Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8183960 | Trimming of waveguide filters A waveguide filter comprising a matching means for matching the filter. The waveguide filter comprises a housing comprising a cavity having a predetermined first volume. The matching means is in the form of a volume element having a predetermined second volume being... | 05/22/2012 |
| 8149074 | Tuning element and tunable resonator A resonator is provided with a tuning element based on piezoelectricity. The piezoelectric basic element includes at least one piezoelectric layer and a metal layer. Such a basic element is first coated with a thin insulating layer and then with a good conductor. Th... | 04/03/2012 |
| 8147194 | Turbine engine components A turbine engine component includes a shaft and two sets of hollow radial plates. The shaft includes an axial section forming a portion of a main passage having a substantially uniform diameter. The axial section has two ends and a center located substantially halfw... | 04/03/2012 |
| 8143972 | Resonator and filter The present invention provides a resonator and a filter that reduce the resonator radiation loss so as to achieve a high Q value that is inherent to a low-loss material while maintaining high power handling capability. In this manner, both high power handling capabi... | 03/27/2012 |
| 8130063 | Waveguide filter A waveguide bandpass filter for use in microwave and millimeter-wave satellite communications equipment is presented. The filter is based on a substrate integrated waveguide (SIW) having several cascaded oversized SIW cavities. The filter is implemented in a printed... | 03/06/2012 |
| 8130059 | On chip slow-wave structure, method of manufacture and design structure An on-chip slow-wave structure that uses multiple parallel signal paths with grounded capacitance structures, method of manufacturing and design structure thereof is provided. The slow wave structure includes a plurality of conductor signal paths arranged in a subst... | 03/06/2012 |
| 8120447 | Multilayer balanced filter A multilayer balanced filter includes a first coil including a first straight line electrode and via electrodes. A first capacitor, a second capacitor, and a third capacitor are provided respectively between a ground electrode and a first capacitor electrode, betwee... | 02/21/2012 |
| 8115569 | Monoblock dielectric multiplexer capable of processing multi-band signals Disclosed herein is a monoblock dielectric multiplexer capable of processing multi-band signals. The monoblock dielectric multiplexer includes a dielectric block implemented as a hexahedral dielectric forming a body of the monoblock dielectric multiplexer. An extern... | 02/14/2012 |
| 8111115 | Method of operation and construction of dual-mode filters, dual band filters, and diplexer/multiplexer devices using half cut dielectric resonators Novel quadruple-mode, dual-mode, and dual-band filters as well multiplexers are presented. A cylindrical dielectric resonator sized appropriately in terms of its diameter D and length L will operate as a quadruple-mode resonator, offering significant size reduction ... | 02/07/2012 |
| 8106728 | Circuit structure and design structure for an optionally switchable on-chip slow wave transmission line band-stop filter and a method of manufacture The present invention generally relates to a circuit structure, design structure and method of manufacturing a circuit, and more specifically to a circuit structure and design structure for an on-chip slow wave transmission line band-stop filter and a method of manu... | 01/31/2012 |
| 8102222 | Passive part A first passive part forms a second parallel resonance circuit having a resonance frequency near the passing band among a first to a third parallel resonance circuit as follows. That is, the second parallel resonance circuit is formed at a position farthest from a f... | 01/24/2012 |
| 8100667 | Turbomachinery disc A turbomachinery disc, (e.g. a fan) has a primary axis of rotation and an axial flow direction X parallel to the primary axis of rotation. The disc has an annular diaphragm extending from proximate a blade land to a free inner radius. The diaphragm is asymmetrical a... | 01/24/2012 |
| 8093963 | Laminated bandpass filter, high-frequency component and communications apparatus comprising them A three-stage-resonator, laminated bandpass filter comprising electromagnetically coupled first to third resonator electrodes, adjacent first and second resonator electrodes and a third resonator electrode being different in a grounding direction, and a coupling-cap... | 01/10/2012 |
| 8085118 | Inline cross-coupled coaxial cavity filter An inline microwave bandpass filter where cross coupling between non-adjacent resonators is realized by changing the orientation of selected resonators. The microwave bandpass filter includes a cavity and three or more resonators arranged in a row (or inline) in the... | 12/27/2011 |
| 8072298 | Radio frequency filter A radio frequency filter comprising: housing body having input/output connectors and containing space which is divided into spaces by means of diaphragm; at least one resonator rod arranged in the housing; housing cover coupled to the housing body; wherein the housi... | 12/06/2011 |
| 8063724 | Self-matching band-pass filter and related frequency down converter A band-pass filter includes an input port, an output port, and a plurality of resonators. The input port is utilized for receiving a radio frequency signal. The output port is utilized for outputting a filtered signal. The plurality of resonators are placed between ... | 11/22/2011 |
| 8063723 | Filter apparatus and method A filter includes a cross-coupling link which includes a crossbar, a first vertical support attached to one end of the crossbar, a second vertical support attached to another end of the crossbar, a first coupling arm attached to the first vertical support, a second ... | 11/22/2011 |
| 8056227 | Turbine blade having material block and related method A turbine blade including a root section at an end of the turbine blade, a first airfoil section adjacent to the root section, and a tip section adjacent to the airfoil section and including a material block that is incongruous with the airfoil section. A midspan se... | 11/15/2011 |
| 8049578 | Air loaded stripline Air loaded stripline assemblies and methods for providing same are disclosed. The air loaded stripline assembly includes circuit board layers interconnected to one another. A layer containing a conductive trace forming a stripline is connected to spacer layers. The ... | 11/01/2011 |
| 8040203 | Filter circuit and radio communication device The present invention provides a filter circuit that can achieve both sharp bandpass characteristics and high power handling capability. The filter circuit includes: an input terminal that has a signal input; a four-port device that divides input signals; a band sto... | 10/18/2011 |
| 8035465 | Cavity resonator, use of a cavity resonator and oscillator circuit A cavity resonator having temperature compensation which comprises a pot and a cover, which together enclose a cavity resonance volume. The pot comprises a first material, which has a first temperature expansion coefficient and the cover comprises a second material,... | 10/11/2011 |
| 8031035 | Circuit configuration A ceramic multilayer construction includes three resonators designed as parallel strip lines that are capacitatively or magnetically coupled to each other. All circuit components are implemented in the form of metallizations in multilayer construction. Capacitative ... | 10/04/2011 |
| 8026778 | LC composite component An LC composite component capable of reducing an overall size while keeping a Q-value of a resonator at a high level and increasing coupling flexibility of resonators includes two capacitor electrodes and two input/output terminal electrodes extending therefrom prov... | 09/27/2011 |
| 8022790 | Composite right/left-handed line device A composite right/left-handed line device includes plural electrodes, plural dielectric substances and plural magnetic substances. The plurality of electrodes each include a pair of electrode plates, and a connection piece connected to the pair of electrode plates. ... | 09/20/2011 |
| 8018306 | Resonator having a three dimensional defected ground structure in transmission line A high quality resonator has a three dimensional Defected Ground Structure (DGS) in the transmission line. The resonator includes a substrate installed at the center of the resonator floating in the air through supporting members, a transmission line on the substrat... | 09/13/2011 |
| 8018299 | Band-pass filter circuit and multi-layer structure and method thereof A band-pass filter includes a plurality of resonators, a feedback capacitive device and a grounding inductance device. A first end of each resonator is connected to a first node, and a second end of each resonator is connected to a second node. The feedback capaciti... | 09/13/2011 |
| 8008994 | Tunable capacitive input coupling Various exemplary embodiments include a cavity having a tuning assembly with tunable capacitive coupling. The tuning assembly may have a recess having a specified depth, designed for a default magnitude of coupling into the cavity. A sleeve may be fully inserted wit... | 08/30/2011 |
| 7994875 | Tri-frequency duplexer circuit and multi-frequency duplexer circuit The present invention discloses a tri-frequency duplexer circuit and multi-frequency duplexer circuit. The tri-frequency duplexer circuit comprises a microstrip line circuit, two first mushrooms, two second mushrooms and two third mushrooms. The microstrip line circ... | 08/09/2011 |
| 7986199 | Band pass filter A band pass filter is suitable to be formed in a multi-layered circuit substrate of a wireless communication module. The band pass filter includes an input port, a first inductor, a first capacitor, a first parasitic capacitor, a second capacitor, a second inductor,... | 07/26/2011 |
| 7971756 | Filtering device and related wireless communication receiver A filtering device includes an isolation substrate including a first plane and a second plane, a micro-strip line deposited on the first plane of the isolation substrate for transmitting signals, and a ground metal layer deposited on the second plane of the isolatio... | 07/05/2011 |
| 7969260 | Variable radio frequency band filter A variable radio frequency band filter includes a housing with a plurality of cavities, a plurality of resonators, wherein one resonator is arranged in each cavity, and a tuning arrangement having a plurality of tuning structures. One of the tuning structures is arr... | 06/28/2011 |
| 7944328 | Low-pass filter A low-pass filter includes a first curved microstrip, a second curved microstrip, a first flat microstrip, a second flat microstrip, and a third flat microstrip. The first curved microstrip is in an n-shape and defines a first receiving space therein. The second cur... | 05/17/2011 |
| 7898361 | Antenna feed copling structure of a duplexer An antenna feed coupling structure of a duplexer is disclosed to include a base defining a detoured resonance cavity and a T-shaped feed-in cavity perpendicularly intersecting the resonance cavity and a signal input port in connection with the head of the feed-in ca... | 03/01/2011 |
| 7724514 | Server chassis with access flap A server chassis includes a base defining an opening, a rotating plate, a sliding plate, and first and second elastic members. The base includes a middle plate opposite to the opening and defines a space communicating with the opening. The rotating plate defines a p... | 05/25/2010 |
| 7604332 | Liquid ejection head and image forming apparatus comprising same The liquid ejection head includes: a casing; nozzles which eject droplets of liquid containing a volatile solvent and are arranged on a nozzle face in the casing; an air outlet which supplies an air flow containing a vapor of the volatile solvent and is arranged on ... | 10/20/2009 |
| 7561011 | Dielectric device 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 fir... | 07/14/2009 |
| 7558496 | Image forming device A developer agitation screw is provided with a blade to gather developer onto the sensor surface of a toner concentration sensor. A toner concentration control unit detects the maximum value of the output of the toner concentration sensor within each predetermined p... | 07/07/2009 |
| 7535428 | Flat-aperture waveguide sidewall-emitting twist-reflector antenna A flat aperture waveguide sidewall-emitting twist-reflector (FAWSET) antenna, having an E-plane sectoral flare having a depth merely the H-plane width of the waveguide. Extending the E-plane sectoral flare is a twist-reflector tilted from one sidewall of the E-plane... | 05/19/2009 |
| 7518463 | Circuit assembly with conical inductor A circuit assembly has a conical inductor disposed in a slot formed in a substrate. ... | 04/14/2009 |
| 7495532 | Systems and methods for blocking microwave propagation in parallel plate structures Systems and methods are taught for blocking the propagation of electromagnetic waves in parallel-plate waveguide (PPW) structures. Periodic arrays of resonant vias are used to create broadband high frequency stop bands in the PPW, while permitting DC and low frequen... | 02/24/2009 |
