CN108110422A - A kind of PMI foam medium plate strip lines of low-loss lightweight structure - Google Patents
A kind of PMI foam medium plate strip lines of low-loss lightweight structure Download PDFInfo
- Publication number
- CN108110422A CN108110422A CN201711293021.7A CN201711293021A CN108110422A CN 108110422 A CN108110422 A CN 108110422A CN 201711293021 A CN201711293021 A CN 201711293021A CN 108110422 A CN108110422 A CN 108110422A
- Authority
- CN
- China
- Prior art keywords
- loss
- pmi
- line
- printed board
- strip line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention relates to a kind of PMI foam medium plate strip lines of low-loss lightweight structure of microwave transmission, which solves the problems, such as that conventional air printed line form strip line heavier-weight and the loss of printed board form strip line are bigger than normal.The strip lines configuration feature is：Strip line is pressed from both sides the form for carrying printed board by Polymethacrylimide (PMI) foam, and by the foam open channels around printing board surface plain conductor.Strip line in the present invention compared with conventional air printed line form strip line loss of weight up to more than 80%, and have the characteristics that loss is small.The present invention can be widely applied in radar or communication system, and the work(especially suitable for strip line form divides in feeding network.
Description
Technical field
The invention belongs to radar antenna feeder field, it is related to a kind of PMI foam medium strip shapes of low-loss lightweight structure
Line.
Background technology
The present invention is applied to radar antenna feeder system, and strip line is classical microwave transmission line form, with bandwidth,
The advantages that shielding is good has a wide range of applications in microwave transmission and feed field.Conventionally employed printed board or air printed line
Form realize.Printed board form have the advantages that it is light-weight and processing it is simple, but be limited by printed board dielectric material with
The loss tangent value of Gumming glue film is generally lost larger.As document (Yong Aiping, Tang Pu, Wang Jian, one based on strip lines configuration
Body array antenna design, space electronic technology, the 3rd phase in 2009：The strip line of printed board form 58-61.) is employed,
Lighter in weight, but be lost larger.Air printed line is using the structure type of dielectric support bar support metallic inner conductor, and transmission is situated between
Matter is air, thus have the advantages that loss it is small and resistance to high-power, but be subject in practical applications the shortcomings that heavier-weight compared with
Big limitation.Document (Sun Shaoguo, Zhang Yumei, Feng Zujian, large complicated air stripline feeding network engineering design, information and electricity
Sub- engineering, the 1st phase of volume 7,2 months 2009：The air plates line form of dielectric rod support inner wire 22-24.) is employed, it is resistance to
Power is small compared with lossy but heavier-weight and processed complex.In order to solve the disadvantage that conventional band line form, novel strip-like is linear
Formula by document (Wei Xueke, Zhang Hualin, Zhu Ruiping, based on the low-loss feeding network of novel air printed line structure, modern radar,
The 9th phase of volume 37, in September, 2015：It 64-66.) proposes, plates double-sided metal above and below the inner wire printed board of strip line in text
The structure that interlayer beats metallization VIA realizes that document theoretical simulation shows that the strip line loss of the form is smaller, but document is not
Have and disclose the structure with practical meaning in engineering, as printed board support construction and be not known.It additionally can be by air printed line
Metal shell be substituted for composite material and carry out loss of weight, such as document (Tang Baofu, lightweight composite materials row Feed Design, machine in 2005
Tool Electronic Academic proceeding, 26-29.), the aluminum metal shell of conventional air printed line has been changed into carbon fiber in document has added
The composite material of foam, weight saving 42%, but loss is risen, and there are the shortcomings that processed complex.In addition work
In journey also have using cystosepiment folder carry film printed board strip line form, the form lighter in weight but this be limited by cystosepiment with
The loss tangent angle of Gumming glue film, transmission loss are still larger.
In conclusion the realization of strip line is not that heavier-weight is exactly to be lost still without preferable solution at present
It is larger.The present invention realizes strip line in the form of Polymethacrylimide (PMI) foam to be pressed from both sides to load printed board, to understand
The problem of certainly loss of PMI foam mediums is excessive, by the PMI foam open channels around printing board surface conducting wire, the two-sided gold of printed board
Belong to interlayer and employ metallization VIA unicom.After the structure type, weight compared with air plates line form loss of weight 80% with
It is upper suitable with printed board form, it is lost and then declines to a great extent compared with printed board form, be only increased slightly with air plates line form specific loss.
The content of the invention
For existing technical disadvantages, it is an object of the invention to provide a kind of strip lines configuration form, weight is more traditional
Air plates line form significantly mitigates, and is lost and is greatly reduced compared with printed board form.Specific organization plan is as follows：
The low-loss lightweight strip line includes what folder between upper and lower two-layer screen layer, PMI cystosepiments and cystosepiment carried
Printed board.Strip line is from top to bottom shielded layer, PMI cystosepiments, printed board, PMI cystosepiments, shielded layer respectively, and each interlayer is sharp
It is bonded with glued membrane.Cystosepiment wherein around printing board surface conducting wire is provided with groove, and the purpose of open channels is to remove and be situated between
Larger PMI foams are lost in matter, and the section shape of groove can be rectangle, trapezoidal, arc-shaped etc..Shielded layer can be by being coated with
Printed board, sheet metal plate or other coatings with conductive characteristic of metal layer are realized.
Compared with art methods, its advantage is the present invention：
1. the present invention is air around plain conductor, greatly by the PMI cystosepiment open channels around printing board surface conducting wire
Width reduces the dielectric loss of PMI cystosepiments, thus the strip line form of the present invention have the advantages that it is low-loss；
2. selected dielectric material is the smaller organic dielectric material of density in the present invention, due to the support of PMI cystosepiments
Effect, shielded layer can be very thin, therefore inventive tape line lighter in weight, and more traditional air plates line form strip line can subtract
Weigh more than 80%.
The present invention is described in further detail below in conjunction with the accompanying drawings.
Four description of the drawings
Fig. 1 is banding line profile schematic diagram of the present invention, wherein：1- shielded layers, 2-PMI cystosepiments, 3- printed boards,
4- printing board surfaces institute metal cladding, 5-PMI foams institute open channels.
Fig. 2 is the printed board of 100mm long ribbon shapes line of the present invention and equal length, the loss pair of air plates line form strip line
Than figure, the loss of curve 1- printed board form strip lines, the loss of curve 2- air plates line form strip lines, the curve 3- present invention
The loss of strip line.
Five specific embodiments
By embodiment, the present invention will be further described below in conjunction with the accompanying drawings.
One embodiment of the invention is strip lines configuration schematic diagram as shown in Figure 1, and the strip line is by shielded layer 1, PMI foams
Plate 2, printed board 3 form.Printed board upper and lower surface is covered with metal layer 4, and double layer of metal interlayer uses metallization VIA unicom.For
Loss is reduced, the PMI cystosepiments 2 around printing board surface metal layer 4 are provided with groove 5.Shielded layer 1, which may be employed, is covered with gold
Belong to printed board or the metallic plate of layer to realize, PMI cystosepiments 2 are with printed board 3 using the medium of as far as possible low loss tangent value
Material employs the groove of rectangular section to reduce loss in 5 this example of groove.Between shielded layer 1, PMI cystosepiments 2, printed board 3
It is integrally formed using common double faced adhesive tape or other glued membranes bonding.Here shielded layer 1 has selected polyimide to apply copper printed board,
PMI cystosepiments 2 have selected pore PMI foams, and the printed board of polytetrafluoroethyl-ne alkenes has been selected in printed board 3.
The loss of inventive tape line and the comparison that printed board and air plates line form strip line are lost are as shown in Figure 2.
Curve 1 is the loss of printed board form strip line in figure, and curve 2 is the loss of air plates line form strip line, and curve 3 is this hair
The loss of bright strip line.As can be seen from the figure per 100mm, loss is up to 0.062dB to inventive tape line in frequency band, relatively prints
The 0.285dB of sheet form is greatly reduced, suitable with the 0.058dB of air printed line.
For the weight characteristic of more each form strip line, the simulation calculation various form strip line of 100mm long is distinguished.It is imitative
True calculation shows that the 100mm strip line weight of the present invention is only 22g, corresponding printed board form weight is 37g, corresponding air printed line
Form weight is 133g.Inventive tape line is greatly reduced compared with air plates line form weight, and loss of weight amplitude reaches more than 80%, with
Printed board form weight/power ratio also loss of weight more than 40%.
Claims (3)
1. a kind of PMI foam medium plate strip lines of low-loss lightweight structure, it is characterised in that：Include shielded layer, PMI foams
Plate, printed board, wherein the PMI foam mediums plate strip line be successively from top to bottom shielded layer, PMI cystosepiments, printed board,
PMI cystosepiments, shielded layer；The printing board surface has upper and lower double layer of metal cladded conductive line, and double layer of metal plating interlayer up and down
Using metallization VIA unicom；The PMI cystosepiments are provided with groove around printing board surface metal coated conductor.
2. a kind of PMI foam medium plate strip lines of low-loss lightweight structure according to claim 1, feature exist
In：PMI cystosepiments section shape of institute's open channels around metal coated conductor can be rectangle, trapezoidal or arc-shaped.
3. a kind of PMI foam medium plate strip lines of low-loss lightweight structure according to claim 1, feature exist
In：Shielded layer can be by being covered with the metallic plate of printed board, thickness no more than 0.5 millimeter of the coat of metal or having conductive characteristic
Coating is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711293021.7A CN108110422A (en) | 2017-12-08 | 2017-12-08 | A kind of PMI foam medium plate strip lines of low-loss lightweight structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711293021.7A CN108110422A (en) | 2017-12-08 | 2017-12-08 | A kind of PMI foam medium plate strip lines of low-loss lightweight structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108110422A true CN108110422A (en) | 2018-06-01 |
Family
ID=62209392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711293021.7A Pending CN108110422A (en) | 2017-12-08 | 2017-12-08 | A kind of PMI foam medium plate strip lines of low-loss lightweight structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108110422A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585992A (en) * | 2018-11-27 | 2019-04-05 | 中天宽带技术有限公司 | A kind of strip transmission line applied to L and S-band |
| CN109980328A (en) * | 2019-04-28 | 2019-07-05 | 重庆思睿创瓷电科技有限公司 | The manufacturing method of low-pass filter |
| CN114828388A (en) * | 2022-04-28 | 2022-07-29 | 中国电子科技集团公司第十四研究所 | Printed board and structural rod piece integrated method |
| CN115360490A (en) * | 2022-07-27 | 2022-11-18 | 中国船舶重工集团公司第七二四研究所 | Integrated air strip line power division sum-difference network and implementation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021472A1 (en) * | 1994-02-03 | 1995-08-10 | Hollandse Signaalapparaten B.V. | Transmission-line network |
| US6414573B1 (en) * | 2000-02-16 | 2002-07-02 | Hughes Electronics Corp. | Stripline signal distribution system for extremely high frequency signals |
| CN101778531A (en) * | 2010-02-23 | 2010-07-14 | 华为技术有限公司 | Integrated printed circuit board |
| CN103259070A (en) * | 2013-04-12 | 2013-08-21 | 上海安费诺永亿通讯电子有限公司 | Transmission line capable of lowering loss |
-
2017
- 2017-12-08 CN CN201711293021.7A patent/CN108110422A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995021472A1 (en) * | 1994-02-03 | 1995-08-10 | Hollandse Signaalapparaten B.V. | Transmission-line network |
| US6414573B1 (en) * | 2000-02-16 | 2002-07-02 | Hughes Electronics Corp. | Stripline signal distribution system for extremely high frequency signals |
| CN101778531A (en) * | 2010-02-23 | 2010-07-14 | 华为技术有限公司 | Integrated printed circuit board |
| CN103259070A (en) * | 2013-04-12 | 2013-08-21 | 上海安费诺永亿通讯电子有限公司 | Transmission line capable of lowering loss |
Non-Patent Citations (1)
| Title |
|---|
| 韦学科: ""基于新型空气板线结构的低损耗馈电网络"", 《现代雷达》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585992A (en) * | 2018-11-27 | 2019-04-05 | 中天宽带技术有限公司 | A kind of strip transmission line applied to L and S-band |
| CN109585992B (en) * | 2018-11-27 | 2021-03-16 | 中天宽带技术有限公司 | Strip transmission line applied to L and S wave bands |
| CN109980328A (en) * | 2019-04-28 | 2019-07-05 | 重庆思睿创瓷电科技有限公司 | The manufacturing method of low-pass filter |
| CN114828388A (en) * | 2022-04-28 | 2022-07-29 | 中国电子科技集团公司第十四研究所 | Printed board and structural rod piece integrated method |
| CN115360490A (en) * | 2022-07-27 | 2022-11-18 | 中国船舶重工集团公司第七二四研究所 | Integrated air strip line power division sum-difference network and implementation method |
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| PB01 | Publication | ||
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Application publication date: 20180601 |