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| Number | Title | Issue Date |
| 8022792 | TM mode evanescent waveguide filter Waveguide filters utilizing the TM modes in an evanescent waveguide are provided. The Q of such filters surpasses any evanescent, dual and triple mode filters in propagating or evanescent waveguides. The waveguide filter in accordance with the present invention feat... | 09/20/2011 |
| 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 |
| 7332982 | Waveguide diplexer of electric plane T-junction structure with resonant iris A waveguide diplexer having an electric plane T-junction structure with a resonant iris is disclosed. The waveguide includes: a waveguide having a predetermined shaped cross section; a transmitting filter for preventing to generate a harmonic band and a higher mode ... | 02/19/2008 |
| 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 |
| 7212087 | Twisted waveguide and wireless device H plane and E plane of a second rectangular waveguide element are inclined at an angle of 45° with respect to H plane and E plane of a first rectangular waveguide element. A connection element disposed between the first and second rectangular waveguide elements has... | 05/01/2007 |
| 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 |
| 7183883 | RF circuit component and RF circuit An RF circuit component according to the present invention includes a waveguide 1 and at least one resonator 2, which is arranged inside the waveguide 1. The resonator 2 includes at least one patterned conductor layer, which is parallel t... | 02/27/2007 |
| 7164821 | Tunable resonant cavity based on the field effect in semiconductors The index of refraction of waveguide structures can be varied by altering carrier concentration. The waveguides preferably comprise semiconductors like silicon that are substantially optically transmissive at certain wavelengths. Variation of the carrier density in ... | 01/16/2007 |
| 7113060 | Dielectric waveguide filter with inductive windows and coplanar line coupling A dielectric waveguide tube band-pass filter assuming lower characteristic change upon mounting, and having smaller dimensions and lower loss. Conductor layers (2a, 2c) are formed on the top and bottom surfaces of a dielectric substrate (... | 09/26/2006 |
| 7088060 | Electron tube for communication An electron tube for communication is provided with an output waveguide that is directly coupled to an outlet port of a RF (Radio Frequency) wave signal, and at least one of a low-pass filter, a high-pass filter, and a band-pass filter is included inside the output ... | 08/08/2006 |
| 7068128 | Compact combline resonator and filter A compact combline resonator and filter. The annular radius of inductive posts are modulated along the length of the inductive post to establish a desired inductive value for a series inductive capacitive resonator. The filter has a waveguide channel with an input p... | 06/27/2006 |
| 7057482 | Electromagnetic filter assemblies An electromagnetic filter assembly includes complimentary first and second blocks (1) and (2) defining two conjoined sections (10), (11) of an electromagnetic waveguide duct. A shim-like electromagnetic filter element (3) is held b... | 06/06/2006 |
| 7042316 | Waveguide dielectric resonator electrically tunable filter A tunable filter which may include at least one resonator. The at least one resonator may comprise a ring resonator made on a dielectric substrate placed in a waveguide, wherein the waveguide may contain a cut-off portion which houses and shields at least one resona... | 05/09/2006 |
| 7023302 | Slow-wave structure for ridge waveguide A ridge waveguide filter having a slow-wave structure. The ridge waveguide has an elongate hollow tube formed of a conductive sidewall. At least a first part of the conductive sidewall periodically is recessed along an elongate direction of the hollow tube, such tha... | 04/04/2006 |
| 7019603 | Waveguide type ortho mode transducer An object of the present invention is to obtain a waveguide type polarizer, which enables miniaturization thereof, shortening of an axis, and broad band promotion, and which has high performance. In order to attain the object, the waveguide type polarizer includes: ... | 03/28/2006 |
| 7009469 | Compact waveguide filter and method A compact multiple VSWR element filter in which one or more of the VSWR filter elements is a waveguide bend or a waveguide media transition. Methods are also disclosed. ... | 03/07/2006 |
| 6927653 | Dielectric waveguide type filter and branching filter A cutoff waveguide path is provided in a part of a dielectric waveguide comprising a pair of main conductive layers formed on an upper and a lower surfaces of a dielectric and groups of conductive vias arranged in the direction of signal transmission with a space of... | 08/09/2005 |
| 6927654 | Corrosion resistant waveguide system and method A waveguide device that includes a waveguide device body having interior surfaces, a deposited aluminum coating disposed on the interior surfaces of the waveguide device body, a protective coating disposed on the deposited aluminum coating. ... | 08/09/2005 |
| 6917266 | Microwave waveguide A microwave component has a cavity including a plurality of geometrically shaped elements therein wherein the shape profile and position of the elements in relation to the cavity act to define the guiding properties of the cavity and therefore to define operational ... | 07/12/2005 |
| 6914577 | System and method for improving antenna pattern with a TE20 mode waveguide An isolation shield improves the F/B ratio for a directional antenna radiating a electromagnetic wave with a wavelength of λXMT with a TE20 mode waveguide. The system includes a directional antenna and a waveguide adapted for attachment to one... | 07/05/2005 |
| 6911882 | High-frequency module, transmitter-receiver, and method of adjusting characteristic of the high-frequency module A high-frequency module includes a dielectric plate in which a resonator is formed and a cover for covering the dielectric plate. A hole is provided in the cover. A laser beam for laser trimming passes through the hole. The area of opening and the depth of the hole ... | 06/28/2005 |
| 6888425 | Resonator, filter, composite filter, transmitting and receiving apparatus, and communication apparatus A microstrip resonator including a dielectric substrate, a resonance electrode on a first main surface of the dielectric substrate, and a ground electrode over an entire second main surface of the dielectric substrate. The resonance electrode includes a superconduct... | 05/03/2005 |
| 6850131 | Bandpass filter A highly compact bandpass filter that has excellent mechanical strength is disclosed. A bandpass filter according to the present invention employs a dielectric block of substantially rectangular prismatic shape constituted of a first portion lying between a first cr... | 02/01/2005 |
| 6828880 | Bandpass filter A highly compact band pass filter that has excellent mechanical strength is disclosed. A band pass filter according to the present invention employs a dielectric block of substantially rectangular prismatic shape constituted of a first portion lying between a first ... | 12/07/2004 |
| 6714103 | TEM band pass filter having an evanescent waveguide A highly compact and easily fabricated band pass filter is disclosed. A band pass filter according to the present invention employs a first half-wave (λ/2) resonator having a first open end on which an input terminal is formed and a second open end opposite to the ... | 03/30/2004 |
| 6686208 | Device and method for carrying out fluoresence immunotests The invention relates to devices and methods for carrying out quantitative fluorescence immunoassays using evanescent field excitation. Light from at least one light source is directed onto the boundary between two media which have differing refractive in... | 02/03/2004 |
| 6674346 | Evanescent resonators A evanescent resonator device includes a short-circuited evanescent waveguide and loading capacitor. The evanescent waveguide of the resonator includes a single length of evanescent transmission line terminated in short circuit, a first support substrate ... | 01/06/2004 |
| 6661314 | Dielectric band pass filter having an evanescent waveguide A highly compact band pass filter that has excellent mechanical strength is disclosed. A band pass filter according to the present invention employs a dielectric block of substantially rectangular prismatic shape constituted of a first portion lying betwe... | 12/09/2003 |
| 6657521 | Microwave waveguide filter having rectangular cavities, and method for its fabrication A microwave waveguide filter includes a main-line cavity structure with a group of at least two rectangular main-line cavities arrayed along a main propagation path and including a first main-line cavity and a second main-line cavity. Each main-line cavit... | 12/02/2003 |
| 6646317 | High power photodiode An evanescently coupled photodiode of the invention has a semiconductor substrate 1, a guide layer 3 being greater in refractive index than the semiconductor substrate, and an absorption layer 4 on a partial area of said guide layer formed in it. The mesa... | 11/11/2003 |
| 6600392 | Metal window filter assembly using non-radiative dielectric waveguide Disclosed is a metal window filter assembly, of a millimeter wave band, using an NRD guide. The filter assembly comprises a filter housing including parallel conductive plates and a filter for filtering a certain frequency band of an electromagnetic wave ... | 07/29/2003 |
| 6563402 | Band pass filter A highly compact band pass filter that reliably achieves desired characteristic is disclosed. A band pass filter according to the present invention employs first and second disk resonators having exciting electrodes formed on one side surface thereof, an ... | 05/13/2003 |
| 6535083 | Embedded ridge waveguide filters A ridge waveguide filter which is formed of metallized blind vias in a plurality of contiguous layers of a dielectric medium including low temperature cofired ceramic (LTCC), high temperature cofired ceramic (HTCC) or organic printed wiring boards (PWB) i... | 03/18/2003 |
| 6529104 | 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... | 03/04/2003 |
| 6507252 | High rejection evanescent MIC multiplexers for multifunctional systems An integrated circuit multiplexer comprises a waveguide having an interior cavity, first RF input port, and a first and second output ports; a dielectric structure positioned in the cavity; an RF input feed attached to the dielectric structure that extend... | 01/14/2003 |
| 6285267 | Waveguide filter A waveguide filter having a stepped transformer area on the input and/or output sides, with at least one band-stop filter composed of geometrically closely spaced stop elements integrated into this stepped transformer area. These features make it possible... | 09/04/2001 |
| 6232853 | Waveguide filter having asymmetrically corrugated resonators A waveguide filter is provided having a plurality of asymmetrical corrugated resonators. The filter may also include an input section and an output section including a low-pass filter unit and a transformer unit. The low-pass filter unit includes a plural... | 05/15/2001 |
| 6169466 | Corrugated waveguide filter having coupled resonator cavities A corrugated waveguide filter has a plurality of coupled resonator cavities arranged in a horizontal or vertical manner. The filter may include an input transformer section and an output transformer section for matching the filter to external waveguide li... | 01/02/2001 |
| 6154106 | Multilayer dielectric evanescent mode waveguide filter A multilayer dielectric evanescent mode waveguide bandpass filter with resonators utilizing via hole technology is capable of achieving very narrow bandwidths with minimal insertion loss and high selectivity at microwave frequencies is provided. A typical... | 11/28/2000 |
