CN113540730A - Flexible light and thin multi-channel transmission line - Google Patents
Flexible light and thin multi-channel transmission line Download PDFInfo
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- CN113540730A CN113540730A CN202010304937.3A CN202010304937A CN113540730A CN 113540730 A CN113540730 A CN 113540730A CN 202010304937 A CN202010304937 A CN 202010304937A CN 113540730 A CN113540730 A CN 113540730A
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- 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
- H01P3/082—Multilayer dielectric
Abstract
The invention provides a flexible light and thin multichannel transmission line which comprises a multilayer transmission line port, a middle transmission line and a multilayer transmission line port, wherein the multilayer transmission line port, the middle transmission line and the multilayer transmission line port are sequentially connected; the middle conducting layer comprises a first metal layer, a first dielectric layer, a middle wiring layer, a second dielectric layer, a second metal layer and a first metalized through hole penetrating through all the layers, wherein the first metal layer, the first dielectric layer, the middle wiring layer, the second dielectric layer and the second metal layer are sequentially arranged; the multi-layer transmission line port comprises a third medium layer connected with the first medium layer, a port wiring layer connected with the middle wiring layer, a fourth medium layer connected with the second medium layer, a metalized grounding hole penetrating through each layer, a first metalized connecting hole penetrating through the third medium layer and connected with the port wiring layer and a bonding pad connected with the first metalized connecting hole. Compared with the traditional transmission line, the transmission line has the advantages of easy integration, suitability for multi-channel transmission, low insertion loss and reflection loss, low profile, bending resistance, low hygroscopicity and the like; the method is suitable for the big data communication requirements of the MIMO technology and the information communication, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of transmission lines, in particular to a flexible light and thin multi-channel transmission line.
Background
In 2017, the apple company applies the liquid crystal polymer antenna and the soft board on the flagship machine in the first scale for improving the high-frequency performance of the antenna and reducing the space occupation. The single-machine value of the flexible board antenna is about $ 8-10, the single-machine value of the independent PI antenna of the iPhone7 is about $ 0.4, and the single-machine value is improved by about 20 times from the PI antenna to the flexible board antenna. iPhoneX also uses soft boards in trunks and cameras. The iPhoneX first-degree scale soft board using method has great significance, can be interpreted as the advance layout and verification of 5G apples, and for the consumer electronics industry, the soft board is becoming a new soft board technology wave under the high-frequency high-speed and miniaturization trends.
The flexibility of the soft board is the key of miniaturization of the soft board, the soft board has good flexibility and high-frequency high-speed performance, the soft board multichannel transmission line replaces a PI soft board under the miniaturization trend, the soft board multichannel transmission line replaces an antenna transmission line and a traditional high-speed interface transmission line, the class expansion is expected to be realized by configuring a soft board multichannel transmission line antenna for each new iPhone of 2018, the soft board multichannel transmission line antenna is expected to be applied to full-line products such as iPad and the like in the future, meanwhile, the android high-end machine type is expected to follow up step by step, and the number of the antennas is increased and the design is more complex along with the popularization of MIMO and the increase of the order of the MIMO. Considering only portions of the handset antenna, we expect the 2017 and 2021 market for a flexible board multi-channel transmission line antenna to grow from $ 3.72 billion to $ 42.42 billion. The packaging of flexible printed circuit multi-channel transmission lines integrating components such as antennas and radio frequency front ends is a long-term trend.
Along with the great pursuit of miniaturization of mobile phones, wearable products and the like, embedding components in multilayer circuit boards is a long-term development trend of industry technologies. The number of components in the 5G antenna and the radio frequency front end is increased sharply, and the demand for embedding and packaging the millimeter wave circuit in the multilayer circuit board is increasingly urgent. The flexible board multi-channel transmission line with the multi-layer structure can realize the modularized packaging of high-frequency circuits such as an antenna, a radio frequency front end and the like, and the functional property and the product value of the flexible board multi-channel transmission line are improved qualitatively.
With the development of wireless communication technology in recent years, terminal devices are becoming thinner and lighter, and a challenge is presented to the traditional single-wire single-channel mode. Currently, new design requirements for transmission lines in the industry mainly include low profile (i.e., compact and thin profile), low loss, multi-channel transmission, and low power consumption. The traditional transmission line comprises a coaxial line, a microstrip line, a strip line, a waveguide line and the like, wherein the coaxial line has the characteristics of interference resistance and low loss, but the transmission characteristic of a single line and a single channel inevitably causes the complex and difficult installation of the transmission line; waveguide transmission has high power capacity and low loss characteristics, but generally has higher cost and heavier equipment; although the microstrip line has a low profile advantage, it is difficult to achieve both broadband and low-loss transmission characteristics.
In summary, the coaxial line, the microstrip line and the waveguide line all do not meet the design requirement of the novel transmission line. The strip line has the characteristics of low loss and interference resistance, and more importantly, multi-channel signal transmission can be designed. With the development of material technology, flexible materials with low dielectric constant and low reflection angle tangent parameters are designed, and a basic material is provided for the invention. Generally, in order to match the impedance of a transmission line to an element such as an antenna or a radio frequency circuit, the cross section of a strip line is relatively low, and the transmission line is easily broken by long-term bending. The mechanical strength of the antenna can be enhanced by thickening the transmission line, but the impedance matching between the signal line and the antenna and the impedance matching between the signal line and the radio frequency front end and the bending resistance of the signal line are difficult to ensure. The novel transmission line based on the flexible material has the advantages of bending resistance, low loss and low section of the transmission line, and has a promoting effect on the application of the MIMO multi-channel technology.
Disclosure of Invention
The invention aims to provide a flexible light and thin multi-channel transmission line.
In order to solve the technical problem, the invention provides a flexible light and thin multi-channel transmission line, which comprises a plurality of layers of transmission line ports, a middle transmission line and a plurality of layers of transmission line ports, wherein the plurality of layers of transmission line ports are sequentially connected;
the middle conducting layer comprises a first metal layer, a first dielectric layer, a middle wiring layer, a second dielectric layer and a second metal layer which are sequentially arranged, and a first metalized through hole penetrating through the first metal layer, the first dielectric layer, the middle wiring layer, the second dielectric layer and the second metal layer;
the multi-layer transmission line port comprises a third medium layer connected with the first medium layer, a port wiring layer connected with the middle wiring layer, a fourth medium layer connected with the second medium layer, a metalized grounding hole penetrating through the third medium layer, the port wiring layer and the fourth medium layer, a first metalized connecting hole penetrating through the third medium layer and the port wiring layer and a bonding pad connected with the first metalized connecting hole.
Furthermore, the middle routing layers comprise one or more, and when the middle routing layers comprise a plurality of routing layers, the first metalized through holes are respectively arranged between the adjacent middle routing layers.
Furthermore, a plurality of first metalized grounding holes are respectively formed in two ends of the middle wiring layer.
Furthermore, the first dielectric layer, the second dielectric layer, the third dielectric layer and the fourth dielectric layer are made of flexible materials with low dielectric constant and low hygroscopicity.
Further, the surface of the intermediate conductive wire is coated with an insulating material layer.
Furthermore, the first dielectric layer and the first metal layer, and the second dielectric layer and the second metal layer are connected by a glue-free pressing mode.
Furthermore, the pad and the first metalized connecting hole are coaxially arranged, and the outer diameter of the pad is larger than that of the first metalized connecting hole.
Furthermore, the multilayer transmission line port with middle conducting wire includes the multilayer respectively, in the middle conducting wire middle routing layer includes a plurality ofly, every layer in the middle conducting wire a plurality of middle routing layers are crisscross to be set up.
Furthermore, the bonding pads comprise a plurality of bonding pads, and each bonding pad is connected with the corresponding port wiring layer through the first metalized connecting hole.
Compared with the traditional transmission line, the flexible light and thin multi-channel transmission line has the advantages of easy integration, suitability for multi-channel transmission, low insertion loss and reflection loss, low profile, bending resistance, low hygroscopicity and the like; the method is suitable for the big data communication requirements of the MIMO technology and the information communication, and has wide application prospect.
According to the flexible light and thin multichannel transmission line, the adjacent first metal layer and the second metal layer are connected through the second metalized through holes/blind holes, so that the grounding property is improved; the first metal layer and the second metal layer of the flexible soft board have good flexibility and high-frequency high-speed performance, so that the flexible thin multi-channel transmission line is small in size; the first dielectric layer, the second dielectric layer, the third dielectric layer and the fourth dielectric layer are connected in a glue-free pressing mode; the middle routing layer and the port routing layer are positioned between two adjacent dielectric plate layers and are symmetrically embedded into the first dielectric layer, the second dielectric layer, the third dielectric layer and the fourth dielectric layer. The flexible light and thin multi-channel transmission line is provided based on transmission line and electromagnetic field theory research, can realize multi-layer lamination on a low-profile and low-loss flexible material medium, obtains an integrated multi-channel low-loss transmission line combination, and meets the transmission requirements of multiple antennas.
Drawings
Fig. 1 is a schematic structural diagram of a flexible thin multi-channel transmission line according to the present invention;
FIG. 2 is a layered view of the structure of the middle conductive line of the flexible thin multi-channel transmission line according to the present invention;
fig. 3 is a schematic structural diagram of a multi-layer transmission line port of the flexible, thin, multi-channel transmission line according to the present invention;
fig. 4 is a schematic diagram of the grounding of the middle conductive line of the single-layer dual-trace structure of the flexible, thin, multi-channel transmission line according to the present invention;
fig. 5 is a schematic diagram of the grounding of the middle conductive line of the single-layer single-trace structure of the flexible, thin, multi-channel transmission line according to the present invention;
FIG. 6 is a schematic diagram of a flexible thin multi-channel transmission line according to the present invention;
FIG. 7 is a diagram illustrating port identifiers and port pads of a multi-layer transmission line of a flexible, thin, multi-channel transmission line according to the present invention;
fig. 8a, 8b and 8c are simulation data of insertion loss of the flexible thin multi-channel transmission line according to the present invention;
fig. 9a, 9b and 9c are simulation data of return loss of the flexible thin multi-channel transmission line according to the present invention;
labeled as: the multilayer transmission line comprises a multilayer transmission line port 1, a third dielectric layer 11, a port wiring layer 12, a fourth dielectric layer 13, a metalized grounding hole 14, a first metalized connecting hole 15, a bonding pad 16, an intermediate conducting line 2, a first metal layer 21, a first dielectric layer 22, an intermediate wiring layer 23, a second dielectric layer 24, a second metal layer 25, a first metalized through hole 26 and a first metalized grounding hole 27.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 and 9c, a flexible light and thin multi-channel transmission line includes a multi-layer transmission line port 1, a middle conductive line 2, and a multi-layer transmission line port 1 connected in sequence;
the intermediate conducting layer 2 comprises a first metal layer 21, a first dielectric layer 22, an intermediate routing layer 23, a second dielectric layer 24 and a second metal layer 25 which are sequentially arranged, and a first metalized through hole 26 which penetrates through the first metal layer 21, the first dielectric layer 22, the intermediate routing layer 23, the second dielectric layer 24 and the second metal layer 25;
the multi-layer transmission line port 1 comprises a third medium layer 11 connected with a first medium layer 22, a port wiring layer 12 connected with a middle wiring layer 23, a fourth medium layer 13 connected with a second medium layer 24, a metalized grounding hole 14 penetrating through the third medium layer 11, the port wiring layer 12 and the fourth medium layer 13, a first metalized connecting hole 15 penetrating through the third medium layer 11 and the port wiring layer 12 and a bonding pad 16 connected with the first metalized connecting hole 15.
The first dielectric layer 22, the second dielectric layer 24, the third dielectric layer 11 and the fourth dielectric layer 13 are made of flexible materials with low dielectric constant and low hygroscopicity.
The first dielectric layer 22, the second dielectric layer 24, the third dielectric layer 11 and the fourth dielectric layer 13 are made of flexible materials with low dielectric constant and low hygroscopicity. The intermediate routing layer 23 and the port routing layer 12 should reduce bending as much as possible, and routing should be smooth, so as to reduce loss at the bending.
The novel flexible material is adopted as a designed base plate, namely the first metal layer 21 and the second metal layer 25, and has a flexible characteristic, so that the bending resistance and the durability of the flexible light and thin multi-channel transmission line are ensured; the first dielectric layer 22 and the second dielectric layer 24 have low dielectric constant and low reflection angle tangent characteristics, so that the low loss advantage of the transmission line is ensured; in addition, the transmission line structure has low hygroscopicity, and the overall stability of the transmission line structure is ensured; the number of the middle wiring layers 23 is at least one or more, so that the multi-channel multifunctional transmission advantage is ensured; in the case of the intermediate wiring layer 23, the isolation between the wirings can be improved by the first metalized via 26; the first metalized through hole 26 connects the first metal layer 21 and the second metal layer 25 which are adjacent up and down, which is beneficial to improving the grounding stability.
The intermediate wiring layers 23 include one or more, and when the intermediate wiring layers 23 include a plurality of intermediate wiring layers, the first metalized through holes 26 are respectively disposed between adjacent intermediate wiring layers 23.
First metalized grounding holes 27 are respectively formed at two ends of the middle wiring layers 23.
The surface of the intermediate conductive wire 2 is coated with an insulating material layer. In this way, electromagnetic interference of other radio frequency circuits can be avoided.
The first dielectric layer 22 and the first metal layer 21, and the second dielectric layer 24 and the second metal layer 25 are connected by a glue-free pressing manner.
The bonding pad 16 is arranged coaxially with the first metalized connection hole 15, and the outer diameter of the bonding pad 16 is larger than that of the first metalized connection hole 15.
The multilayer transmission line port 1 and the middle conductive line 2 respectively comprise a plurality of layers, the middle wiring layer 23 in the middle conductive line 2 comprises a plurality of layers, and each layer of the middle wiring layer 23 in the middle conductive line 23 is arranged in a staggered mode. The coupling between the respective intermediate wiring layers 23 can be effectively reduced.
The bonding pads 16 comprise a plurality of bonding pads, and each bonding pad 16 is connected with the corresponding port wiring layer 12 through the first metalized connecting hole 15. The dense first metallized connection holes 15 are arranged at the port 1 of the multilayer transmission line, so that the reflection loss at the port can be improved. Each flexible light and thin multichannel transmission line all adopts first metallized connection hole 15/metallized blind hole and top layer metal material pad 16 is connected, and the design of this part can effectively reduce the loss, improves the insertion loss, and wherein, the aperture design of first metallized connection hole 15/metallized blind hole needs to guarantee port routing layer 12 with the impedance match between pad 16 is good, in addition, needs to satisfy the minimum aperture requirement of current technology.
Compared with the traditional transmission line, the flexible light and thin multi-channel transmission line has the advantages of easy integration, suitability for multi-channel transmission, low insertion loss and reflection loss, low profile, bending resistance, low hygroscopicity and the like; the method is suitable for the big data communication requirements of the MIMO technology and the information communication, and has wide application prospect.
According to the flexible light and thin multichannel transmission line, the adjacent first metal layer and the second metal layer are connected through the second metalized through holes/blind holes, so that the grounding property is improved; the first metal layer and the second metal layer of the flexible soft board have good flexibility and high-frequency high-speed performance, so that the flexible thin multi-channel transmission line is small in size; the first dielectric layer, the second dielectric layer, the third dielectric layer and the fourth dielectric layer are connected in a glue-free pressing mode; the middle routing layer and the port routing layer are positioned between two adjacent dielectric plate layers and are symmetrically embedded into the first dielectric layer, the second dielectric layer, the third dielectric layer and the fourth dielectric layer. The flexible light and thin multi-channel transmission line is provided based on transmission line and electromagnetic field theory research, can realize multi-layer lamination on a low-profile and low-loss flexible material medium, obtains an integrated multi-channel low-loss transmission line combination, and meets the transmission requirements of multiple antennas.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make many variations and modifications of the technical solution of the present invention without departing from the scope of the technical solution of the present invention by using the above disclosure, and the technical solution of the present invention is covered by the claims.
Claims (9)
1. The utility model provides a flexible frivolous multichannel transmission line which characterized in that: the transmission line comprises a plurality of layers of transmission line ports, a middle transmission line and a plurality of layers of transmission line ports which are connected in sequence;
the middle conducting layer comprises a first metal layer, a first dielectric layer, a middle wiring layer, a second dielectric layer and a second metal layer which are sequentially arranged, and a first metalized through hole penetrating through the first metal layer, the first dielectric layer, the middle wiring layer, the second dielectric layer and the second metal layer;
the multi-layer transmission line port comprises a third medium layer connected with the first medium layer, a port wiring layer connected with the middle wiring layer, a fourth medium layer connected with the second medium layer, a metalized grounding hole penetrating through the third medium layer, the port wiring layer and the fourth medium layer, a first metalized connecting hole penetrating through the third medium layer and the port wiring layer and a bonding pad connected with the first metalized connecting hole.
2. The flexible thin multi-channel transmission line of claim 1, wherein: the middle routing layer comprises one or more than one, and when the middle routing layer comprises a plurality of layers, the first metalized through holes are respectively arranged between the adjacent middle routing layers.
3. The flexible thin multi-channel transmission line of claim 2, wherein: and first metalized grounding holes are respectively formed at two ends of the middle wiring layers.
4. The flexible thin multi-channel transmission line of claim 1, wherein: the first dielectric layer, the second dielectric layer, the third dielectric layer and the fourth dielectric layer are made of flexible materials with low dielectric constant and low hygroscopicity.
5. The flexible thin multi-channel transmission line of claim 1, wherein: the surface of the middle conducting wire is coated with an insulating material layer.
6. The flexible thin multi-channel transmission line of claim 1, wherein: the first dielectric layer and the first metal layer, and the second dielectric layer and the second metal layer are connected in a glue-free pressing mode.
7. The flexible thin multi-channel transmission line of claim 1, wherein: the bonding pad and the first metalized connecting hole are coaxially arranged, and the size of the bonding pad is larger than the outer diameter of the first metalized connecting hole.
8. The flexible thin multi-channel transmission line of claim 1, wherein: the multilayer transmission line port with middle conducting wire includes the multilayer respectively, in the middle conducting wire middle routing layer includes a plurality ofly, every layer in the middle conducting wire a plurality of middle routing layers are crisscross to be set up.
9. The flexible thin multi-channel transmission line of claim 1, wherein: the bonding pads comprise a plurality of bonding pads, and each bonding pad is connected with the corresponding port wiring layer through the first metalized connecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010304937.3A CN113540730A (en) | 2020-04-17 | 2020-04-17 | Flexible light and thin multi-channel transmission line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010304937.3A CN113540730A (en) | 2020-04-17 | 2020-04-17 | Flexible light and thin multi-channel transmission line |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687600A (en) * | 2010-12-03 | 2012-09-19 | 株式会社村田制作所 | High-frequency signal line |
| WO2013114975A1 (en) * | 2012-01-31 | 2013-08-08 | 株式会社村田製作所 | High frequency signal transmission line and electronic device |
| CN103811837A (en) * | 2012-11-14 | 2014-05-21 | 广州三星通信技术研究有限公司 | Strip transmission line, radio-frequency signal wire and portable terminal |
| CN207083283U (en) * | 2017-03-02 | 2018-03-09 | 东莞市同川精密五金有限公司 | A kind of FPC plates of low-loss high flexibility high-frequency transmission |
-
2020
- 2020-04-17 CN CN202010304937.3A patent/CN113540730A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687600A (en) * | 2010-12-03 | 2012-09-19 | 株式会社村田制作所 | High-frequency signal line |
| WO2013114975A1 (en) * | 2012-01-31 | 2013-08-08 | 株式会社村田製作所 | High frequency signal transmission line and electronic device |
| CN103811837A (en) * | 2012-11-14 | 2014-05-21 | 广州三星通信技术研究有限公司 | Strip transmission line, radio-frequency signal wire and portable terminal |
| CN207083283U (en) * | 2017-03-02 | 2018-03-09 | 东莞市同川精密五金有限公司 | A kind of FPC plates of low-loss high flexibility high-frequency transmission |
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Application publication date: 20211022 |
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