Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7911297 | Filter device and method for manufacturing the same A filter device having a frame made of plated steel sheet generates a smaller insertion loss and is excellent in productivity. Resonant elements are shaped into a cylindrical form by bending the steel sheet, whose both sides are plated, before they are placed in a f... | 03/22/2011 |
| 7847659 | Coaxial metamaterial structure A metamaterial device has a coaxial structure including rotational symmetry about a longitudinal axis of coaxial conductors. In a disclosed example, a series inductance portion has a relatively smaller circumferential dimension compared to another portion of a condu... | 12/07/2010 |
| 7728700 | High frequency filter in a coaxial construction, in particular in the manner of a high frequency separating filter (for example a duplex separating filter) or a bandpass filter or band-stop filter An improved high frequency filter in a coaxial construction with one or a plurality of resonators has a thread pitch or thread pitch angle of an external thread of a thread-like tuning element which differs from the thread pitch or the thread pitch angle of the inte... | 06/01/2010 |
| 7619496 | Monoblock RF resonator/filter having a conductive transmission line connecting regions of conductive material A resonator/filter adapted for direct surface mounting to the surface of a printed circuit board. The resonator/filter comprises a block of dielectric material including at least one resonator through-hole extending therethrough and respective top, bottom and side s... | 11/17/2009 |
| 7612637 | Built-in cross-coupled dielectric filter A stable and reliable built-in cross-coupled dielectric filter with temperature-independent performances and improved rectangular degree and amplitude-frequency characteristic is disclosed. The built-in cross-coupled dielectric filter comprises at least three sequen... | 11/03/2009 |
| 7570136 | Re-entrant resonant cavities, filters including such cavities and method of manufacture A re-entrant microwave resonant cavity comprises a stub 6. A cylindrical wall 2, first end wall 3 and the stub 6 are integrally formed. A second end wall 4 is defined by a metallization layer 8 deposited on a printed circuit... | 08/04/2009 |
| 7489215 | High frequency filter The invention relates to a high frequency filter of coaxial construction, comprising an outer conductor housing with a housing base and a housing wall, whereby several resonators are embodied in the outer conductor housing, each comprising an inner conductor tube, e... | 02/10/2009 |
| 7486162 | High frequency filter An improved high frequency filter of coaxial construction comprises one or more resonators having an electrically conductive internal conductor configured as an internal conductive tube and an electrically conductive external conductor. An electrically conductive ba... | 02/03/2009 |
| 7482897 | Band stop filter A band stop filter comprises a transmission line with center and outer conductors, and coaxial resonators. The outer conductor forming a unitary conductive housing with an inner space divided by conductive partition walls into resonator cavities. Each of the resonat... | 01/27/2009 |
| 7482898 | Dielectric filter, dielectric duplexer, and communication apparatus A dielectric filter with an ultra hetero-axial structure is provided with open end-face electrodes. By increasing the capacitance between each open end-face electrode and an external conductor greater than that generated between the open end-face electrodes adjacent... | 01/27/2009 |
| 7400221 | Semi-coaxial cavity resonator, filter using the same, and communication apparatus using the same In a semi-coaxial cavity resonator in which an inner conductor is fixed to an outer conductor with a screw, an inner cavity where the inner conductor does not engage with the screw is provided to extend from a bearing surface of the inner conductor to a region of an... | 07/15/2008 |
| 7369019 | RF backscatter transmission with zero DC power consumption A method for minimizing power consumption in a wireless device which utilizes backscatter transmission in half-duplex mode, wherein a switching device is interposed between an antenna and a transmitter-receiver, and the switching device is capable of causing the ant... | 05/06/2008 |
| 7359677 | Device and methods for high isolation and interference suppression switch-filter Systems and methods are provided for a stacked die configuration of a high isolation switch and a rejection filter where transmit and receive signals are desired to have a high out-of-band rejection and a low loss band-pass region. In some aspects of the invention t... | 04/15/2008 |
| 7355495 | Microwave filter comprising a coaxial structure with a metallized foam having a periodic profile The invention relates to a microwave filter comprising a coaxial structure, consisting of a tubular outer conductor and an inner bar conductor. According to the invention, the inner bar conductor extends in an axial direction inside the outer tube and, together with... | 04/08/2008 |
| 7348869 | Adjustable coaxial filter device with axially adjustable inner conductor An adjustable filter includes an outer conductor, a first inner conductor, and a second inner conductor. The inner conductors are capacitively coupled on the same axis. The further may further include a third inner conductor capacitively coupled to both the first an... | 03/25/2008 |
| 7348285 | Fabric and yarn structures for improving signal integrity in fabric-based electrical circuits Coaxial and twisted pair conductive yarn structures reduce signal crosstalk between adjacent lines in woven electrical networks. A coaxial conductive yarn structure includes an inner conductive yarn having a plurality of conductive strands twisted together. An outer... | 03/25/2008 |
| 7327210 | Band agile filter A microwave filter and method for remotely tuning a microwave filter from one sub-band to another sub-band using metallic rings to adjust the capacitance or inductance of the resonator. In adjusting the capacitance, a plurality of metallic rings are disposed in the ... | 02/05/2008 |
| 7321278 | Low profile ceramic RF filter including trap resonators and a decoupler A low profile ceramic filter for connection to an antenna, a transmitter and a receiver. The filter filters an incoming signal from the antenna to the receiver and an outgoing signal from the transmitter to the antenna. The filter has a ceramic core with through-hol... | 01/22/2008 |
| 7317398 | Security and identification label and the production and use thereof An object is provided with a label for identifying in a cable-less manner by an electromagnetic radiation. The inventive label comprises at least one antenna receiving an incident electromagnetic signal and characterized reducing the influence of dispersion or stray... | 01/08/2008 |
| 7308749 | Production method for dielectric resonator device A method of forming a dielectric resonator from an inner-conductor-formed hole that has a substantially rectangular or substantially elliptical cross section in a direction perpendicular to the depth direction thereof, by placing a rotary cutting disk in contact wit... | 12/18/2007 |
| 7283017 | Band pass filter Planar band pass filter includes several planar resonators (Ri) arrange parallely, such that the input (R1) and output (R5) planar resonators are connected to input (11) and output (12) feed lines, respectively, and the connections betwee... | 10/16/2007 |
| 7283020 | Signal extracting arrangement A base station in a mobile communication network, includes at least one transmission line for transmitting a radio frequency signal. Each transmission line includes a coupling hole. A two-port coupled line includes one or more coupling holes. Each transmission line ... | 10/16/2007 |
| 7276990 | Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same A switch arrangement comprises a plurality of MEMS switches arranged on a substrate about, and close to, a central point, each MEMS switch being disposed on a common imaginary circle centered on the central point. Additionally, and each MEMS switch is preferably spa... | 10/02/2007 |
| 7259640 | Miniature RF and microwave components and methods for fabricating such components RF and microwave radiation directing or controlling components are provided that may be monolithic, that may be formed from a plurality of electrodeposition operations and/or from a plurality of deposited layers of material, that may include switches, inductors, ant... | 08/21/2007 |
| 7256666 | Band rejection filter with attenuation poles A band rejection filter with attenuation poles includes a plurality of series resonant circuits having end terminals connected in common and other end terminals connected in series via a plurality of transmission lines each having a length that is an odd multiple of... | 08/14/2007 |
| 7253699 | RF MEMS switch with integrated impedance matching structure An impedance matching structure for a RF MEMS switch having at least one closeable RF contact in an RF line, the impedance matching structure comprising a protuberance in the RF line immediately adjacent the RF contact that forms one element of a capacitor, the othe... | 08/07/2007 |
| 7250830 | Dual band full duplex mobile radio A dual band full duplex mobile radio is provided that includes a transmit portion including a dual band filter and a receive portion including a dual band filter. The dual band full duplex mobile radio further includes a circulator connecting the transmit portion an... | 07/31/2007 |
| 7245269 | Adaptive beam forming antenna system using a tunable impedance surface A method of and apparatus for beam steering. A feed horn is arranged so that the feed horn illuminates a tunable impedance surface comprising a plurality of individually tunable resonator cells, each resonator element having a reactance tunable by a tuning element a... | 07/17/2007 |
| 7236068 | Electronically tunable combine filter with asymmetric response Electronic filters include an input, an output and a plurality of resonators series coupled between the input and the output. Each of the resonators is coupled to a tunable capacitance. In addition, a coupling means is provided between non-adjacent ones of the reson... | 06/26/2007 |
| 7221243 | Apparatus and method for combining electrical signals An apparatus and method are presented for combining electrical signals. The apparatus includes a phase-shift distributed element with an input to accept a first signal and an output to supply the first signal with a phase-shift; and a filter with a first signal port... | 05/22/2007 |
| 7215225 | Superconductor filter A superconductor filter comprises a plurality of resonance elements arranged between input-output lines formed on a substrate. Metal conductor sections serving to inhibit the spatial coupling between the adjacent resonance elements are arranged between prescribed re... | 05/08/2007 |
| 7212789 | Tunable duplexer The method and apparatus herein identifies tunable duplexer in a communication system. The tunable duplexer includes a tunable receiver filter, a tunable transmitter filter, a variable receiver phase shifter, and variable transmitter phase shifter. Each filter and p... | 05/01/2007 |
| 7170011 | System and method for modifying electrical characteristics System and methods for modifying an electrical parameter of an electrical component are described. The system includes an electrical component disposed on a circuit board and a dielectric material. The electrical component has an electrical parameter that is sensiti... | 01/30/2007 |
| 7164387 | Compact tunable antenna The present disclosure relates to a method and an antenna for transmitting/receiving a RF signal at a plurality of different frequencies. Transmitting/receiving a RF signal at a plurality of different frequencies is achieved by providing a F antenna comprising a plu... | 01/16/2007 |
| 7164306 | Composite multiplexer circuit and chip component, high-frequency module and radio communication apparatus using the same In a composite multiplexer circuit designed to multiplex plural frequency bands by interconnecting plural multiplexer circuits in parallel, a multiplexer circuit for extracting a frequency band of a GPS reception system includes a matching network including an induc... | 01/16/2007 |
| 7154451 | Large aperture rectenna based on planar lens structures A rectenna structure comprising a flexible, dielectric sheet of material; a plurality of metallic lenslets disposed on the sheet of material; and a plurality of diodes disposed on the sheet of material, each diode in said plurality of diodes being arranged at a focu... | 12/26/2006 |
| 7126444 | Multi-layer band-pass filter A multi-layer band-pass filter comprises an unbalanced input, two balanced outputs, and a band-pass filter section provided between the unbalanced input and the two balanced outputs. The band-pass filter section incorporates a plurality of resonators each of which i... | 10/24/2006 |
| 7116186 | Dual-band bandpass filter A dual-band bandpass filter having a first pass band and a second pass band respectively corresponding to a first frequency and a second frequency. The filter includes a first pair of resonators, a second pair of resonators and a first coupling element. The first pa... | 10/03/2006 |
| 7102460 | Duplexer with extended functionality A duplexer has an asymmetrical antenna port and a symmetrical reception output, and therefore can be interconnected (without any intermediate stages) to an amplifier with a differential input. A reception bandpass filter is arranged in the reception path of the dupl... | 09/05/2006 |
| 7096565 | Flanged inner conductor coaxial resonators A method and apparatus for making an inner conductor from a conductive body integrally forms a flange on one end of the conductive body. The flange is formed integral to the conductive body by flaring the end of the conductive body. The size and shape of the flange ... | 08/29/2006 |
