The invention relates to the field of electronic information and communication, in particular to a transmission cable.
Due to thinness of consumer electronic devices, such as a mobile phone, a tablet computer and a notebook computer, a traditional method of transmitting a high-frequency signal by using a coaxial cable has become insufficient. A novel signal transmission cable of replacing the coaxial transmission cable to achieve signal transmission has become one of possible new application trends in the future.
In order to achieve impedance matching of the transmission cable, an antenna and other circuit modules, the signal transmission cable is usually manufactured in a multi-layer material laminating manner and has a certain thickness, and moreover, involved connection layers are generally manufactured by metals and other conductive materials and are relatively high in hardness, so that the bending performance of the transmission cable is relatively poor.
Therefore, it is necessary to provide a transmission cable to solve the problem of poor bending performance of the existing transmission cable.
One of the main objects of the invention is to provide a transmission cable with improved bending performance.
In order to achieve the object mentioned, the invention provides a transmission cable, comprising: a superimposed line layer; a main baseline layer attached with the superimposed line layer, comprising a superimposed part on which the superimposed line layer is stacked, and a non-superimposed part on which no superimposed line layer is stacked; an unbendable part of the transmission cable formed by the superimposed line layer and the superimposed part; and a bendable part of the transmission cable formed by the non-superimposed part. The main baseline layer comprises a first grounding layer, a first base layer stacked at one side of the first grounding layer, a signal line layer stacked at one side of the first base layer far away from the first grounding layer, and a second base layer stacked at one side of the signal line layer far away from the first base layer. The superimposed line layer comprises a third base layer stacked at one side of the second base layer far away from the signal line layer, and a second grounding layer stacked at one side of the third base layer far away from the second base layer.
In addition, the signal line layer comprises an overlapping part on which the second base layer is stacked, and an extension part on which no second base layer is stacked.
In addition, the signal line layer comprises a plurality of grounding plates spaced from each other and a plurality of corresponding signal cables between every two adjacent grounding plates.
In addition, a sum of the thickness of the second base layer and the thickness of the third base layer is equal to a thickness of the first base layer.
In addition, the main baseline layer further comprises a first protective layer arranged at one side of the first grounding layer far away from the first base layer; and the superimposed line layer further comprises a second protective layer stacked at one side of the second grounding layer far away from the third base layer.
In addition, a length of the second protective layer is equal to that of the second grounding layer, and is smaller than that of the third base layer; and a length of the first protective layer is smaller than that of the first grounding layer.
In addition, the transmission cable further comprises a plurality of spaced first grounding through holes arranged in the non-superimposed part, wherein the first grounding through holes pass through the first base layer and two ends thereof are electrically connected with the grounding plates of the signal line layer and the first grounding layer respectively.
In addition, the transmission cable further comprises a plurality of spaced second grounding through holes arranged in the superimposed part, wherein the second grounding through holes sequentially pass through the first base layer, the signal line layer, the second base layer and the third base layer, and are electrically connected with the first grounding layer, the second grounding layer and the grounding plates of the signal line layer.
Many aspects of the exemplary embodiment can be better understood with reference to the following drawings. The components in the drawing are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.
The present disclosure will hereinafter be described in detail with reference to an exemplary embodiment. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiment. It should be understood the specific embodiment described hereby is only to explain the disclosure, not intended to limit the disclosure.
It is to be noted that all directional indicators in the embodiments of the invention (for example, upper, lower, left, right, front, back, inner, outer, top, bottom and the like) are only used for explaining relative position relationships among parts in some special gesture (for example, shown in the drawings) and so on. If the special gesture changes, the directional indicators also change correspondingly.
It should also be noted that when an element is referred to as being “fixed” or “disposed” on another element, the element may be directly on the other element or there may be intervening elements at the same time. When an element is called “connected” to another element, it may be directly connected to the other element or there may be intervening elements at the same time.
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It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiment have been set forth in the foregoing description, together with details of the structures and functions of the embodiment, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed.
Number | Date | Country | |
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Parent | PCT/CN2019/093954 | Jun 2019 | US |
Child | 16990948 | US |