50results about How to "Sufficient attenuation" patented technology

A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference Δn1 with the optical cladding. The intermediate cladding has a radius r2 and a positive refractive index difference Δn2 with the optical cladding, wherein Δn2 is less than Δn1. The depressed trench has a radius r3 and a negative index difference Δn3 with the optical cladding. At a wavelength of 1310 nanometers, the optical fiber has a mode field diameter (MFD) between 8.6 microns and 9.5 microns and, at a wavelength of 1550 nanometers, the optical fiber has bending losses less than about 0.25×10−3 dB / turn for a radius of curvature of 15 millimeters. At a wavelength of 1260 nanometers, attenuation of the LP11 mode to 19.3 dB is achieved over less than 90 meters of fiber.

A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r1 and a positive refractive index difference Δn1 with the optical cladding. The intermediate cladding has a radius r2 and a refractive index difference Δn2 with the optical cladding, wherein Δn2 is less than the central core's refractive index difference Δn1. The depressed trench has a radius r3 and a negative index difference Δn3 with the optical cladding. The optical fiber has a nominal mode field diameter (MFD) between 8.6 microns and 9.5 microns at a wavelength of nanometers, and at a wavelength of 1550 nanometers, the optical fiber has bending losses less than 0.15 dB / turn for a radius of curvature of 5 millimeters and cable cut-off wavelengths of less than or equal to nanometers.

Embodiments of the present disclosure provide an electrostatic chuck for maintaining a flatness of a substrate being processed in a plasma reactor at high temperatures. In one embodiment, the electrostatic chuck comprises a chuck body coupled to a support stem, the chuck body having a substrate supporting surface, and the chuck body has a volume resistivity value of about 1×107 ohm-cm to about 1×1015 ohm-cm in a temperature of about 250° C. to about 700° C., and an electrode embedded in the body, the electrode is coupled to a power supply. In one example, the chuck body is composed of an aluminum nitride material which has been observed to be able to optimize chucking performance around 600° C. or above during a deposition or etch process, or any other process that employ both high operating temperature and substrate clamping features.

A phased array antenna system on an aircraft that incorporates a choke plate that significantly attenuates sidelobes of the antenna beam pattern at elevation angles that would cause RF interference with ground-based terrestrial wireless networks. The choke plate includes a plurality of choke grooves that substantially circumscribe the antenna aperture. The choke plate has an upper surface that is positioned generally coplanar with the upper surface of the antenna aperture. The grooves of the choke plate may be filled with a dielectric material. The choke plate provides a smooth aerodynamic component that significantly attenuates beam scattering, and thus the radiation pattern sidelobes of the antenna at or below the horizon, when the aircraft is in flight.

An automatic tuning scheme for two active band-pass filters where both filters operate on the signal while simultaneously being tuned using a reference signal. To allow that the amplitude of a reference signal is made small and since both filters demonstrate a good linearity the build-up of the inter-modulation distortion does not occur. The first band-pass filter is tuned with the reference falling into its pass-band. The second band-pass filter is also tuned with the reference placed into its pass-band. The reference is practically eliminated by the virtue of the complexity of the second band-pass filter. Assuming the filter passes the signal for positive frequencies if the reference is made a negative frequency by appropriate 90 degrees phase shifting it will be attenuated by at least 55 dB, which is a sufficient signal-to-reference ratio.

An information processing device for processing reception signals converted into digital signals, includes: a first conversion unit for executing sampling rate conversion of each of the digital signals to be computed with each tap coefficient of a K'th-order FIR filter; a filter computing unit for executing computation processing of the K'th order FIR filter on K digital signals each of which have been subjected to sampling rate conversion by the first conversion unit; and a control unit for controlling sampling rate conversion of the digital signals by the first conversion unit, and the computation processing of the K'th order FIR filter by the filter computing unit.

A battery monitoring apparatus a plurality of connection lines, a monitoring circuit, a first filter circuit, and a second filter circuit. The monitoring circuit is provided with a pair of sensing terminals for each pair of positive and negative electrode terminals of each of a plurality of battery cells of a battery pack. The plurality of connection lines includes a plurality of common line and first and second branch lines. The first filter circuit includes first resistors located on the first and second branch lines connected to the pair of sensing terminals, and a first capacitor located between the first and second branch lines connected to the pair of sensing terminals. The second filter circuit includes a second resistor located on the plurality of connection lines, and a second capacitor connected in series between the plurality of connection lines without passing through the first resistors and the second resistor.

The invention provides a rotor structure of line-start permanent magnet (LSPM) synchronous motor that includes a shaft; four fan-shaped magnetic poles each having a first eccentric circular arcs of the surface of the magnetic poles which has a center O1 that is offset from the center O of the rotor with an offset length OS1 and which makes the maximum thickness of the air gap roughly two to five times as much as the minimum thickness of the air gap; four permanent magnets disposing in the inner loop of each of the fan-shaped magnetic poles□a plurality of pear-shaped conductor slots disposing in equal spaces in the outer loop of the rotor in each of the fan-shaped magnetic poles and orienting in radial direction having O1 as the center for forming a squirrel cage winding; as well as four recesses at the midpoint of the first eccentric circular arcs of the surface of the magnetic poles in each of the fan-shaped magnetic poles.

The invention relates to acquisition techniques for time-of-flight mass spectra with ionization of the analyte substances by matrix assisted laser desorption. Generally speaking, these acquisition techniques involve adding together a large number of individual time-of-flight spectra, each with restricted dynamic measuring range, to form a sum spectrum. The invention provides a method that improves, in particular, the reproducibility, the concentration accuracy and therefore the ability to quantify the mass spectra. Particular embodiments also increase the dynamic range of measurement. For this purpose, multiple series of mass spectra are acquired, whereby the energy density in the laser spot is increased in discrete steps. As a result, many ion signals saturate the detector and can therefore no longer be evaluated. However, it is possible to employ a technique in which the ion beam is increasingly defocused, or, secondly, to replace parts of the spectrum that are subject to saturation by intensity extrapolations from mass spectra acquired with lower energy density. In the first case, hundreds or thousands of individual mass spectra must be added together in order to increase the dynamic measuring range. In the second case, the finally acquired mass spectrum, with its replacements, forms a mass spectrum with a high dynamic measuring range, improved reproducibility and better concentration accuracy. The gradient of the increasing intensities of the ion signals, as a function of the energy density, supplies additional information about the proton affinity of the analyte ions. The concentration accuracy is enhanced because the increase in the number of proton donors in the ionization plasma leads to an increase in the ionization of those analyte substances that have a lower proton affinity.

A transmitter employing a sigma delta modulator having a noise transfer function adapted to shift quantization noise outside at least one frequency band of interest. A technique is presented to synthesize the controllers within a single-loop sigma delta modulator such that the noise transfer function can be chosen arbitrarily from a family of functions satisfying certain conditions. Using the novel modulator design technique, polar and Cartesian (i.e. quadrature) transmitter structures are supported. A transmitter employing polar transmit modulation is presented that shapes the spectral emissions of the digitally-controlled power amplifier such that they are significantly and sufficiently attenuated in one or more desired frequency bands. Similarly, a transmitter employing Cartesian transmit modulation is presented that shapes the spectral emissions of a hybrid power amplifier such that they are significantly and sufficiently attenuated in one or more desired frequency bands.

An engine mount including: an inner fitting having a first flange at a first axial end thereof; a cylindrical outer fitting having at a first axial end a second flange extending outwardly in the axis-perpendicular direction and positioned in opposition to but spaced apart from the first flange portion in an axial direction; a side rubber elastic body elastically connecting the first and second flanges; a main rubber elastic body elastically connect the inner fitting and the outer fitting in a direction of axial elongation of the side portion rubber elastic body; and a hollow portion extending from a second axial end toward a first axial end of the main rubber elastic body with a distal and thereof reaching an interior of the side rubber elastic body, thereby bifurcating the main rubber elastic body at an inside circumferential face of the outer fitting. The engine mount is positioned with the axial direction facing a left-right direction of the vehicle.

The present invention selectively uses a high-impedance layer to reduce the effects of E-M scattering at metallic discontinuities. The high-impedance layer can be fabricated using a combination of metallic and resistive materials that are typically used in electro-static discharging (ESD) applications. A thin layer of metal can be deposited on the surface of a dielectric substrate such as polyethylene. This metallic layer can be on an inner, outer, or buried layer of the material. The metallic layer allows the RF induced currents to spread out over a designated surface area. A layer of resistive material can be applied to a similar dielectric layer. The resistive layer provides sufficient attenuation to decrease the RF surface waves and minimize electromagnetic scattering on the printed circuit board (PCB). Furthermore, since the metallic and resistive materials can be applied in very thin layers, sufficient transparency can be preserved in desired areas such as the mobile phone's display region.

A hybrid multiplexer includes a filter configured to allow a high-frequency signal of an HB to pass therethrough, and a filter configured to allow a high-frequency signal of an MB to pass therethrough, in which the filter includes a matching circuit, a first resonance circuit defined by one of an LPF and an HPF, and a second resonance circuit defined by the other of the LPF and the HPF, the LPF includes an inductor and a parallel arm resonator, the HPF includes a serial arm resonator and an inductor, and a resonant frequency of the parallel arm resonator and an anti-resonant frequency of the serial arm resonator are both located between a frequency at a low-band end of the HB and a frequency at a high-band end of the HB.

The invention provides recombinant flavivirus vaccines that can be used in the prevention and treatment of flavivirus infection. The vaccines of the invention contain recombinant flaviviruses including attenuating mutations.

A piezoelectric oscillator part capable of suppressing oscillation that leaks from a piezoelectric oscillator to a substrate side is obtained. The piezoelectric oscillator part has a piezoelectric oscillator held on a substrate by first and second conductive holding members. The first conductive holding member is arranged proximal to a first end of the substrate. A terminal electrode connected to the first conductive holding member is arranged proximal to a second end of the substrate opposite the first end. The first conductive holding member and the terminal electrode are electrically connected by a wiring electrode.

Live attenuated vaccines against brucellosis and infection by other diseases are described. It has been discovered that trans complementation of the Brucella wboA gene can be used to maintain an expression vector in an attenuated Brucella host cell in a vaccinee. Further, heterologous antigens can be expressed using this Brucella platform, thus effecting a multivalent vaccine against Brucella and the disease corresponding to the heterologous antigen.

This invention relates to chimeric flavivirus vectors that can be used, for example, in the prevention and treatment of influenza virus infection, compositions including such viral vectors, and methods employing the vectors.

An aircraft window includes: a window body including window panels, and an electromagnetic shield layer laminated on the window panels; a window frame that is made of a conductive material, and that surrounds the window body; a rubber-based gasket provided with conductivity, the gasket being at least partially held between the window body and the window frame; and a conductive layer that is located between the window body and the gasket, and that brings the electromagnetic shield layer and the gasket into conduction with each other. The window frame includes a holding section that holds the window body via the gasket from an airframe outer side. The conductive layer extends to a portion of the window body facing the holding section.

Embodiments of the present disclosure provide an electrostatic chuck for maintaining a flatness of a substrate being processed in a plasma reactor at high temperatures. In one embodiment, the electrostatic chuck comprises a chuck body coupled to a support stem, the chuck body having a substrate supporting surface, and the chuck body has a volume resistivity value of about 1×107 ohm-cm to about 1×1015 ohm-cm in a temperature of about 250° C. to about 700° C., and an electrode embedded in the body, the electrode is coupled to a power supply. In one example, the chuck body is composed of an aluminum nitride material which has been observed to be able to optimize chucking performance around 600° C. or above during a deposition or etch process, or any other process that employ both high operating temperature and substrate clamping features.

In an electronic component, first through n-th LC parallel resonators respectively include first through n-th inductors disposed in a device body such that they are sequentially arranged in a first direction in an order from the first inductor to the n-th inductor. The first and the n-th inductors are wound around respective winding axes extending along the first direction. At least one predetermined inductor among the second through the (n−1)-th inductors is wound around a winding axis extending in a second direction which is perpendicular or substantially perpendicular to the first direction. A center of the predetermined inductor in the second direction is positioned toward one side of the second direction with respect to the winding axes of the first and the n-th inductors, as viewed from a plane of the device body in a third direction which is perpendicular or substantially perpendicular to the first and second directions.

The present invention selectively uses a high-impedance layer to reduce the effects of E-M scattering at metallic discontinuities. The high-impedance layer can be fabricated using a combination of metallic and resistive materials that are typically used in electro-static discharging (ESD) applications. A thin layer of metal can be deposited on the surface of a dielectric substrate such as polyethylene. This metallic layer can be on an inner, outer, or buried layer of the material. The metallic layer allows the RF induced currents to spread out over a designated surface area. A layer of resistive material can be applied to a similar dielectric layer. The resistive layer provides sufficient attenuation to decrease the RF surface waves and minimize electro-magnetic scattering on the printed circuit board (PCB). Furthermore, since the metallic and resistive materials can be applied in very thin layers, sufficient transparency can be preserved in desired areas such as the mobile phone's display region.

Optical amplification stage (1) for OTDR monitoring, comprising a first (2a) and a second optical signal path (2b), a first (3a) and a second optical amplifier (3b), a first optical coupler (4a) placed along the first optical signal path downstream the first optical amplifier, a second optical coupler (4b) placed along the second optical signal path downstream the second optical amplifier, an optical by-pass path (5) optically connecting the first and the second optical coupler, a first (11a) and a second optical reflector (11b) optically connected to respectively the first and second optical coupler, and an optical filter (10) placed along the optical by-pass path which has attenuation high on the whole WDM band and low at the OTDR wavelength(s).

A filter (22A) includes: a series arm circuit (11) that is connected between an input / output terminal (22m) and an input / output terminal (22n); and a parallel arm circuit (12) that is connected between a node (x1), which is on a path that connects the input / output terminal (22m) and the input / output terminal (22n), and ground. The parallel arm circuit (12) includes a parallel arm resonator (22p) and an impedance circuit (13) that is serially connected to the parallel arm resonator (22p). The impedance circuit (13) includes a first impedance element, which is one of an inductor and a capacitor, a second impedance element, which is the other of an inductor and a capacitor, and a switch (22SW) that is serially connected to the second impedance element. A first series circuit (14) comprising of the second impedance element and the switch (22SW) is connected in parallel with the first impedance element.

The invention relates the electromagnetic screen plate processing method used for building, comprising the following step: cutting the base plate according to the requirement, then grinding the surface of the base plate, burring, melting the metallic material which possesses the electromagnetic screen with hot spraying equipment, carbureting the molten metallic material and spraying it to the surface of base plate, and forming the shielding layer on the surface of base plate. The shielding layer is made by the metallic material which possesses the electromagnetic screen, so it possesses the absorption effect to the electromagnetic wave energy. The electromagnetic screen plate can be directly installed on the light gage steel joist element to form screen wall, shortening the building work hour and reducing the cost.

The invention provides recombinant flavivirus vaccines that can be used in the prevention and treatment of flavivirus infection. The vaccines of the invention contain recombinant flaviviruses including attenuating mutations.

In an acoustic wave filter device, first and second longitudinally coupled resonator SAW filters are provided on a piezoelectric substrate. The first and second longitudinally coupled resonator SAW filters are connected in parallel to each other. The first and second longitudinally coupled resonator SAW filters are withdrawal-weighted. The withdrawal weighting in at least the longitudinally coupled resonator SAW filter is different from the withdrawal weighting in the other longitudinally coupled resonator SAW filter.