Murata Manufacturing Co., Ltd.

Hiroki Wakamatsu

Tomoyuki Ise

Kenji Saito

Hiroyuki Kubo

Shin Abe

Jun Hattori

Shinichi Kenzaki

Yukihiro Kitaichi

Takashi Maruyama

Taiyo Nishiyama

Yuichi Maruyama

Yoshihiro Himi

Yukihiro Nakatani

Kazuhiko Kubota

Hajime Suemasa

Yoshihiro Osaki

Nobushige Araki

A coaxial connector plug and a coaxial connector receptacle that may be stably suctioned by a suction nozzle. A coaxial connector receptacle including a substantially cylindrical outer conductor and a center conductor surrounded by the outer conductor is mountable to a coaxial connector plug. An outer conductor has a substantially cylindrical shape extending in the z-axis direction, and is provided with a slit that connects between the upper end and the lower end of the outer conductor. A center conductor is surrounded by the outer conductor. A projection is positioned in the slit. The outer conductor of the coaxial connector receptacle is inserted into the outer conductor from the negative side in the z-axis direction. The center conductor of the coaxial connector receptacle is connected to the center conductor.

Coaxial connector plug and coaxial connector receptacle

An outer conductor has a substantially cylindrical shape extending in an axial direction. A center conductor has a substantially cylindrical shape extending in the axial direction, and is provided inside the outer conductor. An insulator fixes the center conductor relative to the outer conductor. The center conductor is provided with a hole that communicates with the inside and the outside of the center conductor. The insulator extends, via the hole, to the inside of the center conductor from the outside.

Coaxial connector plug

An outer conductor portion includes an outer conductor and a pair of outer terminals. The outer conductor is formed into a substantially cylindrical shape extending in the z-axis direction. The outer terminals are drawn toward the positive z-axis direction side of the outer conductor. In a plan view in the z-axis direction, the outer terminals are each bent in a direction outwardly from the outer conductor, and face each other across the outer conductor. An insulator has two sides, an upper surface in contact with a positive z-axis direction-side end portion of the outer conductor, and a lower surface in contact with the outer terminals at the sides, and thereby is nipped by the outer conductor portion in the z-axis direction. A central conductor is attached to the insulator, and is provided in a region surrounded by the outer conductor.

Coaxial connector plug and manufacturing method thereof

An electrical contact component includes a base defining an external terminal to be mounted on a surface of a wiring board with a solder and a fitting portion having a substantially tubular shaped fitting periphery. The external terminal has a first principal surface opposing the surface of the wiring board, a second principal surface substantially parallel to the first principal surface, and sides substantially perpendicular to the first and second principal surfaces and connecting the first principal surface to the second principal surface. The fitting portion is continuously provided on the second principal surface. The fitting periphery of the fitting portion is electrically connected to the second principal surface and the sides of the external terminal by metal layers formed over their respective surfaces. The metal layer contains Ni as a principal constituent and Co, and the metal layer contains Au as a principal constituent.

Electrical contact component, coaxial connector, and electrical circuit device including the same

A coaxial connector is connected to a leading end of a coaxial cable and is detachably connected to a receptacle. The coaxial connector includes a cylindrical housing including a spring portion having a projection to be fitted in a groove provided on the outer periphery of an outer conductor of the receptacle, a central conductor probe stored in the housing so as to be in contact with an inner terminal of the receptacle, and cylindrical sleeves held on the outer periphery of the housing so as to be movable in the axial direction. The sleeve has lock pieces provided in an upper portion and an annular portion in a lower portion. The lock pieces are in elastic contact with a first engaging portion and a second engaging portion provided on the outer periphery of the housing. The annular portion restricts expansion of the spring portion of the housing. The annular portion of the sleeve does not restrict the spring portion when detached (position A), and restricts expansion of the spring portion when attached (position B).

Coaxial connector and measuring coaxial probe

The present invention provides a dielectric resonator having increased reliability with respect to thermal cycle fatigue of a joint between a conductive cavity and a dielectric core disposed in the cavity without an increase in material cost and processing cost, a filter and duplexer each using the dielectric resonator, and a communication device including these devices. The dielectric resonator has a structure in which the dielectric core is provided in the cavity through earth plates. Each of the earth plates has slits provided at positions in contact with the four corners of each of two opposing side faces of the dielectric core. Of the four sides of each of the earth plates, the two sides provided with spring portions are preferably inclined so that the distance between the two sides decreases toward the bottom of the cavity, and concave portions are formed in the inner surface of the cavity corresponding to the two inclined sides. Therefore, solder cream can be previously applied to predetermined positions of the concave portions of the cavity.

Dielectric resonator, filter, duplexer and communication device

A multi-mode resonator device can be reduced in size even while increasing the number of resonators while including either a semi-coaxial resonator or a coaxial resonator. Coupling between a TEM mode as a resonance mode of the semi-coaxial resonator and a TM mode as another resonance mode can be facilitated, which enables coupling between the resonators at a predetermined coupling strength. Inside a cavity with a cover, a conductive rod and a dielectric core are disposed so as to substantially equalize a quasi-TEM-mode resonant frequency generated by the cavity and the conductive rod and a quasi-TM-mode resonant frequency generated by the cavity and the dielectric core. A coupling adjusting block is arranged at a place where the magnetic field of one of two coupling modes generated by the quasi-TEM and quasi-TM modes is strong and that of the other mode is weak. The invention also provides a filter, duplexer, and a communication apparatus using the resonator device.

Resonator device, filter, duplexer, and communication apparatus using the same

A dual-mode resonator including a conductive cavity that houses a conductive bar and a dielectric core through which the conductive bar is inserted duplexes and couples a TEM mode generated by the cavity and the conductive bar, and a TM mode generated by the cavity and the dielectric core. A TEM single-mode resonator is formed of a cavity body and a conductive bar. The dual-mode resonator and the TEM single-mode resonator form a filter apparatus.

Filter apparatus, duplexer, and communication apparatus

A dielectric filter in which a desirable amount of coupling is obtainable, and the positions of an input coupling unit and an output coupling unit can be easily arranged. The dielectric filter includes a shield case, a dielectric resonator disposed inside the shield case, a supporting base for supporting the dielectric resonator, the input coupling unit, and the output coupling unit. Both the input coupling unit and the output coupling unit are coupled to the dielectric resonator. The output coupling unit is a probe with an open-circuited end, extending on a side where the supporting base of the dielectric resonator is disposed.

Dielectric filter, duplexer, and communication apparatus

In a cavity body, a conductor rod is provided with least one end thereof being electrically connected to the cavity. A dielectric core is disposed in the cavity and the conductor rod extends through a hole in the dielectric core. With this structure, the cavity and the conductor rod constitute a resonator which operates in the quasi-TEM mode of a re-entrant cylindrical cavity resonator. The cavity and the dielectric core constitute a resonator which operates in the quasi-TM mode.

Resonator device, filter, composite filter device, duplexer, and communication device

A multimode dielectric resonator apparatus is configured such that a TM mode and a TE mode are transformed into multiplex modes, coupling between individual resonant modes can be easily made, and a large number of sequentially coupled stages can be obtained with a single dielectric core. In the multimode dielectric resonator apparatus, a dielectric core is configured of a plate-like TM-mode dielectric core portion and a TE-mode dielectric core portion protruding therefrom in the vertical direction, for example in a spherical shape. Five modes, namely a TMx mode, a TMy mode, a TEx mode, a TEy mode, and a TEz mode are used as multiplex modes. In addition, a filter and a duplexer use the multimode dielectric resonator apparatus, and a communication apparatus uses one or both of the filter and the duplexer.

Multimode dielectric resonator apparatus, filter, duplexer, and communication apparatus

A dielectric resonator includes a cavity member formed of an electrically conductive material and a dielectric core disposed in the cavity member. The resistance against heat cycle fatigue in bonding portions between the dielectric core and the cavity member is enhanced without causing increases in material cost and production cost. An electrode is formed on each end face of the dielectric case, or on the end face of each flange portion of the dielectric core. A metal foil having a cover portion for covering each end face, and having a spring portion which may be bent along the outer edge of the flange portion is connected to the dielectric core by bonding the cover portion of the metal foil to the end face using an electrically conductive adhesive. Thereafter, the spring portion of the metal foil is soldered to the inner surface of the cavity wall. The metal foil has a portion raised toward the inner surface of the cavity wall, and the inside of the raised portion is filled with an adhesive. A filter, a duplexer, and an communication device are also formed using the above-described dielectric resonator.

Dielectric resonator, filter, duplexer, and communication device

A multimode dielectric resonator apparatus is configured such that a TM mode and a TE mode are transformed into multiplex modes, coupling between individual resonant modes can be easily made, and a large number of sequentially coupled stages for a single dielectric core can be obtained. A dielectric core is configured of a plate-like TM-mode dielectric core portion and a TE-mode dielectric core portion protruding therefrom asymmetrically in the upper and lower directions. By this asymmetry of the TE-mode dielectric core portion with respect to the TM-mode dielectric core portion, for example, a TMx mode and a TEz mode may be coupled together, and concurrently, a TMy mode and a TEz mode may be coupled together.

Multimode dielectric resonator apparatus, filter, duplexer and communication apparatus

A filter includes a dielectric resonator, a cavity for holding the dielectric resonator therein, an external connector mounted on the cavity, and a coupling loop connected to the external connector so as to electromagnetically couple with the dielectric resonator. The coupling loop is formed by bending a metal plate nearly into the shape of an L, and is provided with a rib extending in a direction that is not parallel to the bending line.

Filter, duplexer, and communication device

A long-life highly reliable dielectric resonator, a dielectric filter using the dielectric resonator and a dielectric duplexer, in which the heat accumulated in concave portions is dissipated. The dielectric resonator comprises a frame, a column-shaped dielectric resonant element disposed so as to be integral with the frame at ends thereof, the concave portions formed from the external surface of the frame into the dielectric resonant element in the direction of the axis of the dielectric resonant element, a conductor formed on the overall outer surface of the frame including inside the concave portions, and thermal-conducting means inserted in the concave portions.

Growing community of inventors

Kyoto, Japan

Hiroki Wakamatsu