An antenna having controllable direction of radiation

Details An antenna having controllable direction of radiation An antenna having controllable direction of radiation

H - Electricity

01

Q

H01Q 3/44 (2006.01) H01Q 1/38 (2006.01) H01Q 3/24 (2006.01) H01Q 9/27 (2006.01) H01Q 9/40 (2006.01)

Patent

CA 2551559

An antenna (10) suitable for a mobile telephone or other such communication device has a transmission element (21) to transmit and receive an electromagnetic radiation pattern. The transmission element (21) is supported on a layer or layers (25) of dielectric material, control over the orientation of a radiation pattern to be transmitted or received being maintained electronically. The transmission element (21) includes at least one loop and is often in a spiral configuration. Switches (23, 24) in the form of a microelectromechanical switch or a PIN diode, capable of short or open circuiting the element (21), allow the orientation of the radiation pattern to be altered. The dielectric constant of the dielectric material (25) is variable, again affecting the orientation.

L'invention concerne une antenne (10) convenant pour un téléphone mobile ou un autre dispositif de télécommunication et qui comporte un élément de transmission (21) pour émettre et recevoir un motif de rayonnement électromagnétique. L'élément de transmission (21) est maintenu sur une ou plusieurs couches (25) de matière diélectrique, le réglage de l'orientation du motif de rayonnement à émettre ou à recevoir étant assuré par des moyens électroniques. L'élément de transmission (21) comprend au moins une boucle et présente souvent une structure en spirale. Des commutateurs (23, 24) sous la forme d'un commutateur microélectromécanique ou d'une diode PIN, pouvant court-circuiter ou ouvrir l'élément (21), permettent de modifier l'orientation du motif de rayonnement. La constante diélectrique de la matière diélectrique (25), qui est variable, agit également sur l'orientation.

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