Antenna assembly for radio circuit and method therefor

Details Antenna assembly for radio circuit and method therefor Antenna assembly for radio circuit and method therefor

H - Electricity

01

Q

H01Q 1/27 (2006.01) H01Q 1/24 (2006.01) H01Q 1/36 (2006.01)

Patent

CA 2117561

A nondirectional antenna assembly, and associated method, for a radio operative at high frequencies, such as at frequencies of approximately 1.8 Gigahertz. A first antenna portion, formed of a one-half wavelength, helical winding is supported at a distal side of a nonconductive whip. A second antenna portion, comprised of a helical winding supported at a proximal side of the nonconductive whip, and a one-quarter wave helical winding, connected to radio circuitry of the radio transceiver, couples the first antenna portion to the radio circuitry. Because the first antenna portion is positioned at a distal side of the nonconductive whip, shadowing occurring as a result of positioning the radio transceiver proximate to a user during operation thereof is less likely to interfere with operation of the radio transceiver.

L'invention est constituée par une antenne radio haute fréquence non directive et par une méthode connexe, la fréquence de travail de cette antenne étant d'environ 1,8 gigahertz. L'antenne de l'invention comporte un premier élément à enroulement hélicoïdal d'un quart de longueur d'onde supporté à l'extrémité proximale d'un fouet non conducteur et connecté aux circuits radio de l'émetteur-récepteur radio et couple le premier élément à ces circuits radio. Le premier élément de l'antenne étant monté à l'extrémité distale du fouet non conducteur, l'occultation résultant du positionnement de l'émetteur-récepteur radio à proximité de l'utilisateur devrait être moins nuisible au bon fonctionnement de l'émetteur-récepteur.

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