Selectively coupled two-piece antenna

H - Electricity – 01 – Q

Patent

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Details

H01Q 1/24 (2006.01) H01Q 5/02 (2006.01)

Patent

CA 2458571

A selectively coupled two-piece antenna for use in a mobile phone having a casing (102) and radio frequency (RF) communications circuitry (112) includes a composite radiator (206) that is selectively extendable from and retractable into the casing and a communications interface that is connected to the RF communications circuitry. The composite radiator has first and second radiating elements (208, 212), and a connecting element (210). When the composite radiator is extended, the connecting element connects the first and second radiating elements. In this position, the communications interface connects the RF communications circuitry to the first and second radiating elements. Thus, the RF communications circuitry transmits and/or receives RF signals through both the first and second radiating elements as a top loaded antenna. However, when the composite radiator is retracted, the connecting element electrically isolates the first and second radiating elements. In this position, the composite radiator electrically connects with the communications interface so that the first radiating element is electrically connected to the RF communications circuitry.

L'invention concerne une antenne en deux éléments couplés de manière sélective s'utilisant dans un téléphone mobile qui comprend un logement (102) et un ensemble de circuits de communications (112) à radio fréquence (RF) constituée d'un élément rayonnant composite (206) pouvant être déployé de manière sélective à partir du logement et rétracté dans celui-ci, et une interface de communications reliée à l'ensemble de circuits de communications RF. L'élément rayonnant composite comprend des premier et second éléments rayonnants (208, 212), et un élément de connexion (210). Lorsque l'élément rayonnant est déployé, l'élément de connexion connecte entre eux les premier et second éléments rayonnants. Dans cette position, l'interface de communications connecte l'ensemble de circuits de communications RF aux premier et second éléments rayonnants. Ainsi, l'ensemble de circuits de communications RF transmet et/ou reçoit des signaux RF par le biais des premier et second éléments rayonnants comme une antenne à capacité terminale. Cependant, lorsque l'élément rayonnant composite est rétracté, l'élément de connexion isole électriquement les premier et second éléments rayonnants. Dans cette position, l'élément rayonnant composite se connecte électriquement à l'interface de communications de manière que le premier élément rayonnant soit électriquement connecté à l'ensemble de circuits de communications RF.

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