| 摘要 |
<p>A dielectric filter, a dielectric duplexer, and a communication apparatus using them allow balanced input and/or output to be implemented without requiring a balun. Using a dielectric block (1), two lambda /2 resonators are individually formed using either inner-conductor-forming openings (2a,2b) with inner conductors (4a,4b). Therein, or stripline-type conductors, both of said conductors having both ends open0circuited, and said conductors (4a,4b) being capacitively coupled together. Terminal electrodes (5,6) coupled to the vicinities of two open-circuited ends of one of the resonators are used as balanced terminals on one side, and terminal electrodes (7,8) coupled to the vicinities of the two open-circuited ends of the other one of the resonators are used as balanced terminals on the other side. <IMAGE></p> |
