| 摘要 |
PURPOSE: To obtain a miniaturized lamination type dielectric filter reduced at its conductor loss by arranging a connection electrode, an input electrode, an output electrode, and a turning capacity ground electrode between the layers of respective resonance elements constituting two-layered structure. CONSTITUTION: Resonance elements 21, 22 respectively consists of two strip lines 71, 72 and 73, 74 formed on positions corresponding to the upper faces of two dielectric layers 14, 15. A connection electrode 91, an input electrode 41 and an output electrode 42 are formed on the upper face of another dielectric layer 13 inserted between the layers 14, 15. A turning capacity ground electrode also is similarly formed. A face opposing interval between the two strip lines 71, 72 and 73, 74 respectively superposed in the vertical direction, the two strip lines 72, 72 and 73, 74 are respectively functioned as single resonance elements even if their released end side is not short-circuited. Since the connection electrode 91 or the like is formed between two opposite strip lines, electric lines of fore are not interrupted, no-load Q can be increased, the length of the elements 21, 23 can be shortened, and the lamination type filter 1 can be miniaturized. |
