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| Number | Title | Issue Date |
| 8164400 | Distributed constant type filter device A distributed constant type filter includes a substrate including a part made of a first dielectric material having a first relative dielectric constant and a different-material part made of a second dielectric material having a second relative dielectric constant d... | 04/24/2012 |
| 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 |
| 8130061 | Filter A filter being small and having a narrowband filter characteristic is achieved using interdigital-coupled resonators. A first resonator and a second resonator are configured using interdigital-coupled quarter-wavelength resonators respectively. In addition, the firs... | 03/06/2012 |
| 8130062 | Microstripline filter A microstripline filter that includes principal-surface lines, a ground electrode, and input/output electrodes. A first principal-surface line is capacitively coupled to a second principal-surface line. The second principal-surface line is inductively coupled to a t... | 03/06/2012 |
| 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 |
| 8081051 | EMI suppressor having bandpass filtering function An electromagnetic interference (EMI) suppressor having a bandpass filtering function is provided. The EMI suppressor is disposed on a substrate, and includes a signal line, a ground line, an open-circuit line, a first line group, and a second line group. The signal... | 12/20/2011 |
| 8081050 | Multilayer planar tunable filter An electronic device includes a first strip conductor formed from a first metal level over a substrate. A second strip conductor formed from a second metal level is located between the first strip conductor and the substrate. At least one of the first and the second... | 12/20/2011 |
| 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 |
| 8040208 | Module and passive part A passive part includes a filter unit having first resonance electrode to a third resonance electrode and an impedance matching circuit unit electrically connected to the third resonance electrode of the filter unit arranged on a dielectric substrate. The entire pas... | 10/18/2011 |
| 8013693 | Meta-material for use in a base station of a wireless communication system A meta-material filter that may be used in constructing a duplex filter is provided. The metal-material filter is comprised of a substrate, a plurality of metal strips periodically positioned on the substrate, and a ground plane spaced from the plurality of metal st... | 09/06/2011 |
| 8008996 | Low-pass filter A low-pass filter (10) includes an input portion (100) inputting an electromagnetic signal, an output portion (120) outputting the electromagnetic signal, a high impedance transmission portion (140) electrically connected to the input por... | 08/30/2011 |
| 7990236 | Low-pass filter A low-pass filter (10) includes an input portion (100) for input of an electromagnetic signal, an output portion (120) for output of the electromagnetic signal, a high impedance transmission portion (140) electrically connecting the input... | 08/02/2011 |
| 7990235 | Simultaneous switching noise filter architecture and method The present invention is directed to a transmission line assembly and method of propagating signals therethrough that features forming transmission lines of the assembly to provide desired filtering properties. To that end, the assembly includes a plurality of space... | 08/02/2011 |
| 7982559 | Stripline filter A stripline filter with wide-band filter characteristics having an attenuation pole on a high frequency side of frequency characteristics. The stripline filter includes at least three resonant lines, and two of the resonant lines include parallel line parts and bent... | 07/19/2011 |
| 7978028 | Dual mode generating line coupled to a dual mode ring resonator filter by half the length of the ring resonator At a first coupling point on a ring resonator having a ring-shaped transmission line, an input feeder is electromagnetically coupled with the ring resonator. An output feeder is electromagnetically coupled with the ring resonator at a second coupling point on the ri... | 07/12/2011 |
| 7978027 | Coplanar waveguide resonator and coplanar waveguide filter using the same A coplanar waveguide resonator (100a) has a center conductor (101) formed on a dielectric substrate (105) that has a line conductor (a center line conductor) (101b) extending in the input/output direction, a ground conductor... | 07/12/2011 |
| 7965158 | Hairpin microstrip bandpass filter A microstrip filter having a plurality of hairpin microstrip resonators each having two substantially rectangular legs connected at one end and generally configured in a “U” shape. The microstrip filter may comprise a first of the plural resonators operatively c... | 06/21/2011 |
| 7932793 | Common mode filtering method and device Provided are common mode filtering method and device for use with a defected ground structure, the device including a substrate, coupled microstrip lines formed on the substrate and a ground plane formed underneath the substrate, the common mode filtering method bei... | 04/26/2011 |
| 7907036 | Microstripline filter and method for manufacturing the same A microstripline filter in which characteristics of a plurality of resonators which are connected to one another in a manner of inductive coupling are precisely set. The microstripline filter includes a ground electrode, main-surface lines, common electrodes, short-... | 03/15/2011 |
| 7902945 | Dual mode ring resonator filter with a dual mode generating line disposed inside the ring resonator A dual-mode filter capable of providing a high degree of design freedom and/or tunability is disclosed. The dual-mode filter includes a ring resonator; an input feeder and an output feeder disposed substantially orthogonal with respect to each other and with respect... | 03/08/2011 |
| 7868718 | Balanced filter device A balanced filter suitable for a reduction of the filter size. The balanced filter comprises strip-line resonators (SL1a, SL1b) constituting resonance electrodes coupled to an unbalanced terminal, strip-line resonators (SL3a... | 01/11/2011 |
| 7859366 | Reflection-type bandpass filter Provided is a reflection-type bandpass filter for ultra-wideband wireless data communication, including a substrate. The substrate includes a dielectric layer and a ground layer deposited on one surface of the dielectric layer, a center conductor provided on a surfa... | 12/28/2010 |
| 7855622 | Reflection-type bandpass filter A reflection-type bandpass filter for ultra-wideband wireless data communication is provided. The filter comprises two conductors extending in a first direction on the surface of a dielectric substrate at a first distance from each other, the surface of the dielectr... | 12/21/2010 |
| 7855621 | Reflection-type bandpass filter A reflection-type bandpass filter for ultra-wideband (UWB) radio data communications is provided. The reflection-type bandpass filter includes a substrate formed by laminating a conducting layer and a dielectric layer, and a microstrip line made of a conductor of a ... | 12/21/2010 |
| 7852173 | Reflection-type bandpass filter This invention provides a reflection-type bandpass filter for ultra-wideband wireless data communication, in which are provided, on the surface of a dielectric substrate, a center conductor and side conductors, provided on both sides of the center conductor, securin... | 12/14/2010 |
| 7839240 | Reflection-type banpass filter Provided is a reflection-type bandpass filter for ultra-wideband wireless data communication. The filter includes a substrate including a dielectric layer and a conducting layer layered on the top and bottom surfaces thereof, and a center conductor provided within t... | 11/23/2010 |
| 7821361 | Second-order band-pass filter and wireless apparatus using the same A second-order band-pass filter for generating at least two transmission zeros includes a first signal terminal, a second signal terminal, a first transmission line resonator, a second transmission line resonator and an impedance inverter. The first transmission lin... | 10/26/2010 |
| 7812693 | Lowpass-bandstop common mode filter for differential lines carrying high rate digital signals The present invention provides a novel structure that can be used to make a common mode filter. Only the common mode will be attenuated and the differential mode will not be attenuated. This structure can be implemented in a number of ways, a specific embodiment usi... | 10/12/2010 |
| 7800465 | Passive component A passive component is provided with a filter section employing a nonequilibrium input/output system, which has an input side resonator connected to a nonequilibrium input terminal, and an output side resonator coupled with the input side resonator; and a converting... | 09/21/2010 |
| 7791436 | Radio frequency filter having coupled transmission lines and an acoustic impedance element A radio filter has a band pass filter for passing a desired band of signal frequencies and a band stop filter for reducing the passing of a band of undesired signal frequencies. The filter comprises an input terminal, an output terminal, and a filter having a multip... | 09/07/2010 |
| 7764147 | Coplanar resonator and filter using the same A coplanar resonator which is comprised of a dielectric substrate, a center conductor formed in the surface thereof, and a ground conductor formed so as to surround the same center conductor, wherein the same center conductor is comprised of a main line conductor | 07/27/2010 |
| 7764149 | Electromagnetic bandgap structure and printed circuit board An electromagnetic bandgap structure and a printed circuit board that can solve a mixed signal problem between an analog circuit and a digital circuit are disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure can... | 07/27/2010 |
| 7755458 | Reflection-type bandpass filter This invention provides a reflection-type bandpass filter for ultra-wideband wireless data communication, in which are provided, on the surface of a dielectric substrate, a center conductor and side conductors, provided on both sides of the center conductor, securin... | 07/13/2010 |
| 7755457 | Stacked stripline circuits The present invention provides a method and apparatus for design of low loss, size restricted high frequency circuits. In a preferred embodiment, an electronic device includes: a first circuit layer located above the main circuit board comprising a first stripline p... | 07/13/2010 |
| 7724109 | Ball grid array filter A ball grid array ceramic filter including a substrate having a ground layer of conductive material disposed over one of the surfaces thereof and a plurality of strips of conductive material on the other of the substrate surfaces defining resonators adapted to recei... | 05/25/2010 |
| 7710222 | Dual band resonator and dual band filter A signal input/output line 101 is used for input and output of a signal. A first resonating part 102 is connected to the signal input/output line 101 at one end and is opened at the other end. A second resonating part 103 is connected to ... | 05/04/2010 |
| 7705695 | Composite via structures and filters in multilayer printed circuit boards A composite via structure in a multilayer printed circuit board (PCB) and also compact and shielded filters formed by the use of composite via structures as building blocks are provided. The composite via structure consists of two functional parts. The first functio... | 04/27/2010 |
| 7688162 | Hairpin microstrip bandpass filter A microstrip filter having a plurality of hairpin microstrip resonators each having two substantially rectangular legs connected at one end and generally configured in a “U” shape. The microstrip filter may comprise a first of the plural resonators operatively c... | 03/30/2010 |
| 7683743 | Filtering circuit and structure thereof A filtering circuit and a structure thereof are provided. The filtering circuit includes an input terminal, an output terminal, a resonant circuit, a first coupling portion, and a second coupling portion. The resonant circuit is coupled between the input terminal an... | 03/23/2010 |
| 7679475 | Bandpass filter and high frequency module using the same and radio communication device using them A bandpass filter having a bandpass width appropriate for UWB, a high frequency module including the bandpass filter, and radio communication device including both is provided. The bandpass filter including a laminate composed of a plurality of dielectric layers ... | 03/16/2010 |
