| 摘要 |
PROBLEM TO BE SOLVED: To provide a means capable of maintaining the uniform parallelopiped shape even when the central frequencies of respective filtering parts are considerably different concerning a dielectric filter equipped with plural filtering parts like a dielectric resonator or the like. SOLUTION: Concerning the dielectric filter provided with plural filtering parts F1 and F2 , since holes 20 for adjustment are respectively formed near respective resonators 3A-3C at the filtering part F1 on the side of high central frequency, the ratio of central frequencies between the adjacent filtering parts F1 and F2 can be achieved by setting an effective dielectric constant to a prescribed ratio and when the dielectric constant is adjusted by forming the holes 20 for adjustment, the prescribed central frequency can be provided. Therefore, a dielectric porcelain block 2 can be shaped into uniform parallelopiped. |
