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6909344 |
Band switchable filter
A ferro-electric filter and method of tuning same. The filter includes a switch for switching between quarter wave resonator and half wave resonator modes. The filter also includes a ferro-electric...
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6909343 |
Resonator, filter, oscillator, duplexer, and communication apparatus
A resonator, a filter, an oscillator, a duplexer, and a communication apparatus employing these devices have improved efficiency characteristics in confining an electromagnetic field in an opening...
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6903627 |
Dielectric resonator, filter, duplexer and communication device
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...
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6900150 |
Ceramic composition and method
A ceramic material suitable for use as a microwave band filter for telecommunications equipment comprises oxides of titanium, barium, neodymium, samarium, and optionally, bismuth, and containing,...
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6897741 |
Dielectric duplexer and communication apparatus having filter with different degrees of multiplexing
A small dielectric duplexer using a small TM mode dielectric resonator having a low loss is formed. On the transmission side thereof, TM double mode dielectric resonators and a TM triple mode...
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6894587 |
Coaxial resonator, filter, duplexer, and communication device
A coaxial resonator according to an embodiment of the invention includes a tubular dielectric block, an inner conductor having a thin-film, multi-layer electrode structure, which is formed on an...
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6895262 |
High temperature superconducting spiral snake structures and methods for high Q, reduced intermodulation structures
Novel structures and methods for forming useful high temperature superconducting devices, most particularly resonators, are provided. Structures resulting in reduced peak current densities relative...
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6894589 |
Radio frequency resonator and method for producing the same
A dished head and a wall part are integrally formed in one body by spinning, using a flat aluminum based material, and then a corrosion-proof protective coating is formed on the whole surface by...
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6891452 |
High-frequency circuit device and transmitter/receiver
A high-frequency circuit device includes a dielectric substrate. A planar conductor is provided on each of top and bottom surfaces of the dielectric substrate and a slot line is formed on the top...
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6891267 |
Semiconductor switching circuit device
A semiconductor switching circuit device includes a field effect transistor having a source electrode, a gate electrode and a drain electrode, a first electrode pad connected to the source...
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6888425 |
Resonator, filter, composite filter, transmitting and receiving apparatus, and communication apparatus
A microstrip resonator including a dielectric substrate, a resonance electrode on a first main surface of the dielectric substrate, and a ground electrode over an entire second main surface of the...
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6888426 |
Resonator, filter, duplexer, and high-frequency circuit apparatus
In a resonator having a dielectric member and an electrode formed on the dielectric member, a displacement area (D area) having a high vertical electric field component, and a short or steady area...
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6882252 |
Multi-layer microwave resonator
A multi-layer microwave resonator ( 10 ) comprises a cavity ( 12 ) having an inner surface formed from an electrically conductive material. Pieces ( 16 a -16 e ) of dielectric materials stacked on...
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6879219 |
High frequency oscillator with vertical resonator
A high frequency oscillator includes a dielectric, cylindrical resonator (DR) as a frequency-determining element. The dielectric resonator (DR) is arranged vertically on a substrate (S) on its...
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6876278 |
Tunable resonant cavity
A tunable resonant system ( 100 ) and a method for a varying the resonant characteristics of a resonant cavity ( 102 ). The resonant cavity ( 102 ) is enclosed by a conductive material that has at...
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6873222 |
Modified conductor loaded cavity resonator with improved spurious performance
A microwave cavity has a cut resonator therein that is conductor-loaded. Filters made from one or more cavities having cut resonators therein have improved spurious performance over previous...
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6867663 |
Dielectric duplexer
The present invention provides a dielectric duplexer 10 comprising a receiving filter 1 and a transmitting filter 2 which are connected in parallel with an antenna connecting terminal portion...
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6864762 |
Bandpass filter and apparatus using same
A bandpass filter disposed on a substrate includes one pair of ring Each of the ring resonators includes a pattern inductor, a resonance capacitor connected in parallel with the pattern inductor,...
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6853271 |
Triple-mode mono-block filter assembly
The present invention incorporates triple-mode, mono-block resonators that are smaller and less costly. The size reduction has two sources. First, the triple-mode mono-block resonator has three...
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6847274 |
Multilayer coaxial structures and resonator formed therefrom
The idea of the invention is to fabricate a multilayer coaxial transmission line into a printed circuit. The outermost conductor is fabricated by conductive conduit strips in different layers,...
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6844797 |
High-frequency dielectric ceramic member, dielectric resonator, dielectric filter, dielectric duplexer, and communication device
A high-frequency dielectric ceramic member is composed of an oxide ceramic containing Mg, Ba, Re, Ti, and O, wherein Re is at least one element selected from the group consisting of La, Ce, Pr, Nd,...
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6838948 |
Oscillation apparatus and communication apparatus using the same
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...
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6835681 |
Dielectric ceramic composition and dielectric device
A dielectric ceramic composition containing a first component and a second component (25 to 80 wt %) is used. The first component is a complex oxide represented by Formula: xZrO 2 -yTiO 2 -zL...
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6836198 |
Adjustable capacitive coupling structure
A cavity filter which provides for fine tuning of the bandwidth of the filter. The filter provides for both capacitive cross-coupling and inductive coupling between physically adjacent but...
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6833776 |
Dielectric resonator, dielectric filter, dielectric duplexer, and communication device
A dielectric resonator includes a high-frequency dielectric ceramic containing a first ceramic having an adhesive strength of 70 newtons or more per 2 millimeter square to metallic coatings and a...
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6833773 |
Dielectric filter, dielectric duplexer, and communication apparatus incorporating the same
A dielectric filter and a dielectric duplexer have structures for coupling between resonators, in which a range for determining the coupling strength between the resonators can be broadened and the...
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6828882 |
Multi-spiral element, resonator, filter, duplexer, and high-frequency circuit device
A multi-spiral element includes a group of spiral conductive lines arranged so as not to cross each other so that the spiral conductive lines are substantially rotationally symmetric with respect...
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6828790 |
Magnetic resonance apparatus with excitation antennae system
A magnetic resonance imaging system comprises an excitation antennae system ( 13,16 ) including several antennae for emitting an RF-excitation field [B 1 (t)]. An activation control unit (ACU) is...
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6828867 |
Slot electrode dielectric resonator, inductor, capacitor, dielectric filter, oscillator, and communication device
A dielectric resonator includes a slot line constructed by providing a slot electrode having a spiral slot at either an external face of a dielectric layer or inside the dielectric layer and a...
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6825741 |
Planar filters having periodic electromagnetic bandgap substrates
The concept of electromagnetic bandgaps (EBG) is used to develop a high quality filter that can be integrated monolithically with other components due to a reduced height, planar design. Coupling...
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6825734 |
Oscillator module incorporating spiral looped-stub resonator
A transmission line configured as a looped-stub resonator is disclosed, which can be used as a frequency selective element for an oscillator, such as a VCO of a phase locked loop. The transmission...
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6825742 |
Apparatus and methods for split-feed coupled-ring resonator-pair elliptic-function filters
A filter has coupled pairs of resonators positioned between and planar to split feed lines. The filters are further positioned orthogonal to the signal path. The filter has two pairs of resonators....
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6822539 |
Dielectric resonance device with stabilized electric performance
The dielectric resonance device according to the present invention is constructed such that there are provided a column-shaped dielectric resonator and a column-shaped pedestal bonded to the...
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6816038 |
Magnetostatic wave device and disturbance wave eliminator
A YIG film formed on a GGG substrate is separated by a stepwise groove for preparing YIG films having different intervals between end surfaces, and two YIG films resonating magnetostatic waves...
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6816042 |
Process to make lightweight objects
An “inside out” process is used to make RF antennas and components or higher frequency components and/or optics. An electroformed single or multi layer of metal, such as copper, is applied to a...
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6816037 |
Helical filters and methods for specifying assembly thereof
A high frequency filter kit in which resonating first and second electrical circuits are enclosed between proximal and distal ends of a filter case. Partitioning the inside of the enclosed resonant...
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6809612 |
Dielectric block signal filters with cost-effective conductive coatings
A cost-effective communication filter is prepared by etching the surfaces of a shaped and fired ceramic core, applying an electroless nickel solution to create a nickel layer of limited thickness,...
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6806710 |
Magnetic resonance antenna
A magnetic resonance antenna has at least five antenna elements, each of, which extends essentially radially from an inner element beginning to at least one outer element end with respect to a...
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6803835 |
Integrated filter balun
A component that includes a first structure that is integrated with a second structure. The first structure is a lumped balanced to unbalanced circuit (balun) and the second structure is a...
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6803132 |
Temperature stabilization of dielectric resonator
A dielectric resonator having a first layer of alumina and a second layer of TiO 2 is disclosed which has a superior combination of properties such as low dielectric loss, low temperature...
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6800577 |
MICROWAVE DIELECTRIC CERAMIC COMPOSITION OF THE FORMULA XMO-YLA2O3-ZTIO2 (M&equals SR, CA; X:Y:Z&equals 1:2:4, 2:2:5, 1:2:5 OR 1:4:9), METHOD OF MANUFACTURE THEREOF AND DEVICES COMPRISING THE SAME
A microwave dielectric ceramic composition comprises a composition of the formula xMO-yLa 2 O 3 -zTiO 2 wherein M is selected from Sr and Ca and x:y:z=1:2:4, 2:2:5, 1:2:5, 1:4:9.
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6800503 |
MEMS encapsulated structure and method of making same
A method of fabricating an encapsulated micro electro-mechanical system (MEMS) and making of same that includes forming a dielectric layer, patterning an upper surface of the dielectric layer to...
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6801105 |
Resonator of radio-frequency filter
The invention relates to a dielectric double-mode resonator of a radio-frequency filter that comprises a block structure comprising at least two resonator structures having at least one resonance...
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6798319 |
High-frequency filter
A high-frequency filter for use in a superhigh frequency band such as of microwaves and millimeter waves has a substrate, a metal conductor disposed on a first main surface of the substrate, a...
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6798320 |
Microstrip line having a line electrode with integral edge electrodes
A microstrip line includes a strip conductor, a line electrode, and edge electrodes provided at the edges on both sides of the line electrode. The construction of the microstrip line greatly...
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6792299 |
Device approximating a shunt capacitor for strip-line-type circuits
A closed conductive loop for use in planar circuits to realize shunt capacitors instead of conductive patches is disclosed. The closed conductive loop may be formed on a planar substrate or extend...
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6791432 |
Left handed composite media
Composite media having simultaneous negative effective permittivity and permeability over a common band of frequencies. A composite media of the invention combines media, which are either...
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6788164 |
Complex high frequency components
The present invention comprises baluns 2 a , 2 b which convert balanced line signals and unbalanced line signals mutually, and filters 3 a , 3 b which are electrically connected to the baluns ...
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6784768 |
Method and apparatus for coupling energy to/from dielectric resonators
The invention is a method and apparatus for coupling energy into or out of a dielectric resonator circuit by means of a coupling loop. More particularly, the invention is a method and apparatus for...
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6781476 |
Filter having directional coupler and communication device
An inner conductor comprising high impedance portions and low impedance portions alternately connected to each other is disposed in the center of an outer conductor having a substantially square...
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