Dielectric filter construction

H - Electricity – 01 – P

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H01P 1/20 (2006.01) H01P 1/205 (2006.01) H01P 11/00 (2006.01)

Patent

CA 2104003

A dielectric filter (50) construction having at least two resonating cavities (88, 92) extending longitudinally through a block of dielectric material. At least one of the resonating cavities is of a cross-sectional area which is elongated in a transverse direction, and at least one notch (106, 112) is formed to extend longitudinally along at least one of the surfaces of the block of dielectric material between adjacent ones of the resonating cavities. By appropriate selection of the amount of elongation of the cross-section of the resonating cavity, and the location and dimension of the notch formed along the surface of the block, the component values of the component elements comprising the filter may be selected over an increased range without altering the physical size of the filter.

Construction de filtre diélectrique (50) ayant au moins deux cavités de résonance (88, 92) se prolongeant longitudinalement par un bloc de matériau diélectrique. Au moins l'une des cavités de résonance a une section prolongée dans une direction transversale, et au moins un créneau (106, 112) est formé pour la prolongation longitudinale sur au moins une surface du bloc de matériau diélectrique entre les parties adjacentes des cavités à résonance. En sélectionnant de façon appropriée la somme d'élongation de la section de la cavité de résonance, de l'emplacement et de la dimension du créneau formé à la surface du bloc, les valeurs des composantes du filtre peuvent être sélectionnées parmi une plage étendue sans modifier la taille physique du filtre.

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