4 results about "Symmetric design" patented technology

The invention discloses a design method for a miniaturized broadband 90-degree hybrid bridge, and belongs to the technical field of hybrid bridges, and the method comprises the steps: employing a symmetric design of six layers of PCBs, enabling the first layer and the sixth layer to be respectively a symmetric bottom layer and a top layer, enabling the four sides to be provided with four ports of the hybrid bridge, enabling the second layer and the fifth layer to be respectively two symmetric optimization adjustment layers, and enabling the bottom layer and the top layer to be respectively provided with four ports of the hybrid bridge; branches are added to four ports, defect grounds are constructed on the two sides of the four ports, the third layer and the fourth layer are symmetrical signal layers, the wiring length is 1 / 4 wavelength of the center frequency, a Rogers Ro4350B plate with the dielectric constant being 3.66 is adopted between the first layer and the second layer, a Rogers 4450F prepreg with the dielectric constant being 3.52 is adopted between the second layer and the third layer, an FR4 prepreg plate with the dielectric constant being 3.96 is adopted between the third layer and the fourth layer, and the FR4 prepreg plate with the dielectric constant being 3.96 is adopted between the third layer and the fourth layer. A Rogers 4450F prepreg with the dielectric constant being 3.52 is adopted between the fourth layer and the fifth layer, and a Rogers Ro4350B plate with the dielectric constant being 3.66 is adopted between the fifth layer and the sixth layer. According to the invention, the requirements of a miniaturized and broadband strip line bridge are met.

The utility model discloses a communication optical cable joint connector, which comprises a first shell and a second shell, the first shell and the second shell have the same structure and are symmetrically designed, two ends of the first shell and the second shell are respectively and fixedly provided with a semicircular pipe, the two semicircular pipes at the same side are spliced to form a circular pipe, and the surface of the spliced circular pipe is provided with threads. And the surface of the circular pipe is rotationally connected with an internal thread cover through threads. According to the utility model, the first housing, the second housing, the internal thread cap, the extrusion assembly, the hollow sealing ring and the sealing strip are arranged, and the internal thread cap is screwed on the semicircular pipe at one side of the first housing and one side of the second housing, so that the internal thread cap pushes the extrusion assembly to extrude an optical cable penetrating into the first housing and the second housing; and secondly, the internal sealing of the first shell and the second shell can be further ensured through a hollow sealing ring and a sealing strip, and the sealing performance of the connector is improved.

This utility model relates to the field of glass installation technology and discloses a glass clamp base, including a base with an integrally formed frame. The integral frame is a U-shaped frame integrally formed on the top of the base. Two parallel, symmetrically arranged U-shaped locking positions are provided on the left and right sides of the integral frame, perpendicular to the plane of the base at 90 degrees. The base and frame have aligned U-shaped openings A and B to form a through-flow movement space. Symmetrical screw holes are provided on the top of the base. When the movable part rotates within the locking positions, depending on whether there are obstructions on the front side of the base, the sidewall of the frame limits the opening and closing to 90 degrees and 180 degrees. The interference fit between the locking positions and the movable part, as well as the reinforcement of the screw holes, ensures stable stopping at the angle. The integrally formed structure and symmetrical design of this utility model improve overall stability, can withstand long-term stress and avoid local deformation, and the dual-angle adjustment combined with precise limiting and reinforcement mechanisms makes it suitable for multiple scenarios and ensures stable angle without deviation.