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| Number | Title | Issue Date |
| 8130063 | Waveguide filter A waveguide bandpass filter for use in microwave and millimeter-wave satellite communications equipment is presented. The filter is based on a substrate integrated waveguide (SIW) having several cascaded oversized SIW cavities. The filter is implemented in a printed... | 03/06/2012 |
| 8008997 | Printed circuit board filter having rows of vias defining a quasi cavity that is below a cutoff frequency A low frequency reject filter element is formed on a printed circuit board that utilizes the fact that power transmission in a waveguide is cut-off below a certain frequency. A quasi waveguide cavity is formed in printed circuit board using the top and bottom ground... | 08/30/2011 |
| 7898368 | Filter unit A filter unit comprises a cover and a base. The cover includes a number of first grooves, and the base includes a number of second grooves aligned with the first grooves. At least one of the cover or the base includes an alloy of zinc and aluminum, wherein the weigh... | 03/01/2011 |
| 7872550 | Vertical coupling structure for non-adjacent resonators A vertical coupling structure for non-adjacent resonators is provided. The vertical coupling structure has a first resonator and a second resonator. At least one side of the first resonator is formed as a first bent extension structure, and the first bent extension ... | 01/18/2011 |
| 7786828 | Waveguide bandstop filter In a bandstop filter having an input port (2; 3), an output port (3; 2) and a waveguide (1, 1′) connecting the two ports, at least one resonator body (4, 5; 4′ 5) is located in the waveguide (1, 1′), which resonator body has ... | 08/31/2010 |
| 7760053 | Negative refractive index and opto-magnetic materials and method of fabricating same One-dimensional, two-dimensional and three-dimensional negative refractive index (NRI) and/or opto-magnetic materials operating in spectral ranges spanning from the visible to far IR wavelength ranges is disclosed. Said materials are comprised of metal or metal/diel... | 07/20/2010 |
| RE40890 | Temperature compensated high power bandpass filter A bandpass filter makes use of at least one waveguide cavity that is thermally compensated to minimize drift of a resonant frequency of the cavity with thermal expansion of cavity components. The compensation relies on deformation of the shape of at least one cavity... | 09/01/2009 |
| 7538640 | Waveguide and attenuation pole waveguide bandpass filter A waveguide and an attenuation pole waveguide bandpass filter with a simple structure without any additional structure such as a negative cross coupling between resonators. The attenuation pole waveguide bandpass filter arranged at right angle to the longitud... | 05/26/2009 |
| 7439829 | RF module The present invention provides an RF module capable of converting electromagnetic waves in the TE mode to balanced electromagnetic waves in the TEM mode without adjustment and outputting the balanced electromagnetic waves while easily realizing miniaturization. The ... | 10/21/2008 |
| 7403085 | RF module The present invention provides an RF module capable of outputting balanced electromagnetic waves without requiring adjustment and easily realizing miniaturization. The RF module includes: a waveguide (3) having an area which is surrounded by a pair of ground ... | 07/22/2008 |
| 7397331 | Coupling structure, resonator excitation structure and filter for coplanar-waveguide circuit A coupling structure for coupling to a circuit portion (6) in a coplanar-waveguide circuit (1) having ground conductors (2, 3) at both sides is disclosed. A signal input/output line (4) is provided at the center of the coplanar-waveguide ... | 07/08/2008 |
| 7391287 | Bandpass filter with pseudo-elliptic response The invention proposes an H-plane filter with inductive irises which exhibits a quasi-elliptic response while retaining the same compactness as a filter having a Chebyshev response. The invention furthermore makes it possible to use a large number of transmission ze... | 06/24/2008 |
| 7385460 | Combined electrostatic and optical waveguide based microfluidic chip systems and methods A system for detecting interactions between charged targets and analytes. The system includes a fluid channel, and a waveguide associated with the fluid channel. A detection region is associated with the waveguide, and a biasing element is operatively coupled to the... | 06/10/2008 |
| 7358834 | Transmission line voltage controlled nonlinear signal processors Waveguide nonlinear signal processors include transmission lines defined on a substrate. A plurality of varactors or pairs of varactors are situated along the transmission line and are in communication with a signal conductor of the transmission line and one or more... | 04/15/2008 |
| 7355496 | Finline type microwave band-pass filter The present invention relates to a FINLINE type microwave band-pass filter comprising a waveguide provided with an insulating substrate placed in an E plane of the guide and comprising on at least one of the surfaces, conductive inserts electrically connected to the... | 04/08/2008 |
| 7352263 | Method and mechanism for tuning dielectric resonator circuits The invention comprises a technique and associated mechanisms by which dielectric resonator circuits, such as filters, can be tuned in both frequency, bandwidth or both without the need for irises, tuning screws and/or tuning plates. In accordance with the invention... | 04/01/2008 |
| 7352264 | Electronically tunable dielectric resonator circuits In order to permit electronic tuning of the frequency of a circuit including dielectric resonators, such as a dielectric resonator filter, tuning plates are employed adjacent the individual dielectric resonators. The tuning plates comprises two separate conductive p... | 04/01/2008 |
| 7348864 | Integrated MMIC modules for millimeter and submillimeter wave system applications An integrated circuit module comprising integrated coupling transmission structures protruding from the main body of the integrated circuit with extra substrate material removed around and/or under the coupling transmission structures. ... | 03/25/2008 |
| 7332988 | Frequency filter and its manufacturing process The invention relates to a frequency filter including a structure with, on one face, two extreme evanescent areas and at least one wave guide area between the evanescent areas. The at least one wave guide area and the evanescent areas form a single closed cavity. Th... | 02/19/2008 |
| 7323954 | Dielectric ceramic filter with metal guide-can A dielectric ceramic filter with a metal guide can is provided. The dielectric ceramic filter includes a metal guide can coupled to and projecting from both input/output ends of the dielectric ceramic filter. Alternatively, the dielectric ceramic filter includes: a ... | 01/29/2008 |
| 7308749 | Production method for dielectric resonator device A method of forming a dielectric resonator from an inner-conductor-formed hole that has a substantially rectangular or substantially elliptical cross section in a direction perpendicular to the depth direction thereof, by placing a rotary cutting disk in contact wit... | 12/18/2007 |
| 7310031 | Dielectric resonators and circuits made therefrom A dielectric resonator having variable cross-section, preferably varying monotonically, and, most preferably, the resonator being in the shape of a truncated cone. Such shapes displace the H11 mode from the TE mode in the longitudinal direction of the con... | 12/18/2007 |
| 7304554 | U-shaped microwave and millimeter wave resonator filter A filter including a body on which a waveguide groove, whose one surface is open, is formed in a U-shape and a plurarity of inductive resonant windows are provided along a longitudinal direction of the waveguide groove at a predetermined interval in the waveguide gr... | 12/04/2007 |
| 7299534 | Method of fabrication of low-loss filter and frequency multiplexer A method of fabricating a waveguide filter includes forming a monolithic polymeric dielectric core configured for fabricating a dielectric-filled cavity, where the core includes a plurality of spaced-apart depressions; applying a layer of conducting metal to an oute... | 11/27/2007 |
| 7298232 | Low-loss filter and frequency multiplexer A waveguide filter with a signal input port at a first end and a signal output port at a second end includes a dielectric core of moldable material where the outer surface of its periphery has a metal layer with nonmetallized openings positioned at opposite ends of ... | 11/20/2007 |
| 7292123 | Waveguide E-plane RF bandpass filter with pseudo-elliptic response The invention relates to RF bandpass filters with pseudo-elliptic response. In a filter comprising a dielectric substrate placed in E position in a rectangular waveguide and comprising inserts on one of the surfaces of the substrate are placed conductors linked elec... | 11/06/2007 |
| 7288944 | Evanescent waveguide apparatus and method for measurement of dielectric constant A dielectric constant waveguide measuring apparatus preferably comprises a rectangular waveguide aperture on each end with a width a and height b. The waveguide frame is preferably split to permit the waveguide to be opened for insertion of the unknown material into... | 10/30/2007 |
| 7280011 | Waveguide and method of manufacture A hollow waveguide (1) has a wall (3) having plural pegs (16) thereon. The pegs (16) which project into the hollow interior of the waveguide (1) such that the waveguide (1) propagates electromagnetic waves only below a certa... | 10/09/2007 |
| 7274273 | Dielectric resonator device, dielectric filter, duplexer, and high-frequency communication apparatus Electrodes (2) and (3) are formed on the front face (1A) and the rear face (1B) of a dielectric substrate (1). Fan-shaped apertures (4A) and (4B) forming a resonator (4) are formed in the electrodes (2) ... | 09/25/2007 |
| 7271686 | Dielectric filter and wireless communication system A dielectric resonator is arranged such that an upper electrode 4a and a lower electrode 4b are disposed on both surfaces of a dielectric substrate 1 that has an interior metallized layer inside thereof, which is formed with a reso... | 09/18/2007 |
| 7263760 | Method for making a slow-wave ridge waveguide structure A method of fabricating a ridge waveguide filter having a slow-wave structure. The ridge waveguide is formed of a conductive sidewall-from metallic materials and may be in the form of a hollow tube, such as a rectangular hollow tube or a circular hollow tube, for ex... | 09/04/2007 |
| 7259640 | Miniature RF and microwave components and methods for fabricating such components RF and microwave radiation directing or controlling components are provided that may be monolithic, that may be formed from a plurality of electrodeposition operations and/or from a plurality of deposited layers of material, that may include switches, inductors, ant... | 08/21/2007 |
| 7256665 | Apparatus and method for in-process high power variable power division A power divider for a waveguide between a single electromagnetic microwave generator input and two output ports, the divider including two tuner networks, each comprising a moveable capacitive probe with a pair of fixed flanking inductive posts. ... | 08/14/2007 |
| 7250835 | Waveguide band-stop filter A filter includes a waveguide with at least one impedance structure with a resonant frequency. The impedance structure is positioned in the waveguide to reflect signals at the resonant frequency. The filter can be tunable by including variable capacitance devices in... | 07/31/2007 |
| 7245192 | Coupler with edge and broadside coupled sections Couplers are disclosed that include first and second mutually coupled conductors. The coupled conductors may be regular or irregular in configuration, and for example, may be linear, including rectilinear or with one or more curves, bends or turns, such as forming a... | 07/17/2007 |
| 7240424 | Method of laminating low temperature co-fired ceramic (LTCC) Material A method of forming an LTCC structure having at least one open cavity on each of first and second opposing sides is disclosed that includes the steps of forming a first LTCC structure including a first side having a plurality of cavities and a second side, subjectin... | 07/10/2007 |
| 7205948 | Variable inclination array antenna An antenna array includes an upper conductive plate structure comprising a lattice array of holes to form a radiating aperture. A lower conductive plate structure is disposed in a spaced relationship relative to the upper plate structure. The lower plate structure h... | 04/17/2007 |
| 7196598 | Dielectric waveguide filter with inductive windows and coplanar line coupling The present invention provides a filter exhibiting excellent filter characteristics and having less number of stages. A dielectric substrate (1) has one surface connected to a top conductor (2) and an opposite surface connected to a bottom conductor ( | 03/27/2007 |
| 7183881 | Cross-coupled dielectric resonator circuit A cross-coupled dielectric resonator circuit. Resonator circuits in accordance with the invention may be used to build low-loss compact filters, oscillators, and other circuits, particularly microwave circuits. The resonators are arranged relatively to each other wi... | 02/27/2007 |
| 7170373 | Dielectric waveguide filter A conductive layer is formed on each of the upper and lower surfaces of a dielectric substrate, and the two conductive layers are connected by rows of via-holes that are formed which a spacing that is less than or equal to ½ of the wavelength in the dielectric subs... | 01/30/2007 |
