Tunable Patents (Class 333/209)
  • Patent number: 10340124
    Abstract: A rotating microwave is established for any resonant mode TEmnl or TMmnl of a cavity, where the user is free to choose the values of the mode indices m, n and l. The fast rotation, the rotation frequency of which is equal to an operational microwave frequency, is accomplished by setting the temporal phase difference ?Ø and the azimuthal angle ?? between two microwave input ports P and Q as functions of m, n and l. The slow rotation of frequency ?? (typically 1-1000 Hz), is established by transforming dual field inputs ? cos ??t and ±? sin ??t in the orthogonal input system into an oblique system defined by the angle ?? between two microwave ports P and Q.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: July 2, 2019
    Assignee: Applied Materials, Inc.
    Inventors: Satoru Kobayashi, Hideo Sugai, Toan Tran, Soonam Park, Dmitry Lubomirsky
  • Patent number: 10276905
    Abstract: A non-contact frequency automatic tuning filter with an antileakage chamber includes a first casing with a first cavity formed at a first opening of the first casing, a moving part, and a second cavity. The second cavity has a second casing, a chamber formed in the second casing, and second and third openings penetrating through the second casing. The moving part is plugged from the third opening into the first cavity or from the third opening into a space between the third opening and the first cavity. The second opening proximate to the moving part constitutes a part of the chamber. The second casing has a spacing portion proximate to the moving part for separating the moving part and chamber. The first and second casings are not in contact with the moving part. The invention can prevent leakage of electromagnetic waves and unstable frequency shifting.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: April 30, 2019
    Inventors: Chien-Chih Li, Jen-Ti Peng, Shih-Gong Ciou, Cheng-Lung Wu, Ruei-Yang Syu, Jui-En Fan
  • Patent number: 10224588
    Abstract: A multiplex filter has at least n filter chambers which are surrounded by a housing and/or at least one insert positioned in the housing. A metal dividing device is constructed in each of the n filter chambers, dividing each filter chamber into m resonator chambers, wherein m?2. The resonator chambers are coupled perpendicular to the H fields and/or parallel to the central axis or with a component essentially perpendicular to the H fields and/or parallel to the central axis. A common connection is guided into the first filter chamber via a first opening in the housing, and is coupled in the same to the m resonators of the m resonator chambers. As a result of the fact that the coupling is established perpendicular to the H field, the resonator can have a very compact construction.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: March 5, 2019
    Assignee: Kathrein SE
    Inventor: Frank Weiβ
  • Patent number: 10211501
    Abstract: A high-frequency filter consists of a housing, which includes resonators, each of which has at least one dielectric. The n resonators are arranged along a central axis. The n resonators are isolated from one another by at least n?1 isolation devices. The n?1 isolation devices have coupling openings, through which a coupling is established at a right angle to or with one component predominantly at a right angle to the H field. A first signal line terminal is inserted into the first resonator chamber through a first opening in the housing and is in contact with the respective dielectric there. In addition or alternatively, a second signal line terminal is inserted into the nth resonator chamber through a second opening in the housing and is in contact with the respective dielectric there.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: February 19, 2019
    Assignee: Kathrein SE
    Inventor: Frank Weiß
  • Patent number: 9865909
    Abstract: An exemplary cavity resonator has a resonant frequency and includes a conductive body containing a cavity and a plate attached to the body enclosing the cavity. The position of a conductive tuning mechanism that protrudes into the cavity affects the tuning of the resonant frequency of the cavity resonator. A portion of the enclosed cavity is made of a shape memory alloy (SMA) material that has been trained to have a coefficient of thermal expansion that results in dimensional changes of the portion as the temperature varies so that the dimensional changes produce changes in the resonant frequency that counteract the combined change in the resonant frequency due to dimensional changes with temperature associated with the other portions of the enclosed cavity made of materials other than SMA material. This results in a stable resonant frequency versus temperature characteristic.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: January 9, 2018
    Assignee: Northrop Grumman Systems Corporation
    Inventor: Edward Chan
  • Patent number: 9799938
    Abstract: A cavity filter includes a threaded resonator and a threaded filter body to improve the coupling of radio frequency signals.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: October 24, 2017
    Assignee: Alcatel-Lucent Shanghai Bell Co., Ltd
    Inventors: Yin-Shing Chong, Peter A. Casey, Yunchi Zhang
  • Patent number: 9614264
    Abstract: The present invention provides multi-resonator cavity filters in which one or more patch elements are introduced into the coupling apertures between resonators, reducing the strength of the electric field in the aperture gap while maintaining the coupling strength from resonator to resonator. This reduced field strength reduces the sensitivity of the resonators to gap-thickness variations, and allows use of the filter in high-power applications.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: April 4, 2017
    Assignee: MesaplexxPty Ltd
    Inventors: David R. Hendry, Steven J. Cooper, Peter B. Kenington
  • Patent number: 9466864
    Abstract: An RF duplexer waveguide filter module for the transmission and filtering of TX and RX RF signals comprising a substrate with TX and RX filter assemblies mounted thereon. One or both of the TX and RX filter assemblies comprises an RF waveguide filter assembly including a plurality of blocks of dielectric material coupled together in a side-by-side relationship. Each of the blocks of dielectric material defines at least one slit and at least one internal RF signal transmission window. One or both of the end blocks defines a step and a through-hole terminating in an opening in the step. In one embodiment, the RF duplexer waveguide filter module additionally comprises an RF antenna waveguide filter extending between and coupling the TX and RX filter assemblies to an antenna RF signal transmission line.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: October 11, 2016
    Assignee: CTS Corporation
    Inventors: Alexandre Rogozine, Reddy Vangala, Nam Phan
  • Patent number: 9343792
    Abstract: A band-pass filter for microwave is provided that can be frequency-tuned the filter comprising an input resonator comprising a metal input cavity and an input dielectric element, an output resonator comprising a metal output cavity and an output dielectric element, an input excitation means (S1) of elongate shape, an output excitation means of elongate shape, the input resonator and the output resonator being coupled, characterized in that the input dielectric element and the output dielectric element have a recess, the input excitation means penetrates the recess of the input dielectric element the output excitation means penetrates the recess of the output dielectric element, the input dielectric element is capable of carrying out a rotation about an input rotation axis, the rotations of the dielectric elements allowing the modification of the central frequency of the filter.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: May 17, 2016
    Assignees: Thales, Centre National de Recherche Scientifique—CNRS, Centre National d'Etudes Spatiales—CNES
    Inventors: Aurelien Perigaud, Damien Pacaud, Nicolas Delhote, Olivier Tantot, Stephane Bila, Serge Verdeyme, Laetitia Estagerie
  • Patent number: 9263785
    Abstract: The present invention relates to a waveguide tuning device (1) arranged for mounting in a waveguide structure (2) which has a longitudinal extension (L) and comprises a first inner wall (3), a second inner wall (4), a third inner wall (5) and a fourth inner wall. The inner walls are arranged such that a rectangular cross-section is obtained for the waveguide structure. The first inner wall (3) and the second inner wall (4) have a first length (b) and are facing each other. The third inner wall (5) and the fourth inner wall (6) have a second length (a) and are facing each other. The electrical field (E) is parallel to the main surfaces of the first inner wall (3) and the second inner wall (4). The tuning device (1) is electrically controllable and arranged for mounting at the first inner wall (3) and/or the second inner wall (4). The present invention also relates to a tunable waveguide structure.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: February 16, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Per Ligander, Simone Bastioli, Luca Pelliccia, Ove Persson, Roberto Sorrentino
  • Patent number: 9099787
    Abstract: A microwave antenna comprises an antenna array comprising a plurality of antenna elements. An antenna element comprises a cover, a hollow waveguide formed within the cover for guiding microwave radiation at an operating frequency between a first open end portion and a second end portion arranged opposite the first end portion, a septum arranged centrally and along the longitudinal direction within the waveguide and separating said waveguide into two waveguide portions, a substrate arrangement arranged at the second end portion within the cover, said substrate arrangement comprising a ground plane and line structures arranged on both sides of and at a distance from said ground plane and a substrate integrated waveguide, a waveguide transition arranged between said hollow waveguide and said substrate integrated waveguide, an integrated circuit arranged within said cover and electrically contacted to said ground plane and said line structures, and terminals electrically contacted to said integrated circuit.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: August 4, 2015
    Assignee: Sony Corporation
    Inventor: Marcel Blech
  • Patent number: 9030278
    Abstract: A method of tuning the frequency of a waveguide filter including the step of removing dielectric material from one or both of the first and second opposed exterior side surfaces of the waveguide filter to cause a change in the center frequency of the waveguide filter. In one embodiment, dielectric material is removed from one or both of the first and second opposed exterior side surfaces of the waveguide filter in unequal amounts wherein the tuned waveguide filter includes first and second slits defined in the respective first and second opposed exterior side surfaces which extend unequal first and second distances into the body of the waveguide filter.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: May 12, 2015
    Assignee: CTS Corporation
    Inventor: Reddy R. Vangala
  • Patent number: 9024705
    Abstract: A cavity filter having two series of resonance chambers bilaterally connected between an antenna port and two opposing signal input/output ports in a resonant space therein, each series of resonance chambers having the last resonance chamber thereof connected to the antenna port and the first resonance chamber thereof connected to the respective signal input/output port and kept in communication with the associating last resonance chamber through one respective channel and the second resonance chamber thereof kept in communication with the last second resonance chamber thereof through one respective channel to provide cross-coupling feedback, getting better stop-band flatness and improving signal quality.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: May 5, 2015
    Assignee: Universal Microwave Technology, Inc.
    Inventors: Wei Cheng, Wei-Hong Hsu, Tsung-Han Chang
  • Publication number: 20150116057
    Abstract: An apparatus to filter electromagnetic waves includes a cavity and one or more tuning circuits. The cavity is configured to receive the electromagnetic waves and has a resonant frequency. The one or more tuning circuits are disposed proximate to or in the cavity. The one or more tuning circuits and the cavity are configured to filter the electromagnetic waves and the resonant frequency of the cavity is based on the one or more tuning circuits.
    Type: Application
    Filed: August 5, 2014
    Publication date: April 30, 2015
    Applicant: Futurewei Technologies, Inc.
    Inventor: Vahid Miraftab
  • Patent number: 8988171
    Abstract: A bandpass filter of the present invention includes: rectangular waveguides which are divided into two in a center of a broad plane; and a metal plate which has a substantially ladder shape, is disposed between the rectangular waveguides in parallel with a narrow plane of the rectangular waveguides, and has a pair of beams and plurality of fins that connect the pair of beams. At least one other waveguide is formed by dividing a waveguide path within the rectangular waveguides vertically with respect to a direction which is parallel with the broad plane. At least three resonators are formed within the rectangular waveguides by the metal plate, and each of the other waveguides couples resonators together which crosses at least one of the plurality of resonators so as to form a pole outside a pass band.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: March 24, 2015
    Assignee: NEC Corporation
    Inventor: Takafumi Kai
  • Patent number: 8975985
    Abstract: A frequency-tunable microwave bandpass filter including a wave guide having a rectangular cross-section and including a stationary first conductive portion I and a movable second conductive portion II. The first portion includes first conductive partitions having one or more conductive obstacles related to complementary openings in the section of the guide that forms capacitive irises. The first partitions are transversely mounted, at the propagation of the wave in the guide, define cavities in the longitudinal direction of the guide, are rigidly connected to the first portion and the second conductive partitions that have one or more openings defining capacitive irises, and, in combination with the adjacent guide lengths, form immitance inverters. The first partitions form a series of resonating cavities coupled by the immitance inverters. A means ensures electrical contact between the conductive portions I and II.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: March 10, 2015
    Assignee: Thales
    Inventor: Bernard Meuriche
  • Patent number: 8928433
    Abstract: A waveguide filter comprises a dielectric board on at least one of the two E-planes of a rectangular waveguide. The dielectric board comprises a conductive pattern formed on one surface thereof and having a slit extending in a signal propagation direction, and a ground pattern formed on the other surface.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: January 6, 2015
    Assignee: NEC Corporation
    Inventor: Taketoshi Jinnai
  • Patent number: 8912867
    Abstract: A waveguide filter, comprising a housing defining a passage through which electromagnetic waves can travel and a plurality of adjustable projections extending through the housing into the passage. The passage is absent any fixed protrusions. The plurality of adjustable projection s comprises a set of coupling projections, wherein each pair of adjacent coupling projections in the set of coupling projections defines there between a resonant cavity. Each coupling projection in the set of coupling projections acts as a coupling element for at least one resonant cavity and is adjustable for trimming the coupling of that at least one resonant cavity. The plurality of adjustable projections further comprises a set of tuning projections, wherein a tuning projection from the set of tuning projections is positioned between each pair of adjacent coupling projections and is adjustable for trimming a resonance frequency of an associated resonant cavity.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: December 16, 2014
    Assignee: Apollo Microwaves, Ltd.
    Inventor: Giuseppe Frenna
  • Publication number: 20140361853
    Abstract: A structure and method for adjusting the bandwidth of a ceramic waveguide filter comprising, in one embodiment, a monoblock of dielectric ceramic material defining respective steps and respective input/output through-holes extending through the monoblock and the respective steps. In one embodiment, the steps are defined by notches in the monoblock and the input/output through-holes define openings terminating in the notch. The bandwidth of the ceramic waveguide filter may be adjusted by adjusting the height/thickness and direction of the steps relative to an exterior surface of the monoblock and/or the diameter of the input/output through-holes.
    Type: Application
    Filed: August 25, 2014
    Publication date: December 11, 2014
    Applicant: CTS CORPORATION
    Inventor: Reddy Vangala
  • Patent number: 8878635
    Abstract: A tunable band-pass filter includes: a rectangular waveguide including a first and a second waveguide parts, which are acquired by dividing the rectangular waveguide along an E-plane of the rectangular waveguide at a center position of an H-plane in the rectangular waveguide; a metal plate sandwiched by the first and the second waveguide parts in such a way as to be parallel to the E-plane; at least one dielectric plate arranged in the rectangular waveguide in such a way as to extend in a longitudinal extension direction of the metal plate; and a drive mechanism changing a relative position relationship between the dielectric plate and the metal plate from the outside.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: November 4, 2014
    Assignee: NEC Corporation
    Inventors: Takahiro Miyamoto, Sumio Ueda
  • Publication number: 20140263179
    Abstract: A system includes a tuning element comprising a shaft and a tuning stub. The tuning stub includes a surface with a center point. The shaft is connected to the surface of the tuning stub at a location that is offset from the center point. A waveguide includes an opening into an inner portion of the waveguide. The shaft passes through the opening and the tuning stub is arranged in the inner portion of the waveguide. A first actuator selectively rotates the shaft.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Lam Research Corporation
    Inventors: Carlo Waldfried, Orlando Escorcia, William Hansen
  • Patent number: 8797126
    Abstract: The present invention relates to a tunable microwave arrangement (100) comprising a waveguide arrangement and tuning elements comprising a number of varactors for tuning an electromagnetic signal input to the waveguide arrangement. It comprises a substrate (1), a layered structure (20) comprising at least two conducting layers (2,3) and at least one dielectric layer (4) which are arranged in an alternating manner. The layered structure is arranged on the substrate (1) such that a first of said conducting layers (2) is closest to the substrate (1). It also comprises at least one surface mounted waveguide (5), a second of the conducting layers (3), most distant from the substrate, being adapted to form a wall of the surface mounted waveguide (5), which wall incorporates said tuning elements which are arranged to enable control of surface currents generated in said wall, hence loading the waveguide (5) with a tunable, controllable impedance.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: August 5, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Spartak Gevorgyan, Anatoli Deleniv, Thomas Lewin, Per Ligander
  • Publication number: 20140210573
    Abstract: A filter includes a case, a number of resonant columns received in the case, a partition walls received in the case and located between the adjacent resonant columns, a number of blend strips fastened on the partition walls, and a cover covering on the case. The cover defines a number of regulating through hole corresponding to the resonant columns and the blend strips and includes a number of regulating bolts passing through the regulating through hole to couple with the resonant columns and the blend strips. The regulating bolts move upwards and downwards in the regulating through holes to regulate a transmission zero of the filter.
    Type: Application
    Filed: January 22, 2014
    Publication date: July 31, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: RUEI-YUN HUNG
  • Patent number: 8648676
    Abstract: A method and an apparatus are provided for providing a tunable substrate integrated waveguide (SIW) for which a parameter of at least some element or portion thereof may be altered or varied to alter the propagation of a signal propagating through the SIW thereby achieving a tunable SIW. In some embodiments a plurality of capacitively variably loaded transverse slots achieve the tunability for the SIW.
    Type: Grant
    Filed: May 6, 2011
    Date of Patent: February 11, 2014
    Assignee: The Royal Institution for the Advancement of Learning/McGill University
    Inventors: Ramesh Abhari, Kasra Payandehjoo, Asanee Suntives
  • Publication number: 20140015626
    Abstract: A millimeter waveband filter is provided with a resonator formed by a pair of electric wave half mirrors in a transmission line of a waveguide allowing electromagnetic waves in a predetermined frequency range of a millimeter waveband to propagate in a TE10 mode, and allows frequency components centering on the resonance frequency of the resonator to pass therethrough. A high-pass filter which has a transmission line reduced in size so as to have a cutoff frequency matching an upper limit of a lower rejection band of a filter passband is formed in a transmission line between the end of the waveguide and the electric wave half mirror, thereby increasing the attenuation of the lower rejection band.
    Type: Application
    Filed: June 26, 2013
    Publication date: January 16, 2014
    Inventors: Takashi Kawamura, Akihito Otani
  • Patent number: 8598969
    Abstract: The present invention is directed to a piezo-electrically actuated membrane (ex.—a tuner) configured for use with a tunable cavity filter. The piezo-electrically actuated tuner may be formed of printed circuit board materials and may be placed over the cavities of the tunable cavity filter. Further, the piezo-electrically actuated tuner may promote high level performance of the tunable cavity filter, while allowing the tunable cavity filter to be tunable across wide bands.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: December 3, 2013
    Assignee: Rockwell Collins, Inc.
    Inventors: Anders P. Walker, Thomas J. Journot, Todd A. Freeman, John C. Mather, Jonathan A. Lovseth
  • Publication number: 20130314179
    Abstract: A transmission line which allows electromagnetic waves in a predetermined frequency range of a millimeter waveband to propagate in a TE10 models formed by a first waveguide and a second waveguide. A resonator is formed by electric wave half mirrors fixed to the first waveguide and the second waveguide. The second waveguide has a structure in which a first transmission line forming body has a plate shape and has a square hole forming the first transmission line formed to pass therethrough from one surface toward an opposite surface, a second transmission line forming body has a plate shape and has a square hole forming the second transmission line formed to pass therethrough from one surface toward an opposite surface, and the first transmission line forming body and the second transmission line forming body are connectable and separable.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 28, 2013
    Applicant: ANRITSU CORPORATION
    Inventors: Takashi Kawamura, Akihito Otani, Hiroshi Hasegawa
  • Publication number: 20130169384
    Abstract: A frequency-tunable microwave bandpass filter including a wave guide having a rectangular cross-section and including a stationary first conductive portion I and a movable second conductive portion II. The first portion includes first conductive partitions having one or more conductive obstacles related to complementary openings in the section of the guide that forms capacitive irises. The first partitions are transversely mounted, at the propagation of the wave in the guide, define cavities in the longitudinal direction of the guide, are rigidly connected to the first portion and the second conductive partitions that have one or more openings defining capacitive irises, and, in combination with the adjacent guide lengths, form immitance inverters. The first partitions form a series of resonating cavities coupled by the immitance inverters. A means ensures electrical contact between the conductive portions I and II.
    Type: Application
    Filed: December 17, 2010
    Publication date: July 4, 2013
    Applicant: THALES
    Inventor: Bernard Meuriche
  • Publication number: 20130135063
    Abstract: The millimeter waveband filter includes: a transmission line that is formed by a waveguide which propagates electromagnetic waves with a predetermined frequency range of a millimeter waveband from one end to the other end in a TE10 mode; and a pair of radio-wave half mirrors that are disposed opposite each other with a space interposed therebetween so as to block the inside of the transmission line and have planar shapes and a characteristic of transmitting a part of the electromagnetic waves with the predetermined frequency range and reflecting a part thereof. In the electromagnetic waves incident from the one end side of the transmission line, a frequency component centered on a resonant frequency of a resonator, which is formed between the pair of radio-wave half mirrors, is selectively output from the other end of the transmission line.
    Type: Application
    Filed: November 27, 2012
    Publication date: May 30, 2013
    Applicant: ANRITSU CORPORATION
    Inventor: Anritsu Corporation
  • Publication number: 20130135064
    Abstract: The present invention relates to a waveguide tuning device (1) arranged for mounting in a waveguide structure (2) which has a longitudinal extension (L) and comprises a fist inner wall (3), a second inner wall (4), a third inner wall (5) and a fourth inner wall. The inner walls are arranged such that a rectangular cross-section is obtained for the waveguide structure. The first inner wall (3) and the second inner wall (4) have a first length (b) and are facing each other. The third inner wall (5) and the fourth inner wall (6) have a second length (a) and are facing each other. The electrical field (E) is parallel to the main surfaces of the first inner wall (3) and the second inner wall (4). The tuning device (1) is electrically controllable and arranged for mounting at the first inner wall (3) and/or the second inner wall (4). The present invention also relates to a tunable waveguide structure.
    Type: Application
    Filed: August 2, 2010
    Publication date: May 30, 2013
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Per Ligander, Simone Bastioli, Luca Pelliccia, Ove Persson, Roberto Sorrentino
  • Publication number: 20130113578
    Abstract: A method for manufacturing a resonance tube includes: mixing powder materials, to form homogeneous powder particles, where the powder materials comprise iron powder with a weight proportion of 50% to 90%, at least one of copper powder and steel powder with a weight proportion of 1% to 30%, and an auxiliary material with a weight proportion of 1% to 20%; pressing and molding the powder particles, to form a resonance tube roughcast; sintering the resonance tube roughcast in a protective atmosphere, to form a resonance tube semi-finished product; and electroplating the resonance tube semi-finished product, to form the resonance tube. In the method, the resonance tube, and the filter according to embodiments of the present invention, the resonance tube is manufactured by using multiple powder materials.
    Type: Application
    Filed: December 27, 2012
    Publication date: May 9, 2013
    Applicant: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Huawei Technologies Co., Ltd.
  • Publication number: 20120293283
    Abstract: A method of tuning the frequency of a waveguide filter including the step of removing dielectric material from one or both of the first and second opposed exterior side surfaces of the waveguide filter to cause a change in the center frequency of the waveguide filter. In one embodiment, dielectric material is removed from one or both of the first and second opposed exterior side surfaces of the waveguide filter in unequal amounts wherein the tuned waveguide filter includes first and second slits defined in the respective first and second opposed exterior side surfaces which extend unequal first and second distances into the body of the waveguide filter.
    Type: Application
    Filed: August 2, 2012
    Publication date: November 22, 2012
    Applicant: CTS CORPORATION
    Inventor: Reddy Vangala
  • Publication number: 20120293282
    Abstract: A waveguide filter, comprising a housing defining a passage through which electromagnetic waves can travel and a plurality of adjustable projections extending through the housing into the passage. The passage is absent any fixed protrusions. The plurality of adjustable projection s comprises a set of coupling projections, wherein each pair of adjacent coupling projections in the set of coupling projections defines there between a resonant cavity. Each coupling projection in the set of coupling projections acts as a coupling element for at least one resonant cavity and is adjustable for trimming the coupling of that at least one resonant cavity. The plurality of adjustable projections further comprises a set of tuning projections, wherein a tuning projection from the set of tuning projections is positioned between each pair of adjacent coupling projections and is adjustable for trimming a resonance frequency of an associated resonant cavity.
    Type: Application
    Filed: December 14, 2011
    Publication date: November 22, 2012
    Inventor: Giuseppe Frenna
  • Publication number: 20120280770
    Abstract: A method and an apparatus are provided for providing a tunable substrate integrated waveguide (SIW) for which a parameter of at least some element or portion thereof may be altered or varied to alter the propagation of a signal propagating through the SIW thereby achieving a tunable SIW. In some embodiments a plurality of capacitively variably loaded transverse slots achieve the tunability for the SIW.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 8, 2012
    Applicant: The Royal Institution for the Advancement of Learning/McGill University
    Inventors: Ramesh Abhari, Kasra Payandehjoo, Asanee Suntives
  • Publication number: 20120256708
    Abstract: A millimeter wave transmission line filter having a plurality of filter pole determining coupled cavities fabricated with a multiple lithographic layer micro-machining process. The filter cavities are oriented perpendicular to an underlying substrate element in order to achieve micromachining, fabrication and accuracy advantages. Multiple filters can be used in a frequency multiplex arrangement as in a duplexer. Radio frequencies in the 15 to 300 gigahertz range are contemplated.
    Type: Application
    Filed: June 25, 2012
    Publication date: October 11, 2012
    Applicant: Government of the United States, as represented by the Secretary of the Air Force
    Inventor: J. Robert Reid, JR.
  • Patent number: 8217737
    Abstract: Various exemplary embodiments relate to an improved coupler for resonant cavities and dielectric resonators. The coupler may permit accurate tuning of electromagnetic signals within desired frequency ranges. The coupler may be secured to a movable tuning device by a plurality of securing members. Each securing member may be separate, having no contact with any other securing member.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: July 10, 2012
    Assignee: Alcatel Lucent
    Inventors: Raja K Reddy, Peter A Casey
  • Publication number: 20120161905
    Abstract: Provided are a resonant element and resonator filter with a frequency tunable layer structure and a method of tuning a frequency of a resonator filter. A resonant element with a frequency-tunable layer structure includes a waveguide layer through which an electric wave is transmitted, a frequency adjustment layer positioned on at least one of an upper layer and a lower layer of the waveguide layer, and configured to change at least one of a height and a structure of the resonant element, and an outer layer positioned outwardly from the waveguide layer and the frequency adjustment layer, and constituting an external structure of the resonant element. Consequently, it is possible to reduce economic and temporal waste caused by remanufacturing a resonator filter because the frequency characteristics of the manufactured resonator filter do not coincide with designed frequency characteristics.
    Type: Application
    Filed: November 11, 2011
    Publication date: June 28, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Won Hui LEE, Tae Jin CHUNG
  • Publication number: 20120126914
    Abstract: A tunable band-pass filter includes: a rectangular waveguide including a first and a second waveguide parts, which are acquired by dividing the rectangular waveguide along an E-plane of the rectangular waveguide at a center position of an H-plane in the rectangular waveguide; a metal plate sandwiched by the first and the second waveguide parts in such a way as to be parallel to the E-plane; at least one dielectric plate arranged in the rectangular waveguide in such a way as to extend in a longitudinal extension direction of the metal plate; and a drive mechanism changing a relative position relationship between the dielectric plate and the metal plate from the outside.
    Type: Application
    Filed: June 23, 2010
    Publication date: May 24, 2012
    Inventors: Takahiro Miyamoto, Sumio Ueda
  • Publication number: 20120105176
    Abstract: The invention relates to an improved HF cavity filter characterized by the following features: the housing cover (17) is made of a circuit board (21); the at least one additional hole (29) is made in the circuit board (21), in which a tuning bushing soldered at the outer circumference to an electrically conductive layer (25) on the circuit board is inserted; the tuning element (37) can be threaded to a varying depth into the tuning bushing (31); at least one electrically conductive structure is implemented on the circuit board (21); and the dielectric conductive structure comprises at least one conductor and/or at least one SMT component and/or at least one HF overcoupling device.
    Type: Application
    Filed: June 3, 2010
    Publication date: May 3, 2012
    Applicant: Kathrein-Austria Ges M.B.H.
    Inventor: Thomas Kapfinger
  • Patent number: 8149073
    Abstract: A band-pass filter includes a photonic crystal having a local mode that generates a pass band in a stop band formed by Bragg reflection, a transmission channel that limits electromagnetic waves propagating in the photonic crystal to a mode in which an amplitude direction of an electrical field is a particular direction; and a magnetic field-applying unit for applying to the photonic crystal a DC magnetic field in a direction perpendicular to a propagation direction of the electromagnetic waves. The photonic crystal includes a periodic structure including a low permittivity dielectric member and a plurality of high permittivity dielectric members periodically arranged in the low permittivity dielectric member so that the Bragg reflection occurs in the periodic structure, and a magnetic member disposed in the periodic structure.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: April 3, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Takuji Nakagawa
  • Publication number: 20120049982
    Abstract: An RF cavity filter is disclosed. The disclosed filter includes: a housing having at least one cavity defined; a cover coupled to an upper portion of the housing; at least one resonator contained within the at least one cavity; at least one hole formed in the cover; at least one grounding bolt configured to be inserted into the hole, having a screw thread formed on a part of an outer perimeter, and having a center hole in a center portion; and at least one tuning bolt inserted into the housing through the center hole along a screw thread formed on an inner perimeter of the center hole, where the grounding bolt has a flange part formed on a lower portion that is in contact with the tuning bolt and a lower portion of the cover.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 1, 2012
    Applicant: ACE TECHNOLOGIES CORPORATION
    Inventor: Seung-Cheol Lee
  • Publication number: 20120019339
    Abstract: A dielectric resonator filter comprising a metal wall (11) that is configured with metal cavities. Dielectric resonators (12, 14, 15) and (16) can be placed in the metal cavities and configured as a set of cylindrical TE mode resonators (12) and (14) and a set of rectangular HE mode resonators (15) and (16). Separating walls (13) are disposed between the dielectric resonators (12, 14, 15) and (16), which include tunable irises (17) for electromagnetic mixed coupling between the cylindrical TE mode resonators (12) and (14) and the rectangular HE mode resonators (15) and (16). The rectangular HE mode resonators (15) and (16) are configured to push far up the TE mode in frequency. This leads to an easy separation of two degenerate HE modes, a wide spurious free stop band and also achieves electric coupling without using any additional coupling member.
    Type: Application
    Filed: March 31, 2009
    Publication date: January 26, 2012
    Applicant: INDIAN SPACE RESEARCH ORGANISATION
    Inventors: Singh Surinder, Soni Shilpi
  • Patent number: 8072294
    Abstract: The filter has a switch function of selectively transmitting a transmission signal through one of first and second branch waveguides branching from a primary waveguide. The filter includes resonators disposed in the first and second branch waveguides. The resonator includes a space formed inside a metal cover, a central conductor disposed inside the space, and a short-circuiting plate. The central conductor has one end grounded to an outer conductor. The short-circuiting plate allows the neighborhood of an open end of the central conductor to be selectively conducted to the outer conductor. The filter performs a selection from the first and second branch waveguides by switching electrical conductivity in a region between the neighborhood of the open end of the central conductor and the outer conductor.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: December 6, 2011
    Assignees: NEC Corporation, NEC Engineering, Ltd.
    Inventors: Hiroshi Tanpo, Tsuyoshi Hamada
  • Publication number: 20110279200
    Abstract: A structure and method for adjusting the bandwidth of a ceramic waveguide filter comprising, in one embodiment, a monoblock of dielectric ceramic material defining respective steps and respective input/output through-holes extending through the monoblock and the respective steps. In one embodiment, the steps are defined by notches in the monoblock and the input/output through-holes define openings terminating in the notch. The bandwidth of the ceramic waveguide filter may be adjusted by adjusting the height/thickness and direction of the steps relative to an exterior surface of the monoblock and/or the diameter of the input/output through-holes.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 17, 2011
    Inventor: Reddy Vangala
  • Publication number: 20110241802
    Abstract: A tunable filter having an electronically tunable center frequency and dynamic bandwidth control over a large tuning range. High-Q continuously tunable evanescent-mode cavity resonators and filters using reliable RF MEMS actuators. One embodiment is a 3.4-6.2 GHz (1.8:1 tuning ratio) continuously tunable electrostatic MEMS resonator with quality factor of 460-530, with a volume of 18×30×4 mm including the actuation scheme and biasing lines. A tunable resonators is also disclosed with a 2.8:1 (5.0-1.9 GHz) tuning ratio, and Q of 300-650.
    Type: Application
    Filed: October 3, 2009
    Publication date: October 6, 2011
    Inventors: Himanshu Joshi, Hjalti Hreinn Sigmarsson, Dimitrios Peroulis, William J. Chappell, Xiaoguang Liu
  • Publication number: 20110133861
    Abstract: A tunable filter for expanding tuning range includes: a housing, which has multiple cavities defined by partitions; a resonator contained in the cavity; at least one sliding member installed over the resonator; a main cover coupled to an upper portion of the housing; and at least one tuning element coupled to a lower portion of the sliding member and made of a metallic material. Tuning is accomplished by a sliding motion of the sliding member, and the resonator includes a cylindrical first conductor and a second conductor coupled to an upper portion of the cylindrical conductor, where a cross section of the second conductor is shaped as a circle with a portion removed such that an area of overlap between the tuning element and the second conductor is varied according to a sliding of the tuning element.
    Type: Application
    Filed: August 7, 2009
    Publication date: June 9, 2011
    Inventors: Dong-Wan Chun, Jae-Ok Seo, Kwang-Sun Park
  • Publication number: 20110133862
    Abstract: A tunable filter for enabling the adjustment of tuning characteristics includes: a housing, in which multiple cavities are defined by partitions; a resonator contained in the cavity; at least one sliding member installed over the resonator; a main cover coupled to an upper portion of the housing; and at least one tuning element coupled to a lower portion of the sliding member and made of a metallic material. The tuning element is coupled to the sliding member by a rotatable bolt, and the bolt is coupled to the tuning element at a point that is a particular distance away from a center of the tuning element. The tunable filter using a sliding system according to certain embodiments of the present invention has the advantage of enabling adjustment of tuning characteristics by way of the rotation of the tuning element, and accordingly, can be used adaptively in various environments.
    Type: Application
    Filed: August 7, 2009
    Publication date: June 9, 2011
    Inventors: Dong-Wan Chun, Kwang-Sun Park
  • Publication number: 20110084783
    Abstract: A waveguide filter comprises a dielectric board on at least one of the two E-planes of a rectangular waveguide. The dielectric board comprises a conductive pattern formed on one surface thereof and having a slit extending in a signal propagation direction, and a ground pattern formed on the other surface.
    Type: Application
    Filed: June 18, 2009
    Publication date: April 14, 2011
    Inventor: Taketoshi Jinnai
  • Publication number: 20110001585
    Abstract: A tuneable filter comprising a filter body defining a tuning cavity; a tuning member within the tuning cavity; and, a linear actuator adapted to displace the tuning member within the cavity to tune the filter; the linear actuator comprising a motor; a drive arm connected to the motor and extending along a drive axis, the drive arm being adapted to be rotated about the drive axis by the motor; an extension arm extending along the drive axis being connected at one end to the tuning member and being in engagement with the drive arm at the other end; the engagement between the drive arm and extension arm being arranged such that rotation of the drive arm about the drive axis displaces the extension arm along the drive axis; each of the drive arm and extension arm comprising an end stop, the end stops being arranged such that as the extension arm reaches the end of its range of travel towards the drive arm the drive arm end stop rotates into abutment with the extension arm end stop, preventing further rotation of
    Type: Application
    Filed: August 5, 2008
    Publication date: January 6, 2011
    Inventors: John David Rhodes, Andrew James Panks, Christopher Ian Mobbs
  • Publication number: 20100315180
    Abstract: The present invention relates to a flexible cap system optimized for thermally-compensated technology microwave resonators. More specifically, this invention proposes a multiple-membrane flexible wall system for thermally-compensated filters and OMUX. The use of a multi-membrane flexible wall, in particular as sealing cap for a resonant cavity of an OMUX channel, makes it possible: to reduce the thermal resistance of the flexible wall, while maintaining an equivalent level of mechanical stresses exerted on said wall for a given displacement; or to reduce the mechanical stresses exerted on the flexible wall for a given displacement, while maintaining one and the same thermal resistance for said wall; or to increase the deformation of the flexible wall by maintaining an equivalent level of mechanical stresses and by maintaining an equivalent thermal resistance.
    Type: Application
    Filed: May 12, 2010
    Publication date: December 16, 2010
    Applicant: THales
    Inventors: Joël Lagorsse, Michel Blanquet, Emmanuel Hayard