8results about How to "Increase power gain" patented technology

The invention provides a miniaturized high-power gain two-stage pulse compression energy multiplier, and belongs to the technical field of pulse compression energy multipliers, and the energy multiplier comprises a first-stage compression cavity input waveguide port which is used for receiving a radio frequency signal; the working mode of the first-stage compression cavity is TE11n, the first-stage compression cavity is a first spherical cavity used for carrying out first-time pulse compression on radio frequency signals, and the first-stage compression cavity is fixedly connected with the first-stage compression cavity input waveguide port; the first-stage compression cavity 3dB orthogonal polarization coupler is used for converting a TE10 mode in the rectangular waveguide into two orthogonal polarization TE11 modes in the circular waveguide, and the first-stage compression cavity 3dB orthogonal polarization coupler is fixedly connected with the first-stage compression cavity through a coupling hole; the working mode of the second-stage compression cavity is TE11n, and the second-stage compression cavity is a second spherical cavity used for conducting second-time pulse compression on signals output by the first-stage compression cavity. Conversion from a low-power long microwave pulse to a high-power narrow-pulse-width microwave pulse is realized, and the output power gain is improved.

The invention discloses a wireless charging system and method for unmanned inspection equipment of a power system. The wireless charging system comprises the unmanned inspection equipment, an ET and a reconfigurable intelligent surface, a radio frequency signal output by the ET is connected with the beam former, one part of the radio frequency signal processed by the beam former is received by a receiving antenna of the unmanned inspection equipment, and the other part of the radio frequency signal is received by the receiving antenna after being processed by the reconfigurable intelligent surface beam former. The multiple energy collection circuits are nonlinear and are connected in parallel, radio frequency power output by the receiving antenna is connected with input of all the energy collection circuits connected in parallel through the power divider, output of all the energy collection circuits connected in parallel is connected with the storage battery, and the energy collection circuits rectify the radio frequency power into direct current power to charge the storage battery. The unmanned inspection equipment can supplement energy in a fixed time slot and continuously receive wireless charging signals, so that long-time hovering and operation are realized, and the microwave WPT transmission efficiency can be greatly improved.

The invention relates to the technical field of photovoltaics, in particular to a light conversion adhesive film, a preparation method thereof and a photovoltaic module. The light conversion adhesive film comprises a first light conversion layer, a second light conversion layer, a diffuse reflection layer and a light guide layer; the first light conversion layer is prepared from 100 parts of first matrix resin, 0.3 to 0.9 part of an initiator, 0.1 to 5 parts of a silane coupling agent, 0.6 to 1 part of an acrylate monomer, 0.1 to 0.15 part of an antioxidant, 0.05 to 0.09 part of a light stabilizer and 0.3 to 0.8 part of first light conversion powder; the second light conversion layer is prepared from 100 parts of second matrix resin, 0.3 to 0.7 part of an initiator, 0.1 to 5 parts of a silane coupling agent, 0.6 to 1 part of an acrylate monomer, 0.1 to 0.15 part of an antioxidant, 0.05 to 0.09 part of a light stabilizer and 0.3 to 0.8 part of second light conversion powder. According to the invention, the utilization rate of light of each frequency band can be obviously improved, and the power gain of the whole assembly is improved.

The application discloses a beamforming method of a holographic MIMO antenna array based on a steering vector, and under the condition that a user end position is unknown, multiple code words are constructed based on the steering vector through the combination of the pitch angle and the azimuth angle of the user end relative to the antenna array, a code word with the maximum gain of a receiving end is selected from the code words according to the feedback of the user end, and the code word is used as the optimal transmitting or receiving coefficient of the antenna array. The user end only needs to feed back the corresponding information in sequence, the requirement for the feedback time delay is slightly low, the error code of the feedback information has a certain fault tolerance, the time complexity is relatively low compared with the exhaustive search method, the performance is good, the outdoor channel changing rapidly can be well responded, the robustness to the channel fluctuation is higher, and the overall power gain is improved. Moreover, under the condition that the user end position is known, the transmitting or receiving coefficient of the antenna array can be directly determined.

This invention belongs to the field of wireless communication technology and relates to amplifiers in wireless communication systems. Specifically, it provides a gain boost amplifier with Z-type and PreY-type LLRENs, including: a transistor M1, a Z-type LLREN, and an input PreY-type LLREN and / or an output PreY-type LLREN. The input PreY-type LLREN is connected between the input terminal of transistor M1 and the common ground terminal, the output PreY-type LLREN is connected between the output terminal of transistor M1 and the common ground terminal, and the Z-type LLREN is connected between the common ground terminal of transistor M1 and ground. This invention, through its gain boost structure design based on Z-type and PreY-type LLRENs, avoids many problems associated with Y-type LLRENs. That is, this invention effectively maximizes the usable gain G without using the Y-type LLREN. ma Increase to the corresponding upper limit value G ma_upper_limit This means effectively increasing the power gain of the amplifier.

The present invention discloses a digitally controlled dual-frequency low-noise amplifier circuit with differential output, which includes an input impedance matching network, an amplifier stage, a differential output stage and a load stage. Compared with the traditional dual-frequency low-noise amplifier with independent channels, the present invention shares a common-gate amplifier with source negative feedback, which improves the power gain of the circuit, and also significantly improves the chip area, cost and circuit utilization. Compared with the traditional dual-frequency low-noise amplifier with independent channels, the present invention uses a switch to control the shutdown of the bias voltage, which reduces the design difficulty and increases the design flexibility, so that the circuit can obtain good noise performance and impedance matching effects in various frequency bands. The present invention effectively reduces the power consumption of the system by controlling the selection of the frequency band path through the switch.

This invention discloses a distributed beamforming method, system, and apparatus for low-Earth orbit satellites, comprising: acquiring ground user location information and satellites to be communicated with; calculating the transmission paths between multiple satellites and ground users and obtaining the superimposed signal of electromagnetic waves at the ground end; calculating the superimposed power distribution of the ground electromagnetic waves based on the superimposed signal; constructing an objective function that maximizes the average received power of all ground users and the fairness of ground users based on the calculated superimposed power distribution of the ground electromagnetic waves; calculating the optimal satellite and its corresponding initial transmission phase within the selectable set, indirectly controlling the transmission distance from the satellite to the ground end to control the final phase of the electromagnetic waves received by the receiver, thereby maximizing the overall power gain of multiple ground receiving terminals and the fairness among each individual ground user, providing ideal power gain regardless of the location of the ground user, and simultaneously covering multiple users.

The present invention proposes a common-source common-base amplifier based on SiGe-BiCMOS process, including an input matching unit, a first-stage differential common-source common-base unit, a second-stage differential common-source common-base unit, a third-stage differential common-source common-base unit, a fourth-stage differential common-source common-base unit, and an output impedance matching unit; compared with a low-noise amplifier with a four-stage single-ended structure, it has better anti-noise capability and can obtain higher gain at a lower frequency; compared with a low-noise amplifier with a five-stage differential structure, it has stronger stability. The present invention adopts MOS transistors at the input stage, which obtains a lower noise coefficient at a higher frequency compared with HBT transistors; the input stage adopts a composite transistor structure to improve the power gain of the circuit; the common-source common-base structure adopted by the present invention reduces the Miller effect of the device and effectively expands the working frequency band.