Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 8188813 | Circuit board microwave filters A microwave filter having a resonator comprising a cylindrical structure having conductive walls filled with a conductor material. The cylindrical structure is recessed inside a multi-layered substrate. First and second conductive coupling arms are disposed on the t... | 05/29/2012 |
| 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 |
| 8159314 | Actively tuned filter An actively tuned filter providing a constant bandwidth at a plurality of frequencies. The filter includes first and second electromagnetically coupled coiled resonators, each resonator having an open end configured to receive an input and a shorted end configured t... | 04/17/2012 |
| 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 |
| 8077000 | Electromagnetic bandgap structure and printed circuit board Disclosed are an electromagnetic bandgap structure and a printed circuit board. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure can include a dielectric layer; a plurality of conductive plates; a stitching via, config... | 12/13/2011 |
| 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 |
| 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 |
| 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 |
| 7994879 | Apparatus for transitioning millimeter wave between dielectric waveguide and transmission line Provided is an apparatus for transitioning a millimeter wave between dielectric waveguide and transmission line using a millimeter wave transition structure formed by the dielectric waveguide, the transmission line, and a slot to transition a signal with lower losse... | 08/09/2011 |
| 7956707 | Angled metallic ridge for coupling combline and ceramic resonators An apparatus for coupling a combline resonator and a ceramic resonator, including one or more of the following: a housing; a combline resonator in the housing; a ceramic resonator in the housing, the ceramic resonator having a stem portion and a mushroom portion; a ... | 06/07/2011 |
| 7956706 | Multiband filter having comb-line and ceramic resonators with different pass-bands propagating in different modes A multiband filtering apparatus (40) for use in a communications system, said apparatus including a housing (21); a plurality of cavities (22.1, 22.2) disposed within said housing wherein each cavity includes a resonant structure, the resonant s... | 06/07/2011 |
| 7952452 | Filter with multiple in-line shunt zeros A filter including at least two resonator through-holes defining apertures in the top surface surrounded by respective plates which in combination with associated through-holes define primary and secondary shunt zeros providing low ripple and high rejection adjacent... | 05/31/2011 |
| 7944330 | Resonant element and high frequency filter, and wireless communication apparatus equipped with the resonant element or the high frequency filter A resonant element that causes a signal input from an input terminal to resonate at a predetermined resonance frequency and outputs it to an output terminal is provided. The element has a transmission line series including a plurality of transmission lines connected... | 05/17/2011 |
| 7915977 | Tuneable bandpass filter A tuneable bandpass filter includes a plurality of coupled resonators. A common structure of the filter includes at least one common coupling or one common resonator. An upper loop includes first and second end resonators coupled together by a signal path and furthe... | 03/29/2011 |
| 7898367 | Ceramic monoblock filter with metallization pattern providing increased power load handling A ceramic monoblock filter incorporating a top face input/output port metallization pattern defining an input/output transmission line, a power load distribution bar, and a ground plate. The transmission line, power load distribution bar, and ground plate are all po... | 03/01/2011 |
| 7855620 | Filter circuit device having parallel connected resonator groups with cascade connected delay circuits and radio communication device formed therefrom A filter circuit device includes a resonator unit configured with six or more resonators, the resonators being divided into a first resonator group including resonators connected in parallel and having odd-numbered resonance frequencies and a second resonator group ... | 12/21/2010 |
| 7847658 | Light-weight low-thermal-expansion polymer foam for radiofrequency filtering applications An apparatus 100 comprising a radiofrequency filter body housing 102. The radiofrequency filter body housing includes a polymeric composition 110 that includes at least one polymer foam 115 and filler material 120. The filler mater... | 12/07/2010 |
| 7843286 | Dielectric resonator filter having a tunable element eccentrically located and a method of production thereof A high-frequency filter arrangement comprising at least one filter consisting of a plurality of high-frequency inter-coupled cavities in which a locally fixed respective dielectric resonator element is disposed and in which a respective dielectric body can be modifi... | 11/30/2010 |
| 7834721 | System and method for tuning multicavity filters The invention refers to a system and method to tune a multicavity filter of microwave signals, said filter comprising a filter body (CF), a removable lid (CO), n resonant cavities dug out in said filter body (CF) and n tuners (TU) susceptible of displacement under t... | 11/16/2010 |
| 7825751 | Resonant circuit, filter circuit, and antenna device In resonant elements 102 to 105 constituting a resonant circuit, an uncontrolled cross coupling which exists between two resonant elements is controlled by using a coupling element 106 which is newly arranged between the resonant elements, where... | 11/02/2010 |
| 7825752 | Dielectric filter having a dielectric block with input/output electrodes of a bent shape at corner portions of the block A dielectric filter having a dielectric block disposed on a mount board. The dielectric block includes inner conductor holes having open ends on the front surface of the dielectric block. Input/output electrodes are disposed on the undersurface of the dielectric blo... | 11/02/2010 |
| 7808345 | Dielectric resonator of cruciform shape having offset planes and a filter formed there from A dielectric resonator is constructed so as to have a substantially cruciform shape in cross section by including four plate components. A first set of opposed plate components have respective first principal center planes separated from each other and substantially... | 10/05/2010 |
| 7782158 | Passband resonator filter with predistorted quality factor Q A filter for processing an RF signal includes an input port and an output port and a plurality of resonators. The resonators are arranged in a sequentially-coupled arrangement between the input and output ports to affect an RF signal therebetween. Each resonator inc... | 08/24/2010 |
| 7777598 | Dielectric combine cavity filter having ceramic resonator rods suspended by polymer wedge mounting structures A combline filter has a ceramic resonator disposed inside at least one cavity wall. Because the resonator is implemented as a hollow rod, a tuning element may be inserted into an opening on the top of the rod to tune its frequency. A mounting element, inserted into ... | 08/17/2010 |
| 7764146 | Cavity microwave filter assembly with lossy networks A cavity microwave filter assembly for filtering an electromagnetic wave including a plurality of cavity resonator assemblies, where each cavity resonator assembly has a bottom and including at least one lossy element for electromagnetically coupling two elements of... | 07/27/2010 |
| 7760050 | Dielectric filter having tapered input/output electrodes A dielectric filter having inner-conductor holes penetrating through a dielectric block from a first surface to a second surface thereof. An outer conductor and input/output electrodes are formed on an outer surface of the dielectric block. A side of each of the inp... | 07/20/2010 |
| 7755456 | Triple-mode cavity filter having a metallic resonator A triple-mode filter is disclosed, the triple-mode filter including a cavity for confining electromagnetic waves and a metallic block acting as a resonator within that cavity. The metallic block does not contact the conductive walls of the cavity, but is instead sus... | 07/13/2010 |
| 7719391 | Dielectric resonator circuits The invention is a dielectric resonator circuit comprising a housing; first, second, and third resonators positioned substantially in a row within the housing with said second resonator positioned between the first and third resonators, wherein the resonators are po... | 05/18/2010 |
| 7705694 | Rotatable elliptical dielectric resonators and circuits with such dielectric resonators In accordance with principles of the present invention, a two or more pole dielectric resonator circuit is provided with resonators that are elliptical in cross section orthogonal to the longitudinal axis. The resonators are mounted so that they are rotatable about ... | 04/27/2010 |
| 7696845 | Dielectric filter for base station communication equipment In a dielectric filter (1) for base station communication equipment, a rectangular solid dielectric block (2) is provided with a plurality of ΒΌ wavelength resonators (3A1-3A4; 3B1-3B4), which are arrang... | 04/13/2010 |
| 7663454 | Discrete dielectric material cavity resonator and filter having isolated metal contacts A discrete resonator is provided, including a dielectric base having a dielectric constant. A metal contact formed on a major surface of the dielectric base has a predetermined area and is positioned at a predetermined location on the dielectric base to provide a pr... | 02/16/2010 |
| 7583165 | High Q cavity resonators for microelectronics A cavity resonator is provided which includes a shielded enclosure enclosing a volume and a unitary conductor disposed within the volume, the unitary conductor having a first inductor portion and a transmission line portion. The transmission line portion is included... | 09/01/2009 |
| 7583164 | Dielectric resonators with axial gaps and circuits with such dielectric resonators A dielectric resonator with an air (or other dielectric) gap axially interrupting the body of the resonator and circuits employing such resonators. Preferably, the resonator body is conical or a stepped cylinder. However, the invention also is workable with a straig... | 09/01/2009 |
| 7573355 | Integrated bandpass/bandstop coupled line filter An apparatus and method for attenuating selected frequency bands in a microstrip filter having a plurality of microstrip resonators. The filter comprises plural resonators, a first of the plural resonators is operatively connected to a first feed point and a second ... | 08/11/2009 |
| 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 |
| 7557678 | Base body for a YIG filter or YIG oscillator A base element for a YIG band-pass filter or a YIG oscillator is formed from a non-magnetic material and comprises filter chambers, which are formed in the base element, wherein the filter chambers are connected to one another by channels, and YIG elements are dispo... | 07/07/2009 |
| 7545240 | Filter with multiple shunt zeros A filter including at least two resonator through-holes defining apertures in the top surface surrounded by respective plates which in combination with the through-holes associated therewith define primary and secondary shunt zeros adapted to provide low ripple and ... | 06/09/2009 |
| 7538638 | Resonator, filter, and communication unit A resonator, a filter, and a communication apparatus that can be easily miniaturized even if the resonant frequency is relatively low are provided. Conductor layers are laminated in the state in which they are partially insulated from each other by a dielectric laye... | 05/26/2009 |
| 7538639 | Low-pass filter A filter includes an input portion, a low-impedance transmission portion, a high-impedance transmission portion, and an output portion. The input portion receives electromagnetic signals. The high-impedance transmission portion is electrically connected to the input... | 05/26/2009 |
| 7528686 | Tunable filter utilizing a conductive grid A tunable filter includes a first resonator; a second resonator; and, a conductive grid assembly electrically coupled to the first and second resonators and coupled to ground. The conductive grid assembly alters the coupling between the first and second resonators. ... | 05/05/2009 |
