Murata Manufacturing Co., Ltd.

Murata Mfg. Co., Ltd.

Hidekazu Wada

Youhei Ishikawa

Shin Abe

Toru Kurisu

Hiroyuki Kubo

Toru Tanizaki

Sadao Yamashita

Toshio Nishikawa

Shigeji Arakawa

Koichi Takehara

Kouichi Takehara

Hiroshi Nishida

Seiji Hidaka

Jun Hattori

Taiyo Nishiyama

Shinichi Kunioka

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.

Manufacturing apparatus for manufacturing TM dual mode dielectric

In a TM dual mode dielectric resonator apparatus including a cross-shaped TM dual mode dielectric resonator provided in an electrically conductive case, the cross-shaped dielectric resonator being comprised of first and second dielectric resonators, mode coupling means such as at least one groove or the like for coupling an operation of the first dielectric resonator with that of the second dielectric resonator is formed in the TM dual mode dielectric resonator. At least one first projection of a dielectric material for adjusting a coupling coefficient between the two dielectric resonators is formed on a portion of the crossing portion, wherein an adjustment amount of the coupling coefficient when the first projection is removed is previously determined. Further, respective at least one second and third projections of dielectric materials for adjusting resonance frequencies of the first and second dielectric resonators are formed respectively in a portion of the first dielectric resonator other than the crossing portion and in another portion of the second dielectric resonator other than the crossing portion.

TM dual mode dielectric resonator apparatus and methods for adjusting

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.

TM dual mode dielectric resonator and filter utilizing a hole to

TM dual mode dielectric resonator apparatus with a method for adjusting

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. Sizes such as thicknesses, widths or the like, of the first and second dielectric resonators are different from each other for adjusting the resonance frequency

TM dual mode dielectric resonator and filter utilizing different size

In an antenna supervising apparatus for supplying a multiplexed signal comprised of a plurality of carrier wave signals respectively outputted from a plurality of transmitters through a transmission line to an antenna, a directional coupler detects progressive signals of the multiplexed signal to the antenna and the reflected signals thereof from the antenna, and a band-pass filter respectively filters the progressive signal and the reflected signal of one carrier wave signal preselected among those of the detected multiplexed signal. Further, a detector respectively detects the filtered progressive signal and the filtered reflected signal of the one carrier wave signal, and a micro processing unit calculates a standing wave ratio with respect to the preselected one carrier wave signal based on the detected signals.

Antenna supervising apparatus comprising a standing wave ratio measuring

A dielectric resonator apparatus is provided with a dielectric resonator which has a generally spherical dielectric placed within a shield case having a rectangular cavity, and uses each resonance of a x mode, a y mode and a z mode of TE.sub.101, where an electric field is caused respectively around a x axis, a y axis and a z axis of a rectangular coordinate system predetermined in the dielectric, and an external coupling means for coupling the above described resonator to an external circuit, whereby the dielectric resonator apparatus, which has no-load Q larger than in the conventional embodiment, can be made smaller in size, and also, can realize three resonators with one apparatus.

TE.sub.101 triple mode dielectric resonator apparatus

An auto-tuned apparatus for a band-pass filter, wherein, the generated reference signals having the given frequency to be set are mixed with signals to be outputted from the band-pass filter when the reference signals have been inputted to the band-pass filter so as to multiply them for outputting the signals of the multiplied results, the signals of the direct current component from the signals of the multiplied results to be outputted are filtered, and the band-pass filter is controlled so that the center frequencies of the band-pass filter may agree with the frequencies of the reference signal in accordance with the signal of the direct current component to be outputted, whereby the center frequency of the band-pass filter can be adjusted automatically to the desired set value with simple circuit construction and precision better than in the conventional embodiment.

Auto-tuned apparatus for band-pass filter

A method of measuring dielectric material constants, which includes steps of forming a dielectric resonator by providing a plurality of coupling terminals for input and output of signals, on a shield case, with a dielectric sample being disposed within the shield case, constituting an oscillation circuit together with the dielectric resonator by connecting a positive feed-back circuit including an amplification circuit, between the signal output coupling means and the signal output coupling means, and measuring variation in an oscillation frequency of the oscillation circuit by heating the dielectric sample through injection of a high frequency power into the particular coupling terminal, so as to obtain a specific material constant of the dielectric sample based on the variation of the oscillation frequency, and, also a measuring device employed for effecting the measuring method.

Method of measuring dielectric material constants and measuring device

This dielectric resonator comprises a cylindrical hollow case made of metal, a cylindrical hollow dielectric resonator element which is fixed and held in the case, and a dielectric tuning unit which is inserted into or withdrawn from a hollow portion of the dielectric resonator element. The hollow portion of the dielectric resonator element is formed by at least one, or a plurality of, cutout portions which extend along respective radii of the cylindrical dielectric resonator. In this dielectric resonator, the overall effective dielectric constant as a whole can be varied by inserting the tuning unit into or withdrawing it from the hollow portion of the dielectric resonator element. When the tuning unit is withdrawn from the hollow portion of the dielectric resonator element, part of an electric field path at the dielectric resonator element is interrupted by the cutout portions.

Dielectric resonator having a cutout portion for receiving an unitary

A radio frequency signal combining/sorting device which includes a plurality of filters, and a duplexer device connected to one side of input/output sides of each of the filters for combining/sorting signals, and is characterized in that there is provided a coupling device formed at the input/output ends of the filter connected side of the duplexer means device, with the filters being formed, at their side connected to the duplexer device, with openings for receiving the coupling device.

Radio frequency signal combining/sorting device

A dielectric resonator comprises a shield electrode defining a resonant space and cylindrical dielectric resonator element disposed and supported fixedly in the resonant space, to which an input and output are coupled. Into the hollow portion of the dielectric resonator element, a tuning unit made of a dielectric material is inserted so as to be displaceable in an axial direction therein. The tuning unit is coupled to a supporting axis which is displaceable axially, thus causing the tuning unit to displace in that direction. A resonance frequency of the dielectric resonator varies as the tuning unit displaces.

Dielectric resonator

A dielectric resonator is disclosed which includes a case having a resonator main body portion, an upper lid and a lower lid. Inside the case is a cylindrical dielectric material. The case is formed of a dielectric material having the same coefficient of linear expansion as the cylindrical dielectric material. In one embodiment, main body portion comprises a dielectric case side portion with the cylindrical dielectric material disposed concentrically in a concavity defined by the case side portion, with the cylindrical dielectric material being integrally coupled to the dielectric case side portion by four connecting portions. More specifically, in this embodiment, the case side portion of the main body portion and the cylindrical portion are simultaneously and integrally formed of the same dielectric material. A conductive film is formed to enclose a region surrounding the cylindrical dielectric material. In one embodiment, the conductive film is formed on the whole outer surface of the dielectric case side portion and conductive films and are also formed on the lower surface of the upper lid and the upper surface of the lower lid.

Dielectric resonator comprising a resonant dielectric pillar mounted in

A dielectric resonator device which includes dielectric resonators constituted by a rectangular cavity shield casing and a composite dielectric structure formed by three dielectric members intersecting at right angles with each other to be combined into one unit and disposed in the rectangular cavity shield casing to provide three resonances by TM.sub.110 modes or modified modes thereof which are utilized by the dielectric resonators, and an external coupling device for coupling the dielectric resonators with external circuits.

Dielectric resonator device

A dielectric resonator employing TM.sub.010 mode or its variation mode, and including a cavity resonator and a columnar inner dielectric member accommodated within the cavity resonator a region being formed at an end face of the inner dielectric member so as not to contact the cavity resonator, and a resonant frequency adjusting member being adapted to be movable toward or away from the region, thus adjusting the resonant frequency through variation of a capacitance value in a path passing through the columnar dielectric member, the resonant frequency adjusting member, and the cavity resonator.

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Nagaokakyo, Japan

Hidekazu Wada