CN114094317B - Multilayer composite material strip line antenna, integrated forming die and method - Google Patents
Multilayer composite material strip line antenna, integrated forming die and method Download PDFInfo
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- CN114094317B CN114094317B CN202111231603.9A CN202111231603A CN114094317B CN 114094317 B CN114094317 B CN 114094317B CN 202111231603 A CN202111231603 A CN 202111231603A CN 114094317 B CN114094317 B CN 114094317B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000011185 multilayer composite material Substances 0.000 title claims abstract description 11
- 238000003466 welding Methods 0.000 claims abstract description 41
- 238000003825 pressing Methods 0.000 claims abstract description 28
- 239000002313 adhesive film Substances 0.000 claims abstract description 25
- 239000006260 foam Substances 0.000 claims abstract description 24
- 239000003292 glue Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract 2
- 239000000758 substrate Substances 0.000 claims description 86
- 239000002131 composite material Substances 0.000 claims description 15
- 238000005476 soldering Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004760 aramid Substances 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 229920007790 polymethacrylimide foam Polymers 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910052902 vermiculite Inorganic materials 0.000 claims description 3
- 235000019354 vermiculite Nutrition 0.000 claims description 3
- 239000010455 vermiculite Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000000465 moulding Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 16
- 238000012545 processing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
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- Details Of Aerials (AREA)
Abstract
The invention relates to a multi-layer composite material strip line antenna, an integrated forming die and a method, wherein the die consists of a forming die and a welding tool; the forming process comprises the following steps: the lower reflecting plate is welded with the lower cross beam of the plug support; paving a skin, a lower reflecting plate, a glue film, foam, a glue film and an intermediate belt line; welding a plug; paving an adhesive film, foam, the adhesive film and an upper reflecting plate; the upper reflecting plate is welded with the upper cross beam of the plug support; paving a skin, a separation film, a tooling pressing plate and an airfelt; solidifying and forming; and (5) demolding and post-treatment. According to the invention, through the design of the groove structure on the welding tool and the forming die, the synchronous placement and welding precision of the internal welding connector in the antenna forming process is ensured, the one-time co-curing forming of the electric unit, the structural unit and the connector in the multi-layer strip line antenna is realized, the defects of multiple times of molding and curing, easy deformation of the forming and the like of the existing multi-layer strip line antenna are overcome, and the high-precision and short-period production of the large-size strip line antenna is realized.
Description
Technical Field
The invention belongs to the field of antennas and processing and manufacturing thereof, and relates to a multi-layer composite material strip line antenna and an integrated forming method, which are mainly applied to a microwave array antenna system with light weight, large size and high precision required by radars, communication and the like
Background
The strip line antenna has a series of advantages of low cost, low side lobe, easy array and the like, and is widely applied to the fields of radar, mobile communication, aerospace and the like. A stripline antenna is typically composed of an electrical unit, a structural unit, and a connector. The electric unit is composed of a microstrip substrate such as a reflecting plate, a circuit board and the like and a low dielectric property material, and plays a role in transmitting and receiving electromagnetic signals. The structural unit is made of nonmetallic composite materials and plays a role in supporting and protecting the electric unit. The connector needs to be reliably connected with a circuit board in the electrical unit to play a role in transmitting signals.
Currently, there are two manufacturing processes commonly used for stripline antennas. The forming method is that the structural unit is cured and formed separately, then is glued and formed with the electrical unit for the second time, finally, the strip line antenna is formed, and a specific forming method of the strip line antenna is disclosed in a comparison document 1 (research on a multi-layer microstrip antenna composite forming process technology, wei Shengwen, an electronic process technology, 295-297), and the technical process of the method is as follows: the structural unit formed by the carbon fiber/honeycomb interlayer is firstly cured and formed separately, then is secondarily glued and formed with the electrical unit formed by the foam, the microstrip substrate and the like, and finally the strip line antenna is formed. Another molding method is that the electrical unit is cured and welded with the connection device for multiple times, and then is glued and molded with the structural unit for two times to form the strip line antenna, and the comparison document 2 (CN 102157786 a) discloses a molding method of the second strip line antenna, in which the electrical unit is bonded with the semi-finished product 1, the semi-finished product 2, the semi-finished products 1 and 2 are integrally bonded with each other for 3 times, and then is welded with the connection device, and finally is cured and molded with the structural unit for the 4 th time to form the strip line antenna.
The strip line antenna processing and manufacturing method has the following defects:
(1) When the structural unit or the electrical unit is formed at a high temperature independently and then is formed by bonding, solidifying and forming for the second time, the strip line antenna is easy to generate thermal deformation in the manufacturing process due to different thermal expansion coefficients of materials of each layer, and is not suitable for manufacturing the large-size and high-precision strip line antenna structural unit.
(2) The strip line antenna processing process needs multiple curing and forming, has the defects of long manufacturing period, difficult control of secondary cementing precision and the like, and cannot meet the processing requirement of the strip line antenna on the short production period.
The design requirement of a strip line antenna of a certain product meets the indexes of high dimensional accuracy, short production period and the like, and the existing strip line processing technology method can not meet the application requirement.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects of the existing strip line antenna processing technology method, and realizes the one-time co-curing molding of an electric unit, a structural unit and a connector by technical means such as the advanced welding of the connector and a reflective microstrip substrate, the pre-embedding treatment of the connector on a molding die, thereby obtaining a novel strip line antenna integrated molding technology method, solving the defects of processing deformation, long processing period and the like existing in the existing strip line antenna molding method, and meeting the index requirements of the strip line antenna on high dimensional precision and short production period.
Technical proposal
The multi-layer composite material strip line antenna comprises a structural unit, an electrical unit and a connector, wherein the electrical unit consists of a lower reflection microstrip substrate, a circuit microstrip substrate, an upper reflection microstrip substrate, 4 layers of adhesive films and 2 layers of foams; the structural unit consists of 2 layers of skins; the skin, the lower reflection microstrip substrate, the adhesive film, the foam, the adhesive film, the line microstrip substrate, the adhesive film, the foam, the adhesive film, the upper reflection microstrip substrate and the skin are sequentially arranged from bottom to top; the connector is characterized by comprising a connector support, a connector plug, a connector lower pressing plate and a connector upper pressing plate, wherein the connector plug is arranged on the connector support, and an inner core of the connector plug is welded with the circuit microstrip substrate; the connector upper pressing plate is fixedly connected with the upper reflection microstrip substrate and the connector support, and the connector lower pressing plate is fixedly connected with the lower reflection microstrip substrate and the connector support.
The invention further adopts the technical scheme that: the connector support include the boss down, be equipped with the round hole of installation connector plug in the middle of boss down, be equipped with 4 screw holes around the round hole, one side of boss down is equipped with entablature and entablature respectively, the both ends of homonymy are equipped with the cylinder of opening the screw hole.
The invention further adopts the technical scheme that: the adhesive film is an epoxy low-dielectric adhesive film, the thickness is 50 mu m, the loss tangent is 0.004-0.008, and the curing temperature is 125-135 ℃.
The invention further adopts the technical scheme that: the skin is an aramid/epoxy composite material, the thickness is 0.15mm, the loss tangent is 0.01-0.016, and the curing temperature is 125-135 ℃.
The invention further adopts the technical scheme that: the foam is PMI foam, and the loss tangent is 0.0001-0.0006.
An integrated forming die of a multi-layer composite material strip line antenna is characterized by comprising a forming die and a welding tool; the forming die is of a flat plate structure, and the upper surface of the forming die is provided with a positioning pin matched with the lower reflection microstrip substrate, the circuit microstrip substrate and the upper reflection microstrip substrate and a groove structure for installing a connector; the length of the groove structure is consistent with the length of the connector support, the width is the sum of the width of the lower boss of the connector support and the width of the lower pressing plate of the connector, and the depth of the groove structure is consistent with the height of the lower boss of the connector support; the welding tool is of a flat plate structure, a convex structure is arranged at the edge part of the upper surface, and a concave structure is arranged at the middle part; the convex structure is used for welding and positioning the lower reflection microstrip substrate, and the height of the convex structure is 1mm larger than the thickness of the lower reflection microstrip substrate; the concave structure is used for welding and positioning the connector support, and the length, width and depth of the concave structure are consistent with the size of the connector support.
The invention further adopts the technical scheme that: the forming die is of a hollow structure.
The invention further adopts the technical scheme that: the forming die is made of 45 steel.
The invention further adopts the technical scheme that: the welding tool is made of vermiculite materials with the heat conductivity coefficient of 0.05W/m.k.
The integrated forming method of the multi-layer composite material strip line antenna is characterized by comprising the following steps of:
step 1: the connector support is arranged in a concave structure on the welding tool, and soldering paste is smeared at the lower cross beam of the connector support;
step 2: the lower reflection microstrip substrate is placed on the upper surface of the welding tool, the connector lower pressing plate is placed on the reflection microstrip substrate, and after the lower reflection microstrip substrate, the connector support and the connector lower pressing plate are connected through threads, the lower reflection microstrip substrate and the lower cross beam of the connector support are welded into a middle piece through lead soldering;
step 3: after an isolation film is paved on the forming die, a skin, a middleware, a glue film, foam, a glue film and a circuit microstrip substrate are paved in sequence; wherein the connector portion of the intermediate piece is located within the groove structure of the forming die;
step 4: after the connector plug is connected with the connector support through threads, the connector plug is welded with the circuit microstrip substrate together through lead and tin;
step 5: sequentially paving a glue film, foam, a glue film and an upper reflection microstrip substrate on the circuit microstrip substrate;
step 6: coating soldering paste on the upper beam of the connector support;
step 7: the upper reflection microstrip substrate is welded with an upper cross beam of the connector support into a whole through lead soldering after being connected with an upper pressing plate of the connector in a threaded manner;
step 8: then paving the skin, the isolating film, the tooling pressing plate and the airfelt in sequence, sealing the vacuum bag, and starting heating and curing according to curing parameters;
step 9: and after curing, cutting edges and sealing edges to obtain a final product.
Advantageous effects
The invention provides an integrated forming die and a forming method of a multi-layer composite material strip line antenna, which ensure synchronous placement and welding precision of an internal welding connector in the antenna forming process by a welding tool and a groove structure designed on the forming die, realize one-time co-curing forming of an electric unit, a structural unit and a connector in the multi-layer strip line antenna, and solve the defects of multiple forming curing times, easy forming and the like of the existing multi-layer strip line antenna. The results of hundred sets of sample pieces on a certain military model show that: the strip line antenna prepared by the method has high dimensional accuracy, short production period and stable and reliable quality.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a strip line antenna structure;
FIG. 2 is a schematic view of a plug support structure;
FIG. 3 is a schematic diagram of a molding die structure;
FIG. 4 is a schematic structural diagram of a welding tool;
fig. 5 is a schematic diagram of the molding according to the present invention.
In the figures, 1-connector holders; 2-welding a tool; a lower cross member of the 3-connector mount; 5-a lower reflective microstrip substrate; 6-a connector lower platen; 7-middleware; 8-forming a mold; 9-covering; 10-adhesive film; 11-foam; 12-a line microstrip substrate; 13-connector plug; 14-an upper reflective microstrip substrate; 15-upper cross member of the connector mount; 16-connector upper platen; 17-a tooling pressing plate; 18-locating pins; 19-groove structure of forming mould; a lower boss of the 20-connector mount; t: the height of the lower boss; v: lower boss width.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The multi-layer composite material strip line antenna comprises a structural unit, an electrical unit and a connector, wherein the electrical unit comprises a lower reflection microstrip substrate 5, a circuit microstrip substrate 12, an upper reflection microstrip substrate 14, 4 layers of adhesive films 10 and 2 layers of foams 11; the structural unit consists of 2 layers of skins 9; the skin 9, the lower reflection microstrip substrate 5, the adhesive film 10, the foam 11, the adhesive film 10, the circuit microstrip substrate 12, the adhesive film 10, the foam 11, the adhesive film 10, the upper reflection microstrip substrate 14 and the skin 9 are sequentially arranged from bottom to top; the connector consists of a connector support 1, a connector plug 13, a connector lower pressure plate 6 and a connector upper pressure plate 16. The connector support 1 comprises a lower boss 20, the lower boss 20 is of a vertical cuboid structure, a round hole is formed in the middle of the lower boss 20, 4 threaded holes are formed in the periphery of the round hole, an inner core of a connector plug 13 penetrates through the round hole, four holes of a flange plate of the connector plug 13 are aligned with the 4 threaded holes and fixed together through screws, an upper cross beam 15 and a lower cross beam 3 are respectively arranged on one side of the lower boss 20, the upper cross beam 15 and the lower cross beam 3 are respectively located at the upper position and the lower position of the upper threaded holes, columns with threaded holes are formed in the two ends of the same side of the upper cross beam 15 and the lower cross beam 3, one end of each column is fixed with a lower reflective microstrip substrate 5 and a connector lower press plate 6 through screws when assembled, the other end of each column is fixed with an upper reflective microstrip substrate 14 and a connector press plate 16 through screws, the connector press plate 6 is used for enabling the lower reflective microstrip substrate 5 to be in contact with the connector support 1 stably, and the connector press plate 16 is used for enabling the upper reflective microstrip substrate 14 to be in contact stably with the connector press plate 16, and accordingly the grounding performance of a strip line is guaranteed.
The invention also provides an integrated forming die of the multi-layer composite strip line antenna, which consists of a forming die 8 and a welding tool 2; the forming die 8 is of a flat plate structure formed by splicing and welding an integral frame; the corresponding positions are respectively provided with a positioning pin 18 and a groove structure 19; the positioning pins 18 are used for precisely positioning the multi-layer microstrip substrate during high-temperature forming, and positioning holes matched with the positioning pins 18 are formed in the same positions of the lower reflection microstrip substrate 5, the circuit microstrip substrate 12 and the upper reflection microstrip substrate 14, and the number of the positioning pins 18 is multiple; the groove structure 19 is used for precisely positioning in the connector forming process, the length of the groove structure 19 is consistent with the length of the connector support 1, the width is the sum of the width v of the lower boss 20 of the connector support 1 and the width of the lower pressing plate 6 of the connector, the depth of the groove structure is consistent with the height t of the lower boss 20 of the connector support 1, and the number of the groove structures is identical with that of the input ports of the strip line antenna. The welding tool 2 is used for lead-tin welding of the lower reflection microstrip substrate 5 and the connector support 1, the structure is a flat plate structure, the length is 200mm larger than the length of the connector support 1, and the width is consistent with the width of the lower reflection microstrip substrate 5; the edge part of the upper surface of the welding tool 2 is provided with a convex structure, and the middle part is provided with a concave structure; the convex structure is used for welding and positioning the lower reflection microstrip substrate 5, and the height of the convex structure is 1mm larger than the thickness of the lower reflection microstrip substrate 5; the concave structure is used for welding and positioning the connector support 1, and the length, the width and the depth of the concave structure are consistent with the size of the connector support 1.
The invention also provides an integrated forming method of the multi-layer composite material strip line antenna, which adopts the integrated forming die and specifically comprises the following steps:
step 1: the connector support 1 is placed on the welding tool 2, and soldering paste is smeared at the lower cross beam 3 of the connector support 1;
step 2: the lower reflection microstrip substrate 5 is placed on the welding tool 2, is connected with the connector lower pressing plate 6 through threads, and then the lower reflection microstrip substrate 5 and the lower beam 3 of the connector support 1 are welded into a middle piece 7 through lead soldering;
step 3: after an isolation film is paved on the forming die 8, a skin 9, a middle piece 7, a glue film 10, foam 11, the glue film 10 and a circuit microstrip substrate 12 are paved in sequence; wherein the connector portion of the intermediate piece is located in the groove structure 19 of the forming die 8;
step 4: after the connector plug 13 is connected with the connector support 1 through threads, the connector plug 13 and the circuit microstrip substrate 12 are welded together through lead and tin;
step 5: sequentially paving a glue film 10, foam 11, the glue film 10 and an upper reflection microstrip substrate 14 on the line microstrip substrate 12;
step 6: the upper beam 15 of the connector support 1 is smeared with soldering paste;
step 7: the upper reflection microstrip substrate 14 is firstly in threaded connection with the connector upper pressing plate 16, and then the upper reflection microstrip substrate 14 and the upper beam 15 of the connector support 1 are welded into a whole through lead soldering;
step 8: then paving the skin 9, the isolating film, the tooling pressing plate 17 and the airfelt in sequence, sealing the vacuum bag, and starting heating and curing according to curing parameters; the tooling pressing plate 17 is an aluminum plate with the same size as the upper reflection microstrip substrate 14;
step 9: and after curing, cutting edges and sealing edges to obtain a final product.
Example 1:
referring to fig. 1, the antenna is in a foam C sandwich structure and is composed of 11 layers of materials including 4 layers of adhesive films 10, 2 layers of foams 11, 2 layers of skins 9, 1 lower reflection microstrip substrate 5, 1 upper reflection microstrip substrate 14, 1 line microstrip substrate 12 and the like. The same side of the antenna is designed with 3 connectors, and the connectors consist of a plug support 1, a connector plug 13, a connector lower pressing plate 6 and a connector upper pressing plate 16. The antenna has dimensions of 3054mm×200mm×11mm, and the antenna has a required flatness of 0.1mm or less and a side lobe level of-28 db or less (1 GHz-10 GHz). Wherein the adhesive film 10 is an epoxy low dielectric adhesive film, the thickness is 50 mu m, the loss tangent is 0.004-0.008 (1 GHz-10 GHz), and the curing temperature is 125-135 ℃; the skin 9 is an aramid/epoxy composite material, the thickness is 0.15mm, the loss tangent is 0.01-0.016 (1 GHz-10 GHz), and the curing temperature is 125-135 ℃; foam 11 is PMI foam, and has a loss tangent of 0.0001 to 0.0006 (1 GHz to 10 GHz).
Referring to fig. 2, the connector holder 1 is made of aluminum material 2a12, and is silver-plated.
Referring to fig. 3, the forming die 8 is of a frame welding structure, for weight reduction, the forming die is processed into a hollow structure, 45 steel materials are adopted, positioning pins 18 and groove structures 19 are arranged at corresponding positions of the forming die 8, the positioning pins 18 are used for accurately positioning an electrical unit in an antenna in a high-temperature forming process, and the groove structures 19 are used for accurately positioning the connector support 1 in the forming process. The length of the groove structure 19 is consistent with the length of the plug support 1, the width of the groove structure 19 is the sum of the width v of the lower boss 20 of the connector support 1 and the width of the lower pressing plate 6 of the connector, and the depth of the groove structure 19 is consistent with the height t of the lower boss 20 of the connector support 1.
Referring to FIG. 4, the welding fixture 2 is of a flat plate structure, is made of vermiculite materials with low heat conductivity coefficient, and has low heat conductivity coefficient of 0.05W/m.k. The length of the welding tool 2 is 200mm larger than that of the connector support 1, and the width of the welding tool is consistent with that of the lower reflection microstrip substrate 5; the edge part of the upper surface of the welding tool 2 is provided with a convex structure, and the middle part is provided with a concave structure; the convex structure is used for welding and positioning the lower reflection microstrip substrate 5, and the height of the convex structure is 1mm larger than the thickness of the lower reflection microstrip substrate 5; the concave structure is used for welding and positioning the connector support 1, and the length, the width and the depth of the concave structure are consistent with the size of the connector support 1.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The multi-layer composite material strip line antenna comprises a structural unit, an electrical unit and a connector, wherein the electrical unit consists of a lower reflection microstrip substrate (5), a circuit microstrip substrate (12), an upper reflection microstrip substrate (14), a 4-layer adhesive film (10) and 2-layer foam (11); the structural unit consists of 2 layers of skins (9); the skin (9), the lower reflection microstrip substrate (5), the adhesive film (10), the foam (11), the adhesive film (10), the line microstrip substrate (12), the adhesive film (10), the foam (11), the adhesive film (10), the upper reflection microstrip substrate (14) and the skin (9) are sequentially arranged from bottom to top; the connector is characterized by comprising a connector support (1), a connector plug (13), a connector lower pressing plate (6) and a connector upper pressing plate (16), wherein the connector plug (13) is arranged on the connector support (1), and an inner core of the connector plug (13) is welded with a circuit microstrip substrate (12); the connector upper pressing plate (16) is fixedly connected with the upper reflection microstrip substrate (14) and the connector support (1), and the connector lower pressing plate (6) is fixedly connected with the lower reflection microstrip substrate (5) and the connector support (1).
2. The multi-layer composite strip line antenna according to claim 1, characterized in that the connector support (1) comprises a lower boss (20), a round hole for installing the connector plug (13) is arranged in the middle of the lower boss (20), 4 threaded holes are formed in the periphery of the round hole, an upper cross beam (15) and a lower cross beam (3) are respectively arranged on one side of the lower boss (20), and columns with threaded holes are arranged at two ends of the same side.
3. The multi-layer composite strip line antenna according to claim 1, characterized in that the adhesive film (10) is an epoxy low dielectric adhesive film, the thickness is 50 μm, the loss tangent is 0.004-0.008, and the curing temperature is 125-135 ℃.
4. A multi-layer composite strip line antenna according to claim 1, characterized in that the skin (9) is an aramid/epoxy composite material with a thickness of 0.15mm, a loss tangent of 0.01-0.016 and a curing temperature of 125-135 ℃.
5. A multi-layer composite strip line antenna according to claim 1, characterized in that the foam (11) is a PMI foam having a loss tangent of 0.0001 to 0.0006.
6. An integrated forming die of a multi-layer composite strip line antenna according to claim 2, characterized by comprising a forming die (8) and a welding tool (2); the forming die (8) is of a flat plate structure, and the upper surface of the forming die is provided with a positioning pin (18) matched with the lower reflection microstrip substrate (5), the circuit microstrip substrate (12) and the upper reflection microstrip substrate (14) and a groove structure (19) for installing a connector; the length of the groove structure (19) is consistent with the length of the connector support (1), the width is the sum of the width of the lower boss (20) of the connector support (1) and the width of the lower pressing plate (6) of the connector, and the depth of the groove structure is consistent with the height of the lower boss (20) of the connector support (1); the welding tool (2) is of a flat plate structure, a convex structure is arranged at the edge part of the upper surface, and a concave structure is arranged at the middle part; the convex structure is used for welding and positioning the lower reflection microstrip substrate (5), and the height of the convex structure is 1mm larger than the thickness of the lower reflection microstrip substrate (5); the concave structure is used for welding and positioning the connector support (1), and the length, the width and the depth of the concave structure are consistent with the size of the connector support (1).
7. The integrated forming die for the multi-layer composite strip line antenna according to claim 6, wherein the forming die (8) is of a hollowed-out structure.
8. The integrated forming die for the multi-layer composite strip line antenna according to claim 6, wherein the forming die (8) is made of 45 steel.
9. The integrated forming die for the multi-layer composite strip line antenna is characterized in that the welding tool (2) is made of vermiculite material with a heat conductivity coefficient of 0.05W/m.k.
10. An integrated forming method of a multi-layer composite strip line antenna by using the forming die as claimed in claim 6, which is characterized by comprising the following steps:
step 1: the connector support (1) is placed in a concave structure on the welding tool (2), and soldering paste is smeared at the lower cross beam (3) of the connector support (1);
step 2: the lower reflection microstrip substrate (5) is placed on the upper surface of the welding tool (2), the connector lower pressing plate (6) is placed on the reflection microstrip substrate (5), and after the lower reflection microstrip substrate (5), the connector support (1) and the connector lower pressing plate (6) are connected through threads, the lower reflection microstrip substrate (5) and the lower cross beam (3) of the connector support (1) are welded into a middle piece through lead soldering;
step 3: after an isolation film is paved on the forming die (8), a skin (9), an intermediate piece, a glue film (10), foam (11), the glue film (10) and a circuit microstrip substrate (12) are paved in sequence; wherein the connector part of the intermediate piece is located in a groove structure (19) of the forming die (8);
step 4: after the connector plug (13) is connected with the connector support (1) through threads, the connector plug (13) is welded with the circuit microstrip substrate (12) together through lead and tin;
step 5: a glue film (10), foam (11), the glue film (10) and an upper reflection microstrip substrate (14) are sequentially paved on the circuit microstrip substrate (12);
step 6: the upper cross beam (15) of the connector support (1) is coated with soldering paste (4);
step 7: the upper reflection microstrip substrate (14) is connected with the upper pressing plate (16) of the connector in a threaded manner, and then the upper reflection microstrip substrate (14) and the upper cross beam (15) of the connector support (1) are welded into a whole through lead soldering;
step 8: then sequentially paving a skin (9), a separation film, a tooling pressing plate and an airfelt, sealing a vacuum bag, and starting heating and curing according to curing parameters;
step 9: and after curing, cutting edges and sealing edges to obtain a final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN115331965B (en) * | 2022-08-05 | 2024-07-23 | 新疆众和股份有限公司 | Electrode foil, preparation method thereof and capacitor |
| CN115319416A (en) * | 2022-08-19 | 2022-11-11 | 中国电子科技集团公司第三十八研究所 | High-efficiency millimeter wave multilayer antenna low-temperature brazing method |
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