High-speed low-loss mixed medium differential transmission signal line structure

Abstract

The invention discloses a high-speed low-loss mixed medium differential transmission signal line structure which is characterized by comprising a main body, conductors, first insulting layers, a second insulating layer, a shielding layer, a mylar layer and a ground line. The first insulating layers wrap the conductors so as to form core wires. The two core wires are arranged in parallel or mutually twisted and wrapped by the second insulating layer and the shielding layer in turn to form a wrapped line, and the first insulating layers of the two core wires are connected as a whole body through PE extrusion. The beneficial effects of the high-speed low-loss mixed medium differential transmission signal line structure are that the high-speed low-loss mixed medium double coaxial differential transmission signal line is stable in impedance, more excellent in transmission performance and lower in insertion loss so that the transmission distance is longer, the transmission bandwidth can be increased, the physical size of the line can be smaller and the space occupation can be reduced; the larger shielding area can be realized, coupling between the signal line conductors can be increased and coupling between the conductors and shielding can be reduced; and differential and common mode impedance can be better tuned.

Description

technical field [0001] The invention relates to a signal line, in particular to a high-speed and low-loss mixed medium differential transmission signal line structure, belonging to the technical field of communication materials. Background technique [0002] The signal line mainly refers to the line used to transmit sensing information and control information in the electrical control circuit. Signal lines are often composed of multiple cables as one or more bundles of transmission lines, or they can be printed lines arranged in printed circuit boards. With the continuous advancement of technology and applications, signal lines have developed from metal carriers to other Carriers, such as optical cables, etc. Signal lines for different purposes often have different industry standards to facilitate standardized production and application. [0003] Similar signal line products currently on the market have the following disadvantages: [0004] 1. The insulation is extruded o...

AI Technical Summary

Problems solved by technology

[0004] 1. The insulation is extruded on a single conductor as a single-ended signal. When the single-ended signal (core wire) is extruded separately, there are differences between the signal lines, and the consistency control is not precise enough. Two single-ended signals are put together through the aluminum foil. The shielding material is used as a carrier for signal transmission. When bound, it will be easily affected by external forces. The core wire is prone to deformation and the center distance of the conductor is unstable, resulting in a sudden change in impedance and affecting the transmission of signal characteristics.

[0005] 2. The specifications are fixed, the center distance is fixed, and cannot be adjusted, and the space is relatively large

[0006] 3. If you want to reduce the size, you must reduce the specification, then the transmission effect will be significantly reduced, and the insertion loss will increase significantly at the same length

[0007] 4. The coupling between the conductor and the shield is large, and the common mode loss increases

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