摘要:
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.
摘要:
A dielectric resonance element resonating in the TE01 δ 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.
摘要:
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.
摘要:
A dielectric resonator device comprising resonators small in size, having plural stages, and a dielectric resonator device with a high Qo, in a multimode are provided. A substantially parallelepiped-shaped dielectric core to resonate in plural modes such as TM01&dgr;-x, -y, -z, TE01&dgr;-x, -y, -z, and so forth is disposed in the center of a substantially parallelepiped-shaped cavity. These plural resonance modes are utilized.
摘要:
In a TM dual mode dielectric resonator apparatus, a cross-shaped TM dual mode dielectric resonator is provided in an electrically conductive case, and the TM dual mode dielectric resonator includes first and second dielectric resonators integrally formed so as to be perpendicular to each other, and there is further formed at least one coupling groove for coupling an operation mode of the first dielectric resonator with that mode of the second dielectric resonator, wherein the coupling groove is formed on at least one of front and back surfaces of a crossing portion of the first and second dielectric resonators, in a diagonal direction thereof so as to cut electric lines of force of either one of an odd mode and an even mode. Alternatively, at least one coupling projection may be formed instead of the coupling groove.
摘要:
A multimode dielectric resonator device is provided in which a dielectric core can be easily disposed in a cavity, a dielectric resonator device comprising resonators in plural stages can be obtained, and the Q0 is maintained at a high value. Dielectric cores 1b, 1c to resonate in plural modes such as TM01 &dgr;−(x−z), TE01&dgr;−y, TM01&dgr;−(x+z) or the like are supported substantially in the center of a cavity 2 by means of a support 3, in the state that the cores are substantially separated from the inner walls of the cavity 2 at a predetermined interval, respectively.
摘要:
A multiple-mode dielectric resonator in which a combined dielectric block formed of a plurality of dielectric elements combined into a crossed shape is used to cause three resonance modes along a plane defined by two of the dielectric elements, and in which the resonant frequency of each mode is determined, or a multiple-mode dielectric resonator in which the degree of coupling between predetermined resonance modes is determined. If first and third resonance modes are two TM110 modes having different lines of symmetry of electric field distributions, and if a second mode is a TM111 mode, dielectric-cut portions are formed in the combined dielectric block, for example, at positions where the electric field distribution of the first resonance mode is concentrated while the electric field distributions of the second and third resonance modes are not concentrated, thereby selectively determining the resonant frequency of the first resonance mode.
摘要:
A hydrostatic pressure bearing has a gas supply port and liquid supply ports on its bearing surface. A thin bearing clearance is defined by a hydrostatic pressure supporting force between the bearing and a rotor supported by the bearing by supplying a pressurized gas to the bearing surface through the gas supply port. A liquid is fed from the liquid supply ports into the bearing clearance to form a thin liquid film in the bearing clearance, and said liquid film reduces the rate of drop of the static pressure of the gas on the bearing surface.
摘要:
It is desirable to broaden a frequency adjusting range of a resonator, or an adjusting range of a coupling coefficient between two resonators, even in a downsized TM mode dielectric resonator by enhancing a ratio of frequency change relative to an amount of movement of a frequency adjusting dielectric rod, a frequency adjusting hole is formed in a direction orthogonal to a direction of an electric field which exists in a dielectric pillar at resonance, and a void is extended from the frequency adjusting hole in a direction that is orthogonal both to the electric field and also to the frequency adjusting hole. Thus the frequency adjusting range or the adjusting range of the coupling coefficient can be broadened even in a downsized TM mode dielectric resonator, even when the dielectric rod has a limited range of movement, without substantially enlarging the frequency adjusting dielectric rod.
摘要:
In a TM dual mode dielectric resonator apparatus, a cross-shaped TM dual mode dielectric resonator is provided in an electrically conductive case, wherein the TM dual mode dielectric resonator comprises first and second dielectric resonators integrally formed so as to be perpendicular to each other, and coupling grooves for coupling an operation mode of the first dielectric resonator with an operation mode of the second dielectric resonator are formed in the TM dual mode dielectric resonator. Cross-sectional areas or sizes such as thickness, widths or the like, of the first and second dielectric resonators are set so as to be different from each other. Alternatively, a hole for adjusting the resonance frequency is formed at an end of one of the first and second dielectric resonators so as to penetrate the same.