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 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 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.

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.

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.