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40results about How to "Improve power handling capacity" patented technology

High-frequency surface acoustic wave resonator and preparation method thereof

The invention provides a high-frequency surface acoustic wave resonator and a preparation method thereof. The high-frequency surface acoustic wave resonator comprises a high-wave-velocity supporting substrate, a piezoelectric film located on the upper surface of the high-wave-velocity supporting substrate and a top electrode located on the upper surface of the piezoelectric film, wherein the wavevelocity of bulk waves propagated in the high-wave-velocity support substrate is greater than the wave velocity of target elastic waves propagated in the piezoelectric film. According to the high-frequency surface acoustic wave resonator and the preparation method thereof provided by the invention, the problem that the working frequency of an existing surface acoustic wave resonator is relativelylow is solved.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Integrated tile active phased-array antenna

The invention discloses an integrated tile active phased-array antenna. The antenna comprises an array antenna layer, a heat dissipation cavity, a radio frequency layer, a transition layer, a power supply and control layer and a cover plate layer. A plurality of first slots are formed in one side, close to the transition layer, of the radio frequency layer, first radio frequency chips are arrangedin the first slots, a plurality of second slots are formed in one side, close to the transition layer, of the power supply and control layer, and second radio frequency chips are arranged therein; acontrol device is arranged on one side, close to the cover plate layer, of the power supply and control layer and used for power supply and signal control; the transition layer plays a role in radio frequency signal transition and radio frequency isolation; the array antenna layer is electrically connected with the radio frequency layer at high frequency through a first radio frequency connectionstructure arranged on the heat dissipation cavity; the radio frequency layer is electrically connected with the power supply and the control layer at high frequency through a second radio frequency connection structure arranged on the transition layer; the cover plate layer is electrically connected with the power supply and control layer. According to the antenna, the multi-channel, multi-polarization or multi-frequency multifunctional high-integration integrated design is achieved, the overall size is small, the weight is light, and the thickness is small.
Owner:成都雷电微力科技股份有限公司

Surface acoustic wave filter with high power endurance

The invention discloses a surface acoustic wave filter with high power endurance, which comprises a plurality of surface acoustic wave resonators, wherein each of the surface acoustic wave resonators comprises an interdigital transducer and a reflecting grating; at least part of surface acoustic wave resonators are high-resistance surface acoustic wave resonators; two interdigital transducers are arranged in parallel for the high-resistance surface acoustic wave resonators; two reflecting gratings are shared by two interdigital transducers; an output bus bar of a first interdigital transducer is electrically connected with an input bus bar of a second interdigital transducer; the input bus bar of the first interdigital transducer and the output bus bar of the second interdigital transducer are located at the same end; and the two reflecting gratings are located outside the two interdigital transducers. Under same resistance, the high-resistance surface acoustic wave resonators have more finger pairs or shorter pore diameters, the current on each transducer finger is reduced, and the power endurance of the surface acoustic wave filter is greatly increased under the condition of unchanging the electric property of the surface acoustic wave filter.
Owner:中电科芯片技术(集团)有限公司

Phased array radar strong electromagnetic pulse shield

The invention discloses a phased array radar strong electromagnetic pulse shield, including more than one protective layer and support structure layers located at two sides of the protective layers; each protective layer includes a frequency selection layer, semiconductor diodes loaded on the frequency selection layer and a direct current bias module connected with a radar transmitter, wherein the direct current bias module is connected with the frequency selection layer; the frequency selection layer includes an upper conducting layer, a substrate and a lower conducting layer, wherein the upper conducting layer includes upper conducting layer units, and the lower conducting layer includes lower conducting layer units; each upper conducting layer unit includes a metal square frame in which four square metal sheets are arranged, and a rectangular metal sheet is arranged between adjacent metal sheets; 16 semiconductor diodes are arranged on each upper conducting layer unit, wherein 8 semiconductor diodes are located between the rectangular metal sheets and the square metal sheets, and 8 semiconductor diodes are located between the square metal sheets and the metal square frame; and the lower conducting layers include cross-shaped metal sheets. The phased array radar strong electromagnetic pulse shield provided by the invention can effectively protect a phased array radar.
Owner:CHINA SHIP DEV & DESIGN CENT

Optical isolation method and optical isolation device

InactiveCN103913857AReduce package sizeReduced Clear Aperture RequirementsNon-linear opticsOptical polarizationFaraday rotator
The invention discloses an optical isolation method. Forward light is split into two polarized light components in a polarization light-splitting device at the incident end, light paths of the two polarized light components are intersected after the two polarized light components are emergent from the polarization light-splitting device at the incident end, a polarization rotator is arranged at the intersection, the two polarized light components are intersected in internal space of the polarization rotator, backward light after passing the polarization rotator deflects angularly and deflect parallelly in the polarization light-splitting device at the incident end, and the backward light is separated from the forward light paths. The invention further discloses an optical isolation device which comprises an input optical fiber, an output optical fiber, two collimating lenses, two polarization light-splitting devices and one polarization rotator. Power bearing capacity can be improved, requirements on clear aperture of the Faraday rotator are lowered, and package size of the device is reduced.
Owner:浙江奥智光电科技有限公司

Ultra-wide-band double-ring high-power ferrite phase shifter

The invention discloses an ultra-wide-band double-ring high-power ferrite phase shifter and belongs to the field of phase shifters. The phase shifter comprises a dielectric slab, ferrites and a waveguide; the upper and lower surfaces of the dielectric slab are respectively provided with two ferrite layers in sequence; exciting wires penetrate through the two ferrite layers; a first-grade matched dielectric and a second-grade matched dielectric are arranged in an inner chamber of the waveguide; the two ends of the dielectric slab and the two ends of the ferrites are both sequentially connected with the first matched dielectric and the second matched dielectric. The phase shifter is as high as 33% in frequency band width, smaller than 1dB in loss, smaller than 1.5 in standing-wave ratio and larger than 420 degrees in phase shift; meanwhile, the double-ring high-power ferrite phase shifter is in a structural form that a ceramic dielectric is loaded between double ferrite rings, so that the phase shifter has the advantages of high power bearing capacity, low insertion loss, wide frequency band and high finished product rate in processing and lot production.
Owner:南京国睿微波器件有限公司

Yttrium iron garnet ferrite material and preparation method thereof

An yttrium iron garnet ferrite material and a preparation method thereof are disclosed. The chemical formula of the material is Y<3-x-y-z>GdxCayCuzFe<5-a-b-c>InaVbAlcO12. The preparation method mainlyincludes mixing ball milling; pre-firing; secondary ball milling; granulation molding; and sintering. The main advantages are that the prepared ferrite material has fine and uniform grains, which helps to obtain a dense microstructure, thereby improving the high-power endurance of the material; the material is suitable for the use of various high-power isolators in communication base stations; through Cu<2+> doping, the sintering temperature of the material is reduced properly, which is beneficial to material mass production.
Owner:南京大成材料科技有限公司

Phase change cooling-based optical fiber cooling device for fiber laser

The invention relates to a phase change cooling-based optical fiber cooling device for a fiber laser. The device comprises a cooling heat sink (1). An optical fiber groove (12) is arranged on the cooling heat sink (1). A gain optical fiber (13) of which the coating layer is removed is fixed in the optical fiber groove (12). The device is characterized in that the a phase change material (14) fillsaround the gain optical fiber (13) in the optical fiber groove (12) and completely wraps the gain optical fiber (13) in the optical fiber groove (12); a cooling water channel (11) is arranged insidethe cooling heat sink (1); and the cooling water channel (11) is located below the optical fiber groove (12). In addition to the functions of a conventional fiber optic cooling heat sink, the phase change cooling-based optical fiber cooling device of the invention has the functions of preventing sudden temperature change and enduring higher power. With the device adopted, the capability of a fiberlaser system to withstand high-power can be increased, the risks of sudden temperature change can be reduced, and the reliability of the system can be ensured.
Owner:CHINA WEAPON EQUIP RES INST

Microwave and continuous-wave high-power amplitude limiter

ActiveCN106100600AImprove reliabilityReduce the design requirements of continuous wave withstand powerLimiting amplitudeAudio power amplifierEngineering
The invention discloses a novel microwave and continuous-wave high-power amplitude limiter. The novel microwave and continuous-wave high-power amplitude limiter comprises a microwave power coupler, a microwave power detector, a detection signal amplifier, a threshold comparator, a PIN switch driver, a microwave high-power PIN switch and a PIN pulse amplitude limiter; the output end of the microwave power coupler is respectively connected to the input end of the microwave high-power PIN switch and the input end of the microwave power detector; the microwave power detector is connected to the input end of the PIN pulse amplitude limiter through the detection signal amplifier, the lagging threshold comparator, the PIN switch driver and the microwave high-power PIN switch sequentially; the design requirement of continuous-wave high-power PIN pulse amplitude limiting is reduced; the power bearing capability of a microwave receiving system to microwave and continuous-wave or broad-pulse broad-power signals can be improved; the problem that the bearing power of the traditional microwave and continuous-wave high-power amplitude limiter can be solved; and the reliability of the microwave receiving system is improved.
Owner:南京恒电先进微波技术研究院有限公司

Spinel Li-series ferrite material for x-band to millimeter wave-band lock phase shifter

ActiveCN109437879ALow electromagnetic loss characteristicsLower sintering temperatureWaveguide type devicesRemanenceMicrowave
The invention discloses a spinel Li-series ferrite material for an x-band to millimeter wave-band lock phase shifter, which has a chemical formula: Li0.5(1-a+b-c-d-e)ZnaMgeTibCucCodBinMnmFe0.5(5-a-3b-c-d-e)-m-n-sigma O4, wherein a is more than or equal to 0 and less than or equal to 0.4; b is more than or equal to 0 and less than or equal to 0.5; c is more than or equal to 0.002 and less than or equal to 0.006; d is more than or equal to 0.002 and less than or equal to 0.008; e is more than or equal to 0 and less than or equal to 0.5; m is more than or equal to 0.03 and less than or equal to 0.08; n is more than or equal to 0.002 and less than or equal to 0.006; sigma is an iron lack amount, and is more than or equal to 0.02 and less than or equal to 0.08. According to the spinel Li-seriesferrite material, a small amount of Cu<2+> replaces Li<1+> and Fe<3+> of the Li0.5Fe2.5O4 system, thereby reducing the coercive force of the material and increasing the remanence ratio of the material; an appropriate amount of Co<3+> is added for improving the power bearing capacity of the material. When the residual magnetic induction intensity Br of the microwave ferrite material is between 148mT and 343 mT, the spin wave line width deltaHk is 400 to 800 A / m, the coercive force Hc is less than or equal to 80 A / m, the remanence ratio R is 0.89 to 0.96, and the Curie temperature Tc is 450 to500 DEG C; moreover, the material has low electromagnetic loss characteristics and can be applied to the x-band to millimeter wave-band high-power lock phase shifter.
Owner:SOUTHWEST INST OF APPLIED MAGNETICS

High-performance piezoelectric ceramic and preparation method thereof

The invention discloses a high-performance piezoelectric ceramic and a preparation method thereof. The chemical general formula is Pb<n>Sr<m>(Mg<1 / 3>Nb<2 / 3>) Zr<y>Ti<x>O<3>+g%CeO<2>+h%PbO+b%CuO+d%Nb<2>O<5>, in the formula, 0.927 < = n < = 0.976, 0.024 < = m < = 0.073, 0.25 < = z < = 0.25, 0.35 < = y < = 0.35, 0.50 < = x < = 0.60, 0.4<=g<=0.7, 0.1<=h<=0.3, 0.1<=b<=0.3, 0.1<=d<=0.3. According to thepreparation method, Pb(Mg<1 / 3>Nb<2 / 3>)O<3> is synthesized, and adding into a PZT system is adopted to realize high intensity. The prepared product is high in density, high in power, high in efficiency, and high in quality. The piezoelectric ceramic is a modified hard PZT system piezoelectric ceramic, has high power bearing capacity and high comprehensive performance, can meet the requirements ofpeople, is extremely suitable for power type transducers with extremely high power and high driving requirements, and can be widely applied to sensors with extremely high power requirements such as high-power sound wave welding and fishery group detection.
Owner:李茂洪

Microstrip thin-film resistor and waveguide power synthesis network thereof

The invention provides a microstrip thin-film resistor and a waveguide power synthesis network thereof, which can solve the problems of power synthesis and miniaturization of a power amplifier. The microstrip thin-film resistor comprises a ceramic substrate, a TaN resistor and a microstrip probe, the TaN resistor and the microstrip probe are arranged on the ceramic substrate, the TaN resistor clings to the edge of the ceramic substrate, the TaN resistor is connected with the microstrip probe, and the microstrip probe extends to the opposite edge of the ceramic substrate. The waveguide power synthesis network comprises a power distribution network, a power amplifier module and a power synthesis network, the power distribution network divides microwave signals into N paths of signals with the same amplitude and the same phase, each path of signals is amplified by the power amplifier module and then fed into the power synthesis network, and the microstrip thin-film resistor is arranged atthe joint of the power distribution network and the power synthesis network.
Owner:成都玖信科技有限公司

Beam combiner and laser comprising same

The present invention is suitable for the laser technology field, and provides a beam combiner. The beam combiner comprises a dual fiber collimator, a single fiber collimator and an optical filter. The dual fiber collimator comprises input fibers configured to transmit pump light, active fibers configured to perform light amplification and a first lens in non-interface welding with the end portions of the input fibers and the active fibers, wherein the welding end of the first lens is a plane, one end opposite to the welding end is a curve, the optical filter is arranged on the output light path of the curve, the pump light is reflected to the active fibers and transmits signal light, the single fiber collimator comprises output fibers and a second lens in non-interface welding with the end portion of the output fibers, and the non-welding end of the first lens is opposite to the non-welding end of the second lens. Because there is no interface between each fiber and each lens, there is no attenuation when the pump light and the signal light are transmitted between the fibers and the lens, and the optical coupling efficiency is high; the power bearing capacity is high, and the high-power transmission is realized; a fiber fusion-elongation technology is not employed, the fiber performance itself can be maintained, the pump conversion efficiency is high, and the product performance is stable.
Owner:深圳朗光科技有限公司

Quantum dot LED packaging device and manufacturing method thereof

The invention discloses a quantum dot LED packaging device and a manufacturing method thereof. The device mainly comprises a quantum dot material or a mixture of quantum dots and fluorescent powder which is positioned between two layers of glass, or is protected by at least upper-layer glass, epoxy resin or other protective materials which are coated on the peripheral edge between the pieces of glass, an inverted LED chip which is bonded on the lower surface of the glass layer, a film layer and water glue coated at the periphery of the inverted LED chip, wherein the water glue is used for sealing the quantum dot material into a closed cavity formed by an upper layer of glass, a lower layer of glass, epoxy resin or other protective materials, and after the lower surface of the glass is bonded to the upper surface of the flip LED chip, the periphery of the whole structure is coated with the white glue. On the basis of ensuring the light emitting uniformity, the use amount of the quantumdot material is reduced, and water and oxygen isolation sealing is realized, so that the material failure is reduced, the device stability is improved, in addition, the chip light emitting utilizationrate is improved, the light effect, the power bearing capability, the device adaptability and the service life are improved, and the cost is reduced.
Owner:SHINEON BEIJING TECH

High-power superconduction filter with superimposed structure

The invention relates a high-power superconduction filter with a superimposed structure, which belongs to the technical field of microwave engineering. The filter comprises an incoming feeder installed in an encapsulation box, an outgoing feeder and a plurality of components, wherein, the components are opposite up and down and are put in a staggered manner; and each component comprises one or more harmonic oscillators which are arrayed sequentially and arranged on a substrate. The designed high-power superconduction filter is not limited by the size of a thin film superconductor, so that the superconduction filter with higher order and larger power bearing capacity can be prepared by using the thin film superconductor with limited size, so as to increase the power bearing capacity and the frequency response characteristic of the superconduction filter.
Owner:TSINGHUA UNIV

Vibrating diaphragm component processing device and processing method

The invention relates to a vibrating diaphragm component processing device and processing method. The vibrating diaphragm component processing device comprises a bottom plate, a heating base arrangedbelow the bottom plate, a template sleeve fixedly arranged on the upper surface of the bottom plate, a processing die head fixedly arranged in the template sleeve, and an air pressure cavity that is mutually covered with the template sleeve to form a closed space, wherein a to-be-processed diaphragm is placed between the template sleeve and the air pressure cavity, the heating base is used for generating heat to soften the diaphragm, the air pressure cavity is used for forming a high pressure to fixedly attach the diaphragm to the upper surface of the processing die head, a steel ring is sleeved on the upper surface of the processing die head, the steel ring is glued with the lower surface of the diaphragm, and the steel ring is used for preventing the diaphragm in the processed vibratingdiaphragm component from shrinking. The vibrating diaphragm component manufactured by the vibrating diaphragm component processing device provided by the invention has the advantages of good power bearing capacity and waterproof performance.
Owner:JIANGXI LIANCHUANG HONGSHENG ELECTRONICS

Schottky diode and preparation method thereof

The invention relates to a Schottky diode and a preparation method thereof. A Schottky diode includes: a substrate layer; a first structure and a second structure which are located on the substrate layer, wherein an isolation groove structure is arranged between the first structure and the second structure, the first structure comprises a first main body region and a cantilever beam extending fromthe first main body region, the second structure comprises a second main body region, and the second main body region comprises a heavily doped layer located on the substrate layer and a lightly doped layer located on the heavily doped layer; and a Schottky contact structure including a contact metal layer on the lightly doped layer and connected to an end portion of the cantilever beam and a passivation layer on the lightly doped layer and surrounding the contact metal layer, wherein the heavily doped layer has one or more regions in a position corresponding to the contact metal layer, the one or more regions being in contact with the lightly doped layer and forming depletion regions at the contact interface with corresponding regions of the lightly doped layer.
Owner:NUCTECH CO LTD

Device and method for inhibition of second resonance mode of vibrating diaphragm

The invention relates to a device and a method for inhibition of a second resonance mode of a vibrating diaphragm. The method is realized through a psychoacoustic phenomenon of so-called virtual pitch or fundamental tone missing, and comprises the following steps: extracting signals in a position with a frequency of resonance of an inherent low frequency, generating a harmonic wave of signals in the frequency band, and sending a harmonic signal, thereby achieving a psychological sense similar to a psychological sense to signals in the original frequency band. Simultaneously, the invention can prevent the damage to the vibrating diaphragm due to the high vibrating amplitude of the vibrating diaphragm when the signals are strong in the position with the frequency of resonance of the inherent low frequency. Since the harmonic wave of the tone is applied to substitute tones of all frequencies when the audio signal appears and no micro speaker is used, the invention enhances the power bearing capacity of the vibrating diaphragm and effectively improves the performance of the sounding device.
Owner:AAC TECH PTE LTD +1

30W 12db aluminum nitride ceramic substrate attenuation slice

The invention discloses a 30W 12db aluminum nitride ceramic substrate attenuation slice which comprises an aluminum nitride ceramic substrate with the dimension of 5*5*1MM; the back conduction layer is printed on the back side of the aluminum nitride ceramic substrate; a leading wire and resistors are printed on the front side of the aluminum nitride ceramic substrate; the resistors are connected through the leading wire to form a TT-type attenuation circuit; the attenuation circuit is symmetrical along the central line of the aluminum nitride ceramic substrate; the output end and the input end of the attenuation circuit are respectively connected with a bonding pad; the two bonding pads are symmetrical along the central line of the aluminum nitride ceramic substrate. All performance indexes of the attenuation slice are fully considered in design, high frequency and non-inductance are achieved, the situation that the original attenuation slice is only applied to be in low frequency state is broken, the application requirement of the current 3G network can be met, and meanwhile, the series product line of the fixed resistor type attenuation slice is extended.
Owner:苏州市新诚氏通讯电子股份有限公司

Thin-film low resistor and L-type resistor adjusting method therefor

The invention discloses a thin-film low resistor and an L-type resistor adjusting method therefor and relates to the technical field of electronic products. The method comprises the steps of (S1) cutting a linear resistor fine-adjusting port in the position, close to a first end face electrode, of a first side end, wherein the extension direction of the resistor fine-adjusting port is parallel tothe first side end and the vertical interval between the resistor fine-adjusting port and the first end face electrode is 0.2-0.4mm; (S2) cutting an L-type resistor coarse-adjusting port in the position, close to a second end face electrode, of a second side end, wherein the resistor coarse-adjusting port is provided with communicating horizontal adjusting port and vertical adjusting port; the extension direction of the horizontal adjusting port is parallel to the second side end; the extension direction of the vertical adjusting port is vertical to the second side end; the vertical adjustingport extends along the direction far away from the second side end; and the vertical interval between the horizontal adjusting port and the second end face electrode is 0.2-0.4mm; and (S3) debugging the thin-film low resistor at the positions of the resistor fine-adjusting port and the resistor coarse-adjusting port. The thin-film low resistor prepared by adopting the method is high in heat dissipation capability.
Owner:CHINA ZHENHUA GRP YUNKE ELECTRONICS

A high-power optical fiber acousto-optic modulator and fiber laser

The invention belongs to the field of optics and provides an optical fiber acoustic optical modulator. The optical fiber acoustic optical modulator comprises an acoustic optical crystal, a first optical fiber collimator and a second optical fiber collimator, wherein the first optical fiber collimator and the second optical fiber collimator are positioned at two sides of the acoustic optical crystal, the second optical fiber collimator comprises a lens, a two-hole capillary and an outer sealing glass tube, one end, near the acoustic optical crystal, of the lens is a spherical surface, the other end of the lens is an 8-degree inclined surface, one end of the two-hole capillary is an 8-degree inclined surface, and the lens and the two-hole capillary realize the butt joint through the 8-degree inclined surface; the parallel leaned first and second optical fibers are accommodated in the two-hole capillary, the diameter of the first and second optical fibers is 0.125mm, the lens is made of N-SF11, the length of the lens is 10.49 to 10.5mm, and the curvature radius of the spherical surface is 4.94mm. The optical fiber acoustic optical modulator adopts two fiber collimators as receiving components of zero-level light and first-level light so that the zero-level light and the first-level light are precisely coupled to the first and second optical fibers. The optical fiber acoustic optical modulator has the advantages that the product length is shortened, the power bearing capability is improved, the overheating problem of the acoustic optical modulator is solved, and the product reliability is improved.
Owner:深圳朗光科技有限公司

Spinel Li-series ferrite materials for X-band to mm-wave band lock-in phase shifters

ActiveCN109437879BLower sintering temperatureReduce the anisotropy constantWaveguide type devicesRemanenceMicrowave
The invention discloses a spinel Li-based ferrite material used for a lock-type phase shifter from the x-band to the millimeter-wave band, and its composition chemical formula is Li 0.5(1‑a+b‑c‑d‑e) Zn a Mg e Ti b Cu c co d Bi n mn m Fe 0.5(5‑a‑3b‑c‑d‑e)‑m‑n‑δ o 4 , where: 0≤a≤0.4, 0≤b≤0.5, 0.002≤c≤0.006, 0.002≤d≤0.008, 0≤e≤0.5, 0.03≤m≤0.08, 0.002≤n≤0.006, δ is iron deficiency , 0.02≤δ≤0.08. The present invention uses a small amount of Cu 2+ Replace Li 0.5 Fe 2.5 o 4 Department of Li 1+ and Fe 3+ , which reduces the coercive force of the material and increases the remanence ratio of the material; adding an appropriate amount of Co 3+ , improve the power bearing capacity of the material. Realized the residual magnetic induction of microwave ferrite material B r Between 148mT and 343mT, the spin wave linewidth ΔH k 400~800A / m, coercive force H c ≤80A / m, remanence ratio R is 0.89~0.96, Curie temperature T c The temperature is 450°C to 500°C. At the same time, the material has low electromagnetic loss characteristics and can be used for high-power lock-in phase shifters from the x-band to the millimeter-wave band.
Owner:SOUTHWEST INST OF APPLIED MAGNETICS

Strip line circulator and TR assembly

The invention provides a strip line circulator and a TR assembly. The strip line circulator comprises a first shell; the second shell is used for being assembled with the first shell; the cover body is used for being assembled with the second shell; a first cavity is formed between the first shell and the second shell; a second cavity is formed between the second shell and the cover body; the first cavity is internally provided with two ferrite gyromagnetic sleeve sheets and a central conductor located between the two ferrite gyromagnetic sleeve sheets; a uniform magnetic sheet and a permanent magnet are sequentially arranged in the second cavity; the ferrite gyromagnetic sleeve sheet comprises a ferrite wafer and a heat conduction circular ring fixed on the edge of the ferrite wafer in a surrounding manner. The strip line circulator is low in loss, small in heating value, excellent in heat dissipation performance and high in reliability under high-power electromagnetic wave signals, and can well meet the high-power requirement of a TR assembly.
Owner:BEIJING INST OF RADIO MEASUREMENT

A microwave continuous wave high power limiter

ActiveCN106100600BImprove reliabilityReduce the design requirements of continuous wave withstand powerLimiting amplitudeAudio power amplifierEngineering
The invention discloses a novel microwave and continuous-wave high-power amplitude limiter. The novel microwave and continuous-wave high-power amplitude limiter comprises a microwave power coupler, a microwave power detector, a detection signal amplifier, a threshold comparator, a PIN switch driver, a microwave high-power PIN switch and a PIN pulse amplitude limiter; the output end of the microwave power coupler is respectively connected to the input end of the microwave high-power PIN switch and the input end of the microwave power detector; the microwave power detector is connected to the input end of the PIN pulse amplitude limiter through the detection signal amplifier, the lagging threshold comparator, the PIN switch driver and the microwave high-power PIN switch sequentially; the design requirement of continuous-wave high-power PIN pulse amplitude limiting is reduced; the power bearing capability of a microwave receiving system to microwave and continuous-wave or broad-pulse broad-power signals can be improved; the problem that the bearing power of the traditional microwave and continuous-wave high-power amplitude limiter can be solved; and the reliability of the microwave receiving system is improved.
Owner:南京恒电先进微波技术研究院有限公司

A Surface Acoustic Wave Filter with High Power Capability

ActiveCN103078603BRich pore sizeMultiple logarithmic or shorter aperturesImpedence networksHigh resistanceGrating
The invention discloses a surface acoustic wave filter with high power endurance, which comprises a plurality of surface acoustic wave resonators, wherein each of the surface acoustic wave resonators comprises an interdigital transducer and a reflecting grating; at least part of surface acoustic wave resonators are high-resistance surface acoustic wave resonators; two interdigital transducers are arranged in parallel for the high-resistance surface acoustic wave resonators; two reflecting gratings are shared by two interdigital transducers; an output bus bar of a first interdigital transducer is electrically connected with an input bus bar of a second interdigital transducer; the input bus bar of the first interdigital transducer and the output bus bar of the second interdigital transducer are located at the same end; and the two reflecting gratings are located outside the two interdigital transducers. Under same resistance, the high-resistance surface acoustic wave resonators have more finger pairs or shorter pore diameters, the current on each transducer finger is reduced, and the power endurance of the surface acoustic wave filter is greatly increased under the condition of unchanging the electric property of the surface acoustic wave filter.
Owner:CETC CHIPS TECH GRP CO LTD

Optical isolation method and device

InactiveCN103913857BReduce package sizeReduced Clear Aperture RequirementsNon-linear opticsEngineeringOptical polarization
The invention discloses an optical isolation method. Forward light is split into two polarized light components in a polarization light-splitting device at the incident end, light paths of the two polarized light components are intersected after the two polarized light components are emergent from the polarization light-splitting device at the incident end, a polarization rotator is arranged at the intersection, the two polarized light components are intersected in internal space of the polarization rotator, backward light after passing the polarization rotator deflects angularly and deflect parallelly in the polarization light-splitting device at the incident end, and the backward light is separated from the forward light paths. The invention further discloses an optical isolation device which comprises an input optical fiber, an output optical fiber, two collimating lenses, two polarization light-splitting devices and one polarization rotator. Power bearing capacity can be improved, requirements on clear aperture of the Faraday rotator are lowered, and package size of the device is reduced.
Owner:浙江奥智光电科技有限公司

Phased array radar strong electromagnetic pulse shield

The invention discloses a strong electromagnetic pulse shield for phased array radar, which comprises more than one protective layer and support structure layers located on both sides of the protective layer; the protective layer includes a frequency selective layer, a semiconductor diode loaded on the frequency selective layer, A DC bias module connected to the radar transmitter, the DC bias module is connected to the frequency selection layer; the frequency selection layer includes an upper conductive layer, a substrate and a lower conductive layer, and the upper conductive layer includes an upper conductive layer unit; the lower conductive layer includes The lower conductive layer unit; the upper conductive layer unit includes a metal square frame, four square metal sheets are arranged in the metal square frame, and rectangular metal sheets are arranged between adjacent metal sheets; each upper conductive layer unit has 16 said Semiconductor diodes; wherein, 8 semiconductor diodes are located between the rectangular metal sheet and the square metal sheet, and 8 semiconductor diodes are located between the square metal sheet and the metal frame; the lower conductive layer unit includes a cross metal sheet. The invention can effectively protect the phased array radar.
Owner:CHINA SHIP DEV & DESIGN CENT

A radio frequency front-end electromagnetic pulse protection module

The invention discloses a radio-frequency front-end electromagnetic pulse protection module, which comprises a primary high-power limiting module, wherein the primary high-power limiting module comprises multiple layers of coaxial protection membrane and a directional coupler; each layer of protection membrane is formed by protection chains, which encircle a circle center and are radially distributed on a coaxial printed circuit board and a circuit board; round magnetic rings sleeved on a coaxial inner conductor are arranged at two sides of each protection membrane; a nonlinear passive protection device used for pulse voltage suppression is distributed on each protection chain; the directional coupler is formed by a coupling line parallel to the coaxial inner conductor and a radio-frequency output joint fixed on a coaxial outer conductor. The radio-frequency front-end electromagnetic pulse protection module has 10Kw power-resistant ability, suppression degree of more than 60dB and subnanosecond response characteristic, and the problems of low bearing power, low suppression degree and slow response speed of the existing radio-frequency front-end protection module can be effectively solved.
Owner:CHINA SHIP DEV & DESIGN CENT
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