31results about How to "Flat response" patented technology

A connector is provided for simultaneously improving both the NEXT high frequency performance when low crosstalk plugs are used and the NEXT low frequency performance when high crosstalk plugs are used. The connector includes a first compensation structure provided on an inner metalized layer of the PCB at a first stage area of the PCB, and a second compensation structure, provided at a second stage area of the PCB, for increasing compensation capacitance with increasing frequency.

A connector is provided for simultaneously improving both the NEXT high frequency performance when low crosstalk plugs are used and the NEXT low frequency performance when high crosstalk plugs are used. The connector includes a first compensation structure provided on an inner metalized layer of the PCB at a first stage area of the PCB, and a second compensation structure, provided at a second stage area of the PCB, for increasing compensation capacitance with increasing frequency.

A phacoemulsification system includes a phacoemulsification handpiece including a cutting tip ultrasonically vibrated by an ultrasonic transducer. A power supply is provided for driving the ultrasonic transducer at a resonant frequency of the transducer and cutting tip and varying power to the transducer, in response to loading of the cutting tip, by phase shifting voltage and current supplied to the transducer.

Fabry-Perot filters are disclosed. having micro-electro-mechanical systems (MEMS) parts operable for tuning of the filters. The filters of the present invention are particularly useful in WDM and DWDM optical communication systems for multiplexing and demultiplexing channels of electromagnetically-carried data traversing the system. The filter can be miniaturized by etching or photolithographing the filter on silicon wafers utilizing MEMS technology. A MEMS device fabricated on the wafer is operative for moving a variably positioned mirror to change the length of the cavity or etalon of the Fabry-Perot filter, thereby tuning the filter to multiplex or demultiplex the channels.

A connector is provided for simultaneously improving both the NEXT high frequency performance when low crosstalk plugs are used and the NEXT low frequency performance when high crosstalk plugs are used. The connector includes a first compensation structure provided on an inner metalized layer of the PCB at a first stage area of the PCB, and a second compensation structure, provided at a second stage area of the PCB, for increasing compensation capacitance with increasing frequency.

A divided armature for the trip mechanism of a circuit breaker especially useful for low trip current breakers allows for two independent adjustments: first of the magnetic air gap between the yoke and the armature and second of the clearance between the trip bar and the back plate of the armature. The divided armature allows the force of a return spring of the trip mechanism to be unchanged while adjusting the magnetic air gap to set the trip current point.

A portable device for detecting a radio frequency transmission of electromagnetic radiation includes a housing; a controller situated within the housing; memory communicatively connected to the controller; an antenna connected to the controller and configured to receive the radio frequency transmission; and an audio-generating component connected to the controller. The radio frequency transmission of the electromagnetic radiation is harmful to an electrical device and is from a transient electromagnetic device (TED) threat source. The controller is operative for sensing magnitude, duration, and / or repetition of the radio frequency transmission; identifying a class of the radio frequency transmission based on one of the magnitude, duration, and repetition associated with the radio frequency transmission; and causing the audio-generating component to output tones to provide aural discrimination of an identified class of the radio frequency transmission received by the portable device. The identified class is a transient electromagnetic pulse signal from the TED source.

An accelerometer or a seismometer using an in-plane suspension geometry having a suspension plate and at least one fixed capacitive plate. The suspension plate is formed from a single piece and includes an external frame, a pair of flexural elements, and an integrated proof mass between the flexures. The flexural elements allow the proof mass to move in the sensitive direction in the plane of suspension while restricting movement in all off-axis directions. Off-axis motion of the proof mass is minimized by the use of intermediate frames disbursed within and between the flexural elements. Intermediate frames can include motion stops to prevent further relative motion during overload conditions. The device can also include a dampening structure, such as a spring or gas structure that includes a trapezoidal piston and corresponding cylinder, to provide damping during non-powered states.

A first-order crossover network having low-pass and high-pass filters to respectively drive first and second loudspeakers in a loudspeaker system is designed such that the phase difference at a crossover frequency between output signals of the first and second loudspeakers is no greater than 60 degrees, so that the output signals are at least partially in phase. Preferably, the phase difference should be about 40 degrees to create a near in-phase effect. The polarity in which the first loudspeaker is coupled to the first-order crossover network is an inverse of the polarity in which the second loudspeaker is coupled to the crossover network. Optionally, the input signals can be equalized to flatten the magnitude responses of the crossover network.

A divided armature for the trip mechanism of a circuit breaker especially useful for low trip current breakers allows for two independent adjustments: first of the magnetic air gap between the yoke and the armature and second of the clearance between the trip bar and the back plate of the armature. The divided armature allows the force of a return spring of the trip mechanism to be unchanged while adjusting the magnetic air gap to set the trip current point.

The present invention discloses a super high frequency (SHF) wave band high-performance filter bank based on the low temperature co-fired ceramic (LTCC) and defected ground structure (DGS) technology. The filter bank comprises a single-pole double-throw switch at a SHF wave band and two filters with two different frequency bands; the single-pole double-throw switch comprises two ports which are a signal input port, a first signal output port, a second signal output port, a first output selection control end and a second output selection control end; and the first signal output port is connected with an input port of a first microwave filter while the second signal output port is connected with an input end of a second microwave filter. The two filters both adopt a stripline structure with five-level resonance, and are realized by adopting the LTCC technique. Excellent properties such as small insertion losses, small passband fluctuation, transitional zone steepness and excellent out-of-band rejection of the two filters are combined, and the filter bank is excellent in stability, reliable in electric performance, and applicable to separation treatment of different frequency portions in one circuit of signal or to other occasions with strict requirements and corresponding systems.

The invention relates to a compensation type pulse X-ray detecting device with double scintillators, which comprises a hollow metal shell, an entrance window and an exit window that are arranged on two opposite ends of the metal shell, a detecting component and a photoelectric detector; the detecting component is arranged in the cavity surrounded by the metal shell, the entrance window and the exit window; the photoelectric detector is communicated with the cavity through a hole arranged in the metal shell; the detecting component comprises an inorganic thin film scintillator and an organic thin film scintillator; the inorganic thin film scintillator is arranged inside the entrance window, and the organic thin film scintillator is arranged inside the exit window. The device solves the technical problem that the existing detecting device is unstable in detecting sensitivity and cannot satisfy the absolute measurement demands of ray intensity. The device has the advantages of flat sensitivity response and relatively quicker response time, and can be used for the absolute measurement of the radiation field intensity of pulse X-ray in energy section.

A phacoemulsification system includes a phacoemulsification handpiece including a cutting tip ultrasonically vibrated by an ultrasonic transducer. A power supply is provided for driving the ultrasonic transducer at a resonant frequency of the transducer and cutting tip and varying power to the transducer, in response to loading of the cutting tip, by phase shifting voltage and current supplied to the transducer.

A thin film interleaver device is disclosed. The thin film interleaver includes thin film optics. The thin film(s) are formed such that they reflect one group of wavelengths while allowing a second group of wavelengths to pass through the thin film(s). The thin film(s) exhibit a flat top frequency response across the channel bandwidths of the multiplexed signal for which the thin film filter is designed such that the thin film interleaver is less sensitive to wavelength drift and temperature variations.

A high current RF choke network comprising a high current RF choke combined with an all-pass T-bridge filter. The high current RF choke may be connected to a grounded capacitor in the serial branch of the all-pass filter. In this case the parasitic capacitance of the RF choke practically becomes an integral part of the all-pass filter capacitor. The added capacitance in parallel to the parasitic capacitance of the high current RF choke practically neutralizes the resonances of the high current RF choke and thus extends significantly the operating frequency range of the network. The operating frequencies bandwidth range of the high current RF choke network is extended from the legacy range of 5 MHz to 1 GHz up to an extended range of at least 5 MHz to 3 GHz.

The present invention relates to a gas scintillation based fission neutron detector. The detector comprises a detector barrel, an entrance window hermetically arranged at the front end face of the detector barrel, an exit window hermetically arranged at the rear end face of the detector barrel, two quartz windows arranged at two lateral surfaces of the detector barrel, at least two target stands fixed in the detector barrel, fission targets suspended on the corresponding target stands, two photoelectric detectors arranged outside the two quartz windows respectively, a charging tool communicated with the detector barrel, and scintillation gas filled in a barrel core; and the scintillation gas adopts inert gas or nitrogen. The gas scintillation based fission neutron detector solves the technical problems of low neutron / gamma resolving power and low neutron sensitivity in the conventional neutron detector, and has the advantages of smooth fast neutron energy response and quick time response.

The invention belongs to the field of underwater acoustic equipment, and discloses a cylindrical flextensional acoustic pressure hydrophone which comprises a piezoelectric crystal pile formed by coaxially superposing eight piezoelectric ceramic rings. An upper aluminum alloy cover plate and a lower aluminum alloy cover plate are respectively arranged on and below the piezoelectric crystal pile andare connected with the piezoelectric crystal pile through transition bodies; an aluminum alloy shell is further arranged outside the side face of the piezoelectric crystal pile. The aluminum alloy shell is connected with the upper aluminum alloy cover plate and the lower aluminum alloy cover plate to form a surrounding space in a surrounding mode and thus a concave barrel type flextensional transducer structure is formed. In addition, an aluminum alloy receiving surface is further arranged outside the aluminum alloy shell. As for the projection of the aluminum alloy receiving surface on the plane perpendicular to the central axis, the outer edge of the projection is circular or regular n-sided. The cylindrical or approximately cylindrical flextensional acoustic pressure hydrophone is obtained by improving the structures, the arrangement modes, the materials and the like of all components in the hydrophone and is a two-dimensional omnidirectional acoustic pressure hydrophone and has high receiving sensitivity in a low frequency band.

The invention relates to a neutron detector based on a polyethylene combined gas scintillator. The neutron detector comprises a cylinder body, an incidence window, an emergence window, a first conversion target, a second conversion target, a quartz window, a photoelectric detector, a sleeve, a gas-filling device and a scintillation gas, wherein the incidence window is hermetically arranged on the front end face of the cylinder body; the emergence window is hermetically arranged on the rear end face of the cylinder body; the first conversion target and the second conversion target are arranged on the inner side of the incidence window sequentially; the quartz window is arranged on the side of the cylinder body; the photoelectric detector is arranged outside the quartz window; the sleeve is used for connecting the photoelectric detector with the cylinder body; the gas-filling device is communicated with the cylinder body; and the scintillation gas is filled in the cylinder body. The invention aims to provide the neutron detector based on the polyethylene combined gas scintillator, which can measure the neutron injection quantity in a low-intensity neutron / gamma mixed radiation field. The detector has flat response on the energy of neutron of 1 to 15 MeV and has high resolving property on fast neutron / gamma.