Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8035465 | Cavity resonator, use of a cavity resonator and oscillator circuit A cavity resonator having temperature compensation which comprises a pot and a cover, which together enclose a cavity resonance volume. The pot comprises a first material, which has a first temperature expansion coefficient and the cover comprises a second material,... | 10/11/2011 |
| 7898369 | Temperature compensation apparatus for frequency stabilization A temperature compensation apparatus for a cavity filter including a plunger barrel, a compensation barrel having a first coefficient of thermal expansion, wherein the compensation barrel is housed with the plunger barrel, a tuning rod housed primarily within the co... | 03/01/2011 |
| 7564327 | Thermal expansion compensation assemblies Filter and manifold compensation assemblies for thermal compensation of a filter cavity and a manifold which include at least one a lever element pivotally coupled to the filter or manifold at a first pivot point, an anchoring element pivotally coupled to the lever ... | 07/21/2009 |
| 7453337 | Adjustable temperature compensation system for microwave resonators A device comprises a microwave resonator having at least one cavity having a predefined resonant frequency. The device also comprises a temperature compensation system that is made from a material having a coefficient of thermal expansion that is very low compared t... | 11/18/2008 |
| 7439830 | Constant contact pressure PIM interface An interface that provides minimum changes in contact pressure over a thermal range is disclosed. The interface is a mated joint of given material, typically metallic, joined by a mechanical fastener or fasteners. The fastener(s) create contact pressure at the joint... | 10/21/2008 |
| 7375605 | Method and device for compensating the temperature of circular resonators A method and an arrangement for temperature compensation at circular resonators with dual mode utilization, which includes a material with a low coefficient of thermal expansion and for which the tensile or compressive forces are transferred to the resonator wall an... | 05/20/2008 |
| 7359206 | Radio frequency isolation system and cover assembly for vacuum electron device A self-guiding cover assembly for a vacuum electron device (VED) enclosure (704, 1316) has a cover (1002, 1302), a pair of guide plates, and a pair of guide elements (1304, 1306). The cover has at least one electrical connector (1314) dis... | 04/15/2008 |
| 7253708 | Radio frequency cavity resonatory with heat transport apparatus An RF cavity resonator that includes: a resonator chamber for containing an RF field; an RF coupling element coupled to the resonator chamber for introducing the RF field into and extracting the RF field from the resonator chamber; a tuning assembly for causing the ... | 08/07/2007 |
| 7250833 | Method and apparatus for stabilizing the temperature of dielectric-based filters A dielectric-based filter includes a thermally insulated housing, at least one filter formed from a dielectric material disposed inside the insulated housing, and a temperature maintenance device having a heating component and a cooling component for maintaining the... | 07/31/2007 |
| 7242135 | High voltage connection for vacuum electron device A high voltage direct current contact for a vacuum electron device (VED), including (a) an outer cathode line having a first hollow cylinder having a first VED connection end, (b) a contact block removably positioned within the outer cathode line, having a heater co... | 07/10/2007 |
| 7227434 | Tuning screw assembly The present invention relates to a tuning screw assembly comprising a sleeve (100) with internal threads for engaging a tuning screw (200) having external threads. The sleeve comprises a first threaded portion (32) which is axially displaced in ... | 06/05/2007 |
| 7193489 | Radio frequency cavity resonator with heat transport apparatus An RF cavity resonator (400) that includes: a resonator chamber (410) for containing an RF field; an RF coupling element (450, 452) coupled to the resonator chamber for introducing the RF field into and extracting the RF field from the resonator... | 03/20/2007 |
| 7164222 | Film bulk acoustic resonator (FBAR) with high thermal conductivity The specification discloses embodiments of an apparatus comprising a film bulk acoustic resonator (FBAR) filter comprising a piezoelectric membrane having a portion thereof sandwiched between a first electrode and a second electrode, the piezoelectric membrane being... | 01/16/2007 |
| 7078990 | RF cavity resonator with low passive inter-modulation tuning element A tunable RF cavity resonator having reduced generation of passive inter-modulation, the tunable RF cavity resonator including a cavity body, a fixed tuning post at a first end of the cavity body, a dielectric rod in the fixed tuning post interior space with a first... | 07/18/2006 |
| 7029296 | Cover assembly for vacuum electron device A self guiding cover assembly for a vacuum electron device (VED) enclosure has a cover, a pair of guide plates, and a pair of guide elements. The cover has a top, a sidewall, an inside and an outside, and at least one electrical connector disposed on the inside of t... | 04/18/2006 |
| 7012488 | Cavity resonator having an adjustable resonance frequency The aim of the invention is to provide a cavity resonator that has a great variable frequency area of a resonance frequency and is provided with good quality. Such a cavity resonator is provided with a round cross-section. The H11n in wave mode acting as the resonan... | 03/14/2006 |
| 6960969 | Resonant cavity device converting transverse dimensional variations induced by temperature variations into longitudinal dimensional variations A resonant cavity device comprises a waveguide body having a lateral wall extending in a longitudinal direction, having a first coefficient of thermal expansion, and delimiting a resonant cavity in conjunction with opposite first and second end walls. The first end ... | 11/01/2005 |
| 6897746 | Phase stable waveguide assembly A waveguide assembly for operation over a range of temperatures includes a waveguide body and a plurality of restraining strips coupled to the waveguide body. The waveguide body includes a pre-curved narrow sidewall of material having a first coefficient of thermal ... | 05/24/2005 |
| 6734766 | Microwave filter having a temperature compensating element A microwave filter having a temperature compensating element includes a housing wall structure, a filter lid, a resonator rod, a tuning screw and the temperature compensating element. The housing wall structure defines a cavity. The filter lid closes the cavity. The... | 05/11/2004 |
| 6657214 | Shielded enclosure for testing wireless communication devices A test system having a shielded enclosure and common air interface for testing the transmit and receive functionality of wireless communication devices such as mobile phones. A test system according to the present invention provides improved fault coverag... | 12/02/2003 |
| 6549103 | Device at filters The present invention relates to a device at filters for filtering unwanted signals from radio transmitters and/or for use during combination of radio transmitters. Said filter (1) has at least one cavity (2 and/or 3) for filtering radio signals. At least... | 04/15/2003 |
| 6535087 | Microwave resonator having an external temperature compensator An externally temperature-compensated microwave resonator comprises a microwave resonator and an external temperature compensator. The microwave resonator is a multi-cavity waveguide. The cavities are configured side-by-side and coupled through irises. Th... | 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 |
| 6441705 | Temperature self-compensating decoupling filter for high frequency Transceivers The present invention relates to a duplexer set up by two decoupling filters for high frequency transceivers of the temperature self-compensating type and implemented by means of a pair of mechanic bodies (2), each one of which including a plurality of re... | 08/27/2002 |
| 6433656 | Frequency-stabilized waveguide arrangement A waveguide arrangement for microwaves and the like has a first waveguide composed of a material having a first thermal expansion coefficient, a second waveguide composed of a material having a second thermal expansion coefficient which is different from ... | 08/13/2002 |
| 6420947 | Thermal compensation arrangement for microwave filter This invention discloses an improved thermal compensation arrangement for a microwave filter of the type comprising at least one cavity defined by a metal side wall having a low coefficient of thermal expansion, such as invar, and lightweight metal end wa... | 07/16/2002 |
| 6300850 | Temperature compensating cavity bandpass filter A method and apparatus for frequency stabilization of cavity filters of the class including an outer tubular conductor and an inner conductor is effected by supporting the inner conductor of the resonant cavity by an apparatus comprised of a reference col... | 10/09/2001 |
| 6232852 | 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... | 05/15/2001 |
| 6169468 | Closed microwave device with externally mounted thermal expansion compensation element The thermal expansion of a microwave device such as a microwave resonator is partially or completely compensated by an externally mounted thermal expansion element. The microwave device includes a sidewall and an endwall affixed at its periphery to the si... | 01/02/2001 |
| 6057748 | Methods of tuning and temperature compensating a variable topography electromagnetic wave device An electromagnetic wave component uses one or more diaphragms secured to the interior of a waveguide structure to tune its resonant frequency, with each diaphragm engaged by one or more adjustment members that deform it. The adjustment members are prefera... | 05/02/2000 |
| 6002310 | Resonator cavity end wall assembly An electromagnetic resonator comprises a waveguide body having a generally tubular side wall and a pair of end wall assemblies. The end wall assembly includes a bowed aluminum plate and an INVAR disk, attached to one another at the periphery thereof. The ... | 12/14/1999 |
| 5867077 | Temperature compensated microwave filter A temperature compensated microwave filter has end caps and irises that each contain a projection that extends into a cavity to reduce the volume change of the cavity that would otherwise occur with changes in temperature due to an expansion or contractio... | 02/02/1999 |
| 5798676 | Dual-mode dielectric resonator bandstop filter An electromagnetic bandstop filter comprises a microwave circuit, at least one microwave resonator, coupling means that couples electromagnetic energy to and from the microwave resonator, and an impedance transformer coupled to, and in series with, the co... | 08/25/1998 |
| 5754084 | Temperature-compensated resonator A temperature-compensated resonator including a control rod disposed in a resonator housing for controlling the center resonance frequency provided by the resonator; a conductor tube secured to the housing and coaxially disposed around the control rod; a ... | 05/19/1998 |
| 5714920 | Dielectrically loaded cavity resonator A method of producing a microwave resonator comprising a cavity (50) defined, at least in part, by a generally cylindrical wall (64) having an electrically conductive inner surface and containing a generally cylindrical piece of low loss dielectric materi... | 02/03/1998 |
| 5686874 | Temperature-compensated combiner A temperature-compensated combiner including a control rod disposed in a combiner housing for controlling a middle frequency; a resonator tube secured to the housing and coaxially disposed around the control rod; a regulating cup arranged at an end of the... | 11/11/1997 |
| 5589807 | Multi-mode temperature compensated filters and a method of constructing and compensating therefor Multi-mode waveguide filters are temperature compensated using dielectric material contained within at least one cavity of a filter. The variation in operating frequency of the filter that would otherwise result from changes in temperature is substantiall... | 12/31/1996 |
| 5374911 | Tandem cavity thermal compensation A plural cavity structure (10), suitable for use as a microwave filter (34, 34A, 34B) , has plural cavities (24, 26, 28, 30) disposed within a cylindrical aluminum housing (12) and having a central planar transverse wall (18) including an iris (38) for co... | 12/20/1994 |
| 5329255 | Thermally compensating microwave cavity A thermally compensating microwave cavity is provided. An active device that generates microwaves is disposed within this microwave cavity such that microwaves are emitted within the cavity. A first portion of these microwaves travels in one direction fro... | 07/12/1994 |
| 5309129 | Apparatus and method for providing temperature compensation in Te101 mode and Tm010 mode cavity resonators A TE101 mode cavity resonator housing 60 has a truss 70 securely mounted to one of its broadwalls 72. The truss 70 is fabricated from a material having a lesser coefficient of expansion than that of the material from which the housing 60 is fab... | 05/03/1994 |
