10results about How to "Enhanced wave performance" patented technology

The invention belongs to the technical field of ceramic materials, and discloses a wave-transparent bulletproof ceramic material and a preparation method thereof. The ceramic material comprises the following components in parts by weight: 60-80 parts of alumina micro powder, 20-40 parts of silicon nitride powder, magnesium carbonate powder, lanthanum oxide powder, a polyethylene glycol dispersant, a temporary binder emulsified paraffin and glycerol. The preparation method comprises the following steps: mixing and stirring the raw materials, and fully pulping; grinding and dispersing the slurry through a high-speed grinder; carrying out spray granulation on the slurry by adopting a centrifugal spray granulation tower, and preparing the slurry into composite granulation powder; pressing the granulation powder into a required shape to obtain a green body; and a high-temperature nitrogen gas pressure sintering furnace is adopted for product sintering. The bulletproof ceramic disclosed by the invention has the advantages of low dielectric constant, high toughness and high hardness, and normal communication signal transmission is not influenced while the bulletproof ceramic has excellent protection performance.

The invention discloses a silicon dioxide composite material with efficient thermal protection and wave-transparent performance for an antenna housing, and belongs to the technical field of high-temperature antenna housings and structural wave-transparent composite materials. The prefabricated body is prepared by a needling lamination process, and the defect that the interlayer mechanical property effect of a 2D fabric structure is not ideal is overcome. The efficient thermal protection and wave-transparent silicon dioxide composite material prepared by the preparation method disclosed by the invention is relatively excellent in comprehensive performance, relatively low in dielectric loss angle tangent value and dielectric constant and excellent in mechanical property, and is a novel multifunctional material. The method plays an important role in radio systems of aerospace crafts such as radomes, carrier rockets, airships, missiles and return satellites.

The application provides a high and low temperature resistant, acid and alkali resistant, and radiation resistant wave-transparent polyphenylene sulfide composite material, which is made of the following raw materials in parts by weight: polyphenylene sulfide resin 40-65 parts, high-density polystyrene resin 10-25 parts, low-dielectric glass fiber 15-35 parts, compatibility agent 3-8 parts, low-dielectric filler 10-25 parts, lubricant 1-3 parts, compatibilizer 3-6 parts, and antioxidant 1-2 parts. The application also discloses a preparation method of the wave-transparent polyphenylene sulfide composite material. The wave-transparent polyphenylene sulfide composite material provided by the application can meet the strict requirements of performance of wave-transparent materials in special environment fields such as aerospace, intelligent driving of automobiles, 5G / 6G communication and chemical industry.

The utility model relates to the technical field of communication antennas, in particular to a high-stability high-wave-transmission prepreg antenna system protection device, which comprises a protection mechanism, and the protection mechanism comprises a protection side plate, a raised plate and a mounting plate which are connected into a whole. The protective side plate and the mounting plate surround the peripheral part of the raised plate; mounting sleeve plates are symmetrically arranged on the inner wall surface of the mounting plate; a second sleeving edge and a first sleeving edge are arranged on the edge of the protection side plate and the edge of the installation plate correspondingly. The protective side plate, the protruding plate, the mounting plate and the mounting sleeve plate are arranged on the base; by arranging an integrated structure composed of an upper skin layer, a lower skin layer and a honeycomb core layer clamped between the upper skin layer and the lower skin layer, and a plurality of sleeving notches and sleeving edges which are matched with an antenna system, multi-directional three-dimensional limiting and fitting installation are realized, and a plurality of mounting holes formed in the edge part of the device are matched, so that the mounting efficiency is improved. The protection device can stably and effectively protect the antenna system.

The invention provides a wave-transparent unit and a radiation device, the wave-transparent unit comprises a PCB substrate, one surface of the PCB substrate is provided with an outer loop circuit and an inner loop circuit, the other surface of the PCB substrate is provided with a common edge circuit and an interdigital coupling structure, the common edge circuit and the inner loop circuit jointly form an equivalent first LC network, and the interdigital coupling structure is connected with the outer loop circuit and the inner loop circuit. The common side line, the outer loop line and the interdigital coupling structure are mutually coupled to form a virtual closed line so as to form a cascade structure of multiple coupling capacitors, and the cascade structure of the multiple coupling capacitors and the outer loop line jointly form an equivalent second LC network. The first LC network is coupled and conducted with the second LC network through the interdigital coupling structure; a reliable technical path is provided for the design of a miniaturized, common-caliber and multi-band radiation device, the wave-transparent performance of the wave-transparent unit at a high band is enhanced, and the problem of electromagnetic coupling among multiple bands is effectively solved.

The invention discloses a preparation method of PHA-PPTA copolymer fibrid and PBO-PPTA fibrid, combines the advantages and disadvantages of PBO fibrid and aramid fiber, designs a special ratio, starts from the polymer molecular structure level, adopts an in-situ copolymerization method to prepare a precursor PHA-PPTA stock solution, obtains PHA-PPTA copolymer fibrid by high-speed shearing, and then obtains PBO-PPTA copolymer fibrid by high-negative pressure thermal cyclization. It not only retains the excellent properties of PBO fibrid such as high strength, high modulus, high temperature resistance, and weak moisture absorption, but also improves the liquid phase dispersion performance and composite reinforcement effect of PBO fibrid by introducing PPTA aramid with strong polar amide groups, so that it can become a paper-based insulating material with excellent performance, so as to realize the promotion and application of PBO paper-based materials in more fields.

The application provides a wave-transparent composite material panel, a radar cover and a manufacturing method. The wave-transparent composite material panel comprises a structure layer, a wave-transparent layer and a protective layer wrapped outside the structure layer and the wave-transparent layer, wherein the structure layer comprises at least two foam layers, the wave-transparent layer comprises at least two hollow fabric composite material layers, the two adjacent foam layers and the two adjacent hollow fabric composite material layers are spaced apart by the protective layer, the reinforcing body of the hollow fabric composite material layer is woven by glass fiber yarn, and the protective layer is formed by laying glass fiber cloth first and then pouring resin. The wave-transparent composite material panel can ensure the mechanical property and the wave-transparent property simultaneously.

The invention discloses a porous wave-transparent super-hydrophobic coating as well as a preparation method and application thereof, and relates to the technical field of functional coatings. The coating is prepared from the following raw material components in parts by mass: 1 to 10 parts of wave-transparent resin, 0.1 to 5 parts of fluorinated modifier, 0.5 to 6 parts of curing agent, 6 to 60 parts of volatile organic solvent and 0.1 to 2 parts of water solvent. The super-hydrophobic coating is prepared by adopting a method of constructing a porous structure in the wave-transparent resin, so that the wave-transparent performance of the coating is synergistically improved, and meanwhile, the coating is endowed with waterproof and self-cleaning functions.

The utility model belongs to the technical field of marine masts, and particularly relates to a marine composite material integrated mast frame structure which comprises a lower-layer structure, a middle-layer structure detachably connected to the top end of the lower-layer structure, an upper-layer structure detachably connected to the top end of the middle-layer structure, and radar openings formed in the side walls of the middle-layer structure and the upper-layer structure. An upper deck is detachably connected into the connecting end of the upper-layer structure and the middle-layer structure, and a lower deck is detachably connected into the connecting end of the middle-layer structure and the lower-layer structure. According to the utility model, high wave permeability, large rigidity, light weight and designability required by the integrated mast can be realized, loads of sea wind and ship swinging are reduced, and the maneuverability of a ship is improved.

The invention provides a high-wave-transparent antenna outer cover capable of being quickly destroyed. The high-wave-transparent antenna outer cover comprises a fixed base, an antenna outer cover main body and a quick release device, the top of the fixed base is detachably connected with the antenna housing main body through a quick release device, the bottom of the fixed base is fixedly connected to a ship body and other carriers, and the fixed base is used for supporting the antenna housing main body; an accommodating cavity for accommodating a satellite antenna is formed in the antenna outer cover main body, a water inlet hole is formed in the bottom of the antenna outer cover main body, and the water inlet hole is communicated with the accommodating cavity; a self-resetting waterproof device for opening and closing the water inlet hole is arranged on the antenna outer cover main body, when the antenna outer cover main body is connected to the fixed base, the self-resetting waterproof device closes the water inlet hole, and when the antenna outer cover main body is separated from the fixed base, the self-resetting waterproof device opens the water inlet hole. The antenna outer cover and the satellite antenna are thrown into water together, so that communication equipment is quickly destroyed, and the security of confidential data in an emergency is ensured.