Resonant, Discrete Frequency Selective Type Patents (Class 333/175)
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Patent number: 8816797Abstract: A multilayer filter includes a plurality of mutually coupled resonant circuits provided within a multilayer body. Capacitor internal electrodes, inductor internal electrodes, and inductor via electrodes, ground via electrodes, and input-output via electrodes are arranged within the multilayer body. The ground via electrodes and the input-output via electrodes are provided on a dielectric layer on a mounting surface, or a second dielectric layer on a first dielectric layer provided on the mounting surface. The capacitor internal electrodes arranged towards the side of the mounting surface do not overlap the input-output electrodes when viewed in plan view. With this configuration, degradation in frequency characteristics of a resonant circuit is effectively prevented by controlling one of an inductive component and a capacitive component of the resonant circuit.Type: GrantFiled: August 7, 2012Date of Patent: August 26, 2014Assignee: Murata Manufacturing Co., Ltd.Inventor: Koji Nosaka
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Patent number: 8816798Abstract: A parallel plate waveguide structure may be configured to suppress spurious propagating modes by including a lossy frequency selective surface (FSS). The electromagnetic material properties of individual layers disposed between the conductive plates of the waveguide may be engineered to extend the suppression band of the fundamental TE mode up to the cutoff frequency of the second TE mode. Examples of mode suppression structures are presented and analyzed by transverse resonance models. Applications include, for example, cavity mode suppression in microwave and millimeterwave assemblies at the board, package, and chip level.Type: GrantFiled: February 24, 2010Date of Patent: August 26, 2014Assignee: WEMTEC, Inc.Inventor: William E. McKinzie, III
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Publication number: 20140232485Abstract: A discharge capacitor for use in electronic circuits is described. The discharge capacitor has first internal electrodes in electrical contact with a first external termination and second internal electrodes parallel to and interleaved with the first internal electrodes wherein the second internal electrodes are in electrical contact with a second external termination. A dielectric is between the first internal electrodes and adjacent second internal electrodes. A first discharge gap is between at least one first internal electrode of said first internal electrodes and said second external termination.Type: ApplicationFiled: April 28, 2014Publication date: August 21, 2014Applicant: Kemet Electronics CorporationInventors: John Bultitude, Mark R. Laps, Lonnie G. Jones
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Publication number: 20140203890Abstract: A filter circuit includes an antenna-side circuit, a transmission-side circuit, a reception-side circuit, and an external connection capacitor. The antenna-side circuit is connected to an antenna-side terminal. The transmission-side circuit is connected to a transmission-side terminal and the antenna-side circuit. The reception-side circuit is connected to a reception-side terminal, the antenna-side circuit, and ground. The external connection capacitor is connected between an external control terminal and a connection point between the antenna-side circuit and the reception-side circuit. The antenna-side circuit and the transmission-side circuit constitute a low pass filter. The antenna-side circuit and the reception-side circuit constitute a band pass filter. The reception-side circuit includes an LC parallel resonant circuit.Type: ApplicationFiled: October 15, 2013Publication date: July 24, 2014Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Tetsuo TANIGUCHI
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Patent number: 8751993Abstract: A method of designing a microwave filter using a computerized filter optimizer, comprises generating a filter circuit design in process (DIP) comprising a plurality of circuit elements having a plurality of resonant elements and one or more non-resonant elements, optimizing the DIP by inputting the DIP into the computerized filter optimizer, determining that one of the plurality of circuit elements in the DIP is insignificant, removing the one insignificant circuit element from the DIP, deriving a final filter circuit design from the DIP, and manufacturing the microwave filter based on the final filter circuit design.Type: GrantFiled: July 11, 2013Date of Patent: June 10, 2014Assignee: Resonant LLCInventors: Neal Fenzi, Kurt Raihn
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Patent number: 8742871Abstract: A bandpass filter comprises a first capacitor, a second capacitor, a third capacitor and at least two resonators. The first and second capacitors are coupled in parallel with each other, and each of the first and second capacitors includes an input. The third capacitor is coupled between the first capacitor and the second capacitor at their respective inputs. The at least two resonators are coupled in parallel with the first capacitor and the second capacitor and are positioned adjacent to each other at a distance such that the at least one component of the resonators are electromagnetically coupled together to provide three (3) transmission zeros.Type: GrantFiled: March 10, 2011Date of Patent: June 3, 2014Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Jun-De Jin, Ming Hsien Tsai, Tzu-Jin Yeh
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Patent number: 8742869Abstract: A high power, low passive inter-modulation capacitor is presented, which is formed using metal clad substrates, which are broad-side coupled through a thin air gap. Each substrate may include metal layers affixed on both sides which are electrical coupled together to form a single capacitor plate, or each substrate may have only a single metal layer on the surface adjacent to the air gap. The capacitor has particular application in low cost RF and microwave filters, which may be used in communication equipment and communication test equipment such a diplexers, for low PIM applications.Type: GrantFiled: March 16, 2011Date of Patent: June 3, 2014Assignee: K&L Microwave, Inc.Inventor: Rafi Hershtig
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Patent number: 8736400Abstract: A bandpass filter includes a first oscillating circuit having inductors (L1, L2) in parallel with capacitors (Cij1), and a second oscillating circuit having inductors (L3, L4) arranged in parallel with capacitors (Cij2). The capacitors (Cij1) of the first oscillating circuit have an assembly of variable capacitive elements (C11, C12, C13, C14) in series with a fixed capacitor (C1), and the capacitors (Cij2) of the second oscillating circuit have an assembly of variable capacitive elements (C21, C22, C23, C24) arranged in series with a fixed capacitor (C2). The first oscillating circuit and the second oscillating circuit are coupled together with capacitors of substantially fixed value (C3, C4) and these coupling capacitors are linked to different respective midpoints between variable capacitors in the first and second oscillating circuits.Type: GrantFiled: October 5, 2007Date of Patent: May 27, 2014Assignee: ThalesInventor: Marc Pouplier
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Publication number: 20140140016Abstract: A power metal mesh and a semiconductor memory device including the same are provided. As the power metal mesh configured to reduce noise coupling generated between adjacent chips disposed on an interposer, a band stop filter unit including an inductor and a capacitor coupled in parallel is disposed between the adjacent chips to effectively reduce the noise coupling of a specific frequency band generated between the adjacent chips.Type: ApplicationFiled: March 18, 2013Publication date: May 22, 2014Applicant: SK HYNIX INC.Inventors: Jun Ho LEE, Sung Woo HAN, Ic Su OH, Boo Ho JUNG, Sun Ki CHO, Yang Hee KIM, Tae Hoon KIM
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Patent number: 8729980Abstract: A CRLH resonator-based band-pass filter includes at least two CRLH resonators. The resonators are connected by capacitive coupling. The resonators includes a microstrip line having input and output ports. The microstrip line includes a first interdigital line serial-connected to the input port, a second interdigital line serial-connected to the output port, a connection line connecting the first and second interdigital lines, and an inductor line parallel-connected to the connection line and provided with a grounded end.Type: GrantFiled: November 3, 2010Date of Patent: May 20, 2014Assignee: Electronics and Telecommunications Research InstituteInventors: Dong-Ho Kim, Jae-Ick Choi, Sungtek Kahng, Geonho Jang
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Patent number: 8723622Abstract: Parameters of a radio frequency filter can be changed by changing structure of each component of the filter. Material of each component, diameters of each of magnetic cylinders, density of each of conductive coils, and thickness of each of dielectric layers can be changed. When any component needs to be replaced, the filter can be detached as needed.Type: GrantFiled: December 16, 2009Date of Patent: May 13, 2014Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Shen-Chun Li, Shou-Kuo Hsu, Yung-Chieh Chen, Hsien-Chuan Liang
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Patent number: 8701065Abstract: A method of designing an acoustic microwave filter comprises selecting a filter section based on frequency response requirements. The filter section includes an input, an output, and a plurality of circuit elements. The circuit elements have at least in-line acoustic resonators or in-shunt acoustic resonators. The method further comprises selecting a value for each circuit element, selecting a number of filter sections, and cascading the selected number of filter sections to create a cascaded filter circuit design, such that at least one pair of immediately adjacent filter sections are connected to each other via their inputs or their outputs. The method further comprises adding parasitic effects to the cascaded filter circuit design to create a pre-optimized filter circuit design, optimizing the pre-optimized filter circuit design to create a final filter circuit design, and constructing the acoustic microwave filter based on the final filter circuit design.Type: GrantFiled: July 10, 2013Date of Patent: April 15, 2014Assignee: Resonant LLCInventors: Richard N. Silver, Kurt F. Raihn, Neal O. Fenzi, Robert B. Hammond
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Patent number: 8700199Abstract: Disclosed is a resonator made up of three sections (i.e., first, second and third sections) of a semiconductor layer. The second section has an end abutting the first section, a middle portion (i.e., an inductor portion) coiled around the first section and another end abutting the third section. The first and third sections exhibit a higher capacitance to the wafer substrate than the second section. Also disclosed are a process control system and method that incorporate one or more of these resonators. Specifically, during processing by a processing tool, wireless interrogation unit(s) detect the frequency response of resonator(s) in response to an applied stimulus. The detected frequency response is measured and used as the basis for making real-time adjustments to input settings on the processing tool (e.g., as the basis for making real-time adjustments to the temperature setting(s) of an anneal chamber).Type: GrantFiled: March 21, 2011Date of Patent: April 15, 2014Assignee: International Business Machines CorporationInventors: Mete Erturk, Ezra D. B. Hall, Kirk D. Peterson
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Publication number: 20140091874Abstract: The present disclosure is directed to systems and methods for operating, designing, testing and verifying the performance of wireless communication devices. Specifically, the present systems and methods can passively attenuate unwanted electromagnetic interference (EMI) without degrading signal quality of predetermined frequency using a novel versatile module including a RF absorbing material in a composite medium surrounding the conducting signal lines. Utilizing varying permeability media, the present invention offer a robust platform to eliminate unwanted noise while maintaining a desirable control and power interfaces used for testing of wireless communication systems.Type: ApplicationFiled: October 1, 2012Publication date: April 3, 2014Inventors: Ron Cook, James Sozanski
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Patent number: 8681030Abstract: Apparatuses for composing LC resonators in a continuous-time RF bandpass delta-sigma modulator are provided. A plurality of resonator inductors are shaped and strategically positioned on an integrated circuit die to minimize the resonant couplings. The resonator inductors can be also constructed from pairs of bond wires connected to a ground paddle, or to a set of lead frame pins. The inductance in each resonator can be increased by appending a specifically shaped planer inductor constructed from the PCB metal track to the bond wire pair via two lead frame pins.Type: GrantFiled: December 9, 2012Date of Patent: March 25, 2014Inventor: Phuong Thu-Minh Huynh
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Patent number: 8680945Abstract: Negative refractive index (NRI) transmission line (TL) metamaterial may be applied to phase shifter devices. In some aspects, a one dimensional NRI TL enabled compact and tunable phase shifter is provided. The phase shifter comprises cascaded sections of NRI metamaterial TL and positive refraction index TL with tailored dispersion characteristics. The phase shifter, for example as compared to common delay line based or ferrite based phase shifters, may be compact in size, may be continuously tunable from negative to positive phases, may have flatter and more linear phase responses over wideband, may have small group delays, and may be compatible to microwave circuits.Type: GrantFiled: January 26, 2011Date of Patent: March 25, 2014Assignee: Lockheed Martin CorporationInventor: Leah Wang
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Publication number: 20140035702Abstract: This disclosure provides implementations of filters and filter topologies, circuits, structures, devices, apparatus, systems, and related processes. In one aspect, a device includes one or more LC resonant circuit stages. In some implementations, each LC stage includes an inductor and a capacitor. Each LC stage also has a corresponding resonant frequency. The one or more LC stages are arranged to produce an unmodified passband over a range of frequencies having a corresponding bandwidth. One or more microelectromechanical systems (MEMS) resonators are arranged with the one or more LC stages. The one or more MEMS resonators are arranged with the one or more LC stages so as to modify characteristics of the unmodified passband such that the hybrid filter produces a modified passband having a modified bandwidth and one or more other modified band characteristics.Type: ApplicationFiled: July 31, 2012Publication date: February 6, 2014Applicant: QUALCOMM MEMS TECHNOLOGIES, INC.Inventors: Justin Phelps Black, Philip Jason Stephanou, Jonghae Kim, Je-Hsiung Jeffrey Lan, Sang-June Park, Changhan Hobie Yun, Chi Shun Lo, Chengjie Zuo
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Publication number: 20140022030Abstract: An exemplary embodiment of the present disclosure illustrates a signal transmission cell having a first through third conductors, a capacitor and an inductor. The first and third conductors form a first transmission circuit, and the second and the third conductors form a second transmission circuit. Signals which are respectively conveyed on the first transmission circuit and the second transmission circuit have the same magnitude, but have the opposite phases to each other, so as to form a pair of differential transmission lines. A first end of the inductor is electrically connected to the third conductor, and a second end of the inductor is electrically connected to a ground voltage. A first end of the capacitor is electrically connected to the first end of the inductor, and a second end of the capacitor is electrically connected to the second end the inductor.Type: ApplicationFiled: December 29, 2012Publication date: January 23, 2014Applicant: NATIONAL TAIWAN UNIVERSITYInventors: TZONG-LIN WU, CHIH-YING HSIAO, CHUNG-HAO TSAI
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Publication number: 20140002210Abstract: A hybrid filter may include sum, low-pass, high-pass, and intermediate nodes. A terminating impedance may couple the intermediate node to a circuit ground. A first low-pass network may couple the sum node to the low-pass node, and a first high-pass network may couple the sum node to the high-pass node. A second low-pass network may couple the high-pass node to the intermediate node. A second high-pass network may couple the low-pass node to the intermediate node. The second high-pass network may include the series connection of a first capacitor, a coupling network, and a second capacitor. The coupling network may include two coupling sections each with planar broadside-coupled first, second, and third conductor elements separated by dielectric layers. The first and third conductor elements in each section may be connected electrically in parallel.Type: ApplicationFiled: June 28, 2012Publication date: January 2, 2014Applicant: WERLATONE, INC.Inventors: Allen F. Podell, Andrew Kearns, Ky-Hien Do
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Patent number: 8606211Abstract: A preselect circuit maintains the dynamic range of a received RF input signal during bandpass filtering of the received RF input signal. The preselect circuit includes a Q-deficient passive bandpass filter for coupling to an antenna to receive a received RF input signal. The preselect circuit further includes a Q-enhancement circuit coupled to the Q-deficient passive bandpass filter, wherein the Q-enhancement circuit increases a Q-value of the Q-deficient passive bandpass filter by compensating for resistive inductive losses in the bandpass filter.Type: GrantFiled: June 23, 2009Date of Patent: December 10, 2013Assignee: QUALCOMM IncorporatedInventors: Bruce A. Judson, Cong T. Nguyen
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Publication number: 20130293318Abstract: The present invention relates to the bandpass filter of an RF communication system. The bandpass filter embodies a dual band characteristic by combining an equilibrium zero-order resonator and a non-equilibrium zero-order resonator, provides transmission zero using a cross-coupling structure near a pass band, and also has a neighboring signal blocking characteristic.Type: ApplicationFiled: January 30, 2013Publication date: November 7, 2013Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventor: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
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Publication number: 20130278353Abstract: A filter circuit is provided having multipath interference mitigation. The filter includes a signal path extending from an input to an output. The signal path includes a conductive path and a ground. A pass band filter is disposed along the signal path between the input and the output. The pass band filter passes a first frequency spectrum in a provider bandwidth, and attenuates a second frequency spectrum in a home network bandwidth. The filter circuit further includes a multipath interference mitigation leg operatively branched from the signal path. The multipath interference mitigation leg increases a return loss of the home network bandwidth. A frequency response of the filter circuit is characterized by an insertion loss characteristic between the input and the output being less than 3 dB in the provider bandwidth, and more than 20 dB in the home network bandwidth.Type: ApplicationFiled: June 14, 2013Publication date: October 24, 2013Inventors: Erdogan Alkan, Raymond W. Palinkas
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Publication number: 20130271241Abstract: The invention discloses a balance filter formed from a combination of a first circuit and a second circuit, wherein both the first circuit and the second circuit have at least one through-hole via inductor. The balance filter is connected to an IC through a first terminal and a second terminal, wherein a power trace is disposed between the first circuit and the second circuit to deliver the power to the IC.Type: ApplicationFiled: April 12, 2013Publication date: October 17, 2013Applicant: CYNTEC CO., LTD.Inventors: Chen-Chung Liu, Ian-Chun Cheng
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Publication number: 20130271240Abstract: The invention discloses a high-frequency device having a through-hole via inductor in a substrate. The through-hole via inductor has an integral body. The inductance of the through-hole via inductor is greater than that of the horizontal inductor. The through-hole via inductor comprises at least two materials, wherein one of said at least two materials is a conductive material. The present invention also discloses a method for manufacturing the structure of the high-frequency device, wherein the method mainly includes via-drilling and via-filling in the substrate, and lithography process on the substrate.Type: ApplicationFiled: August 9, 2012Publication date: October 17, 2013Applicant: CYNTEC CO., LTD.Inventors: Chen-Chung Liu, Ian-Chun Cheng
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Publication number: 20130257561Abstract: In one embodiment, front end circuitry for an electronic appliance, the front end circuitry comprising: a first port configured to conduct signals from a signal source, the signals comprising a first signal and a second signal; a first filter coupled to the first port, the first filter configured to filter the first signal according to a first frequency band and output the filtered first signal for further processing; a second filter coupled to the first port and arranged in parallel with the first filter, the second filter configured to absorb the second signal according to a second frequency band that is a stopband for the first filter; and an impedance load coupled between an output of the second filter and ground.Type: ApplicationFiled: March 30, 2012Publication date: October 3, 2013Applicant: BROADCOM CORPORATIONInventor: Ignacio (Jose) Gorostegui
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Publication number: 20130249645Abstract: There are provided a non-magnetic composition for a ceramic electronic component, a ceramic electronic component using the same, and a method of manufacturing the same. The non-magnetic composition includes a compound represented by Chemical Formula Zn1-xCuxMn2O4. Therefore, DC bias characteristics of the ceramic electronic component may be improved by employing the non-magnetic composition having no magnetic characteristics.Type: ApplicationFiled: June 29, 2012Publication date: September 26, 2013Inventors: Ho Yoon KIM, Min Kyoung Cheon, Sung Yong An, Young Il Lee, Myeong Gi Kim
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Publication number: 20130249656Abstract: Aspects of the disclosure provide a circuit package. The circuit package includes a first signal terminal electrically coupled with a serializer/deserializer (SERDES), a second signal terminal electrically coupled with an external electronic component, and a trace disposed on an insulating layer. The trace is configured to transfer an electrical signal between the first signal terminal and the second signal terminal. The trace is patterned to provide a specific filtering characteristic to filter the electrical signal.Type: ApplicationFiled: March 20, 2013Publication date: September 26, 2013Applicant: Marvell Israel (M.I.S.L) Ltd.Inventor: Pavel VILNER
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Publication number: 20130241290Abstract: According to one embodiment, a filter circuit includes a first filter that includes two first capacitors connected in series, two single-phase AC reactors connected to one ends of the two first capacitors, respectively, a second capacitor connected at one end to a neutral point of the two first capacitors, and a third capacitor connected between another ends of the two single-phase AC reactors, and a second filter that includes two common mode chokes and two fourth capacitors connected in series between one ends of the two common mode chokes.Type: ApplicationFiled: May 9, 2013Publication date: September 19, 2013Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Tsuyoshi HIGUCHI, Hidenori HARA
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Publication number: 20130241672Abstract: A multilayer bandpass filter includes a first capacitor electrode of a first stage LC parallel resonator, a second capacitor electrode of a second stage LC parallel resonator, and a third capacitor electrode of a third stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the first stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the second stage LC parallel resonator. Via electrodes and a line electrode define an inductor electrode of the third stage LC parallel resonator. The inductor electrodes of the three LC parallel resonators are arranged so loop planes thereof are disposed about a center axis extending in a stacking direction of dielectric layers. This permits setting of electromagnetic coupling between the LC parallel resonators of an input and an output stage, and allows a filter's attenuation characteristics to be freely set.Type: ApplicationFiled: April 26, 2013Publication date: September 19, 2013Applicant: Murata Manufacturing Co., Ltd.Inventors: Ikuo TAMARU, Hiroshi MASUDA, Hirokazu YAZAKI
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Patent number: 8538367Abstract: A filter circuit enhances a deficient Q-value in a filter stage and buffers the filter stage from subsequent filter stages using a common active device. A filter circuit includes a first buffered filtering stage including a first Q-deficient filter stage to receive an input signal and a first Q-enhancement buffer stage. The first Q-enhancement buffer stage is coupled to the first Q-deficient filter stage, wherein the first Q-enhancement buffer stage includes a single active device to increase a Q-value of the first Q-deficient filter stage and isolate the first Q-deficient filter stage from any subsequent filter stage. A filtering method includes filtering an input signal in a first Q-deficient filter stage and enhancing a deficient Q-value of the first Q-deficient filter stage with an active device. The method further includes buffering the first Q-deficient filter stage from any subsequent filter stage with the active device.Type: GrantFiled: June 29, 2009Date of Patent: September 17, 2013Assignee: QUALCOMM IncorporatedInventors: Bruce A. Judson, Cong T. Nguyen
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Patent number: 8531253Abstract: In an ultra-wideband (UWB) band-pass filter, an equivalent circuit of a band-pass filter for direct frequency conversion is configured to have a series LC resonator and a parallel LC resonator, the parallel LC resonator is implemented as a short stub and an open stub, and the series LC resonator is implemented by modeling an inductor and a capacitor as a distributed constant circuit. The series LC resonator is implemented to have a 3D structure for effective designing of the band-pass filter by a new method of implementing a series resonator circuit. In the UWB band-pass filter, a low-pass filter for improving band-stop characteristics is additionally connected.Type: GrantFiled: December 16, 2008Date of Patent: September 10, 2013Assignee: Soonchunhyang University Industry Academy Cooperation FoundationInventors: Dal Ahn, Jong Im Park
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Patent number: 8514036Abstract: A parallel plate waveguide structure configured to suppress parallel-plate waveguide modes is described. The electromagnetic material properties of individual layers disposed between the conductive plates of waveguide may be selected to allow an apparent stopband to form. Several physical examples of electromagnetic bandgap (EBG) structures are presented that are analyzed by full wave simulations and transverse resonance models.Type: GrantFiled: August 6, 2008Date of Patent: August 20, 2013Assignee: Wemtec, Inc.Inventor: William E. McKinzie, III
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Publication number: 20130207745Abstract: Three-dimensional (3D) Radio Frequency (RF) inductor-capacitor (LC) band pass filters having through-glass-vias (TGVs). One such L-C filter circuit includes a glass substrate, a first portion of a first inductor formed on a first surface of the glass substrate, a second portion of the first inductor formed on a second surface of the glass substrate, and a first set of TGVs configured to connect the first and second portions of the first inductor. Additionally the L-C filter circuit can include a second inductor similar to the first inductor, and a metal-insulator-metal (MIM) capacitor formed between the first and second inductor, such that the first and second inductor are coupled through the MIM capacitor.Type: ApplicationFiled: March 14, 2012Publication date: August 15, 2013Applicant: QUALCOMM IncorporatedInventors: Changhan Yun, Chengjie Zuo, Chi Shun Lo, Jonghae Kim, Mario F. Velez
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Publication number: 20130207744Abstract: A multi-layer, multi-turn structure for an inductor having a plurality of conductor layers separated by layers of insulator is described. The inductor further comprises a connector electrically connected between the conductor layers. The structure of the inductor may comprise a cavity therewithin. The structure of the inductor constructed such that electrical resistance is reduced therewithin, thus increasing the efficiency of the inductor. The inductor is particularly useful at operating within the radio frequency range and greater.Type: ApplicationFiled: March 12, 2013Publication date: August 15, 2013Inventor: NuCurrent, Inc.
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Publication number: 20130200721Abstract: A magnetic resonator includes an inductor comprising a conductive first loop having a first dipole moment and a conductive second loop having a second dipole moment wherein a direction of the first dipole moment is substantially opposite to a direction of the second dipole moment and at least one capacitor in series with at least one of the first loop and the second loop.Type: ApplicationFiled: January 28, 2013Publication date: August 8, 2013Applicant: WITRICITY CORPORATIONInventor: WiTricity Corporation
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Publication number: 20130200961Abstract: An electrical filter structure includes a first filter core structure and a second filter core structure. The first filter core structure includes a plurality of shunt impedance elements. Similarly, the second filter core structure includes a plurality of shunt impedance elements. Shunt impedance elements of the first filter core structure are arranged in different conducting layers of a multi-layer structure, and shunt impedance elements of the second filter core structure are arranged in different layers of the multi-layer structure. Transmission lines used to implement the shunt impedance elements are interleaved.Type: ApplicationFiled: May 28, 2010Publication date: August 8, 2013Inventor: Giovanni Bianchi
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Patent number: 8502623Abstract: A band pass filter includes an original circuit. An interaction of at least two of components of the original circuit produces at least a mutual capacitor or at least a mutual inductor, which constitutes a resonance circuit with the original circuit to produce at least a transmission zero for increasing the attenuation rate of the stop band.Type: GrantFiled: February 6, 2009Date of Patent: August 6, 2013Assignee: Advanced Semiconductor Engineering, Inc.Inventors: Pao-Nan Lee, Chi-Tsung Chiu
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Patent number: 8487717Abstract: A filter circuit is provided having multipath interference mitigation. The filter includes a signal path extending from an input to an output. The signal path includes a conductive path and a ground. A pass band filter is disposed along the signal path between the input and the output. The pass band filter passes a first frequency spectrum in a provider bandwidth, and attenuates a second frequency spectrum in a home network bandwidth. The filter circuit further includes a multipath interference mitigation leg operatively branched from the signal path. The multipath interference mitigation leg increases a return loss of the home network bandwidth. A frequency response of the filter circuit is characterized by an insertion loss characteristic between the input and the output being less than 3 dB in the provider bandwidth, and more than 20 dB in the home network bandwidth.Type: GrantFiled: February 1, 2010Date of Patent: July 16, 2013Assignee: PPC Broadband, Inc.Inventors: Erdogan Alkan, Raymond W. Palinkas
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Patent number: 8482365Abstract: A multilayer bandpass filter that is capable of preventing variations in filter characteristics caused by variations in electrode formation, etc., is easily reduced in size, and performs predetermined impedance conversion between an input and an output, includes a first common electrode and a second common electrode disposed on a dielectric layer, and capacitor electrodes are disposed on a dielectric layer. An input/output terminal lead-out electrode is disposed on a dielectric layer, input/output terminal lead-out electrodes are disposed on a dielectric layer, and line electrodes are disposed on a dielectric layer. Via electrodes are formed to establish conduction in the layering direction between individual electrode patterns disposed on the plural dielectric layers. Three LC parallel resonators are constructed with such an arrangement, and respective line lengths of the line electrodes are gradually changed in order to convert the impedance between the input and the output.Type: GrantFiled: July 29, 2010Date of Patent: July 9, 2013Assignee: Murata Manufacturing Co., Ltd.Inventor: Tetsuo Taniguchi
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Publication number: 20130154761Abstract: In accordance with an embodiment, a filter network is configured to be coupled to a first switch, a second switch, and an output port. The filter network includes a first filter coupled between the first switch and the output port, and the second filter coupled between the second switch and the output port. The first filter has a pass band having a first frequency range that includes a first frequency, and a stop band that includes a second frequency that is a distortion product of the first frequency. The second filter has a second frequency range that includes the second frequency and the stop band that includes the first frequency. The second frequency range is higher in frequency than the first frequency range.Type: ApplicationFiled: December 14, 2011Publication date: June 20, 2013Applicant: Infineon Technologies AGInventor: Nikolay Ilkov
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Publication number: 20130141187Abstract: A cross-coupled bandpass filter includes first, second and third resonators such that a positive mutual inductance is generated between the first and third resonators and mutual inductance generated between the first and second resonators and mutual inductance generated between the second and third resonators have the same polarity, thereby generating a transmission zero in a high frequency rejection band.Type: ApplicationFiled: August 17, 2012Publication date: June 6, 2013Applicant: SILICONWARE PRECISION INDUSTRIES CO., LTD.Inventors: Min-Han Chuang, Chia-Chu Lai, Bo-Shiang Fang, Ho-Chuan Lin, Li-Fang Lin
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Publication number: 20130106532Abstract: A band-pass filter includes an input node coupled to receive an oscillating input signal, an output node, and a first LC resonator coupled to a first node coupled between the input node and the output node and to a first power supply node coupled to provide a first voltage. The first LC resonator includes a first capacitor, and a first inductor coupled in series with the first capacitor. The output node is coupled to output a filtered response signal that includes at least one zero based on the oscillating input signal and the first LC resonator.Type: ApplicationFiled: October 27, 2011Publication date: May 2, 2013Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.Inventors: Jun-De JIN, Tzu-Jin Yeh
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Patent number: 8421556Abstract: A switched capacitor includes a capacitor and a switch. The capacitor is coupled between a p-node and an n-node and includes interleaved p-fingers and n-fingers. A number of the p-fingers is greater than a number of the n-fingers. The switch is coupled between the n-node and ground.Type: GrantFiled: October 16, 2009Date of Patent: April 16, 2013Assignee: Broadcom CorporationInventors: Calvin (Shr-Lung) Chen, Ethan Chang
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Patent number: 8401470Abstract: A device, e.g., a hearing aid, has an electronic circuit for wireless communication of a digital signal. The circuit has a driver driving an RLC tank. The driver has a plurality of inverters whose outputs are coupled to a node of the coil via a respective one of multiple capacitors in the tank. The circuit has a controller that selectively drives one or more of the inverters with the digital signal and connects the inputs of the other inverters to a supply voltage or ground. The tank has a further plurality of series arrangements of a further capacitor and a high-voltage switch connected between the node and ground. The controller is configured for controlling the high-voltage switches.Type: GrantFiled: May 8, 2008Date of Patent: March 19, 2013Assignee: NXP B.V.Inventors: Dave Kroekenstoel, Harry Neuteboom
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Patent number: 8378763Abstract: A bandpass filter includes three resonators of which adjacent two are electromagnetically coupled to each other, and two coupling paths connected in parallel for forming capacitive coupling between non-adjacent two of the resonators. Each of the two coupling paths includes at least one capacitor and an inductor connected in series. The two coupling paths function to form an attenuation pole at a frequency lower than the passband frequencies in the pass attenuation characteristics of the bandpass filter.Type: GrantFiled: September 24, 2010Date of Patent: February 19, 2013Assignee: TDK CorporationInventor: Eiko Wakata
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Integrated wideband RF tracking filter for RF front end with parallel band switched tuned amplifiers
Patent number: 8374566Abstract: A wideband RF tracking filter having a set of parallel tuned resonator amplifier stages with a de-Q resistor for each subband is disclosed. The resonant amplifier contains programmable tuned LC tank impedance and an array of parallel voltage to current converters (V2I) for each subband. The de-Q resistor together with the array of V2I converters provides a flat gain over each subband and each of the other subbands covering different frequencies.Type: GrantFiled: April 4, 2008Date of Patent: February 12, 2013Assignee: NXP B.V.Inventors: Weinan Gao, Ray Rosik -
Publication number: 20130027154Abstract: A filter includes a first varactor with a first end electrically connected to a signal input end, a second varactor with a first end electrically connected to a second end of the first varactor, and a second end electrically connected to ground, and an inductor with a first end electrically connected to the second end of the first varactor, and a second end electrically connected to ground. The filter is capable of adjusting its frequency response by changing capacitance of the first varactor and/or the second varactor.Type: ApplicationFiled: September 21, 2011Publication date: January 31, 2013Inventor: Hsin-Ta Wu
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Patent number: 8334734Abstract: Printed multilayer filter design techniques and filters based on metamaterial structures including an extended composite left and right handed (E-CRLH) metamaterial unit cell.Type: GrantFiled: August 25, 2009Date of Patent: December 18, 2012Assignee: Hollinworth Fund, L.L.C.Inventor: Maha Achour
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Publication number: 20120313728Abstract: An apparatus for capturing power supply harmonics for use in powering a load, comprising a series resonant circuit coupled between an energy source having a waveform comprising a sinusoidal fundamental frequency and a sinusoidal harmonic, and a load that is not the earth, wherein the series resonant circuit is tuned to the harmonic frequency whereby the energy of the harmonic is directed to the load.Type: ApplicationFiled: June 10, 2011Publication date: December 13, 2012Inventor: John Louis Cairo, JR.
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Publication number: 20120299666Abstract: A multilayer filter includes a plurality of mutually coupled resonant circuits provided within a multilayer body. Capacitor internal electrodes, inductor internal electrodes, and inductor via electrodes, ground via electrodes, and input-output via electrodes are arranged within the multilayer body. The ground via electrodes and the input-output via electrodes are provided on a dielectric layer on a mounting surface, or a second dielectric layer on a first dielectric layer provided on the mounting surface. The capacitor internal electrodes arranged towards the side of the mounting surface do not overlap the input-output electrodes when viewed in plan view. With this configuration, degradation in frequency characteristics of a resonant circuit is effectively prevented by controlling one of an inductive component and a capacitive component of the resonant circuit.Type: ApplicationFiled: August 7, 2012Publication date: November 29, 2012Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Koji NOSAKA