CN111430864B - Transmission line and terminal device - Google Patents
Transmission line and terminal device Download PDFInfo
- Publication number
- CN111430864B CN111430864B CN201911295479.5A CN201911295479A CN111430864B CN 111430864 B CN111430864 B CN 111430864B CN 201911295479 A CN201911295479 A CN 201911295479A CN 111430864 B CN111430864 B CN 111430864B
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- Prior art keywords
- transmission line
- grounding
- signal
- signal transmission
- conductive lines
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 63
- 239000004020 conductor Substances 0.000 claims abstract description 38
- 238000005452 bending Methods 0.000 claims abstract description 34
- 230000008054 signal transmission Effects 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 description 5
- 208000010392 Bone Fractures Diseases 0.000 description 4
- 206010017076 Fracture Diseases 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/08—Microstrips; Strip lines
- H01P3/081—Microstriplines
Landscapes
- Structure Of Printed Boards (AREA)
Abstract
The invention provides a transmission line, which comprises at least one layer of grounding conductor and a signal layer; a signal transmission line is arranged in the signal layer, and the width of the grounding conductor is greater than that of the signal transmission line; the transmission line comprises at least two connection areas and at least one bending area clamped between the two connection areas in the signal transmission direction; in the bending area, the grounding conductor comprises a grounding sheet corresponding to the signal transmission line and grounding grids arranged on two sides of the grounding sheet in the direction perpendicular to the signal transmission direction, and the grounding sheet and the grounding grids are connected with the grounding conductors of the connecting areas at two ends of the grounding grids. According to the transmission line and the terminal equipment provided by the invention, the mesh structure is arranged in the bending area of the grounding conductor, so that the transmission line is easy to bend during wiring, and the grounding sheet is arranged at the projection position of the signal transmission line on the grounding conductor in the bending area, so that the influence of the mesh structure on impedance is reduced, and the transmission performance of the transmission line is ensured.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of signal transmission control, and in particular, to a transmission line and a terminal device.
[ background of the invention ]
With the development of 5G (5th generation mobile networks) and consumer electronics technologies, the multi-antenna technology has been studied for a long time. The space for the layout of the traditional radio frequency coaxial transmission line is smaller and smaller, so that a novel transmission structure is produced; aiming at the design of a multi-antenna radio frequency transmission line, the design mainly adopts a PCB (printed circuit board) planar circuit or a flexible circuit and the like, and the commonly used structure mainly comprises a microstrip line, a coplanar waveguide line, a strip line, a dielectric integrated waveguide and the like; by integrating the space structure of the terminal equipment, a common transmission line module needs to be bent once or for multiple times, and a narrow bending area has a fracture risk, so that grid copper design needs to be carried out on a local area or a large-area; the mesh copper structure can disrupt the transmission line reference ground structure resulting in impedance mismatch and thus reduced performance.
[ summary of the invention ]
The invention aims to provide a transmission line without influencing transmission performance under the condition of bending.
The technical scheme of the invention is as follows: a transmission line comprising at least one ground conductor and a signal layer; a signal transmission line is arranged in the signal layer, and the width of the grounding conductor is greater than that of the signal transmission line; the transmission line comprises at least two connection areas and at least one bending area clamped between the two connection areas in the signal transmission direction; in the bending area, the grounding conductor comprises a grounding sheet corresponding to the signal transmission line and grounding grids arranged on two sides of the grounding sheet in the direction perpendicular to the signal transmission direction, and the grounding sheet and the grounding grids are connected with the grounding conductors of the connecting areas at two ends of the grounding grids.
Further, in the bending area, an orthographic projection of the signal transmission line on the grounding conductor is positioned in the grounding sheet.
Further, the grounding grid comprises a plurality of conducting wires, and the conducting wires are arranged in a crossed mode to form a grid structure.
Furthermore, the plurality of wires include a plurality of first wires and a plurality of second wires, the plurality of first wires and the plurality of second wires are arranged in a crossing manner, the first wires are arranged in parallel along a first straight line, and the second wires are arranged in parallel along a second straight line.
Further, the first straight line is perpendicular to the second straight line.
Further, the transmission line includes two layers of ground conductors respectively disposed on both sides of the signal layer.
The invention also provides a terminal device comprising any of the transmission lines described above.
The invention has the beneficial effects that: the bending area of the grounding conductor is provided with the mesh structure, so that the transmission line is easy to bend and not easy to break when in wiring, and the projection position of the grounding conductor relative to the signal transmission line in the bending area is provided with the non-mesh structure, thereby reducing the influence of the mesh structure on the impedance and ensuring the transmission performance of the transmission line.
[ description of the drawings ]
FIG. 1 is a broken-away schematic view of a transmission line of an embodiment of the present invention;
FIG. 2 is an enlarged view of a bending region of a transmission line according to an embodiment of the present invention;
FIG. 3 is a reflection coefficient plot for an embodiment of the invention:
fig. 4 is a graph of transmission coefficients for an embodiment of the invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
The embodiment of the invention provides a transmission line and terminal equipment, wherein when an antenna is arranged in the terminal equipment, the antenna and a signal processing unit of the terminal equipment need to be electrically connected through the transmission line. In contrast, with the transmission line, an effective transmission layout can be performed in a limited space of a terminal device. Terminal devices include, but are not limited to, smart phones, tablets, and portable wearable devices.
Referring to fig. 1-2, the transmission line includes at least one ground conductor 10 and a signal layer 20; a signal transmission line 21 is arranged in the signal layer 20, and the width of the grounding conductor 10 is larger than that of the signal transmission line 21; the transmission line comprises at least two connection areas 11 and at least one bending area 12 clamped between the two connection areas 11 in the signal transmission direction; in the bending region 12, the grounding conductor 10 includes a grounding strip 122 corresponding to the signal transmission line 21 and grounding grids 121 disposed on two sides of the grounding strip in a direction perpendicular to the signal transmission direction, and both the grounding strip 122 and the grounding grids 121 are connected to the grounding conductors 10 of the connection regions 11 at two ends thereof.
In the present embodiment, the transmission line includes two layers of ground conductors 10 and a signal layer 20 sandwiched between the two layers of ground conductors 10, the ground conductors 10 are connected to ground, and the signal layer 20 is used for transmitting radio frequency signals. Specifically, the transmission line includes two connection areas 11 and at least one bending area 12, and the bending area 12 is connected to the two connection areas 11 to connect and combine the connection areas 11 into a whole. In some embodiments, the transmission line may include a plurality of connection regions 11, and any two connection regions 11 are electrically connected through a bending region 12 to form a complete transmission line. Specifically, the signal layer 20 further includes a substrate 22, the signal transmission line 21 is embedded in the substrate 22, and the ground conductor 10 is attached to a surface of the substrate 22. Specifically, the signal propagates along the transmission line in the a3 direction. The ground conductor 10 includes a ground strip 122 and a ground grid 121 in the bending region 12, both ends of the ground strip 122 along the A3 direction are electrically connected with the ground conductor 10 of the connection region 11, both ends of the ground strip 122 perpendicular to the A3 direction are electrically connected with a ground grid 121, and both ends of the ground grid 121 along the A3 direction are electrically connected with the ground conductor 10 of the connection region. Specifically, the signal layer 20 is electrically connected to an antenna of the terminal device and a signal processing unit of the antenna, and the ground conductor 10 serves as a reference ground.
Preferably, in the bending region 12, an orthographic projection of the signal transmission line 21 on the ground conductor 10 is located in the ground strip 122.
Specifically, in the bending region 12, the orthographic projection of the ground patch 122 on the signal layer 20 covers the signal transmission line 21. It will be appreciated that two layers of ground conductors 10 sandwich the signal layer 20, with the signal layer 20 of the inflection regions 12 corresponding to the ground patches 122 of the ground conductors 10. The grounding strip 122 clamps and covers the signal transmission line 21 in the bending region 12, so that the structural continuity of the grounding conductor 10 can be enhanced and the impedance influence on the signal layer 20 can be reduced on the premise of not affecting the flexible characteristic of the grounding grid 121.
Preferably, the grounding network 122 includes a plurality of wires, and the plurality of wires are arranged in a crossing manner to form a grid structure.
Specifically, bending zone 12 is bending zone 12 of transmission line in terminal equipment, and for reducing the fracture that buckles and cause the transmission line, grounding grid 121 that bending zone 12 set up is crossed by a plurality of wires and is set up, forms a plurality of grid structures, reduces the transmission line and buckles the power of dragging to bending zone 12, reduces cracked risk. The grid of the ground grid 121 may be a grid with flexibility, such as a prism, a rectangle, a triangle, or a hexagon, which is not limited in the present invention.
Preferably, the plurality of conductive lines includes a plurality of first conductive lines 1211 and a plurality of second conductive lines 1212, the plurality of first conductive lines 1211 and the plurality of second conductive lines 1212 are arranged to intersect to form a grid structure, the first conductive lines 1211 are arranged in parallel along a first straight line L1, and the second conductive lines 1212 are arranged in parallel along a second straight line L2.
In this embodiment, the first conductive lines 1211 extending along the first straight line L1 intersect with the second conductive lines 1212 extending along the second straight lines L2, and an included angle between the first straight line L1 and the second straight line L2 is 90 degrees. The bending area 12 of the transmission line is arranged at the bending position of the internal space of the terminal equipment, the fracture risk of the bending area 12 is reduced through the flexibility of the grids, and the good performance of the transmission line is guaranteed. The first straight line L1 is perpendicular to the second straight line L2, so that the production is more convenient in the process of carrying out mass industrial production.
In the embodiment, the bending region 12 includes two grounding grids 121, the two grounding grids 121 are respectively located at two side edges of the grounding strip 122, and both the two grounding grids 121 are electrically connected to the grounding strip 122. Through the elasticity of ground connection net 121 to reduce because of buckling the effect of dragging to the both sides edge of district 12 of buckling, reduce the fracture risk.
As shown in fig. 3, comparing the reflection coefficient curve S2 of the terminal device before using the transmission line of the present invention with the reflection coefficient curve S1 of the terminal device after using the transmission line of the present invention, it can be seen that the transmission line of the present invention can effectively reduce the return loss during transmission, so as to improve the radio frequency performance of the terminal device.
As shown in fig. 4, the insertion loss performance after the transmission line of the present invention is used is better as compared with the transmission coefficient curve S3 before the transmission line of the present invention is used and the transmission coefficient curve S4 after the transmission line of the present invention is used.
In the above embodiment, the grounding grid 121 of the transmission line makes the flexibility of the transmission line stronger, which reduces the risk of bending and breaking of the transmission line, and in the bending region 12, the orthographic projection position of the signal layer 20 on the grounding conductor 10 is provided with the grounding strip 122, which increases the continuity of the grounding conductor 10, so that the influence of the grid-shaped arrangement of the grounding grid 121 on the impedance of the signal layer 20 is reduced, and the transmission line is not easily broken in the bending process.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (7)
1. A transmission line comprising at least one ground conductor and a signal layer; a signal transmission line is arranged in the signal layer, and the width of the grounding conductor is greater than that of the signal transmission line; the transmission line comprises at least two connection areas and at least one bending area clamped between the two connection areas in the signal transmission direction; in the bending area, the grounding conductor comprises a grounding sheet corresponding to the signal transmission line and grounding grids arranged on two sides of the grounding sheet in the direction perpendicular to the signal transmission direction, and the grounding sheet and the grounding grids are connected with the grounding conductors of the connecting areas at two ends of the grounding grids.
2. The transmission line of claim 1, wherein an orthographic projection of the signal transmission line on the ground conductor is located within the ground patch within the inflection region.
3. The transmission line of claim 2, wherein the grounding grid comprises a plurality of wires arranged in a cross-over arrangement to form a grid structure.
4. The transmission line of claim 3, wherein the plurality of conductive lines includes a plurality of first conductive lines and a plurality of second conductive lines, the plurality of first conductive lines and the plurality of second conductive lines are arranged in a cross, the first conductive lines are arranged in parallel along a first straight line, and the second conductive lines are arranged in parallel along a second straight line.
5. The transmission line according to claim 4, characterized in that the first line is perpendicular to the second line.
6. The transmission line of claim 5, comprising two layers of ground conductors, one on each side of the signal layer.
7. A terminal device, characterized in that it comprises a transmission line according to any one of the preceding claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911295479.5A CN111430864B (en) | 2019-12-16 | 2019-12-16 | Transmission line and terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911295479.5A CN111430864B (en) | 2019-12-16 | 2019-12-16 | Transmission line and terminal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111430864A CN111430864A (en) | 2020-07-17 |
| CN111430864B true CN111430864B (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911295479.5A Expired - Fee Related CN111430864B (en) | 2019-12-16 | 2019-12-16 | Transmission line and terminal device |
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| Country | Link |
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| CN (1) | CN111430864B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070997A (en) * | 2011-12-22 | 2015-11-18 | 株式会社村田制作所 | High-frequency signal line and electronic device |
| CN105393645A (en) * | 2014-06-16 | 2016-03-09 | 日本梅克特隆株式会社 | Flexible printed circuit board and manufacturing method of flexible printed circuit board |
| CN207603991U (en) * | 2017-01-04 | 2018-07-10 | 吉佳蓝科技股份有限公司 | Flexible PCB |
| CN207802499U (en) * | 2017-01-04 | 2018-08-31 | 吉佳蓝科技股份有限公司 | Flexible PCB |
| US10624209B2 (en) * | 2016-02-26 | 2020-04-14 | Gigalane Co., Ltd. | Flexible printed circuit board |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8587953B2 (en) * | 2008-01-07 | 2013-11-19 | Apple Inc. | Flexible data cable |
-
2019
- 2019-12-16 CN CN201911295479.5A patent/CN111430864B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070997A (en) * | 2011-12-22 | 2015-11-18 | 株式会社村田制作所 | High-frequency signal line and electronic device |
| CN105393645A (en) * | 2014-06-16 | 2016-03-09 | 日本梅克特隆株式会社 | Flexible printed circuit board and manufacturing method of flexible printed circuit board |
| US10624209B2 (en) * | 2016-02-26 | 2020-04-14 | Gigalane Co., Ltd. | Flexible printed circuit board |
| CN207603991U (en) * | 2017-01-04 | 2018-07-10 | 吉佳蓝科技股份有限公司 | Flexible PCB |
| CN207802499U (en) * | 2017-01-04 | 2018-08-31 | 吉佳蓝科技股份有限公司 | Flexible PCB |
Non-Patent Citations (1)
| Title |
|---|
| 一种基于共面波导传输线的挠性互联线;李玉刚，葛新灵，姜万顺;《2017年全国微波毫米波会议论文集（下册）》;20170508;全文 * |
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|---|---|
| CN111430864A (en) | 2020-07-17 |
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Granted publication date: 20210709 |