12 results about "Mismatch loss" patented technology

The invention discloses an optimization method of a low-loss bending waveguide, which comprises the following steps: firstly, adopting NA bending as a basic bending path, determining two optimal boundary NA curves for a given equivalent bending radius Reff, and forming a width gradually-changed NA bending waveguide structure; lateral shift amounts din and dout are introduced into the input end and the output end of the constructed NA bending waveguide structure with the gradually-changed width respectively, and optimal lateral shift amounts din and dout are obtained through step-by-step parameter scanning and simulation optimization; and based on the optimal lateral shift amounts din and dout, obtaining a curved waveguide structure combining an NA curved path, width gradient and a specific lateral shift parameter. According to the method, the mode mismatch loss and the radiation loss can be remarkably reduced at the same time for the NA bending waveguide with the ultra-small radius, and the total transmission loss of the bending waveguide is further reduced on the basis of the prior art.

This invention discloses a signal transmission path optimization method for an integrated RF terminal chip, relating to the field of RF technology. The invention includes: S100 real-time parameter acquisition, calculation of mismatch loss factor, impedance deviation factor, and interference rise factor; S200 weighted fusion of the three factors to obtain a disabling coefficient, constructing a disabling coefficient curve, performing curve feature analysis to generate a reconstruction index, and comparing it with a threshold to determine whether reconstruction is necessary; S300 when reconstruction is required, querying the target control word of the matching network and filter based on a multi-dimensional lookup table, and performing priority correction based on interference and power occupancy; S400 executing control word writing, verifying the effect, and if it does not meet the standard, performing local search and fine-tuning until performance is restored. This invention achieves adaptive optimization of signal transmission paths in multiple frequency bands and scenarios through a closed-loop dynamic reconstruction process of perception, decision-making, execution, and verification, effectively reducing mismatch loss and interference impact, and improving the overall performance of the RF terminal chip.

A method is executed at one or more processors adapted to control and monitor transmit output power of RF signals transmitted through an RF transmitter front-end based on one or more stored mappings of calibrated values. The one or more stored mappings include a reference gain index and a reference output power value associated with the reference gain index. The method includes executing a post-calibration process with respect to an antenna having a mismatched impedance. The post-calibration process includes determining a new reference gain index associated with the mismatched impedance based on a reference gain index difference that satisfies a reference output power mismatch loss at the reference gain index; measuring new transmit signal strength indicator (TSSI) values at new gain indexes adjusted based on the new reference gain index; and updating the one or more stored mappings to include the new reference gain index and the new TSSI values.

The invention discloses a power generation layout optimization method and device for a photovoltaic power generation system, equipment and a storage medium, and is applied to the technical field of photovoltaic power generation layout optimization. The method comprises the steps of obtaining photovoltaic data of a plurality of photovoltaic modules in a target photovoltaic power generation system; processing the photovoltaic data of the photovoltaic module to obtain a voltage and current response curve; processing the voltage and current response curve to obtain a degradation characteristic quantity; based on the degradation characteristic quantity and the temperature data, obtaining health degradation data of the photovoltaic module; processing the voltage data and the current data, and constructing a photovoltaic module traction matrix; inputting the health decline data and the photovoltaic module traction matrix into a photovoltaic module recombination model for processing to obtain a photovoltaic module recombination scheme; and optimizing the power generation layout of the target photovoltaic power generation system based on the photovoltaic module recombination scheme. According to the method provided by the invention, the problem of system mismatch loss caused by site adaptive layout can be solved, and the optimal electrical performance of the system is ensured.

The application relates to a photovoltaic module and a method for determining the number of cell pieces of the photovoltaic module, and belongs to the technical field of photovoltaic technology.The photovoltaic module comprises a panel, a first adhesive film layer, a cell unit, a second adhesive film layer and a back plate which are sequentially stacked; the cell unit comprises two symmetrical and independently arranged cell piece arrays, and each cell piece array is independently provided with an outgoing end; each cell piece array comprises a cell string arranged along a first direction, and each cell string is formed by connecting b cell pieces along a second direction, the first direction and the second direction are perpendicular, and N=a*b is satisfied; wherein N is the total number of cell pieces of each cell piece array, a>=2, b>=a / 2, and a and b are both even numbers. The application can solve the problem of serious internal electrical mismatch loss of the existing photovoltaic module in the function of adapting to a micro inverter, and can significantly reduce the mismatch loss of voltage and current, improve the operation efficiency of the photovoltaic module and the economic competitiveness.

The invention provides a performance evaluation method and device for non-line-of-sight free space quantum key distribution, and belongs to the technical field of quantum communication and free space optical communication, and the method comprises the steps: constructing a three-dimensional light beam propagation model which comprises light beam drift, light beam broadening and light spot distortion caused by light beam diffraction and atmospheric turbulence; the method comprises the following steps: generating random turbulent flow phase distribution based on a sparse spectrum phase screen method, carrying out numerical simulation on a laser transmission process in combination with a step-by-step propagation algorithm, obtaining a transmissivity sample sequence in which geometric mismatch loss and a turbulent flow fading coupling effect are jointly considered under linear phase shift and secondary phase shift design, and further constructing end-to-end transmissivity probability distribution; and performing weighted evaluation on the key rate of the discrete variable and continuous variable quantum key distribution protocol by using the transmissivity probability distribution to avoid channel fluctuation distortion. The method is suitable for parameters of different turbulence intensities, wavelengths, receiving apertures and channel lengths, and can provide a basis for design and optimization of a non-line-of-sight quantum communication link.

This invention belongs to the field of wireless communication technology, specifically relating to a joint optimization method for a rotating antenna system with polarization reconfiguration capability. This invention introduces two additional degrees of freedom—three-dimensional mechanical rotation and polarization reconfigurability—at the base station end, and endows the antenna with polarization reconfigurability at the user end, constructing a "space-polarization" joint optimization mechanism to achieve precise matching between beam pointing and transmit / receive polarization states. Under this mechanism, the system can effectively eliminate polarization mismatch losses caused by antenna rotation and channel scattering in complex multipath and multi-user interference environments, thereby significantly reducing base station transmit power and comprehensively improving the system's energy efficiency while ensuring communication quality for all users.

This invention relates to the field of new energy power generation and photovoltaic engineering design technology, specifically to a method for optimizing the capacity ratio of string inverters in mountain photovoltaic power generation projects. The method includes the following steps: S1, acquiring digital elevation model data of the target mountain photovoltaic field, and establishing a three-dimensional irradiance fingerprint map of the entire field's discrete photovoltaic module installation units based on the mountain slope, aspect, and shading relationship with neighboring mountains; S2, based on the three-dimensional irradiance fingerprint map, extracting the irradiance feature vector of each installation unit, using a clustering algorithm to divide installation units with highly similar irradiance characteristics into several homogeneous string sets, and mapping the homogeneous string sets to the multi-path maximum power point tracking input of the inverter. This invention overcomes the limitations of the traditional "one-size-fits-all" approach in mountain photovoltaic design, effectively avoiding module mismatch losses caused by complex terrain by constructing a three-dimensional irradiance fingerprint map based on a digital elevation model and homogeneous clustering.

A positive-logic FET switch stack that does not require a negative bias voltage, exhibits high isolation and low insertion / mismatch loss, and may withstand high RF voltages. Embodiments include a FET stack comprising series-coupled positive-logic FETs (i.e., FETs not requiring a negative voltage supply to turn OFF), series-coupled on at least one end by an “end-cap” FET of a type that turns OFF when its VGS is zero volts. The one or more end-cap FETs provide a selectable capacitive DC blocking function or a resistive signal path. Embodiments include a stack of FETs of only the zero VGS type, or a mix of positive-logic and zero VGS type FETs with end-cap FETs of the zero VGS type. Some embodiments withstand high RF voltages by including combinations of series or parallel coupled resistor ladders for the FET gate resistors, drain-source resistors, body charge control resistors, and one or more AC coupling modules.

The invention belongs to the field of photovoltaic power station detection, particularly relates to an inspection method and system of a centralized photovoltaic power station, electronic equipment and a storage medium, and aims to solve the problems of low inspection efficiency and accuracy of the photovoltaic power station by the existing method. The method comprises the following steps: acquiring detection data of a photovoltaic power station; calculating various detection results based on the detection data; each detection result comprises the current loss of string dust retention, the attenuation rate of output power, the mismatch loss percentage and the distance between the two rows of photovoltaic arrays; obtaining the score of each detection result based on the deviation between each detection result and each standard value; performing weighted summation on the score of each index to obtain a comprehensive score of the photovoltaic power station; the comprehensive score of the photovoltaic power station is a test result. Accurate, comprehensive and objective evaluation of the photovoltaic power station is realized, and powerful technical support is provided for long-term stable operation of the photovoltaic power station.

Some embodiments described herein provide semiconductor devices including optical devices having backside transmissive regions and methods of manufacture. The semiconductor devices include a first semiconductor device stacked over a second semiconductor device, where the first semiconductor device includes a photodiode, and the second semiconductor device includes a backside transmissive region. The backside transmissive region is located below the photodiode in the first semiconductor device and includes a trench structure having a highly reflective structure, and / or the trench structure has a property of maintaining the intensity of light transmitted by the light wave through the backside transmissive region. The vacancy within the trench structure reduces the likelihood of interference, which may result in other transmission losses (e.g., reflection losses, absorption losses, scattering losses, and / or modal mismatch losses) associated with a transmissive region adjacent to the photodiode structure.

The application discloses a design method and system of a wireless energy transmission high-power focusing transmitting antenna, and belongs to the technical field of wireless energy transmission and intelligent antenna design. The method obtains a target energy transmission area, a working frequency, an energy transmission distance, a transmitting power boundary, a safety radiation limit and a manufacturing constraint, and represents a to-be-designed transmitting antenna as an antenna graph topology containing an array element, a feed, a matching and a heat dissipation relationship; a graph conditional diffusion model and a joint prediction model are trained based on multi-fidelity electromagnetic simulation data, thermal simulation data and prototype test data, a candidate antenna graph topology is generated, and constraint correction is performed according to focusing performance, sidelobe leakage, temperature rise distribution, mismatch loss and safety risk; then, electromagnetic, thermal and matching checking are performed, the model is updated in feedback, and a transmitting antenna design result meeting focusing energy transmission performance, thermal stability, safety and manufacturing constraints is output.