Antenna device and mobile telephone

H - Electricity – 01 – Q

Patent

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Details

H01Q 1/38 (2006.01) H01Q 1/12 (2006.01) H01Q 7/00 (2006.01)

Patent

CA 2189239

An antenna comprises a closed loop (1) spaced above a ground plane (2). Two connec- tion points (10, 11) spaced around the loop (1) are provided for coupling to a transmission line (5). The loop (1) may have one or more extra conductive portions (11, 15, 16, 19) joined to it to alter its characteristics. The antenna is par- ticularly suitable for use in mobile telephones at frequencies of the order of 800 MHz - 900 MHz, in which application the antenna may be mounted to provide directional transmission of power away from the user. The loop may be formed on a printed circuit board.

Une antenne comprend une boucle fermée (1) disposée au-dessus d'un plan de sol (2). Deux points de connexion (10, 11) disposés séparément sur cette boucle (1) permettent le couplage à une ligne de transmission (5). Cette boucle (1) peut composer une ou plusieurs parties conductrices supplémentaires (11, 15, 16, 19) qui lui sont raccordées pour en modifier les caractéristiques. Cette antenne s'adapte particulièrement à une utilisation avec des téléphones mobiles, à des fréquences de l'ordre de 800-900 MHz, utilisation pour laquelle elle peut être montée pour donner une émission de puissance directionnelle depuis l'utilisateur. Cette boucle peut être disposée sur une plaquette de circuit imprimé.

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