11results about How to "Improve bandwidth performance" patented technology

The invention discloses an inter-band cascade infrared photon detector, the light incidence mode of the detector is normal incidence, the table top of the detector is a circular table top, the detector comprises a substrate, an N-type contact layer, a plurality of cascade regions and a P-type contact layer from bottom to top, and N is a positive integer; the cascade region comprises an electron barrier layer, an absorption layer and a hole barrier layer from bottom to top, the electron barrier layer is of a multi-quantum well structure, the absorption layer is a superlattice, and the hole barrier layer is of a gradient multi-quantum well structure. The device has the characteristics of good bandwidth performance and high quantum efficiency.

The present application relates to a reverse design method, device, equipment and medium for an ultra-wideband transparent absorber, the method comprising: obtaining the design requirements of the transparent absorber, the design requirements including the structural type, frequency band range and wave absorption rate of the periodic lossy surface; performing periodic lossy surface analysis and impedance extraction according to the structural type, and establishing a mapping rule between the structural parameters of the structural type and the equivalent circuit parameters; establishing an objective function according to the frequency band range and wave absorption rate, selecting the absorber material and the equivalent circuit model, and determining the parameter range of the equivalent circuit model; using circuit simulation software to iteratively optimize the equivalent circuit model, fitting the objective function, and obtaining the design parameters of the equivalent circuit model; according to the mapping rule and the design parameters, inverting the structural parameters corresponding to the design parameters; according to the structural type and the structural parameters, obtaining an ultra-wideband transparent absorber that meets the frequency band range and wave absorption rate. The present method can be used to design an ultra-wideband absorber.

This invention discloses a dual-substrate circularly polarized reconfigurable omnidirectional antenna based on PIN diode control. The antenna comprises a first substrate and a second substrate. The second substrate has a ground plane printed on it, and the first substrate has a radiating patch printed on it. The radiating patch includes a central square patch, a Γ-shaped stub, a loop antenna, PIN diodes, and via shorting posts. Seamless switching between left-hand and right-hand circular polarization is achieved through the on / off combinations of 16 PIN diodes, with a simple switching logic. High polarization purity is achieved in both polarization modes, and the via shorting posts effectively reduce mutual interference between modes, resulting in strong switching reliability. In both circular polarization modes, the relative impedance bandwidth and axial ratio bandwidth are wide. In the left-hand circular polarization mode, the relative impedance bandwidth reaches 19.38%, covering 2.33-2.83GHz with |S11|<-10dB, and the axial ratio bandwidth reaches 26.3%, covering 2.08-2.71GHz with AR<3dB. In the right-hand circular polarization mode, the relative impedance bandwidth reaches 19.8%, covering 2.32-2.83GHz with |S11|<-10dB, and the axial ratio bandwidth reaches 23.43%, covering 2.11-2.67GHz with AR<3dB, which is significantly better than existing narrowband designs of the same type.

This invention relates to the field of data transmission technology, specifically to a performance optimization system and method for single-QP scenarios based on RDMA. The system includes an electrically connected HCA network interface card (NIC) and a host. The HCA NIC internally includes an electrically connected DB_PROC module, a WQE_PROC module, and a PKT_ENG module. The WQE_PROC module contains a WQE_CACHE cache space. The DB_PROC module obtains the scheduling request for the target QP. The WQE_PROC module queries the WQE_CACHE cache space to check if the target work queue element WQE corresponding to the target QP exists. If it exists, it reads it from the WQE_CACHE cache space; otherwise, it reads it from the host. This invention reduces the latency of reading WQE from the host, thereby improving bandwidth performance in single-QP scenarios and enhancing data processing efficiency.

This application provides an analog front-end chip, an analog front-end circuit, and a signal processing device, including: a first operational amplifier module for amplitude adjustment of an electrical signal connected to a first input impedance network; and a second operational amplifier module for amplitude adjustment of an electrical signal connected to a second input impedance network. The second input impedance network has a different impedance than the first input impedance network. The first and second operational amplifier modules are integrated within the same chip. This solves the problem of parasitic capacitance and resistance sensitivity caused by external chip interconnections; avoids the influence of process deviations on the bandwidth of the signal transmission path; and easily achieves high bandwidth performance for the analog front-end circuit. Simultaneously, since all critical signal paths are within a single chip, the temperature characteristics are consistent, resulting in minimal system temperature drift.

The present invention relates to a variable impedance converter and electronic equipment, belonging to the technical field of integrated circuits. The present invention comprises an input coupling unit and an output coupling unit, wherein the input coupling unit and the output coupling unit comprise the same number of coupling coil pairs, each coupling coil pair comprises a first coupling coil and a second coupling coil; the first input end of the input coupling unit is connected to the first input end of the output coupling unit as the input end of the variable impedance converter; the first output end of the output coupling unit is used as the output end of the variable impedance converter; the second input end of the input coupling unit is connected to the second input end of the output coupling unit; the first output end of the input coupling unit is connected to the second output end of the output coupling unit; the second output end of the input coupling unit is used as the common end of the variable impedance converter; the variable impedance converter of the present invention has the advantages of low cost, small size, good bandwidth performance and low loss.

The invention relates to a large-current power supply circuit design method, and belongs to the field of circuit design. The high-current power supply circuit comprises an eight-phase controller circuit, eight intelligent Drmos circuits integrated with MOSFETs (Metal-Oxide-Semiconductor Field Effect Transistors) and a compensation function, and a far-end feedback circuit. The invention provides a design scheme for realizing a combined circuit of a single controller and 8-phase Drmos on a 6U standard mainboard, and the problem that the 6U mainboard is limited in design or poor in performance due to small space of a traditional power supply can be effectively solved. According to the invention, the limited space area of the mainboard is effectively reduced, the overvoltage and overfrequency capabilities are effectively improved, the problem of overheating of the mainboard is solved, the stability is improved, and the bandwidth capability of the converter is favorably improved.

The present invention designs a lumped power divider based on a T-type equivalent circuit and a design method thereof, wherein the lumped power divider includes an input port, two output ports and two branches; the two branches are symmetrical and identical; the input ends of the two branches are connected to the input port, and the output ends of the two branches are connected to at least two output ports in a one-to-one correspondence; one of the branches includes at least a first-order electromagnetic hybrid coupling T-type equivalent circuit, a second-order T-type equivalent circuit and a third-order T-type equivalent circuit. The above design ensures that the power divider achieves good working performance in each band of ultra-wideband frequency bands, the electromagnetic hybrid coupling T-type equivalent circuit effectively expands the bandwidth, and the use of resistors and capacitors for isolation has high isolation, low insertion loss, and good input and output impedance matching performance in the working frequency band, meeting the current market demand.

The invention belongs to the technical field of SoC chips, and relates to a safety starting system and method based on a heterogeneous multi-core SoC chip, and the system comprises a safety subsystem, a heterogeneous processor module, a shared memory module and a safety starting system bus. The security subsystem, the heterogeneous processor module and the shared memory module communicate through a security starting system bus, the heterogeneous processor module comprises heterogeneous processors, and the heterogeneous processors are started according to guidance of a security core; the shared memory module is used for storing instructions required when the heterogeneous processors are started; the security subsystem comprises a security core, a security algorithm module, an exclusive memory module, a security subsystem bus and a security subsystem DMA (Direct Memory Access); the exclusive memory module comprises an ROM (Read Only Memory) and an RAM (Random Access Memory). According to the invention, the problem of inter-chip low-speed interconnection caused by an external trusted module technology is solved, meanwhile, the security risk caused by exposure of an inter-chip bus is reduced, and the delay and bandwidth performance is enhanced.

This application provides an LDPC code error correction method, apparatus, electronic device, and storage medium. The method includes: after completing one round of iterative decoding of the current codeword of the LDPC code, determining whether the current codeword is in an oscillatory correctable state according to a preset oscillation correctability determination condition; when the current codeword is determined to be in an oscillatory correctable state, adjusting the preset parameters in the iterative decoding process by weighting and offsetting; after the adjustment is completed, continuing to perform the next round of iterative decoding on the current codeword until the current codeword is successfully decoded; obtaining the next codeword and repeating the above steps until all codewords in the oscillatory correctable state are successfully decoded. This application avoids the time overhead and resource consumption caused by restarting the post-processing flow after decoding failure, effectively reducing the error level, and has the advantages of short processing time, high bandwidth performance, and low hardware resource consumption.

The utility model discloses an annular coupling radiation structure antenna, comprising a PCB substrate, a radiation part and a feed ground part, the PCB substrate is used as a basic carrier and can provide physical support for the radiation part and the feed ground part of the antenna; the radiation part comprises a feed arm, a feed welding point is reserved at one end of the feed arm, the other end of the feed arm is connected with a high-frequency coupling radiation surface, the high-frequency coupling radiation surface is partially coupled with a gap of the feed arm, a low-frequency coupling radiation surface is arranged at the tail end of the high-frequency coupling radiation surface in an extending manner, and the low-frequency coupling radiation surface is annular; the feed ground part serves as a grounding area of the antenna and comprises a feed ground welding point located at one end of the feed ground part and a feed ground extension section extending towards the other end of the feed ground part. According to the utility model, the bandwidth of the antenna can be increased under the same size, the current situation that the space requirement and the performance are unbalanced in the existing antenna design is further relieved, and the antenna can realize effective bandwidth resonance with a smaller size requirement, so that the design requirement of the antenna is met in a limited environment.