Abstract: A screw-fixing implement which is low in cost and has a high reliability, a resonator device having the screw-fixing implement and having a characteristic adjusting function, a filter, an oscillator, and a communication device each containing the resonator device, and a method of adjusting a characteristic of the resonator device are provided. A nut 2 for fixing a characteristic-adjusting screw 1 is provided with a concave portion d in the vicinity to the axis of the fixing nut 2 and concaved in the thickness direction. A spring-washer 3 is provided with a convex portion p which is engaged with the concave portion d of the screw-fixing nut 2. The spring-washer 3 is sandwiched between a panel 4 and the screw-fixing nut 2. Then, the characteristic adjusting screw 1 is turned under an appropriate load. After the characteristic is adjusted, the screw-fixing nut 2 is tightened till the spring washer 3 is completely broken. Thus, these members are locked.

Abstract: A screw-fixing implement which is low in cost and has a high reliability, a resonator device having the screw-fixing implement and having a characteristic adjusting function, a filter, an oscillator, and a communication device each containing the resonator device, and a method of adjusting a characteristic of the resonator device are provided. A nut 2 for fixing a characteristic-adjusting screw 1 is provided with a concave portion d in the vicinity to the axis of the fixing nut 2 and concaved in the thickness direction. A spring-washer 3 is provided with a convex portion p which is engaged with the concave portion d of the screw-fixing nut 2. The spring-washer 3 is sandwiched between a panel 4 and the screw-fixing nut 2. Then, the characteristic adjusting screw 1 is turned under an appropriate load. After the characteristic is adjusted, the screw-fixing nut 2 is tightened till the spring washer 3 is completely broken. Thus, these members are locked.

Abstract: A dielectric resonance device includes at least one dielectric resonator having a hollow frame body often called the "cavity" in the art, cross-coupled dielectric pillars in the frame body, and an earth conductor on the outer surface of the frame body. The frame body has a pair of opposed openings at opposite ends thereof. A plurality of conductive plates are provided each of which has a first end coupled to the earth conductor and a second end. Two printed circuit boards acting as front and rear panel plates are attached to cover the openings, respectively. The second ends of the conductive plates are coupled by soldering to metal films of the first and second printed circuit boards while having the conductive plates folded to be in area-contact with and electrically connected to the printed circuit boards so as to tightly hold these boards. The dielectric resonator is held in a casing together with the conductive plates and the first and second printed circuit boards.

Abstract: A dielectric resonance device includes at least one dielectric resonator having a hollow frame body often called the "cavity" in the art, cross-coupled dielectric pillars in the frame body, and an earth conductor on the outer surface of the frame body. The frame body has a pair of opposed openings at opposite ends thereof. A plurality of conductive plates are provided each of which has a first end coupled to the earth conductor and a second end. Two printed circuit boards acting as front and rear panel plates are attached to cover the openings, respectively. The second ends of the conductive plates are coupled by soldering to metal films of the first and second printed circuit boards while having the conductive plates folded to be in area-contact with and electrically connected to the printed circuit boards so as to tightly hold these boards. The dielectric resonator is held in a casing together with the conductive plates and the first and second printed circuit boards.

Abstract: A dielectric resonance device includes at least one dielectric resonator having a hollow frame body often called the "cavity" in the art, cross-coupled dielectric pillars in the frame body, and an earth conductor on the outer surface of the frame body. The frame body has a pair of opposed openings at opposite ends thereof. A plurality of conductive plates are provided each of which has a first end coupled to the earth conductor and a second end. Two printed circuit boards acting as front and rear panel plates are attached to cover the openings, respectively. The second ends of the conductive plates are coupled by soldering to metal films of the first and second printed circuit boards while having the conductive plates folded to be in area-contact with and electrically connected to the printed circuit boards so as to tightly hold these boards. The dielectric resonator is held in a casing together with the conductive plates and the first and second printed circuit boards.