51results about How to "No dielectric loss" patented technology

The invention provides an ultra-wide band multi-path coaxial power distribution synthesis structure based on a high-odor oval function curve. A coaxial gradual change structure based on the high-odor oval function curve is adopted, an input signal enters a high-odor oval function curve coaxial gradual change structure from an input end coaxial connector, and is distributed onto a circular disc in a uniform-amplitude and same-phase way, multi-path coaxial probes in uniform distribution are led out from the edge of the circular disc to be coupled onto a plurality of independent amplifier assemblies corresponding to the multi-path coaxial probes for respectively carrying out power amplification, each coaxial probe adopts a step cylinder structure with the wider upper part and the narrower lower part, the amplified multi-path signal is synthesized and output through a structure completely identical to a power splitter structure. The ultra-wide band multi-path coaxial power distribution synthesis structure has the advantages that the difficult problem of high-power synthesis of the ultra-wide frequency band is solved, the high-odor oval function curve coaxial gradual change structure is adopted, in addition, the step coupling probe conversion is carried out, the signal energy high-efficiency distribution and synthesis of the ultra-wide frequency band are realized, the structure is compact and symmetrical, the heat radiation performance is good, the high-degree modular design is adopted, the processing and the assembly are simple, and the reliability is high.

The invention relates to a composite crystal change modification method of cotton yarn. According to the method, the cotton yarn is placed in a closed container, a modification medium is added into the container, pressure is raised to modification pressure, then, the pressure is released instantly, the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is used for removing the modified medium, and therefore composite crystal change and modified cotton yarn can be obtained. According to the crystal change and modified cotton yarn, pores are increased, degree of crystallinity is reduced, the yarn is soft, and therefore size stability, flexibility, dyeing performance and the like of products are improved; the method of pressure instant release is adopted, and the fluffiness and flexibility of the yarn are improved greatly; the combined effect of vacuumization, high-speed centrifugal rotation and drafting and microwave is adopted, therefore, yarn quality is further improved, and modification efficiency is greatly improved.