Abstract: A dielectric porcelain composition of the present invention includes a first component and second component. If the first component is represented by the general formula of xBaO—yNd2O3-zTiO2-wBi2O3 (provided that x+y+z+w=100), x, y, z, and w satisfy 12?x?16, 12?y?16, 65?z?69, and 2?w?5, respectively. The second component includes 30 to 37 wt % of BaO, 33 to 46 wt % of SiO2, 8 to 12 wt % of La2O3, 3 to 7 wt % of Al2O3, 0 to 1 wt % of SrO, 0 to 10 wt % of Li2O, 0 to 20 wt % of ZnO, and 7 wt % or less of B203. The compounding ratio of the second component is between 10 wt % and 30 wt % when the sum of the first and second components is 100. In addition, 0.1 to 1 parts by weight of Li2O and 3 to 10 parts by weight of ZnO, relative to 100 parts by weight of the sum of the first and second components, is also contained as a third component. An average particle diameter of the dielectric mixed powder forming dielectric porcelain composition before firing is 0.9 ?m or less.

Abstract: A dielectric resonator device including a circuit substrate with a top surface provided with transmission lines, and a bottom surface provided with a ground electrode; a dielectric substrate with opposite surfaces that are respectively provided with electrodes having circular openings so as to form a TE010-mode resonator; and an insulating layer disposed between the ground electrode of the circuit substrate and the electrodes of the TE010-mode resonator. The TE010-mode resonator is attached to the circuit substrate with an insulative adhesive. Accordingly, a current path remains unchanged even if the circuit substrate and the TE010-mode resonator are partially disengaged from each other, thereby achieving stable characteristics.

Abstract: A plurality of through-hole vias connected to conductor layers is disposed with gaps left between these vias around opening parts disposed in the conductor layers in a printed board in which these conductor layers are disposed parallel to each other so as to sandwich a dielectric layer in between. Furthermore, through-hole vias used for excitation are disposed in the opening parts of the conductor layers and regions of the dielectric layer matching these opening parts in a non-contact manner with the conductor layers. When the complex dielectric constant is measured, a high-frequency power is applied to the through-hole vias, and the power loss between the through-hole vias and the conductor layers is measured by the S parameter method.

Abstract: A filter module suitable for the filtering of electromagnetic waves includes a dielectric cylindrical resonator and one or more lines that supply or draw off electromagnetic waves to or from the dielectric resonator. The lines terminate in a contacting structure. The resonator has a variable separation from the lines, whereby the separations may be conceived in both the negative as well as alternatively in the positive longitudinal direction (z-axis) of the resonator. The transmitted signal power may be significantly increased in an advantageous manner relative to conventional coupling structures by means of the above. The above is particularly suitable for application in oscillator circuits with operating frequencies above 18 GHz, such as typically find increasing application in environment systems of a motor vehicle such as Lane Departure Warning (LDW), Blind Spot Detection (BSD) or Rear View Detection.

Abstract: The invention is an apparatus and technique for tuning the cross coupling of resonators in a dielectric resonator circuit. A cross coupling element such as a coaxial cable having a first end positioned adjacent a first resonator in the circuit and a second end position adjacent a second resonator is supported on the housing of the circuit intermediate its first and second ends. At least one end of the cross coupling element is in contact with a cross coupling tuning element that extends through an external wall of the housing so that it can be manipulated from outside of the housing to move the corresponding end of the cross coupling element relative to the adjacent resonator inside the housing without opening the housing.

Abstract: A dielectric resonator circuit is provided that is tunable over a broad frequency range and/or a broad bandwidth range. The center frequency is made tunable over a broad range by use of a dielectric tuning plug that is positioned in a through hole within the resonator. The bandwidth is made tunable over a broad range by tilting the resonators relative to the enclosure to increase the effective height of the cavity as seen by the resonator.

Abstract: A dielectric device includes a dielectric substrate and a resonator unit. The resonator unit includes first and second holes. The first hole opens on a first surface of the dielectric substrate and extends toward a second surface opposite to the first surface. A first internal conductor is provided inside the first hole. The second hole opens on a third surface of the dielectric substrate, extends toward a fourth surface opposite to the third surface, and is connected to the first hole. A second internal conductor is provided inside the second hole with one end connected to an external conductor film on the third surface and the other end connected to the first internal conductor. The first hole has a recess opposed to a junction with the second hole. The first internal conductor in the recess is opposed to the external conductor film on the fourth surface across the dielectric substrate.

Abstract: A voltage tunable resonator is provided, including a dielectric base made of a dielectric material having at least one of a voltage dependent dielectric constant and piezoelectric characteristics. A metal contact having a predetermined area is provided on an outer surface of the dielectric base at a predetermined location to provide a predetermined loaded Q for the resonator, and a metal ground coating is provided on the remaining exposed surfaces of the dielectric base, and an isolation region having a sufficient area to prevent significant coupling between the metal contact and the metal ground coating. A control voltage applied between the metal contact and the metal ground coating provides at least one of (i) a variable electric field to control the dielectric constant and a resonant frequency of the resonator and (ii) a piezoelectric response causing a dimensional change in the resonator to control the resonant frequency of the resonator.

Abstract: A dielectric resonator is disclosed. In one embodiment, the resonator includes i) a conductive case having a plurality of walls which together define an inner space, ii) a substrate placed at the bottom of the conductive case, and iii) a cylindrical dielectric resonator unit, mounted centrally on the substrate having a central longitudinal axis. The cylindrical dielectric resonator unit includes a dumbbell shaped hole located centrally in the resonator unit extending from a top to a bottom of the resonator unit. In one embodiment, the dumbbell shaped hole includes i) a top layer, ii) a bottom layer and iii) an intermediate layer sandwiched between the top and bottom layers. In one embodiment, the substrate and resonator unit are enclosed inside the conductive case.

Abstract: The present invention provides an RF module capable of outputting balanced electromagnetic waves without requiring adjustment and easily realizing miniaturization. The RF module includes: a waveguide (3) having an area which is surrounded by a pair of ground electrodes (6) and (7) provided so as to face each other and through holes (8) for making electric conduction between the pair of ground electrodes (6) and (7) and in which electromagnetic waves in the TE mode can propagate and a one-wavelength resonator (11) is formed; and a pair of output lines (4a) and (4b) connected to portions corresponding to half-wavelength resonance regions (A) and (B) of the one-wavelength resonator (11) in the ground electrode (6).

Abstract: A superconductive device that includes a ground film made of the superconductive material, wherein part of the ground film has an opening pattern.

Abstract: A high-frequency dielectric ceramic composition that has excellent dielectric properties, such as a large ?r, a large Q-value, and a small absolute value of ?f, even in a high-frequency region, such as a microwave region or a millimeter wave region, and that can be fired at 1400° C. or less, which is much lower than before, is provided. The high-frequency dielectric ceramic composition contains 100 parts by weight of main component and 0.005-0.300 parts by weight (on a B2O3 basis) of accessory boron compound. The main component has a composition formula of (1?y)xCaTiaO1+2a?(1?y)(1?x)Ca(M1z/3M22/3)bO1+2b-yLnAlcO(3+3c)/2, wherein x and y denote moles , and x, y, z, a, b, c, and ? (wherein ?=(1?y)x) satisfy the following relationships: 0.56?x?0.8, 0.08?y?0.18, 0.980?z<1.000, ??0.65, 0.985?a?1.05, 0.9?b?1.02, and 0.9?c?1.05.

Abstract: A substantially circular electrode 3 is arranged on a surface 2A of a dielectric substrate 2 of a TM010-mode resonator 1. A coupling line 5, which extends along a diameter of the substantially circular electrode 3, is arranged on a back surface 2B of the dielectric substrate 2, and back-surface electrodes 7 are arranged with the coupling line 5 interposed therebetween in the width direction. Furthermore, signal lines 11 and ground electrodes 13 are arranged on a surface of an external substrate 10 in positions other than portions facing the coupling line 5 of the TM010-mode resonator 1. The signal lines 11 are connected to the coupling line 5 of the TM010-mode resonator 1 and the ground electrodes 13 is connected to the back-surface electrodes 7.

Abstract: In accordance with the principles of the present invention, a dielectric resonator is provided with a longitudinal through hole with a diameter that varies as a function of height of the resonator so as to increase the frequency spacing between the fundamental mode and the spurious modes.

Abstract: There is provided a resonance circuit using piezoelectric vibrator such as a quartz resonator, a coil, a capacitor, or an element equivalent to them in combination. When two resonance circuits having different resonance frequencies are combined, it is possible to configure an oscillation circuit and a filter capable of freely adjusting the frequency characteristic by utilizing the phenomenon that by changing the excitation current or voltage of the respective resonance circuits independently from each other, antiresonance frequency of the entire composite resonance circuit can be changed.

Abstract: An oscillator comprising a dielectric resonator (DR) has a high controllability and reproducibility of coupling between the dielectric resonator (DR) and an oscillation circuit, and an integrated circuit is reduced in size. The dielectric resonator (DR) (1) is composed of a dielectric substrate (2), grounding conductive layers (3a, 3b) formed on both sides of the dielectric substrate (2), and via holes (4a) for electrical connection between the conductive layers. A coupling element (7a) composed of a slot (5a) provided in the central portion of the grounding conductive layer (3a) and a patch (6a) surrounded by the slot (5a) is coupled to the dielectric resonator (DR) (1). The patch (6a) is connected to a transmission line (13a) on an oscillation circuit (9) through a bump (8). The transmission line (13a) is connected to the ground through a termination resistor (15a).

Abstract: The invention comprises a technique and associated mechanisms by which dielectric resonator circuits, such as filters, can be tuned in both frequency, bandwidth or both without the need for irises, tuning screws and/or tuning plates. In accordance with the invention, the positions of the dielectric resonators are adjustable relative to each other within the cavity in multiple ways, including vertically and horizontally. The dielectric resonators also may tilt relative to each other. Furthermore, an off-center longitudinal hole can be machined in one or more of the dielectric resonators so as to make the electromagnetic field of the resonator non-uniform so that the dielectric resonator can be rotated about its longitudinal axis to alter the coupling between dielectric resonators.

Abstract: In order to permit electronic tuning of the frequency of a circuit including dielectric resonators, such as a dielectric resonator filter, tuning plates are employed adjacent the individual dielectric resonators. The tuning plates comprises two separate conductive portions and an electronically tunable element electrically coupled therebetween. The electronically tunable element can be any electronic component that will permit changing the capacitance between the two separate conductive portions of the tuning plates by altering the current or voltage supplied to the electronically tunable element. Such components include virtually any two or three terminal semiconductor device. However, preferable devices include varactor diodes and PIN diodes.

Abstract: A microwave filter has resonator comprised of a cylindrical structure having conductive walls filled with a dielectric material where the cylindrical structure is recessed inside a multi-layered substrate. First and second conductive coupling arms are disposed on a top layer of the substrate for coupling signals to the cylindrical structure. The conductive coupling arms are separated by a dielectric layer. The first and second conductive coupling arms extend away from the center of the cylindrical structure to form a microstrip line. The cylindrical structure further comprises a bottom portion having a solid conductive bottom plate perpendicular to the axis of the cylinder and a bottom conductive ground layer separated from the conductive bottom plate by a second dielectric layer.

Abstract: The invention relates to a high frequency component with a substrate constructed of a plurality of dielectric layers and, between them, electrode layers having conducting track structures, in which substrate at least one capacitive element and at least one inductive element is formed, whereby at least one arrangement of opposed conducting track 5 structures is provided, these realizing simultaneously a capacitive and an inductive element, whereby the common-mode impedance and the push-pull impedance between the opposing conducting track structures are adjusted to differ by a factor of at least 2.

Abstract: Two TE modes whose electric-field rotating planes have a perpendicular relationship are coupled independently of the coupling between two TM modes whose electric-field directions have the same respective perpendicular relationships. In a multimode dielectric resonator device producing four modes: TM01?_x mode, TM01?_y mode, TE01?_x mode, and TE01?_y mode, protrusions (Pe1), (Pe2) are disposed on an upper-layer (La) and a lower-layer of a dielectric core (1) to cause a difference in effective dielectric constants of individual parts through which even-mode and odd-mode electric flux of the TE coupling modes passes. A protrusion (Pc) is formed on a middle-layer Lb of the dielectric core (1) such that the effective dielectric constants of the parts through which even-mode and odd-mode electric flux of the TM coupling modes pass become substantially equal. Thereby, the TE01?_x mode and TE01?_y mode are coupled while restraining the coupling of the TM01?_x mode and the TM01?_y mode.

Abstract: A dielectric ceramic material consisting essentially of a composition of Formula 1 xATiO3(1?x)NdzRe(1?z)AlO3 ??(1) doped with 0.005% to 5% of a dopant selected from the group consisting of: cerium oxide, manganese oxide and mixtures thereof; wherein A may be selected from the group consisting of: Ca, Sr, Mg and mixtures thereof; Re may be selected from a group consisting of La, Sm, Pr, Dy, Er, Gd, Y and mixtures thereof; wherein z is from 0.95 to 0.995; and wherein x is a positive number less than 1.

Abstract: A dielectric ceramic filter with a metal guide can is provided. The dielectric ceramic filter includes a metal guide can coupled to and projecting from both input/output ends of the dielectric ceramic filter. Alternatively, the dielectric ceramic filter includes: a dielectric block having a plurality of vertical grooves formed in its side surfaces, wherein a conductive material is coated on all surfaces of the dielectric block except its ends; and a metal guide can covering both ends of the dielectric block, wherein the metal guide can is a conductive metal plate projecting from both ends of the dielectric block.

Abstract: A dielectric resonator having variable cross-section, preferably varying monotonically, and, most preferably, the resonator being in the shape of a truncated cone. Such shapes displace the H11 mode from the TE mode in the longitudinal direction of the cone. Truncating the cone to eliminate the portion of the cone where the H11 mode exists, virtually eliminates the H11 mode. A circuit comprising a plurality of these resonators may be arranged in an enclosure with each resonator longitudinally inverted relative to adjacent resonator(s) to provide a compact design with enhanced coupling and adjustability. A spiral coupling loop provides high magnetic flux in a small physical volume for coupling energy into or out of the circuit. Alternately, the resonator can coupled to a microstrip by placing the resonator upside-down near the microstrip, whereby the TE mode is immediately above the microstrip, providing enhanced coupling there between.

Abstract: In a high-frequency circuit having a substrate having a high-frequency transmission line and an dielectric resonator formed on said substrate so that said dielectric resonator and said high-frequency transmission line may be coupled electro-magnetically to each other, a hole part or a cavity part is formed at a part of said substrate and a dielectric resonator is embedded in said hole part or said cavity part. In the same object, a high-frequency circuit having a dielectric resonator is produced by the step for forming a high-frequency transmission line on a substrate, the step for forming a hole part or a cavity part on a part of the substrate, and the step for mounting a dielectric resonator in the hole par formed on the surface of the substrate.

Abstract: There is disclosed a whispering gallery oscillator for producing a low noise microwave output signal. The whispering gallery oscillator comprises a dielectric resonator 1 comprising paramagnetic ions 34. A pump signal 5 is coupled by a coupler 7 to the paramagnetic ions to excite 19 the paramagnetic ions 34. The paramagnetic ions 34 decay 17 and thus excite a whispering gallery mode 15 of the dielectric resonator 1. The whispering gallery mode 15 is coupled by a coupler 10 to give an output signal 9. The whispering gallery mode 15 has a high Q (Q?107) resonance. The high Q resonance results in a low-noise output signal 9. The paramagnetic ions 34 act as a MASER that is distributed about the dielectric resonator 1. In some embodiments, the whispering gallery oscillator may be locked to a frequency standard.

Abstract: A dual mode ceramic filter has an enclosure with two cavities separated by a wall, and two TM dual-mode resonators, each TM dual-mode resonator positioned in a corresponding cavity. Each TM dual-mode resonator has first and second modes, and a body having a central portion with a plurality of arms extending outwardly from the central portion. The filter also has two input conductive members, each input conductive members positioned in a corresponding cavity. Each input conductive member is disposed proximate a corresponding TM dual-mode resonator for coupling between the input conductive member and the TM dual-mode resonator.

Abstract: A RF interconnect comprising a dielectric resonator is disclosed. The dielectric resonator may be included in an interconnect housing. The dielectric resonator includes metalized side surfaces useful for securing the dielectric resonator in an aperture formed in the interconnect housing. The dimensions or material selected for the dielectric resonator may be predetermined to enable the dielectric resonator to operate as a filter or waveguide, as desired.

Abstract: Systems and methods are disclosed herein to provide filters for radio frequency applications. For example, in accordance with an embodiment of the present invention, a radio frequency filter includes a first dielectric layer having a first dielectric constant and a second dielectric layer having a second dielectric constant and disposed between the first dielectric layers, wherein the first dielectric constant is greater than the second dielectric constant.

Abstract: In accordance with the principles of the present invention, a resonator puck is provided with one or more vertical and/or horizontal, radial slits that improve the quality factor, Q, of circuits constructed from the resonators. In some embodiments of the invention, the surfaces of the resonators that define the slit are left relatively rough and may even contact each other such that the slit is not of uniform thickness, but essentially comprises a plurality of pockets between the two portions of the resonator.

Abstract: Electrodes (2) and (3) are formed on the front face (1A) and the rear face (1B) of a dielectric substrate (1). Fan-shaped apertures (4A) and (4B) forming a resonator (4) are formed in the electrodes (2) and (3) such that the fan-shaped aperture (4A) opposes the fan-shaped aperture (4B). Accordingly, two parameters, that is, the radius and the central angle, of the fan-shaped apertures (4A) and (4B) can be used to set the resonant frequency of the resonator (4), thus improving the flexibility in design of the resonator (4).

Abstract: The present invention relates to an improved tuning arrangement to linearise the sensitivity to frequency changes within a certain frequency range in response to tuner displacements relative to a resonator body. The tuning arrangement comprises a tuner and/or resonator having a non-uniform distribution of the effective dielectric permittivity along the axis of tuner displacement. The non-uniform distribution of the effective dielectric permittivity is realised by subdividing the tuner into an arbitrary number of sections, each of which distinguishable at least by their geometrical shape and the value and distribution of the dielectric coefficient ?r.

Abstract: An RF cavity resonator that includes: a resonator chamber for containing an RF field; an RF coupling element coupled to the resonator chamber for introducing the RF field into and extracting the RF field from the resonator chamber; a tuning assembly for causing the RF field to resonate at a desired frequency, wherein at least a portion of the tuning assembly is coupled within the resonator chamber; and a heat transport element included in the tuning assembly for transporting heat from the RF cavity resonator, the heat transport element comprising a phase change material, a housing for enclosing the phase change material, means for circulating the phase change material within the housing, and an electrically conductive surface for isolating the phase change material from the RF field, wherein the phase change material undergoes a phase change during circulation within the housing.

Abstract: An RF cavity resonator (400) that includes: a resonator chamber (410) for containing an RF field; an RF coupling element (450, 452) coupled to the resonator chamber for introducing the RF field into and extracting the RF field from the resonator chamber; a tuning assembly (420) for causing the RF field to resonate at a desired frequency, wherein at least a portion of the tuning assembly is coupled within the resonator chamber; and a heat transport element (440) for transporting heat from the RF cavity resonator, wherein at least a portion of the heat transport element is coupled within the resonator chamber, the heat transport element including a phase change material, a housing for enclosing the phase change material, means for circulating the phase change material within the housing, and an electrically conductive surface for isolating the phase change material from the RF field.

Abstract: A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other within an enclosure in a very efficient and compact design that enhances adjustability and coupling between adjacent resonators and the cross-coupling of alternate resonators.

Abstract: A push-push high frequency oscillator comprises a pair of amplifiers for oscillation, a loop-shaped microstrip line for connecting inputs of the pair of amplifiers to each other and connecting outputs of the pair of amplifiers to each other, a slot line disposed between the inputs and the outputs of the pair of amplifiers for electromagnetically coupling with the microstrip line, a nonlinear circuit for enhancing the level of harmonic components in an applied synchronization signal, a coupler circuit for electromagnetically coupling the output of the nonlinear circuit to the microstrip line, and a filter circuit disposed at the output of the nonlinear circuit. The filter circuit filters harmonic components of the synchronization signal such that the two oscillation systems are injected with the same frequency components as the fundamental wave or frequency components twice as high as the fundamental wave to increase frequency stability.

Abstract: In a dielectric resonator device, the outer shape of a support base is larger than the bottom surface of a dielectric core which is in contact with the support base, and the support base is fixed on the inner bottom surface of the cavity with support columns at the periphery of the support base. With this configuration, an air space can be provided between the inner bottom surface of the cavity and the support base. Accordingly, the resonant frequency of the TMz mode in which the electric field vector directs perpendicularly to the surface of the support base is increased so that it is considerably away from the resonant frequency of the TE01? multiple mode.

Abstract: A method of tuning a dielectric resonator uses a ferroelectric element to change the dielectric resonator electric field and hence the resonance frequency of the dielectric resonator.

Abstract: A dielectric ceramic composition is provided which exhibits a high unloaded quality factor (Qu) and permits regulation of the relative dielectric constant (?r) and the temperature coefficient (?f) of resonance frequency (fo) within specific ranges in accordance with use or application of the composition. A dielectric resonator is also provided which includes a resonator main body formed from the composition. The dielectric ceramic composition contains, as metallic components, Ba, Zn, Nb, Ta, and Sb, and the amounts of the metallic components, as reduced to their oxides, satisfy the following relations expressed in mol %: 57.5?BaO?62.6; 16.0?ZnO?22.2; 0<Nb2O5?20.6; 0<Ta2O5?20.6; and 0<Sb2O3?5.9.

Abstract: The invention relates to a micromechanical resonator having a bondable resonance body and a method for fabricating a micromechanical resonator for semiconductor components. The invention provides that the resonator (26) is composed successively of a first layer (16) of silicon for coupling the resonator (26) in terms of a circuit, an insulating layer (14) of silicon dioxide, a cylindrical base layer (cylinder 18), and a metal layer (20) completely surrounding the cylinder (18). The method provides that a cylindrical structure (18) (cylinder) is etched (trench etching process) in a base layer (12) of p?-doped silicon (SOI wafer) separated from a layer (16) of silicon by an insulating layer (14), and the cylindrical structure (18) is coated with a metal layer (20).

Abstract: In accordance with the principles of the present invention, a resonator puck is provided with one or more vertical and/or horizontal, radial slits that improve the quality factor, Q, of circuits constructed from the resonators. Preferably, the slits are very narrow and, more preferably, about 100 to 1000 atoms wide. In some preferred embodiments of the invention, the surfaces of the resonators that define the slit are left relatively rough and may even contact each other such that the slit is not of uniform thickness, but essentially comprises a plurality of pockets between the two portions of the resonator.

Abstract: A tunable RF cavity resonator having reduced generation of passive inter-modulation, the tunable RF cavity resonator including a cavity body, a fixed tuning post at a first end of the cavity body, a dielectric rod in the fixed tuning post interior space with a first spatial gap between the dielectric rod outer surface and the fixed tuning post inner wall, a tuning screw connected to a first end of the dielectric rod, and a tuning element disposed on a second end of the dielectric rod so that the tuning element moves within the interior space of the fixed tuning post while maintaining a second spatial gap between the tuning element outer surface and the fixed tuning post inner wall. Accordingly, the tuning element forms a short section of very low RF impedance transmission line thereby preventing RF signal leakage through the interior space of the fixed tuning post.

Abstract: An electromagnetic wave is input to a resonator 14 filled with a dielectric and a gas, and a resonance frequency, an insertion loss and a half-power width in the resonance mode of the electromagnetic wave output from the resonator 14 are measured by a network analyzer 16 in response to the input of the electromagnetic wave and the complex dielectric constant of the dielectric is calculated from the resonance frequency, the insertion loss and the half-power width which are thus measured.

Abstract: A half wave dielectric resonator assembly including a resonator cavity having a top surface and a bottom surface, an elongated cylindrical dielectric resonator positioned within said resonator cavity and first and second insulative supports to couple and insulate the ends of the cylindrical dielectric resonator from the resonator cavity. The dielectric resonator has a substantially small diameter to length ratio. The resonator assembly provides improved spurious performance and quality factor (Q) at a lower mass. A resonator filter is constructed using a plurality of these resonator assemblies, where adjacent pairs of said resonator cavities are separated from each other by a common cavity wall. By forming a first iris opening formed within a first common cavity wall and forming a second iris opening formed within a second common cavity wall having a position that is vertically offset from the position of the first iris, it is possible to reduce stray coupling.

Abstract: The present invention incorporates triple-mode, mono-block resonators that are tunable. Four novel and unobvious methods of tuning are disclosed. The first tuning method is to mechanically grind areas on three orthogonal faces of the mono-block in order to change the resonant frequencies of the three modes in each block. Another method of tuning frequency is to cut a slot within a face of the resonator. A third method of tuning the mono-block is to tune the resonant frequency of a particular mode by removing small circular areas of the conductive surface from a particular face of the mono-block. The fourth, tuning method is the use of discrete tuning elements, with 3 elements distributed among three orthogonal faces of the mono-block, to affect the necessary change of the resonant frequencies.

Abstract: A dielectric filter is provided with a dielectric multilayer structure formed by layering two or more dielectric layers which have different relative permittivities, at least one feeding electrode formed between any dielectric layers or formed inside of any dielectric layers of the dielectric multilayer structure, and a shield portion that covers the outer surface of the dielectric multilayer structure and is made of a conductive material placed so as to fit on the outer surface without any gap.

Abstract: A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other within an enclosure in a very efficient and compact design that enhances adjustability and coupling between adjacent resonators and the cross-coupling of alternate resonators.

Abstract: A high-frequency dielectric ceramic composition that has a high Q-factor as well as a large relative dielectric constant, and in which temperature coefficient of the resonant frequency (?r) can be controlled to around 0 ppm/° C. is provided. The dielectric ceramic composition has a general formula of Ba[(Sn?Zr1-?)xMgy(Nb?Ta1-?)z]vOw, wherein molar ratios x, y, and z are within an area defined by points A (0.30, 0.22, 0.48), B (0.60, 0.12, 0.28), C (0.60, 0.14, 0.26), and D (0.30, 0.25, 0.45) in a ternary diagram, and are not on the line between points A and D, x+y+z=1.00, 0.5???1.0, 0???1.0, 0.98?v?1.03, and w is a positive value to keep the composition electroneutral.

Abstract: A high-frequency circuit device includes a dielectric member 1, a shielding conductor 2 surrounding the dielectric member 1, a support member 3 for fixing and supporting the dielectric member 1, and a pair of transmission lines 4 each of which is formed of a microstrip-line. Each of the transmission lines includes a substrate 6 formed of a dielectric material, a strip conductor 5, and an earth conductor layer 9. An end portion of the strip conductor 5 faces part of the dielectric member 1 and functions as a coupling probe for input/output coupling. Each of the transmission lines 4 is formed of a strip line, a mictostrip line, a coplanar line or the like, and has low-loss when connected to a circuit board.

Abstract: A tunable filter having a resonator with a resonant frequency dependent upon a variable gap is provided. The variable gap may be controllably altered by use of an actuator. The resonator is a high Q resonator that may be formed by a ring resonator, microsphere, microdisc, or other high Q optical structures. Actuation is preferably achieved through an electrostatic actuator that moves a dielectric plate relative to the resonator in response to measured values of gap and temperature.