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| Number | Title | Issue Date |
| 7307045 | Signal switching device A signal switching device is disclosed that is capable of transmitting signals with less signal loss while securing a good isolation characteristic. The signal switching device includes a first section formed from a superconducting material connected to a first tran... | 12/11/2007 |
| 7231238 | High temperature spiral snake superconducting resonator having wider runs with higher current density Novel structures and methods for forming useful high temperature superconducting devices, most particularly resonators, are provided. Structures resulting in reduced peak current densities relative to known structures achieve numerous desirable benefits, especially ... | 06/12/2007 |
| 7221238 | Superconducting filter device A compact superconducting filter device can easily change a bandwidth and a center frequency without changing a pattern or shape of the filter. A filter pattern is formed on a substrate made of a dielectric material. The filter pattern is made of a superconductor ma... | 05/22/2007 |
| 7218184 | Superconducting filter A superconducting filter including input/output feeders formed on one surface of a dielectric substrate, resonator patterns formed on one surface of the dielectric substrate, and a dielectric plate mounted on the one surface of the dielectric substrate with a plural... | 05/15/2007 |
| 7174197 | Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cable The present invention relates to superconductive filter technology. According to the arrangement of the superconductive filter (1), a columnar resonating member (23) having a superconductive material formed on the surface thereof is attached at one of ... | 02/06/2007 |
| 7117025 | Varactor tuning for a narrow band filter A method and apparatus for providing dynamic and remote tuning of a cryo-cooled bandpass filter is disclosed. The device includes resonator element and a voltage sensitive element as part of the capacitance in a narrow band filter circuit. A varactor such as a GaAs ... | 10/03/2006 |
| 6934569 | Elliptical resonators with radial current mode and radio frequency filter formed therefrom A resonator for use in a radio frequency filter including a substantially planar resonant portion that is substantially elliptical in plan. The resonant portion is mounted on a dielectric substrate. The resonator is configured to operate in at least a mode in which ... | 08/23/2005 |
| 6898450 | High temperature superconducting tunable filter with an adjustable capacitance gap A tunable filter having a fixed substrate, a first and second plate comprising a high-temperature superconductor material on the fixed substrate, a movable substrate, a mechanical driver attached to the fixed substrate and the movable substrate, a floating plate com... | 05/24/2005 |
| 6895262 | High temperature superconducting spiral snake structures and methods for high Q, reduced intermodulation structures Novel structures and methods for forming useful high temperature superconducting devices, most particularly resonators, are provided. Structures resulting in reduced peak current densities relative to known structures achieve numerous desirable benefits, especially ... | 05/17/2005 |
| 6873864 | Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cable The present invention relates to superconductive filter technology. According to the arrangement of the superconductive filter (1), a columnar resonating member (23) having a superconductive material formed on the surface thereof is attached at one of ... | 03/29/2005 |
| 6823201 | Superconducting microstrip filter having current density reduction parts A superconducting microstrip filter capable of achieving an improvement of power resistance without enlarging the overall size and while maintaining steep cut characteristics. This filter has a resonator section including at least one resonator. This resonator forms... | 11/23/2004 |
| 6792299 | Device approximating a shunt capacitor for strip-line-type circuits A closed conductive loop for use in planar circuits to realize shunt capacitors instead of conductive patches is disclosed. The closed conductive loop may be formed on a planar substrate or extend to multiple conductive layers in a multi-layer circuit. The use of cl... | 09/14/2004 |
| 6791430 | Resonator tuning assembly and method A device and method for tuning a planar filter through a wide range of center frequencies are disclosed. The tuning assembly includes a superconductive tuning tip and an actuator configured and adapted to move the tuning tip through a sufficient range of distances f... | 09/14/2004 |
| 6751489 | High temperature superconductor mini-filters and mini-multiplexers with self-resonant spiral resonators High temperature superconductor mini-filters and mini-multiplexers utilize self-resonant spiral resonators and have very small size and very low cross-talk between adjacent channels. ... | 06/15/2004 |
| 6731960 | Dual operation mode all temperature filter using superconducting resonators with superconductive/non-superconductive mixture A dual operation mode all temperature filter is provided. The dual operation mode filter is provided with a housing defining at least two cavities, an input port and an output port. It is also provided with a non-superconducting resonator disposed in a first one of ... | 05/04/2004 |
| 6662029 | High temperature superconducting tunable filter with an adjustable capacitance gap A tunable filter having a fixed substrate, a first and second plate comprising a high-temperature superconductor material on the fixed substrate, a movable substrate, a mechanical driver attached to the fixed substrate and the movable substrate, a floatin... | 12/09/2003 |
| 6653917 | High-temperature superconductor low-pass filter for suppressing broadband harmonics Disclosed is a high-temperature superconductor low-pass filter for removing broadband harmonics in a wireless communication system. The high-temperature superconductor low-pass filter includes a coupled line section and a transmission line section, in whi... | 11/25/2003 |
| 6633208 | Filter with improved intermodulation distortion characteristics and methods of making the improved filter Multi-stage electric filters with improved intermodulation-distortion characteristics and a method for designing such electric filters is provided. In general, the invention may include a multi-resonator electric filter in which one or more of the resonat... | 10/14/2003 |
| 6590471 | Push on connector for cryocable and mating weldable hermetic feedthrough An electrical interconnect provides a path between cryogenic or cryocooled circuitry and ambient temperatures. As a system, a cryocable 10 is combined with a trough-line contact or transition 20. In the preferred embodiment, the cryocable 10 comprises a c... | 07/08/2003 |
| 6580933 | Frequency stable resonator with temperature compensating layers A resonator for rf frequencies, especially microwave, in telecommunications systems, with an extremely stable resonant frequency over a desired operating temperature range, of predetermined width (Y) and thickness (X) and having a predetermined length (Z)... | 06/17/2003 |
| 6546266 | Filter device having independently adjustable filtering characteristics and method of adjusting central frequency of the same A filter device includes a super-conducting type filters connected in series with each other and is accommodated in a vacuum chamber. Operating temperatures of the filters are controlled to different temperatures from the outside of the vacuum chamber ind... | 04/08/2003 |
| 6532377 | Planar filter and filter system using a magnetic tuning member to provide permittivity adjustment There is disclosed a planar filter which can variably control a pass frequency band with a high precision and which is superior in skirt property and little in ripple. A planar filter member and tuning member are disposed opposite to each other via a pred... | 03/11/2003 |
| 6529750 | Microstrip filter cross-coupling control apparatus and method The present invention provides for a method and apparatus to control non-adjacent cross-coupling in a micro-strip filter. In instances of weak cross-coupling, such as a filter circuit on a high dielectric constant substrate material (e.g., LaAIO3 | 03/04/2003 |
| 6501972 | Parallel plate microwave devices having tapered current interrupting slots A microwave device includes a number of parallel-plate resonators that include at least one dielectric substrate and first and second plates arranged on either side of the substrate. At least one of the plates of each of a number of the parallel-plate res... | 12/31/2002 |
| 6487427 | Dielectric resonator, dielectric filter, dielectric duplexer, and communications device having specific dielectric and superconductive compositions A compact dielectric resonator of high Qu, in which an electrode formed of an oxide superconducting material is provided on a surface of the dielectric so as to serve as an electrode. A dielectric filter, dielectric duplexer and a communications device, i... | 11/26/2002 |
| 6484043 | Dual mode microwave band pass filter made of high quality resonators The object of the invention is a dual-mode band pass filter consisting of resonators each having a spherically shaped dielectric arranged on at least one high-temperature superconductive film, with a shielding housing, which is arranged over the high-temp... | 11/19/2002 |
| 6480728 | Superconductive non-linear transmission lines and method of construction A non-linear transmission line has high temperature superconductive elements periodically loaded thereon. The elements have non-linear characteristics that provide voltage dependent non-linearity to the transmission line. The line can have a circuit with ... | 11/12/2002 |
| 6456861 | High frequency low loss electrode having laminated main and sub conductors A high frequency low loss electrode includes a main conductor and at least one sub-conductors formed along a side of the main conductor. At least one of the at least one sub-conductor has a multi-layer structure in which thin-film conductors and thin-film... | 09/24/2002 |
| 6438395 | High frequency low loss electrode with main and sub conductors A high frequency electrode includes a main conductor and at least two sub-conductors formed along a side of the main conductor. The sub-conductors are formed so that a sub-conductor thereof positioned nearer to the outside has a smaller width.... | 08/20/2002 |
| 6438394 | Frequency dependent inductor apparatus and method for a narrow-band filter The present invention provides for a super-narrow band filter using frequency dependent L-C components. The invention utilizes a frequency dependent L-C circuit with a positive slope k for the inductor values as a function of frequency. The positive k val... | 08/20/2002 |
| 6424846 | Spiral snake high temperature superconducting resonator for high Q, reduced intermodulation Novel structures and methods for forming useful high temperature superconducting devices, most particularly resonators, are provided. Structures resulting in reduced peak current densities relative to known structures achieve numerous desirable benefits, ... | 07/23/2002 |
| 6381478 | Superconductive high-frequency circuit element with smooth contour A high-frequency circuit element that realizes a high degree of input-output coupling without causing an increase in loss and irregularity in impedance. A resonator made of a conductor film is formed on a substrate made of a dielectric monocrystal or the ... | 04/30/2002 |
| 6370404 | High temperature superconductor mini-filters and mini-multiplexers with self-resonant spiral resonators High temperature superconductor mini-filters and mini-multiplexers utilize self-resonant spiral resonators and have very small size and very low cross-talk between adjacent channels.... | 04/09/2002 |
| 6360111 | High-frequency circuit element having a superconductive resonator with an electroconductive film about the periphery In a small transmission line type high-frequency circuit element that has small loss due to conductor resistance and has a high Q value, an error in the dimension of a pattern, etc. can be corrected to adjust element characteristics. An elliptical shape r... | 03/19/2002 |
| 6360112 | High-frequency circuit element having a superconductive resonator tuned by another movable resonator In a small transmission line type high-frequency circuit element that has small loss due to conductor resistance and has a high Q value, an error in the dimension of a pattern, etc. can be corrected to adjust element characteristics. An elliptical shape r... | 03/19/2002 |
| 6314309 | Dual operation mode all temperature filter using superconducting resonators A dual operation mode all temperature filter is provided. The dual operation mode filter is provided with a housing defining at least two cavities, an input port and an output port. It is also provided with a non-superconducting resonator disposed in a fi... | 11/06/2001 |
| 6263220 | Non-etched high power HTS circuits and method of construction thereof A high power superconductive circuit has a thin film of high temperature superconductive material on a substrate. The circuit is formed from wafers that are placed into corresponding grooves within the substrate and held in place by adhesive. The grooves ... | 07/17/2001 |
| 6216020 | Localized electrical fine tuning of passive microwave and radio frequency devices A method and apparatus for the localized electrical fine tuning of passive multiple element microwave or RF devices in which a nonlinear dielectric material is deposited onto predetermined areas of a substrate containing the device. An appropriate electri... | 04/10/2001 |
| 6208227 | Electromagnetic resonator An electromagnetic resonator has a resonant element made of a high-temperature superconducting material such as YBa2 Cu3 O7-x. The resonant element has a substrate coated with a thermally conductive layer such as silver, o... | 03/27/2001 |
| 6187717 | Arrangement and method relating to tunable devices through the controlling of plasma surface waves A tunable microwave monolithic integrated circuit includes a dielectric material with a variable dielectric constant. A superconducting material with a negative dielectric constant is provided which is arranged in relation to the dielectric material in su... | 02/13/2001 |
