7results about How to "Improve coupling strength" patented technology

The invention relates to a miniaturized broadband power dividing filter applied to an X frequency band. The antenna comprises a metal layer and a dielectric substrate layer, and the metal layer is divided into two layers including an upper metal layer and a lower metal layer; the upper metal layer comprises a section of input feeder line, a first output feeder line, a second output feeder line, an isolation resistor, a first filtering branch knot and a second filtering branch knot, and each of the first filtering branch knot and the second filtering branch knot comprises two same dual composite left and right hand resonance units; the lower metal layer is of a metal grounding plate structure, and two grooves are formed in the metal grounding plate. According to the invention, the sub-wavelength characteristic is fully utilized, the miniaturization of the circuit is realized, the defect of overlarge size of a traditional cascade scheme is effectively overcome, and the circuit is suitable for a high-frequency (x-waveband) application scene. The whole structure is based on the double-sided microwave dielectric plate, has the advantages of simple processing and low cost, and is suitable for large-scale production.

The invention discloses a resonance regulation and control system based on symmetry control. The resonance regulation and control system comprises a low-symmetry metal spiral structure and an excitation microstrip circuit. The low-symmetry metal spiral structure is composed of four metal spiral arms, and the four metal spiral arms have two different lengths. The excitation microstrip circuit sequentially comprises a metal strip, a dielectric substrate layer and a metal ground plane; the resonator introduces an electromagnetic resonance mode excited by a first-order current through the asymmetric design of a low-symmetry metal spiral structure, and realizes the regulation and control of resonance characteristics.

The application discloses a 750-850nm waveband photonic crystal surface emitting laser and a preparation method, and belongs to the field of semiconductor lasers. The application is divided into surface etching and buried photonic crystal layer structures, uses n-GaAs as a substrate, combines surface etching or buried photonic crystal structures, uses amorphous silicon, titanium oxide, GaP or AlGaAs as main materials of a resonant cavity, utilizes large-area in-plane resonance and high coupling with a quantum well active layer, realizes low-loss resonance and optical gain, and realizes a 750-850nm waveband semiconductor laser with high light beam quality, high power and surface emission.

The application relates to a single-molecule transistor structure coupled with a THz wave band and a preparation method thereof. The single-molecule transistor structure comprises a silicon substrate, a gate, a gate dielectric layer, a source and a drain matched with the gate control, a split ring resonator structure, a peripheral electrode and a single-molecule active region located at a nanometer / sub-nanometer gap of the source and the drain. Through the structure and the method, a significant terahertz local field enhancement can be obtained in the gap region where the molecules are located while the transistor characteristics and the device stability are ensured, and an implementable process path is provided for the construction and application research of the single-molecule coupling device in the terahertz wave band.

This invention provides a machine learning-based method and system for predicting changes in karst carbon sinks. It acquires environmental baseline data and measured carbon sink data for karst areas, and constructs a dynamic coupling body for karst carbon sinks, including elements such as real-time correlation links. A pre-trained carbon sink evolution prediction model is initiated to perform bidirectional interactive modeling with this coupling body. The carbon sink evolution prediction model generates feature iteration instructions to drive feature updates in the coupling body, and the coupling body provides feedback on feature change signals to correct model parameters, obtaining intermediate results from multiple rounds of interactive modeling. Based on these intermediate results, operations such as correlation link strengthening are performed on the coupling body to obtain the evolved coupling body. The carbon sink evolution prediction model is then used to perform cross-dimensional feature decoding and correlation trend inference on the evolved coupling body to generate karst carbon sink change prediction results. This invention considers the relationship between environmental factors and carbon sinks, improving prediction accuracy and adaptability through dynamic interaction and optimization.

The invention provides a C4 asymmetric topological photonic crystal angular state coupling-based Fano filter, which is composed of a topological boundary state optical waveguide and one or more topological angular state resonant cavity structures, and Fano resonance is realized between the topological boundary state optical waveguide and the topological angular state resonant cavity structures through a coupling interface; the topological boundary state optical waveguide and the topological angular state resonant cavity are both constructed based on C4 asymmetric topological photonic crystals. Through a plurality of topological angular state resonant cavities and adjustment of the sizes of dielectric cylinders at the corners of the resonant cavities, the local field intensity can be enhanced, zero-dimensional optical localization is realized, and selective optical filtering of two or more specific frequencies is realized. The filter provided by the invention can realize an efficient single-frequency or multi-frequency-band optical filtering function, and provides a new scheme for the application of a topological photonic device in optical communication.

The application provides a broadband filtering device and a multi-system access platform, and relates to the technical field of multi-system access platforms, wherein the broadband filtering device comprises a dielectric substrate, a resonator arranged on the surface of the dielectric substrate, and a plurality of input units arranged around the resonator; each input unit comprises a first coupling line, a second coupling line and an input piece arranged on the surface of the dielectric substrate; the first coupling line and the second coupling line are connected with the input piece; the first coupling line and the second coupling line are coupled with the resonator; and the input piece is used for inputting an electric signal. The broadband filtering device and the multi-system access platform provided by the application solve the problem of narrow bandwidth of the filtering device in the prior art.