Antenna device for high-frequency radio apparatus,...

H - Electricity – 01 – Q

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Details

H01Q 1/24 (2006.01) G04B 47/00 (2006.01) H01Q 1/27 (2006.01) H01Q 1/48 (2006.01) H01Q 9/04 (2006.01) H01Q 13/08 (2006.01) H04B 1/38 (2006.01)

Patent

CA 2352247

An antenna device for a high-frequency radio apparatus that enables the apparatus to be made compact and improves its sensitivity. The antenna has an L-shaped antenna element; the shorter part of which extends perpendicular from ai circuit substrate which has a ground pattern formed thereon. The area of the orthogonal projection of the longer part of the L-shaped antenna element, which is spaced apart from the circuit substrate and substantially parallel to its surface which has the ground pattern formed thereon, is smaller than the area of the ground pattern. The antenna also has a feeding line which is substantially parallel to the shorter part of the L-shaped antenna element. A dielectric member, which also functions to secure various component, is placed close to the antenna element so as to set the resonance frequency of the antenna device.

Cette invention a trait à un appareil de radio pourvu d'une antenne haute fréquence, lequel appareil est de dimensions réduites, dont la sensibilité est améliorée et ne connaissant pas de défaillances due à l'électricité statique. Une plaque de masse plus grande que l'aire de projection à la surface du substrat est constituée sur une carte à circuit imprimé et un élément d'antenne est positionné en trois dimensions perpendiculairement à cette configuration de mise à la masse. Un câblage d'élément diélectrique, une trame de fixation de panneau, se trouve au voisinage de l'élément d'antenne afin de maintenir une position d'antenne et de raccourcir une longueur d'onde. Le corps de l'utilisateur est connecté à un potentiel à la masse. Une extrémité de l'élément plié en forme de L est connectée à la plaque de masse sur le circuit imprimé et un coaxial est positionné verticalement en parallèle à l'élément. La partie inférieure de l'élément constitue la plaque de masse. L'antenne se trouve sur la face supérieure d'un boîtier de montre et le coaxial est positionné, tridimensionnellement, dans le boîtier.

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