Abstract: A multilayer ceramic electronic component includes a laminated body including dielectric layers and internal electrode layers, and first and second external electrodes. The laminated body further includes a first conductor layer, a first insulating coating layer, a second conductor layer, and a second insulating coating layer. The surface of the first conductor layer closer to a first end surface is partially connected to the first external electrode. The surface of the second conductor layer closer to a second end surface is partially connected to the second external electrode.

Abstract: A multilayer ceramic electronic component includes a laminated body including dielectric layers and internal electrode layers, and first and second external electrodes. The laminated body further includes a first conductor layer, a first insulating coating layer, a second conductor layer, and a second insulating coating layer. The surface of the first conductor layer closer to a first end surface is partially connected to the first external electrode. The surface of the second conductor layer closer to a second end surface is partially connected to the second external electrode.

Abstract: A dielectric resonance element resonating in the TE01 ? mode and a protrusion portion disposed in a direction perpendicular to the bottom surface of the dielectric resonance element are integrally molded, and the side face at the outer periphery of the protrusion portion is tilted such that the area on the bottom-surface side of the dielectric resonance element is larger than the area of the lower surface of the protrusion portion. Because of such a structure, the magnetic field of the dielectric resonance element spreads to the tilted portion of the side face at the outer periphery of the protrusion portion and around the tilted portion of the side face, and the magnetic field distribution increases under the dielectric resonance element. Even if an input-output electrode is disposed at a location away from the protrusion portion, the input-output electrode is strongly coupled to the dielectric resonance element, resulting in a sufficient coupling.

Abstract: An oscillation apparatus has a multi-mode dielectric resonant element; a plurality of oscillation circuits, each including a line coupled to the dielectric resonant element and active devices connected to ends of the line; and a substrate having the lines and the active devices provided thereon. The dielectric resonant element is placed on the substrate. The magnetic fields, occurring in the dielectric resonant element, in a plurality of resonant modes having different resonant frequencies are coupled to the corresponding lines in the plurality of oscillation circuits.

Abstract: An oscillation apparatus has a multi-mode dielectric resonant element; a plurality of oscillation circuits, each including a line coupled to the dielectric resonant element and active devices connected to ends of the line; and a substrate having the lines and the active devices provided thereon. The dielectric resonant element is placed on the substrate. The magnetic fields, occurring in the dielectric resonant element, in a plurality of resonant modes having different resonant frequencies are coupled to the corresponding lines in the plurality of oscillation circuits.

Abstract: A dielectric resonance element comprises a dielectric member integrally formed and composed of first and second plate portions which intersect each other such that respective center lines of the plate portions are coincident with each other. The first and second plate portions cause TE01&dgr; resonance modes to develop, in which the electric field vectors of the TE01&dgr; resonance modes are turned in the in-plane directions of the plate portions.

Abstract: A dielectric resonator comprising a resonator section and a supporting base section which are made of the same dielectric material as a single unit. The resonator section and the supporting base section have substantially the same outside diameter. A concave section having a trapezoidal cross-sectional shape is provided within the supporting base section such that the inside diameter of the supporting base section becomes smaller in the direction from the end face, which is used as a mounting face, and toward the resonator section.

Abstract: A frequency adjustment mechanism for a dielectric resonator in which a change of a unloaded Q is small by adjustment of a resonating frequency, a tuning rod may be stably fixed in place after the adjustment without using any adhesives or the like and it is possible to readily perform the re-adjustment. A hole 14 is provided at an axially central portion of the dielectric resonator 11 and the tuning rod 15 is threadingly inserted into the hole 14. A female screw thread 14a is formed in an inner circumferential surface of the hole 14, and a male screw thread 15a is formed on an outer circumferential surface of the tuning rod 15. Resin layers 16 and 17 are formed on surfaces of the female screw thread 14a and the male screw thread 15a, respectively. The tuning rod 15 is made of dielectric material having a low loss and a high dielectric constant. The resin layers 16 and 17 are made of resin material having an elasticity and a low loss.

Abstract: A mechanism for adjusting the resonance frequency of a dielectric resonator having TE.sub.01.delta. mode as its operation mode under the presence of the electromagnetic field including: a hole extending along the axis of the dielectric resonator; a tuning bar, made of a dielectric material of a low loss, having a male screw formed on the peripheral surface thereof; and a female screw, to engage the male screw, formed on the wall of the hole. The tuning bar is reciprocated in the hole with the tuning bar engaging the hole so as to adjust the resonance frequency.

Abstract: A band elimination filter which includes at least one or more TM-mode dielectric resonators each including a ceramic casing with an electrically conductive film formed over its inner surface or outer surface, and a dielectric column disposed in a cavity in the ceramic casing, and an electrode provided on the ceramic casing, out of contact with the electrically conductive film, with transmission lines being connected to the electrode.

Abstract: A dielectric resonating device comprises a conductive case, a bar-shaped dielectric resonator body located in the case, exciting means for exciting the dielectric resonator body, and at least one plate located between the case and the dielectric resonator body, forming at least two resonators of said device. An inner peripheral end of the plate is fixed to the dielectric resonator body. An outer peripheral end of the plate is located to face the case and define therewith a gap for coupling adjustment between the two resonators.The exciting means has electrodes connected to both ends of the dielectric resonator body, and input and output connectors fixed to the electrodes. The electrodes each have the shape of a flat plate and they are located with a gap between them and the case.

Abstract: In a dielectric filter which has a plurality of dielectric resonators of a TM.sub.010 mode or its modified mode, each dielectric resonator has one dielectric solid body disposed in series with a metallic case having top and bottom faces and at least one side face. A conductive film is provided to form the actual current paths on the surface of the ceramic case, and a conductive plate is provided between the dielectric resonators to electrically connect the resonators with each other, whereby a given electro-magnetic combination is caused between the adjacent dielectric resonators so as to provide a dielectric filter having given characteristics.

Abstract: The dielectric resonator apparatus is characterized in that electric walls exist on one plane or two including the central axis of the electromagnetic field distribution in the using mode of a dielectric resonator, a dielectric resonator with either of dielectrics between the electric wall being removed in shape is provided by plurality, an equivalent axis is common to the central axis of each of the dielectric resonators, with the dielectric resonators being inductively coupled in the axial direction. A dielectric resonator which prevents the current from being concentrated on the central axis of the electromagnetic field distribution, is collectively smaller in the Joule loss and is higher in Q. The dielectric resonator of the present invention is characterized in that the dielectric close to the central axis is removed, wherein electric walls exist on one plane or two including the central axis of the electromagnetic field distribution in a dielectric resonator using, for instance, a TE.sub.01.delta.