Antenna arrangements

Details Antenna arrangements Antenna arrangements

H - Electricity

01

Q

H01Q 15/00 (2006.01) H01Q 19/06 (2006.01)

Patent

CA 2322515

The performance of a microwave antenna is improved by incorporating a fine wire dielectric material (16) which has a dielectric constant .epsilon. of less than unity at microwave frequencies. The effect of the dielectric material (16) is to refract microwaves (20) so that the antenna (14) appears to have a larger aperture than that of its physical size. Furthermore, by selecting the transmission cut off frequency of the dielectric material, two antenna elements which are intended to operate within different frequency bands can be mounted one behind the other.

Une amélioration a été apportée à une antenne hyperfréquence par incorporation d'un matériau (16) diélectrique filaire fin ayant une constante diélectrique .epsilon. inférieure à une unité au niveau des hyperfréquences. L'effet du matériau (16) diélectrique est de réfracter les hyperfréquences (20) de sorte que l'antenne (14) semble avoir une plus grande ouverture que celle de sa taille physique. De plus, en sélectionnant la fréquence de coupure de transmission du matériau diélectrique, deux éléments d'antenne prévus pour fonctionner dans différentes bandes de fréquence peuvent être montés l'un derrière l'autre.

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