CN214753000U - FFC screen wire for high-frequency signal transmission - Google Patents
FFC screen wire for high-frequency signal transmission Download PDFInfo
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- CN214753000U CN214753000U CN202120881773.0U CN202120881773U CN214753000U CN 214753000 U CN214753000 U CN 214753000U CN 202120881773 U CN202120881773 U CN 202120881773U CN 214753000 U CN214753000 U CN 214753000U
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Abstract
The utility model relates to a FFC screen line field especially relates to a FFC screen line for high frequency signal transmission, it includes the conductor, first high frequency membrane, the second high frequency membrane, first shielding layer and second shielding layer, a plurality of conductor intervals are parallel arrangement uniformly, the width of conductor is 0.3 ~ 0.26mm, the thickness of conductor is 0.035 ~ 0.125mm, first high frequency membrane and second high frequency membrane bond the upper and lower plane of conductor respectively, first shielding layer and second shielding layer bond first high frequency membrane and second high frequency membrane respectively and keep away from one side of conductor, first shielding layer and second shielding layer electricity are connected. By adjusting the size of the conductors, the interference between the conductors is reduced, and the signal loss is reduced; the sectional area of the whole conductor is increased relative to the prior conductor, so that the conduction rate of the conductor is improved, and the attenuation of signal transmission is reduced; the first high-frequency film and the second high-frequency film are arranged to reduce loss factors between conductors and improve transmission efficiency; the arrangement of the first shielding layer and the second shielding layer enables the overall characteristic impedance to meet the requirement of transmitting high-frequency signals.
Description
Technical Field
The utility model relates to a FFC screen line field especially relates to a FFC screen line for high frequency signal transmission.
Background
The FFC flat cable is also called a flexible flat cable, the number and the spacing of the conducting wires can be selected at will, so that the connection is more convenient, the volume of an electronic product is greatly reduced, the production cost is reduced, the production efficiency is improved, and the FFC flat cable is most suitable for being used as a data transmission cable between a moving part and a main board, between a PCB and in miniaturized electrical equipment. In the prior art, most of FFC flat cables are fixed, all parameters including signal intensity of the FFC flat cables are basically unchanged, and meanwhile, the FFC flat cables are easily interfered by external factors to transmission signals of the FFC flat cables and are difficult to be applied to transmission of high-frequency signals, such as signal transmission on a 4KTV display. The cost of the wire rod applied to high-frequency signal transmission, such as the micro coaxial cable, is high, and a wire rod capable of transmitting high-frequency signals with low cost is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the FFC screen wire for transmitting the high-frequency signals is low in cost and convenient to produce.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a FFC screen line for high frequency signal transmission, includes conductor, first high frequency membrane, second high frequency membrane, first shielding layer and second shielding layer, and is a plurality of conductor interval is parallel arrangement uniformly, the width of conductor is 0.3 ~ 0.26mm, the thickness of conductor is 0.035 ~ 0.125mm, first high frequency membrane and second high frequency membrane bond the upper and lower plane of conductor respectively, first shielding layer and second shielding layer bond first high frequency membrane and second high frequency membrane respectively and keep away from one side of conductor, first shielding layer and second shielding layer electricity are connected.
Further, the dielectric constant of the first high-frequency film and the dielectric constant of the second high-frequency film are 2.4-2.6.
Furthermore, first shielding layer and second shielding layer are mark and draw the aluminium foil.
Further, the first shielding layer and the second shielding layer are CPP base materials.
The shielding structure further comprises a reinforcing plate, wherein the reinforcing plate is embedded in the first shielding layer and the second shielding layer; the front end of the conductor extends, and the upper surface and the lower surface of the front end of the conductor can be connected.
Further, the reinforcing plate extends with a shielding plate towards the interval of a plurality of conductors.
Furthermore, the cross section of each conductor is trapezoidal, and the shapes of the adjacent conductors are mutually symmetrical by the horizontal plane of the lower ends of the conductors; the shield plate extends obliquely along intervals of the plurality of conductors.
The beneficial effects of the utility model reside in that: by adjusting the width and the thickness of the conductors, the mutual interference between adjacent conductors is reduced, and the signal loss is reduced; the sectional area of the whole conductor is increased relative to the prior conductor, so that the conduction rate of the conductor is improved, and the attenuation of signal transmission is reduced; the loss factor between conductors is reduced by arranging the first high-frequency film and the second high-frequency film, and the transmission efficiency is improved; through the arrangement of the first shielding layer and the second shielding layer, the overall characteristic impedance meets the requirement of transmitting high-frequency signals.
Drawings
Fig. 1 is a top view of an FFC screen wire for high frequency signal transmission according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of an FFC screen wire for high frequency signal transmission according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of an FFC screen line for high frequency signal transmission according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a PCB of an FFC screen wire for high frequency signal transmission according to an embodiment of the present invention.
Description of reference numerals:
1. a conductor; 2. a first high-frequency film; 3. a second high-frequency film; 4. a first shielding layer; 5. a second shielding layer; 6. a PCB; 7. a first wiring board; 8. a second wiring board; 9. a first shield plate; 10. a second shielding plate; 11. a reinforcing plate; 12. a shield plate.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 4, an FFC screen wire for high-frequency signal transmission includes a conductor 1, a first high-frequency film 2, a second high-frequency film 3, a first shielding layer 4 and a second shielding layer 5, wherein the plurality of conductors 1 are uniformly arranged in parallel at intervals, the width of the conductor 1 is 0.3 to 0.26mm, the thickness of the conductor 1 is 0.035 to 0.125mm, the first high-frequency film 2 and the second high-frequency film 3 are respectively bonded to the upper and lower planes of the conductor 1, the first shielding layer 4 and the second shielding layer 5 are respectively bonded to the sides of the first high-frequency film 2 and the second high-frequency film 3 away from the conductor 1, and the first shielding layer 4 and the second shielding layer 5 are electrically connected.
From the above description, the beneficial effects of the present invention are: by adjusting the width and the thickness of the conductors 1, the mutual interference between the adjacent conductors 1 is reduced, and the signal loss is reduced; the sectional area of the whole conductor 1 is increased relative to the sectional area of the previous conductor 1, so that the conductivity of the conductor 1 is improved, and the attenuation of signal transmission is reduced; the loss factor between the conductors 1 is reduced by providing the first high-frequency film 2 and the second high-frequency film 3, and the transmission efficiency is improved; through the arrangement of the first shielding layer 4 and the second shielding layer 5, the overall characteristic impedance meets the requirement of transmitting high-frequency signals.
Further, the dielectric constants of the first high-frequency film 2 and the second high-frequency film 3 are 2.4 to 2.6.
Furthermore, first shielding layer 4 and second shielding layer 5 are the mark and draw the aluminium foil.
Further, the first shield layer 4 and the second shield layer 5 are CPP substrates.
Further, the shielding structure further comprises a reinforcing plate 11, wherein the reinforcing plate 11 is embedded in the first shielding layer 4 and the second shielding layer 5; the front end of the conductor 1 extends, and the upper surface and the lower surface of the front end of the conductor 1 can be connected.
From the above, the reinforcing plate 11 is embedded in the first shielding layer 4 and the second shielding layer 5, so that the conventional reinforcing plate 11 adhered below the front end of the conductor 1 is avoided, and only one side of the front end of the conductor 1 can be connected.
Further, the reinforcing plate 11 extends with a shield plate 12 toward the space between the plurality of conductors 1.
As described above, by extending the shield plate 12 between the conductors 1, signal interference between the conductors 1 is reduced; meanwhile, the position of the conductor 1 is regulated, and the conductor is not easy to deviate during forming.
Further, the cross section of each conductor 1 is trapezoidal, and the shapes of the adjacent conductors 1 are mutually symmetrical by the horizontal plane of the lower end of each conductor 1; the shield plate 12 extends obliquely along the intervals of the plurality of conductors 1.
As can be seen from the above, the trapezoidal section conductor 1 has a larger sectional area and a higher conductivity than the conventional flat conductor 1; meanwhile, in order to ensure that the interval between the conductors 1 is uniform, the shapes of the adjacent conductors 1 are mutually symmetrical by the horizontal plane at the lower end of the conductor 1, so that the interval between the conductors 1 is inclined, the extended shielding plate 12 is also inclined, and the inclined shielding plate 12 can play a certain rebound buffering role when the conductor 1 is pressed, thereby avoiding the damage of the conductor 1.
The embodiment of the utility model discloses a do:
the FFC screen wire for high-frequency signal transmission of this embodiment includes conductor 1, first high frequency membrane 2, second high frequency membrane 3, first shielding layer 4 and second shielding layer 5, and is a plurality of conductor 1 interval is parallel arrangement uniformly, the width of conductor 1 is 0.3mm, the thickness of conductor 1 is 0.035mm, first high frequency membrane 2 and second high frequency membrane 3 bond the upper and lower plane of conductor 1 respectively, first shielding layer 4 and second shielding layer 5 bond first high frequency membrane 2 and second high frequency membrane 3 respectively and keep away from one side of conductor 1, first shielding layer 4 and second shielding layer 5 electricity are connected.
The first high-frequency film 2 and the second high-frequency film 3 have a dielectric constant of 2.4.
The embodiment of the utility model discloses an embodiment two is:
the FFC screen wire for high-frequency signal transmission of the embodiment comprises a conductor 1, a first high-frequency film 2, a second high-frequency film 3, a first shielding layer 4 and a second shielding layer 5, wherein the conductor 1 is uniformly arranged in parallel at intervals, the width of the conductor 1 is 0.26mm, the thickness of the conductor 1 is 0.125mm, the first high-frequency film 2 and the second high-frequency film 3 are respectively adhered to the upper plane and the lower plane of the conductor 1, the first shielding layer 4 and the second shielding layer 5 are respectively adhered to one side, away from the conductor 1, of the first high-frequency film 2 and the second high-frequency film 3, and the first shielding layer 4 and the second shielding layer 5 are electrically connected.
The first high-frequency film 2 and the second high-frequency film 3 have a dielectric constant of 2.6.
The third embodiment of the present invention is:
the FFC screen wire for high-frequency signal transmission of the embodiment comprises a conductor 1, a first high-frequency film 2, a second high-frequency film 3, a first shielding layer 4 and a second shielding layer 5, wherein the conductor 1 is uniformly arranged in parallel at intervals, the width of the conductor 1 is 0.28mm, the thickness of the conductor 1 is 0.08mm, the first high-frequency film 2 and the second high-frequency film 3 are respectively adhered to the upper plane and the lower plane of the conductor 1, the first shielding layer 4 and the second shielding layer 5 are respectively adhered to one side, away from the conductor 1, of the first high-frequency film 2 and the second high-frequency film 3, and the first shielding layer 4 and the second shielding layer 5 are electrically connected.
The first high-frequency film 2 and the second high-frequency film 3 have a dielectric constant of 2.5.
The embodiment of the utility model provides a fourth is:
the FFC screen wire for high-frequency signal transmission of the embodiment comprises a conductor 1, a first high-frequency film 2, a second high-frequency film 3, a first shielding layer 4 and a second shielding layer 5, wherein the conductor 1 is uniformly arranged in parallel at intervals, the width of the conductor 1 is 0.28mm, the thickness of the conductor 1 is 0.08mm, the first high-frequency film 2 and the second high-frequency film 3 are respectively adhered to the upper plane and the lower plane of the conductor 1, the first shielding layer 4 and the second shielding layer 5 are respectively adhered to one side, away from the conductor 1, of the first high-frequency film 2 and the second high-frequency film 3, and the first shielding layer 4 and the second shielding layer 5 are electrically connected.
The first high-frequency film 2 and the second high-frequency film 3 have a dielectric constant of 2.5.
And conductive cloth is surrounded outside the first shielding layer 4 and the second shielding layer 5.
One ends of a plurality of the conductors 1 are commonly connected with a PCB 6.
PCB6 includes first wiring board 7, second wiring board 8, first shield plate 9 and second shield plate 10, first wiring board 7 one side is glued and is had first shield plate 9, first shield plate 9 keeps away from first wiring board 7 one side and is glued and has second wiring board 8, second wiring board 8 keeps away from first shield plate 9 one side and is glued and has second shield plate 10, first wiring board 7 and second wiring board 8 electricity are connected.
The shielding structure further comprises a reinforcing plate 11, wherein the reinforcing plate 11 is embedded in the first shielding layer 4 and the second shielding layer 5; the front end of the conductor 1 extends, and the upper surface and the lower surface of the front end of the conductor 1 can be connected.
The reinforcing plate 11 has a shield plate 12 extending toward the plurality of conductors 1.
The cross section of each conductor 1 is trapezoidal, specifically, the width of the upper bottom surface of each conductor 1 is 0.28mm, the width of the lower bottom surface of each conductor 1 is 0.3mm, and the shapes of the adjacent conductors 1 are mutually symmetrical by the horizontal plane at the lower end of each conductor 1; the shield plate 12 extends obliquely along the intervals of the plurality of conductors 1.
To sum up, the FFC screen wire for high-frequency signal transmission provided by the present invention reduces the mutual interference between the adjacent conductors and reduces the signal loss by adjusting the width and thickness of the conductors; the sectional area of the whole conductor is increased relative to the prior conductor, so that the conduction rate of the conductor is improved, and the attenuation of signal transmission is reduced; the loss factor between conductors is reduced by arranging the first high-frequency film and the second high-frequency film, and the transmission efficiency is improved; the first shielding layer and the second shielding layer are arranged, so that the overall characteristic impedance meets the requirement of transmitting high-frequency signals; the PCB with the multiple layers of shielding plates is arranged, so that the signal transmission efficiency is ensured while the functions of variable PIN number, variable space, variable line sequence position and the like are realized; the double-sided connection of the front end of the conductor is realized by arranging the reinforcing plates embedded in the first shielding layer and the second shielding layer; interference between conductors is reduced by arranging the shielding plate; through the conductor with the trapezoidal section and the corresponding shielding plate, the conduction rate is improved, and meanwhile the conductor has certain restoring force when being pressed.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (5)
1. The FFC screen wire for high-frequency signal transmission is characterized by comprising conductors, a first high-frequency film, a second high-frequency film, a first shielding layer and a second shielding layer, wherein the conductors are uniformly arranged in parallel at intervals, the width of each conductor is 0.3-0.26 mm, the thickness of each conductor is 0.035-0.125 mm, the first high-frequency film and the second high-frequency film are respectively bonded with the upper plane and the lower plane of each conductor, the first shielding layer and the second shielding layer are respectively bonded with one sides, away from the conductors, of the first high-frequency film and the second high-frequency film, the first shielding layer and the second shielding layer are electrically connected, and conductive cloth is wound on the outer sides of the first shielding layer and the second shielding layer; one end of each conductor is connected with a PCB;
the dielectric constants of the first high-frequency film and the second high-frequency film are 2.4-2.6;
first shielding layer and second shielding layer are mark and draw the aluminium foil.
2. The FFC screen wire for high frequency signal transmission according to claim 1, wherein the first and second shield layers are CPP substrates.
3. The FFC screen wire for high frequency signal transmission according to claim 1, further comprising a stiffening plate embedded in the first shield layer and the second shield layer; the front end of the conductor extends, and the upper surface and the lower surface of the front end of the conductor can be connected.
4. The FFC screen wire for high frequency signal transmission according to claim 3, wherein the reinforcing plate is extended with a shield plate toward the space of the plurality of conductors.
5. The FFC screen wire for high frequency signal transmission according to claim 4, wherein the conductors have a trapezoidal cross section, and the shapes of the adjacent conductors are symmetrical to each other in a horizontal plane of the lower ends of the conductors; the shield plate extends obliquely along intervals of the plurality of conductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120881773.0U CN214753000U (en) | 2021-04-27 | 2021-04-27 | FFC screen wire for high-frequency signal transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120881773.0U CN214753000U (en) | 2021-04-27 | 2021-04-27 | FFC screen wire for high-frequency signal transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214753000U true CN214753000U (en) | 2021-11-16 |
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ID=78614042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120881773.0U Active CN214753000U (en) | 2021-04-27 | 2021-04-27 | FFC screen wire for high-frequency signal transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214753000U (en) |
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2021
- 2021-04-27 CN CN202120881773.0U patent/CN214753000U/en active Active
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