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37results about How to "Broad" patented technology

Narrow-band absorptive bandstop filter with multiple signal paths

An absorptive bandstop filter includes at least two frequency-dependent networks, one of which constitutes a bandpass filter, that form at least two forward signal paths between an input port and an output port and whose transmission magnitude and phase characteristics are selected to provide a relative stopband bandwidth that is substantially independent of the maximum attenuation within the stopband and / or in which the maximum attenuation within the stopband is substantially independent of the unloaded quality factor of the resonators. The constituent network characteristics can also be selected to provide low reflection in the stopband as well as in the passband. The absorptive bandstop filter can be electrically tunable and can substantially maintain its attenuation characteristics over a broad frequency tuning range.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY

Semiconductor ferroelectric storage transistor and method for manufacturing same

Provided is a ferroelectric field effect transistor (FeFET) which has a wide memory window even if the ferroelectric film thickness is 200 nm or less, and which has excellent data retention characteristics, pulse rewriting endurance and the like. An FeFET which has a structure wherein an insulating body (11) and a gate electrode conductor (4) are sequentially laminated in this order on a semiconductor base (10) that has a source region (12) and a drain region (13). The insulating body (11) is configured by laminating a first insulating body (1) and a second insulating body (2) in this order on the base (10), and the second insulating body (2) is mainly composed of an oxide of strontium, calcium, bismuth and tantalum.
Owner:NAT INST OF ADVANCED IND SCI & TECH

High-speed optical modulator and method of modulating light by using the same

Provided are a high-speed optical modulator and a method of modulating light by using the same. The optical modulator includes first and second resonance cavities that are sequentially stacked on a transparent substrate, wherein the first and second resonance cavities each include an electric-optical layer. According to the method, first and second voltages having different sizes are simultaneously applied respectively to the first and second resonance cavities, and then for the other configuration of the modulator mutually interchanged voltages are applied.
Owner:SAMSUNG ELECTRONICS CO LTD +1

Optical devices with built-in isolators

New designs of optical devices, particularly for adding or dropping a selected wavelength or a group of wavelengths as well as multiplexing a plurality of signals into a multiplexed signal or demultiplexing a multiplexed signal into several signals are disclosed. According to one aspect of the present invention, an isolator core is built into the optical devices to stop a reflected signal from an optical file in the optical devices. As a result, the optical devices are amenable to small footprint, broad operating wavelength range, enhanced impact performance, lower cost, and easier manufacturing process.
Owner:ALLIAN FIBER OPTIC PROD INC

Method for producing synthetic rutile by using deluvial slope type ilmentie

ActiveCN101851004AWide range of applicationsGood operating environmentTitanium dioxideTarChemistry
The invention relates to a method for producing synthetic rutile by using ilmentie, in particular to a method for producing synthetic rutile by using deluvial slope type ilmentie. The method comprises the following steps of: performing reduction treatment on the deluvial slope type ilmentie, wherein reducing agents are coal, tar and the like; controlling a reduction temperature and a reduction time; performing oxidation treatment on the reduced ilmentie at the temperature of between 700 and 900 DEG C until a shell of rutile microcrystal and a ferric layer is generated on a mineral surface, wherein an oxidant is oxygen; performing atmospheric multi-segment counterflow fluidization leaching on the oxidized ilmentie by using diluted hydrochloric acid, controlling a concentration of the diluted hydrochloric acid and an acid leaching temperature, and then removing soluble impurities in the ilmentie after more than three segments of leaching; and then washing, filtering, drying and roasting the leached material after being subjected to acid leaching to obtain the synthetic rutile. The method has the advantages of preventing pulverization, keeping a crude ore grain size, along high acid leaching efficiency, high use ratio, simple process, low cost and easy operation.
Owner:CHANGSHA RES INST OF MINING & METALLURGY

Method for producing synthetic rutile by using deluvial slope type ilmentie

ActiveCN101851004BImprove distributionThe distribution is not only largeTitanium dioxideReduction treatmentOxygen
The invention relates to a method for producing synthetic rutile by using ilmentie, in particular to a method for producing synthetic rutile by using deluvial slope type ilmentie. The method comprises the following steps of: performing reduction treatment on the deluvial slope type ilmentie, wherein reducing agents are coal, tar and the like; controlling a reduction temperature and a reduction time; performing oxidation treatment on the reduced ilmentie at the temperature of between 700 and 900 DEG C until a shell of rutile microcrystal and a ferric layer is generated on a mineral surface, wherein an oxidant is oxygen; performing atmospheric multi-segment counterflow fluidization leaching on the oxidized ilmentie by using diluted hydrochloric acid, controlling a concentration of the diluted hydrochloric acid and an acid leaching temperature, and then removing soluble impurities in the ilmentie after more than three segments of leaching; and then washing, filtering, drying and roastingthe leached material after being subjected to acid leaching to obtain the synthetic rutile. The method has the advantages of preventing pulverization, keeping a crude ore grain size, along high acid leaching efficiency, high use ratio, simple process, low cost and easy operation.
Owner:CHANGSHA RES INST OF MINING & METALLURGY

Moving environment-friendly type exterior-interior aerator

The invention discloses a moving environment-friendly type exterior-interior aerator which comprises a carrier, an aeration mechanism, an axis rotation assembly and a telescopic traction rod, wherein the carrier comprises two buoys, a hoop and a steel tube belt fastener; the aeration mechanism is mounted between the two buoys through a support rod, and comprises a host machine, a motor mounted above the host machine through a support rod, an oxygen-accumulating covering cylinder mounted outside the motor and air-collecting pipes mounted at the inner sides of the two buoys; an exhaust pipe communicated with the host machine is arranged at the bottom of the oxygen-accumulating covering cylinder; the axis rotation assembly is fixed on a foundation pile in the center of a water body through an assembly base arranged at the bottom of the axis rotation assembly; two ends of the telescopic traction rod are connected with the carrier respectively through an L shaft assembly and the axis rotation assembly; and cables connected with the axis rotation assembly and the carrier are arranged on the telescopic traction rod. The aerator disclosed by the invention is applicable to oxygenation of fish ponds with different water depths, can realize oxygenation and fertilization, can improve water quality, and can be used for treating sewage and industrial waster water.
Owner:海宁经开产业园区开发建设有限公司
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