9 results about "Gain bandwidth" patented technology

This invention discloses a high-overload data analysis method and system based on multi-dimensional buffer protection, relating to the field of data acquisition and storage technology. The system consists of several functional modules, including: a transient impedance module, which acquires stress wave propagation parameters and material strain data collected in real time by the recorder node, constructs a dynamic digital twin model of the buffer structure, and outputs impact feature vectors and stress field distribution matrices; a signal reconstruction module, which dynamically configures the sensing signals based on the impact feature vectors, including the gain, bandwidth, and filtering parameters of the analog front end, conditions and performs analog-to-digital conversion on the sensing signals, and uses compressed sensing and dictionary learning algorithms to sparsely reconstruct abnormal data, generating a high-fidelity data stream and storage data integrity identifiers for each storage block; and a federated storage module, which inputs the stress field distribution matrix and storage data integrity identifiers into the edge-side reinforcement learning decision engine to calculate the failure risk probability of each storage block.

A dual-polarized or circularly polarized microstrip antenna employs a multi-layer stacked structure, comprising a feed layer, an upper dielectric substrate, a radiating layer, a prepreg layer, a lower dielectric substrate, and a ground layer connected sequentially from top to bottom. The upper dielectric substrate, radiating layer, prepreg layer, lower dielectric substrate, and ground layer are all square structures with chamfered corners. Rectangular slots are formed at the center edges of the four sides of the squares in the upper dielectric substrate, radiating layer, and prepreg layer. This invention introduces differential feeding, forming a ring structure with openings in the radiating layer and slots along ±45° directions. Radiation through these slots excites higher-order modes, resulting in higher gain. This antenna has a simple structure, is easy to manufacture, and offers significantly improved performance. It exhibits good impedance and gain bandwidth within the operating frequency band, low sidelobes, strong directivity, and high polarization purity. Furthermore, depending on the power divider applied, it can achieve either dual-polarized or circularly polarized operating modes.

The application relates to the technical field of wireless communication, and discloses a novel wide-band ceramic antenna. The novel wide-band ceramic antenna comprises first, second and third ceramic antennas of the same size stacked together from top to bottom; the first and third ceramic antennas are provided with transmitting / receiving end electrodes and feeding electrodes; the first, second and third ceramic antennas are provided with transverse electrodes and longitudinal electrodes, and the transverse electrodes and the longitudinal electrodes are provided with metal through holes. The first, second and third ceramic antennas are stacked to reduce the antenna volume and the installation difficulty; the first and third ceramic antennas are respectively provided with transmitting / receiving end electrodes and feeding electrodes, a plurality of transmitting / receiving end electrodes and feeding electrodes are arranged, the antenna bandwidth is effectively enhanced, and the radio frequency performance and the frequency band coverage range are enhanced. The metal through holes are arranged on the antenna electrodes, the distributed inductance is increased, the antenna standing wave bandwidth and the gain bandwidth are strengthened, and the increase of the antenna frequency band coverage range is realized. The application further discloses a wireless temperature and humidity sensor.

The application discloses a preparation method of a near-infrared vertical cavity surface laser with low threshold and high gain based on weakly confined quantum dots, and belongs to the technical field of quantum dot lasers. A CdS shell layer is grown on the weakly confined double-tapered CdSe quantum dots, and the thickness of the CdS shell layer is controlled to be 2 layers by controlling the injection amount of dodecanethiol; the CdSe / CdS quantum dots are spin-coated on the high-reflection surface of two Bragg reflectors (DBRs); and the surfaces coated with the quantum dots are close to each other and are spliced to form a vertical cavity surface laser. The vertical cavity surface laser constructed by taking the weakly confined double-tapered hexahedral CdSe / CdS quantum dots as deep red gain material has deep red / near-infrared laser emission of 720 nm, an extremely low laser threshold of 11.23 µJ / cm 2 and an extremely wide gain bandwidth of 670-730 nm.

The application discloses a high-overload-resistant data analysis method and system based on multi-dimensional buffer protection, and relates to the technical field of data acquisition and storage. The system is composed of a plurality of function modules, including: a transient impedance module, which acquires stress wave propagation parameters and material strain data collected by a recorder node in real time, constructs a dynamic digital twin model of a buffer structure, and outputs an impact feature vector and a stress field distribution matrix; a signal reconstruction module, which dynamically configures a sensing signal based on the impact feature vector, including gain, bandwidth and filtering parameters of an analog front end, carries out conditioning and analog-digital conversion on the sensing signal, and carries out sparse reconstruction on abnormal data by using a compression sensing and dictionary learning algorithm, to generate a high-fidelity data stream and a storage data integrity identifier of each storage block; and a federal storage module, which inputs the stress field distribution matrix and the storage data integrity identifier into a side reinforcement learning decision engine together, to calculate failure risk probabilities of the storage blocks.

The application belongs to the technical field of tunable laser, and particularly relates to a frequency-sweeping laser light source based on double SOA and double mirrors and a cooperative working method. The application comprises a first semiconductor optical amplifier, a second semiconductor optical amplifier, a first mirror, a second mirror and a coupling / diffraction element, the first semiconductor optical amplifier and the second semiconductor optical amplifier are arranged on the two sides of the coupling / diffraction element, and the first mirror and the second mirror are arranged above the coupling / diffraction element; characterized in that the first semiconductor optical amplifier, the coupling / diffraction element and the first mirror constitute an outer cavity 1, and the second semiconductor optical amplifier, the coupling / diffraction element and the second mirror constitute an outer cavity 2. Through the mode of "non-overlapping area time-sharing work and overlapping area cooperative work", combined with double SOA mutual excitation and double outer cavity frequency selection, the application breaks through the gain bandwidth limitation of single SOA, ensures the frequency-sweeping without breakpoint and power stability, and realizes the wide-range, high-power and flatness frequency-sweeping laser output.

The embodiment of the application provides a linear adjustable capacitive negative feedback amplification circuit and a bandwidth expansion method, and belongs to the technical field of integrated circuits. The circuit comprises: a differential input pair tube; a capacitive negative feedback network connected between the sources of the differential input pair tube, the network comprising a source MOS tube and a capacitor element working in a linear region, and the linear adjustment of the zero frequency is realized by adjusting the gate bias voltage of the source MOS tube; and a negative capacitance compensation network connected to the drain of the differential input pair tube, used for generating an equivalent negative capacitance to offset the load capacitance of the output node. The application also provides a bandwidth expansion method, which cooperatively improves the bandwidth through the double mechanisms of pole-zero cancellation and negative capacitance load cancellation. The application solves the problems that the bandwidth of an amplification circuit is limited and difficult to linearly adjust under a unipolar transistor process, realizes linear adjustment and multiplication of the bandwidth, and has the advantages of gain-bandwidth decoupling adjustment, strong process adaptability and the like.

This invention discloses a method for correcting design errors in a CMOS operational amplifier. First, based on predetermined performance indicators, primarily including unity-gain bandwidth, phase margin, and slew rate, an initial design of the CMOS operational amplifier is performed using a conventional design process to obtain initial circuit parameters. The initial circuit is then simulated to obtain the simulated actual unity-gain frequency, actual phase margin, and actual slew rate. Based on the performance indicators and simulation results, an error factor is calculated. The design parameters are then corrected using the error factor. Finally, based on the corrected design parameters, the dimensions of each MOSFET are recalculated to complete the design error correction. This method, combining simulation and theoretical calculation, identifies and corrects performance errors caused by process deviations, inaccurate models, or simplifications in manual design, thereby ensuring that the final circuit performance meets or exceeds the predetermined indicators.

The application provides a transformer coupling type wideband low-noise amplifier, which comprises an input matching circuit, an amplification circuit, an output wideband circuit, an input negative feedback circuit and an output protection circuit. The amplifier realizes the effects of expanding bandwidth, optimizing linearity and stability through the input negative feedback circuit, realizes input bandwidth expansion without additional noise through input matching, controls and improves the gain bandwidth of the output pole of the radio frequency signal through the inductance in the output wideband circuit, and realizes feedback optimization gain by combining the inductive coupling of the gate and the drain level of the amplifier transistor. On the basis of reducing the circuit area, the performance optimization of the low-noise amplifier is realized.