Dielectric resonator, dielectric filter, duplexer, and...

H - Electricity – 01 – P

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H01P 7/10 (2006.01) H01P 1/208 (2006.01)

Patent

CA 2238126

The invention provides a dielectric resonator for example in the TE010 mode characterized in that electrodes are formed on both principal surfaces of a dielectric plate in such a manner that influence of spurious waves propagating in a space between the electrodes and a conductive plate is prevented thus preventing the reduction in Qo and degradation in the attenuation characteristic in the frequency ranges outside the passband. The inner diameter of the cavity is selected such that when the cavity is regarded as a waveguide the cutoff frequency of the waveguide becomes higher than the resonant frequency of a resonance region and such that the inner diameter of the cavity is greater than a non-electrode part.

Cette invention concerne un résonateur diélectrique fonctionnant, par exemple, en mode TE010 dans lequel des électrodes sont formées sur les deux faces principales d'une plaque diélectrique, de manière à rendre sans effet les éventuelles ondes parasites se propageant entre les électrodes et une plaque conductrice et d'éviter ainsi toute réduction de Qo et dégradation des caractéristiques d'atténuation aux fréquences se situant en dehors de la bande passante. Le diamètre interne de la cavité est tel que si le résonateur est considéré comme un guide d'ondes, la fréquence de coupure de celui-ci est supérieure à la fréquence de résonance dans une région de résonance. Le diamètre interne de la cavité est supérieur au diamètre d'un élément autre qu'une électrode.

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