4results about How to "Limit transmission" patented technology

The invention provides an electromagnetic leakage suppression structure and application thereof. The electromagnetic leakage suppression structure is located between the metal plate and the printed circuit board which are stacked; a first through hole is formed in the surface of the metal plate; a second through hole is formed in the surface of the printed circuit board; the projection of the first through hole in the direction perpendicular to the metal plate coincides with the projection of the second through hole in the direction perpendicular to the metal plate. The electromagnetic leakage suppression structure comprises more than one annular bulge which is concentrically arranged and is arranged on the surface of the metal plate corresponding to the periphery of the first through hole; when electromagnetic waves pass through the gap between the metal plate and the printed circuit board, the electromagnetic leakage suppression structure limits the electromagnetic waves to spread in a channel between the first through hole and the second through hole. According to the invention, a high-impedance barrier can be formed between the metal plate and the printed circuit board, the possibility that electromagnetic waves are leaked to the external environment is reduced, and the working efficiency and reliability of the system are improved.

The invention relates to the field of lamps, and discloses a light guide part, a lamp and a carrier, the light guide part comprises at least two light guide sections which are arranged in sequence, and every two adjacent light guide sections are connected through a connecting section; wherein each light guide section is provided with a light inlet part and a light outlet part, the light inlet parts are used for allowing light of the light-emitting assembly to enter the light guide sections, the light outlet parts are used for allowing the light of the light guide sections to be emitted, and the connecting sections are configured to limit at least part of the light to be transmitted between the two adjacent light guide sections. The light guide part is designed to be of the structure that the at least two light guide sections and the connecting sections are alternately connected, independent segmented control over all the light guide sections can be achieved, for example, the on-off states of different light guide sections are independently adjusted, or differentiated color output of all the light guide sections is achieved, the problem that a traditional light guide part is single in light emitting effect is effectively solved, and the light guide part is more convenient to use. And diversified and differentiated light emitting requirements are fully met. The connecting sections can effectively limit light transmission between the adjacent light guide sections, and the light crosstalk phenomenon is avoided.

The application discloses application of a natural flavonoid compound of a plant source in preparation of a medicine for inhibiting conjugative transfer of a drug-resistant plasmid, and drug-resistant plasmid conjugative transfer tests show that a plurality of flavonoid compounds can significantly inhibit conjugative transfer of a multidrug-resistant RP4-7 plasmid and a plurality of clinical plasmids carrying different drug-resistant genes, and the inhibiting ability on mcr-1 positive plasmid is more significant. The natural flavonoid compound provided by the application can simultaneously inhibit conjugative transfer of a drug-resistant plasmid in vitro and in vivo, and provides a new idea for blocking the spread and diffusion of drug resistance.

The invention provides a metasurface waveguide structure and a millimeter wave MIMO slot waveguide array antenna. The metasurface waveguide structure comprises a first metal strip array and a second metal strip array which are located between a first metal plate and a second metal plate which are arranged in a stacked mode. A hollow groove is formed between the first metal plate and the second metal plate; the first metal strip array is arranged on two sides, corresponding to the hollow groove, of the surface of the first metal plate; the second metal strip array is arranged on two sides, corresponding to the hollow groove, of the surface of the second metal plate; the projection of the first metal strip array on any side of the hollow groove in the direction perpendicular to the first metal plate is connected with the projection of the second metal strip array on the corresponding side in the direction perpendicular to the first metal plate in an embedded mode. The first metal plate, the second metal plate, the first metal strip array and the second metal strip array limit electromagnetic waves to spread in the hollow groove. The shape complexity of the strip array structure is low, the machining difficulty is low, and the dimensional stability can be conveniently kept in the machining process.