41results about How to "Efficient radiation" patented technology

The invention discloses a broadband surface Plasmon radiator. The broadband surface Plasmon radiator operates at the microwave frequency band and uses dual-surface antipodal metallic structure, namely dielectric upper-level metal and lower-level metal use same structure and are arranged oppositely. The broadband surface Plasmon radiator performs feed through a conventional microstrip transmission line, achieves radiation of surface Plasmon by using a single-side fold belt line with a gradually-changed groove depth and an opening metallic structure, and solves a problem that a radiator in the prior art is large in overall size and cannot be miniaturized. The broadband surface Plasmon radiator may achieve direct and high-efficient radiating surface Plasmon within a broadband range.

The invention belongs to the technical field of antennas, and discloses a ridge gap waveguide based circularly polarized antenna. The circularly polarized antenna is sequentially provided with a feed network layer and a radiation layer from bottom to top, and is characterized in that the feed network layer comprises a lower metal floor, periodically arranged metal pins, a power distribution metal ridge transmission structure and four through holes; the power distribution metal ridge transmission structure provides phase output with pairwise phase difference being 180 degrees according to the arrangement of four slot antennas; the slot radiation layer comprises an upper cover metal plate, four ring-shaped slots with braches and four through holes; and the four ring-shaped slotted slots with branches are distributed in a central symmetry manner, and the four slot antenna units radiate circularly polarized waves respectively and form a 2*2 circularly polarized antenna array. The impedance bandwidth of the antenna reaches up to 24.5%, the axis ratio bandwidth reaches up to 11.4%, and the gain in the frequency band can also meet requirements of practical applications. The ridge gap bandwidth based circularly polarized antenna stays at a high level in antennas of the same kind, and meets requirements of simple structure, small size and easy processing for antennas in practical applications.

The present invention provides a resin structure that has high heat dissipation properties and excellent adhesiveness at the interface with a heat-generating device. The resin structure is disposed on the base body to dissipate the heat of the base body to the outside. The resin structure includes: a water-based coating layer, which is disposed on the base body and includes the water-based coating and an average particle diameter of 30 μm or more and 150 μm or less. a filler; and a resin layer, which is provided on the water-based paint layer and contains a thermosetting resin, the far-infrared emissivity of the filler is 0.8 or more, and the average aspect ratio of the long axis and the short axis passing through the center of gravity of the filler is 1 or more and 12 or less , for more than 80% of all fillers, the long axis of the filler passing through the center of gravity has a length that is 1.7 times or more the total thickness of the water-based paint layer of the water-based paint layer and the thickness of the thermosetting resin of the resin layer.