivotally mounted so that it is disposable at selectable positions relative to the shielding member. The output of the radio signal transmitted by the driven antenna member can be controlled depending on a position of the antenna unit. The dipole driven antenna member comprises a first and a second segment made from a metal foil.

Abstract: A dual band antenna assembly is described to include a pair of dual band active radiating elements disposed upon a dielectric substrate. A pair of LC traps and conductor elements are electrically coupled to the radiating conductor elements to provide dual band resonance for cellular telephone and PCS device bandwidth ranges. Additional performance may be achieved with parasitic reflector and director elements. The multi-element directional antenna finds particular applicability for in-vehicle and wireless communication use.

Abstract: A planar, compact, multiple-element directive antenna for a hand-held radio frequency transceiver, such as a cellular telephone or PCS device, is provided which has an active radiating conductor element, a dielectric spacing member, and a conductive ground plane. The operative conductive round plane may be provided solely by an existing one internal with the hand-held transceiver, such as a printed wiring board, a metal chassis, or a metallized plastic surface, or by a parallel small ground plane coupled capacitively or directly to the larger transceiver ground plane. The multiple-element directive antenna allows increased range, improved voice/data quality, increased battery life, reduced user exposure to radio frequency radiation, elimination of user antenna adjustments, and reduction of antenna susceptibility to damage.