55results about How to "Increase output gain" patented technology

A flat-plate MIMO array antenna includes a substrate, a plurality of antenna elements disposed on the substrate, and at least one isolation element interposed between a plurality of antenna elements on the substrate and connected to a ground. Mutual interference between the antenna elements is prevented by the isolation element formed between the antenna elements, thereby preventing the distortion of the radiation pattern. Also, since the isolation element is grounded to the ground surface, the isolation element operates as a parasitic antenna, thereby increasing the output gain.

A flat-plate MIMO array antenna includes a substrate, a plurality of antenna elements disposed on the substrate, and at least one isolation element interposed between a plurality of antenna elements on the substrate and connected to a ground. Mutual interference between the antenna elements is prevented by the isolation element formed between the antenna elements, thereby preventing the distortion of the radiation pattern. Also, since the isolation element is grounded to the ground surface, the isolation element operates as a parasitic antenna, thereby increasing the output gain.

This invention discloses active clamp zero-voltage soft switch high gain boost staggered parallel converters including two power switch tubes, two clamp switch tubes, two clamp capacitors, two continuing flow diodes and two coupled inductors, in which, each of the two coupled inductors includes three windings, which utilizes the second and third windings of the two coupled inductors to realize high gain output of the converter, utilizes a serial circuit composed of the two clamp switch tubes and two clamp capacitors to absorb and transfer harmlessly the leak energy of the two coupled inductors and realizes turn on of zero voltage of two power switch tubes and zero voltage turn-off of them utilizing the parallel capacitors of the two switch tubes to further realize zero-voltage turn on and off of the two clamp switch tubes.

An active clamping high-gain alternate parallel voltage boosting convertor disclosed by the invention comprises two power switching diodes, two output diodes, two clamping diodes, two auxiliary power switching diodes, two clamping capacitors, two switching capacitors, an output capacitor and two coupling inductors. Two coupling inductors respectively comprise two windings. The present invention uses the second winding of two coupling inductors and two switching capacitors to realize the high-gain output of the convertor. With the leakage inductance of two coupling inductors, two clamping capacitors, the shunt capacitor existing in two power switching diodes themselves and the gate arrangement of two power switching diodes and two auxiliary power switching diodes, the zero voltage switching-on and zero voltage switching-off of two power switching diodes and two clamping diodes are realized. The soft switching-off of two output diodes and two clamping diodes are realized with the leakage inductance of two coupling inductors, and the circuit does not include energy losing element and the output gain of the convertor and the circuit efficiency can be increased.

A plate board type MIMO (multiple-input multiple-output) array antenna including a board, a plurality of antenna elements manufactured on the board, and an isolation unit offsetting effects of electromagnetic waves radiated from the plurality of antenna elements on the other antenna elements of the plurality of antenna elements. In a case where two antenna elements are used, the isolation unit may include at least one isolation element positioned within a space between the two antenna elements on the board and symmetric with respect to a center of a distance between the two antenna elements.

The invention discloses a single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation. The converter comprises a single-phase Booster circuit unit working in an input current continuous mode, a transformer voltage doubling circuit unit and an output circuit unit which are connected in turn, wherein the single-phase Booster circuit unit working in the input current continuous mode consists of an input filtering inductor, two power switching tubes, a parallel capacitor and a clamping capacitor; the transformer voltage doubling circuit unit consists of a transformer provided with two windings, a blocking capacitor, a voltage doubling capacitor and a freewheel diode; the output circuit unit consists of an output diode and an output capacitor; and an output circuit is connected with a load. The converter has the advantages of realizing zero voltage switch-on and switch-off of a first power switching tube and a second power switching tube, and reducing input current ripple along with simple circuit structure, convenient control and suitability for high efficiency conversion occasions of solar energy distributed power generation.

A photo, acoustic detector (200) for detecting a concentration of a sample in a sample mixture. The photo acoustic detector (200) comprises a light source (101 ) for producing a light beam for exciting molecules of the sample and a light modulator (102) for modulating the light beam for generating pressure variations in the sample mixture, an amplitude of the pressure variations being a measure of the concentration. The photo acoustic detector (200) further comprises a detector element (103) for converting the pressure variations into a detector current and a processing section (106) for processing the detector current to generate an output signal representing the concentration. The processing section (106) comprises an integrating amplifier for integrating the detector current, the integrating amplifier being coupled to the detector element (103) via a hold switch, and a timing circuit for generating a hold signal, SWHOLD, for operating the hold switch in order to couple the integrating amplifier to the detector element (103) during a predetermined interval of a period of the detector current.

The invention discloses a sound receiving system. Output ends of a plurality of basic array devices are connected with filters respectively, output ends of a plurality of filters are connected with an input end of a second sound mixing output device, each of the basic array devices comprises a microphone array which comprises a plurality of microphones, the plurality of microphones are longitudinally arranged sequentially along a straight line, the spacing distance between two adjacent microphones is as follows, an output end of each of the microphones is connected with a time-delay circuit respectively, output ends of a plurality of time-delay circuits are connected with an input end of a first sound mixing output device, and the delay time of the i time-delay circuit is the sum of the delay time of the last time-delay circuit and (n-i) times of the unit time. By the aid of the sound receiving system, within the set frequency bandwidth, the output gain which can improve positive acoustic wave excitation can be achieved, the output gain of non-positive acoustic waves can be greatly restrained, and required directivity characteristics can be obtained. The sound receiving system is widely used in the pickup (sound transmission) field.

The invention belongs to the field of high-performance terahertz radiation sources, and provides an extended interaction klystron and a production method thereof. The extended interaction klystron comprises an input resonant cavity, an output resonant cavity, and N intermediate resonant cavities. The input resonant cavity is communicated with an input waveguide. The output resonant cavity is communicated with an output waveguide. Electron beam channels communicated with one another are arranged at the centers of the input resonant cavity, the output resonant cavity and the N intermediate resonant cavities. The cycle lengths of the resonant clearances of the N intermediate resonant cavities are different or partially different. N is a positive integer greater than 1. The problem that the existing extended interaction klystron has a very narrow working band and high in-cavity power density is solved. An electron beam is tuned by different resonant frequencies when passing through the intermediate resonant cavities. Thus, the working bandwidth of the whole device is improved.

The invention discloses an active clamping high gain boost converter using a coupling inductor. The converter comprises a power switch tube, a clamping switch tube, a fly-wheel diode, a clamping capacitor, an output filtering capacitor and the coupling inductor with two windings. In the invention, the coupling inductor is used to increase the gain of the converter; a clamping circuit formed by the clamping switch tube and the clamping capacitor is used to absorb a turn-off voltage spike of a main power switch tube, realize lossless transfer of energy and reduce a voltage stress of the main power switch tube, wherein the turn-off voltage spike of the main power switch tube is caused by a leakage inductor. Because the structure of the circuit is simple, cost is low and control is convenient, the boost power supply converter has an important popularization value. The boost converter of the invention can replace the existing boost converter and can be used for a booster type power supply and the like.

The invention discloses an implementation method of a programmable general digital quantity I / O signal conditioning. The method comprises the following steps: for an output signal conditioning in a general digital signal, adopting a first MCU processing unit and an isolating electronic switching circuit to implement a both-way flow channel of an external output signal; for the access of a plurality of different voltage digital signals, implementing the output conditionings of different voltages by controlling the isolating electronic switching circuit through the first MCU processing unit; for a multiform load signal-point output digital signal, adopting a Darlington circuit to improve the output gain so as to increase output driving capacity; and adopting the first MCU processing unit to control on-off of the isolating electronic switching circuits at different channels so as to implement the conditioning on a two-point differential output signal; for an input signal conditioning in the general digital signal, adopting a second MUC control unit to control a selector switching circuit to implement the selection of the single-point digital signal input or the two-point digital input signal, wherein the voltages, which automatically acquire the external input signal, of the second MCU control unit automatically select different driving channels to control the input signal conditionings in different current directions.

The invention provides a non-symmetric Z-source half-bridge converter with a dual output function. The converter comprises a direct-current power supply, a diode, a first capacitor, a second capacitor, a first inductor, a second inductor, a first switching tube, a second switching tube, a third switching tube, a first load and a second load. The first inductor, the second inductor, the first capacitor and the second capacitor constitute a Z source impedor. Due to the adoption of the Z source impedor, damage caused by direct connection of the switching tubes is avoided, and a boosting effect can be achieved when direct connection of the switching tubes happens. Two-way output boosting and step-down can be respectively controlled by controlling the switch-on time and duty ratio of the three switching tubes, and symmetry and asymmetry of positive pulses and negative pulses of two-way output voltages can be achieved. Only three switching tubes are used, it is not needed that capacitors are connected on a power supply side in parallel, and dual-way output can be achieved. The non-symmetric Z-source half-bridge converter with the dual output function has the advantages of being high in reliability, wide in output voltage range and rich in output alternating current pulse waveform and is particularly suitable for dual-output electrochemistry power supply devices for electrolysis, electroplating and other electrochemistry aspects.

The invention provides a gamma source inverter based on a switch capacitor and a modulation method, belonging to the technical field of inverters. The problem that the boosting capability of a Z-source inverter in the prior art is limited by straight-through ratio and modulation degree, and when the inverter is started, large resonance current is generated to cause the damage of the device. The gamma source inverter comprises a three-phase inverter, an output filter and a gamma source network module based on the switch capacitor; and the voltage output by a direct-current power supply Vdc is sequentially subjected to spatial voltage modulation by the gamma source network module based on the switch capacitor, the voltage inversion by the three-phase inverter and the filtering by the outputfilter, and a reference voltage vector Uout is output, the direct-current power supply Vdc is boosted, and power is supplied to the load. The inverter is mainly applied to a new energy power supply system.

An isolated type active clamping interlaced parallel connection AC-AC converter disclosed by the invention comprises two power switch tubes, two output diodes, two clamping diodes, one auxiliary power switch tube, one clamping capacitance, two switch capacitances, one output capacitance and two flyback transformers. The two flyback transformers respectively have two windings. The invention uses a second winding of two flyback transformers and two switch capacitances to realize improvement of the transformer output power grade. The leakage inductance energy of two flyback transformers are absorbed only using one auxiliary switch tube and one clamping capacitance, the zero voltage switch on and off of two power switch tubes and two auxiliary switch tubes are realized using the arrangement of shunt capacitances existing by the two power switch tubes selves and gates of two power switch tubes and two auxiliary switch tubes, soft switch off of the two output diodes and the two clamping diodes are realized by leakage inductances of the two flyback transformers, energy consumption elements are not existed in the circuit, thereby improving the output gain of the converter and the circuit efficiency.

The invention discloses an acoustic receiving device which comprises a microphone array, delay circuits and a mix output device. The sensor microphone comprises a plurality of microphones. The microphones are linearly, sequentially and longitudinally arrayed. Spacing distance of each two adjacent microphones in the microphone array is 1 / n*Lambada<0>. An output end of each microphone in the microphone array is connected with one delay circuit. An output end of every delay circuit is connected with an input end of the mix output device. Delay time of the i-th delay circuit is the sum of the delay time of the last delay circuit and (n-i) times of a unit time. The acoustic receiving device can increase excited output gain of positive acoustic wave and greatly suppress output gain of non-positive acoustic wave in a certain range of frequency bandwidth. In addition, the acoustic receiving device can acquire approximate directional characteristics in the range of central frequency and adjacent frequencies. The acoustic receiving device is widely applicable to the field of pick-up (sound bearing).

The invention discloses a mixed discrete-type high-nonlinearity optical fiber amplifier based on a double-feedback structure, and the amplifier comprises a plurality of light transmitters, a laser, an optical signal combiner, an Er-doped fiber, an optical signal divider, a plurality of light receivers, a first isolator, a second isolator, a first coupler, a second coupler, a first circulator, a second circulator, a polarized wave combiner, a control unit, a high-nonlinearity optical fiber, a fiber bragg grating, and a plurality of groups of pump light. A feedback ring structure is formed between the first circulator and the first coupler, and a feedback ring structure is formed between the second circulator and the first and second couplers. The first isolator is connected between the optical signal combiner and the first coupler, and the second isolator is connected between the fiber bragg grating and the optical signal divider. The amplifier is advantageous in that the utilization rate of pump power is high, the mutual interference between the pump light and signal light at front and back stages is small, the control effect is good, the raman gain coefficient is high, the integration degree is higher, and the small-scale design is facilitated better.

The invention discloses an interleaving active-clamping boosting converter which comprises two power switching tubes, two fly-wheel diodes, an auxiliary power switching tube, a clamping capacitor, an output capacitor and two coupled inductors, each provided with three windings. The boosting converter makes use of the third windings of the two coupled inductors to realize voltage gain of the converter, and employs a circuit constituted by the auxiliary power switching tube and the clamping capacitor which are connected in series to totally absorb and transfer the leakage inductance energy of the two coupled inductors and to realize no-voltage conduction on the two power switching tubes; no-voltage shutoff on the two power switching tubes is realized through the parallel capacitors of the two power switching tubes; the boosting converter realizes no-voltage conduction and no-voltage shutoff on the auxiliary power switching tube through the gate arrangement of the two power switching tubes and the auxiliary power switching tube. The boosting converter is simple in structure and has fewer assistant elements and no energy-consuming elements, which can improve the output gain of the converter and the efficiency of the circuit.

The invention discloses a method for selecting a working frequency point of a bilateral LCLC type CPT system and optimizing a pole plate voltage, and belongs to the technical field of wireless energy transmission. The system includes: a high-frequency full-bridge inverter circuit, a primary-side LCLC compensation network including a primary-side compensation inductor and a primary-side compensation capacitor, a coupling capacitor plate including two emitter plates and two receiver plates, and a secondary-side compensation inductor and a secondary Secondary side LCLC compensation network of side compensation capacitor, full bridge rectification filter circuit. This application deduces that the bilateral LCLC type CPT system can realize multiple frequency points of constant current output, select the optimal operating frequency point for the purpose of reducing the volume of the system, improve the system output gain, and broaden the load range of the system under continuous working mode ; When the system works at the optimal frequency point, the application realizes the reduction of the voltage stress of the coupling plate, the approximate zero reactive circulation of the circuit and the soft switching of the switching device by setting the parameters of the compensation network, and improves the efficiency and efficiency of the wireless power transmission system. Reliability and cost reduction.

This invention discloses active clamp zero-voltage soft switch high gain boost staggered parallel converters including two power switch tubes, two clamp switch tubes, two clamp capacitors, two continuing flow diodes and two coupled inductors, in which, each of the two coupled inductors includes three windings, which utilizes the second and third windings of the two coupled inductors to realize high gain output of the converter, utilizes a serial circuit composed of the two clamp switch tubes and two clamp capacitors to absorb and transfer harmlessly the leak energy of the two coupled inductors and realizes turn on of zero voltage of two power switch tubes and zero voltage turn-off of them utilizing the parallel capacitors of the two switch tubes to further realize zero-voltage turn on and off of the two clamp switch tubes.

A method of manufacture a transport network system includes: receiving input data having an input encoding; generating encoded data, having a transcode encoding, from the input data; generating an error correction redundancy for the encoded data; and sending an output frame, having the encoded data and the error correction redundancy, for increasing a net coding gain of the output frame based on the transcode encoding and the error correction redundancy.

The invention relates to a beam domain coherent azimuth estimation method based on fluctuated phase alignment. The method is implemented on the basis of a long-line sonar array formed by M equidistant hydrophones. The method includes the first step of conducting frequency point accumulative division on broadband array element domain signals received by the sonar array to obtain array element domain signals of single frequency points, the second step of obtaining direction guidance vectors of incoming wave signals of the sonar array, the third step of converting the array element domain signals of the single frequency points into a beam domain according to the obtained direction guidance vectors, the fourth step of conducting fluctuation coherent processing on the beam domain signals, and the fifth step of calculating a beam output energy power value of the beam domain signals subjected to fluctuation coherent processing and then realizing estimation of target azimuth. The beam domain coherent azimuth estimation method based on fluctuated phase alignment effectively improves the suppression effect of output gain and strong interference of the signals and has excellent spatial resolving capability.

An active clamping-boosting inverter of high-gain isolation type is prepared as realizing high gain output of said inverter by series-connecting the third winding to output capacity of two coupled inductances, absorbing and transferring leakage energy of two coupled inductances nondestructively by series circuit prepared by the first clamping capacity and the first auxiliary switching tube, utilizing series circuit and parallel capacity to realize zero voltage turn on and turn off of said auxiliary switch.

A photo acoustic detector for detecting a concentration of a sample in a mixture includes a light source for producing a light beam for exciting molecules of the sample, and a light modulator for modulating the light beam for generating pressure variations in the sample mixture, where an amplitude of the pressure variations is a measure of the concentration. The detector further includes a detector element for converting the pressure variations into a detector current and a processing section for processing the detector current to generate an output signal representing the concentration. The processing section includes an integrating amplifier for integrating the detector current, the integrating amplifier being coupled to the detector element via a hold switch, and a timing circuit for generating a hold signal, SWHOLD, for operating the hold switch to couple the integrating amplifier to the detector element during a predetermined interval of the detector current.

The invention discloses a single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation. The converter comprises a single-phase Booster circuit unit working in an input current continuous mode, a transformer voltage doubling circuit unit and an output circuit unit which are connected in turn, wherein the single-phase Booster circuit unit working in the input current continuous mode consists of an input filtering inductor, two power switching tubes, a parallel capacitor and a clamping capacitor; the transformer voltage doubling circuit unit consists ofa transformer provided with two windings, a blocking capacitor, a voltage doubling capacitor and a freewheel diode; the output circuit unit consists of an output diode and an output capacitor; and anoutput circuit is connected with a load. The converter has the advantages of realizing zero voltage switch-on and switch-off of a first power switching tube and a second power switching tube, and reducing input current ripple along with simple circuit structure, convenient control and suitability for high efficiency conversion occasions of solar energy distributed power generation.

The invention provides a three-energy-storage-capacitor dual-output Z source half-bridge converter which comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first inductor, a second inductor, a first switch tube, a second switch tube, a third switch tube and a diode. A first conventional half-bridge converter body is formed by the first capacitor, the second capacitor, the first switch tube and the second switch tube, a second conventional half-bridge converter body is formed by the second capacitor, the third capacitor, the second switch tube and the third switch tube, and a Z source impedance device is formed by the fourth capacitor, the fifth capacitor, the first inductor and the second inductor. The diode is used for preventing an electric current of the Z source impedance device from flowing back to a power source. According to the three-energy-storage-capacitor dual-output Z source half-bridge converter, dual-channel output is achieved only through the three switch tubes, the reliability is high, the output voltage range is wide, output alternating current pulse waveforms are abundant, and the three-energy-storage-capacitor dual-output Z source half-bridge converter is particularly suitable for dual-output occasions such as electrochemical power supply devices including electrolysis power supply devices, electroplating power supply devices and the like, and multi-output-required green energy occasions such as distributed power generation.

The invention discloses a magnetic integrated matrix transformer and an isolated DC / DC converter, and belongs to the technical field of power electronics. The magnetic integrated matrix transformer comprises a magnetic core, a primary winding, a secondary winding and a rectifying unit, the magnetic core is provided with a base, and a middle column and at least three side columns are formed on the base; at least one secondary winding is wound on the magnetic core, each secondary winding is wound on at least two adjacent side columns, and the middle column is used for winding the primary winding. On the premise that a magnetic core is not changed, the secondary winding structure of the transformer is flexibly configured, any transformer turn ratio and any secondary path number output are achieved, the size and weight of the transformer can be reduced, the power density of the converter can be improved, the frequency range requirements of the converter under different working occasions can be met, and a magnetic part has flexibility and universality. Meanwhile, when the secondary winding of the transformer is arranged in an orthogonal mode, the current sharing effect is achieved, and the good heat dissipation effect can be achieved through the metal shell wrapping the magnetic core.

The invention discloses a perimeter security radar transverse crossing target detection method and system, a medium and equipment, which belong to the technical field of radar detection, and are usedfor solving the technical problem that the existing perimeter security radar cannot effectively detect a transverse crossing target. The method comprises the steps of 1) obtaining an angle-Doppler matrix of each array element in a current coherent processing interval; 2) according to the angle-Doppler matrix, calculating a radial speed estimation value and a target angle estimation value of the target; 3) constructing a virtual array according to the radial speed estimation value and the target angle estimation value of the target, and 4) performing target detection on the virtual array. The method has the advantages that the transverse crossing target is effectively and accurately detected, vegetation clutters can be effectively suppressed, and the like.

An isolated type active clamping interlaced parallel connection AC-AC converter disclosed by the invention comprises two power switch tubes, two output diodes, two clamping diodes, one auxiliary power switch tube, one clamping capacitance, two switch capacitances, one output capacitance and two flyback transformers. The two flyback transformers respectively have two windings. The invention uses a second winding of two flyback transformers and two switch capacitances to realize improvement of the transformer output power grade. The leakage inductance energy of two flyback transformers are absorbed only using one auxiliary switch tube and one clamping capacitance, the zero voltage switch on and off of two power switch tubes and two auxiliary switch tubes are realized using the arrangement of shunt capacitances existing by the two power switch tubes selves and gates of two power switch tubes and two auxiliary switch tubes, soft switch off of the two output diodes and the two clamping diodes are realized by leakage inductances of the two flyback transformers, energy consumption elements are not existed in the circuit, thereby improving the output gain of the converter and the circuit efficiency.

A modulation method includes sampling the first input signal by using the first local oscillation signal and the second local oscillation signal to generate the first sampled signal, sampling the second input signal by using the third local oscillation signal and the fourth local oscillation signal to generate the second sampled signal, sampling the second input signal by using the first local oscillation signal and the second local oscillation signal to generate the third sampled signal, sampling the first input signal by using the third local oscillation signal and the fourth local oscillation signal to generate the fourth sampled signal, adding the first sampled signal and the second sampled signal to produce the first modulation signal, adding the third sampled signal and the fourth sampled signal to generate the second modulation signal, and adding the first modulation signal and the second modulation signal to generate an output signal.

The invention discloses high-efficiency spectrum resource sensing equipment. The high-efficiency spectrum resource sensing equipment comprises a sensing antenna, a band-pass filter, a square-law detector, an integrator and a decision device which are sequentially connected in series; the sensing antenna comprises a high gain antenna body, a low gain antenna body and a conversion device; and both the high gain antenna body and the low gain antenna body are coupled with the band-pass filter through the conversion device and controlled by the conversion device to be connected or disconnected withthe band-pass filter, the conversion device is provided with a control end, the control end is coupled with the decision device, and when the control end receives a communication signal output by thedecision device, the conversion device connects the high gain antenna body with the band-pass filter. According to the high-efficiency spectrum resource sensing equipment, by arranging the high gainantenna body, the low gain antenna body and the conversion device, the high gain can be efficiently used in the communication process, and therefore the communication quality is well guaranteed.