CN114083169B - Flexible connection process method and tool for radio frequency coaxial-to-microstrip - Google Patents
Flexible connection process method and tool for radio frequency coaxial-to-microstrip Download PDFInfo
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- CN114083169B CN114083169B CN202111522241.9A CN202111522241A CN114083169B CN 114083169 B CN114083169 B CN 114083169B CN 202111522241 A CN202111522241 A CN 202111522241A CN 114083169 B CN114083169 B CN 114083169B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D33/00—Special measures in connection with working metal foils, e.g. gold foils
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a flexible connection process method for a radio frequency coaxial-microstrip line, which fixedly connects a radio frequency coaxial core line with the microstrip line through an omega-shaped interconnection connecting line, and comprises the following steps: s1, preparing an omega-shaped interconnection connecting wire by adopting a forming tool, and preparing a high-temperature soldering lug; s2, placing an omega-shaped interconnection connecting wire, a high Wen Hanpian coaxial core wire and a radio frequency coaxial core wire in a spot welding area of a spot welding tool; s3, connecting an omega-shaped interconnection connecting wire, a high Wen Hanpian coaxial radio frequency core wire in a resistance spot welding mode; s4, gold removing treatment is carried out on the microstrip line; and S5, connecting one end of the omega-shaped interconnection connecting wire which is not welded with the radio frequency coaxial core wire with the microstrip line in a soldering iron soldering mode. The coaxial core wire and the microstrip line are interconnected by adopting the high-temperature spot welding and the low-temperature soldering, so that the microwave transmission performance requirement is met, and the coaxial microstrip line has the advantages of high reliability, strong fatigue resistance and strong universality.
Description
Technical Field
The invention belongs to the technical field of microwave assembly, and particularly relates to a flexible connection process method and a tool for a microwave assembly radio frequency coaxial-rotating microstrip.
Background
Along with the continuous improvement of equipment performance requirements, the application of the radio frequency microwave module/component is more and more extensive, the radio frequency coaxial connector is used as the most basic input and output connection unit of microwave products, the transition connection process from the internal conductor core wire to the microstrip line is a key factor for ensuring connection reliability and transmission performance, and how to realize high-reliability connection of radio frequency coaxial-microstrip is a problem of extensive researches of a plurality of students.
In the prior art, researches on connection modes of coaxial-microstrip are mainly focused on the inside of a radio frequency module, and the connection modes include a soldering connection mode and a gold band ring package welding mode. However, as the microwave component product becomes more and more complex, the coaxial core wires of the input/output ports of the assembled microwave module need to be further connected with an external microstrip circuit, and different from the connection in the module, the structure and materials involved in the connection mode are more complex, and the material parameters adopted by the microwave module box body, the microstrip substrate and the microwave component box body may have larger differences, and larger alternating stress is generated at the connection part due to the differences of linear expansion coefficients in the service process.
In the connection mode of radio frequency coaxial-microstrip, although the tin soldering connection mode is favorable for guaranteeing microwave transmission performance, the process method is generally applied to the connection in modules, the connection among different modules or components belongs to a hard connection mode, and in the subsequent environmental service process, alternating stress at welding points is generated to generate creep deformation due to the difference of linear expansion coefficients among different modules or components, and finally, the connection is invalid. The gold belt loop package welding mode has higher requirements on the plating layers on the surfaces of the microstrip line and the radio frequency coaxial core line, a certain ablation risk exists when the interconnection technology is used on the radio frequency microstrip board, the technology control difficulty is high, and the service requirements of products are difficult to meet for the rigidity and the connection reliability of the gold belt loop package interconnection of microwave components with complex structures and large sizes. Meanwhile, a high-reliability interconnection process method for the module coaxial core line and the external microstrip line is not studied.
Disclosure of Invention
The invention aims to provide a flexible connection process method and a tool for a radio frequency coaxial-to-microstrip, which have the advantages of high reliability, strong fatigue resistance and strong universality.
In order to achieve the above purpose, the invention provides a flexible connection process method for converting a radio frequency coaxial line into a microstrip line, wherein a radio frequency coaxial core line is fixedly connected with the microstrip line through an omega-shaped interconnection connecting line, and the flexible connection process method comprises the following steps: s1, preparing an omega-shaped interconnection connecting wire by adopting a forming tool, and preparing a high-temperature soldering lug; s2, placing an omega-shaped interconnection connecting wire, a high Wen Hanpian coaxial core wire and a radio frequency coaxial core wire in a spot welding area of a spot welding tool; s3, connecting an omega-shaped interconnection connecting wire, a high Wen Hanpian coaxial radio frequency core wire in a resistance spot welding mode; s4, gold removing treatment is carried out on the microstrip line; and S5, connecting one end of the omega-shaped interconnection connecting wire which is not welded with the radio frequency coaxial core wire with the microstrip line in a soldering iron soldering mode.
Wherein, the omega-shaped interconnection connecting line is made of rolled copper foil material, and the radius of the arc of the convex part is 0.25-0.35 mm.
Wherein, the preparation of the omega-shaped interconnection connecting wire and the high-temperature soldering lug in the step S1 comprises the following steps: step S101, carrying out surface plating treatment and heat treatment on omega-shaped interconnection connecting wires; step S102, designing a forming tool of an omega-shaped interconnection connecting line according to the requirement of forming size; step S103, manufacturing a plurality of omega-shaped interconnection connecting lines on the rolled copper foil material processed in the step S101 by adopting a forming tool designed in the step S102, and cutting the omega-shaped interconnection connecting lines according to the distance between the radio frequency coaxial core wire and the microstrip line; step S104, preparing the high Wen Hanpian according to the size of the radio frequency coaxial core wire and the spot welding area.
The placement process in step S2 specifically includes: step S201, designing a spot welding tool according to the structure and the external dimension of the radio frequency coaxial connector; step S202, placing a welding end of a radio frequency coaxial core wire on a spot welding tool; step S203, placing a high-temperature soldering lug on the welding end of the radio-frequency coaxial core wire; and S204, placing one end of the omega-shaped interconnection line on the high-temperature soldering lug.
Preferably, the high-temperature soldering lug is a eutectic material, and the melting point of the high-temperature soldering lug is more than or equal to 280 ℃; the melting point of the soldering material used for soldering by the soldering iron is less than or equal to 183 ℃.
Wherein, step S1 the shaping frock for with the suppression of banding calendering copper foil form "omega" shape interconnection connecting wire (6), it includes: the two ends of the bottom of the upper pressing die are respectively provided with a positioning block; the plurality of protruding blocks are arranged between the two positioning blocks in an array manner; the two ends of the top of the lower pressing die are respectively provided with a positioning groove; the plurality of grooves are the same as the number of the convex blocks (811), and the array of the grooves is arranged between the two positioning grooves; the positioning blocks are in one-to-one correspondence with the positions and the shapes of the positioning grooves, and the positions and the shapes of the protruding blocks are in one-to-one correspondence with the positions and the shapes of the grooves.
Preferably, the shape of the protruding block is an omega-shaped protrusion; the shape of the groove is matched with the shape of the protruding block; and placing the rolled copper foil between an upper die and a lower die, clamping each protruding block and each groove in one-to-one correspondence, and applying pressure to the upper die to enable the rolled copper foil to form a plurality of omega-shaped interconnection connecting lines.
Preferably, the forming tool is made of brass materials.
Preferably, the spot welding fixture in step S2 is configured to weld the "Ω" shaped interconnection connecting line with the rf coaxial core line and the microstrip line, respectively, and includes: the center of the supporting table is provided with a hollow structure, and the shape of the hollow structure is matched with the shape and the size of the radio frequency coaxial connector; a plurality of spot welding grooves which are respectively arranged at the edge of the inner ring of the supporting table; the radio frequency coaxial core wire is horizontally arranged in the center of the radio frequency coaxial connector.
Preferably, the spot welding groove includes: a first support portion, a second support portion, and a hollow ring; the two supporting parts are rectangular groove bodies with the depth smaller than that of the hollow ring, and the first supporting part and the second supporting part are symmetrically connected to two sides of the hollow ring; when the omega-shaped interconnection connecting wire is placed in the spot welding groove, one end of the omega-shaped interconnection connecting wire is placed on the corresponding first supporting part, the other end of the omega-shaped interconnection connecting wire is contacted with the welding end of the radio-frequency coaxial core wire placed on the second supporting part and the high-temperature welding lug, and the protruding part of the omega-shaped interconnection connecting wire is positioned in the hollow ring.
Preferably, the spot welding tool is made of synthetic stone materials.
In summary, compared with the prior art, the soft connection process method and the tool for the radio frequency coaxial rotary microstrip provided by the invention have the following beneficial effects:
1. adopting a rolled copper foil material as an interconnection material, and carrying out surface plating and heat treatment on the interconnection material, so that the interconnection material has excellent interconnection welding process performance and anti-fatigue characteristics;
2. accurately forming the interconnected copper foil into an omega shape by adopting a tool according to the transmission performance requirement of the microwave product, and carrying out tin coating treatment on a tin soldering part; firstly, the interconnection of the coaxial core wire and one end of the omega-shaped connecting copper foil is realized by adopting a mode of high Wen Hanpian matched spot welding, and then the interconnection of the other end of the coaxial core wire and the microstrip line is realized by adopting a low-temperature soldering mode, wherein the low-temperature soldering cannot cause remelting of a high Wen Dianhan welding spot;
3. the process method is stable and reliable, has excellent fatigue resistance of the interconnection welding spots, and is particularly suitable for high-reliability interconnection of the coaxial core wire and the microstrip line of the microwave component with large linear expansion coefficient difference and complex structure.
Drawings
Fig. 1 is a schematic diagram of an rf coaxial-to-microstrip connection embodiment of the present invention;
FIG. 2 is an enlarged view of the "omega" shaped interconnect line of FIG. 1;
FIG. 3 is a schematic diagram of an omega-shaped copper foil forming tool;
FIG. 4 is a schematic diagram of a module spot welding tooling structure;
fig. 5 is an enlarged view of the "core spot welding area" in fig. 4.
Detailed Description
The technical scheme, constructional features, achieved objects and effects of the embodiments of the present invention will be described in detail below with reference to fig. 1 to 5 in the embodiments of the present invention.
It should be noted that, the drawings are in very simplified form and all use non-precise proportions, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention, and are not intended to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any modification of structure, change of proportion or adjustment of size, without affecting the efficacy and achievement of the present invention, should still fall within the scope covered by the technical content disclosed by the present invention.
It is noted that in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a flexible connection process method and a tooling for a microwave assembly radio frequency coaxial-to-microstrip, as shown in figure 1, wherein the microwave assembly comprises: the micro-strip substrate 1, the module box body 2, the assembly body 3 and the radio frequency coaxial connector 4; the microstrip substrate 1 and the module box body 2 are fixedly arranged on the assembly box body 3 in a threaded connection mode; the rf coaxial connector 4 is soldered to the module case 2. Further, as shown in fig. 1, the radio frequency coaxial connector 4 is horizontally provided with a radio frequency coaxial core wire 5 at the center thereof; a microstrip line 7 is fixed on the microstrip substrate 1; the radio frequency coaxial core wire 5 is fixedly connected with the microstrip line 7 by adopting an omega-shaped interconnection connecting wire 6. According to the invention, the radio frequency coaxial core wire 5 of the input/output port of the complex microwave component is connected with the external microstrip line 7 (namely an external microstrip circuit) through the omega-shaped interconnection connecting wire 6.
Wherein the enlarged view of the omega-shaped interconnection line is shown in fig. 2, in the present embodiment, the diameter D of the rf coaxial core wire 5 a 0.35mm, the core wire is made of kovar alloy, and the surface is plated with gold; the width of the microstrip line 7 is 0.55mm, the microstrip line material is copper, the surface is plated with nickel and gold, and the thickness h of the microstrip line 7 is 15-40 mu m; by a means ofThe material of the omega-shaped interconnection line 6 is a rolled copper foil, the thickness of the copper foil (namely, the thickness of the omega-shaped interconnection line 6) is 0.04mm, the width of the copper foil (namely, the width of the omega-shaped interconnection line 6) is 0.5mm, and the arc radius r of the convex part of the omega-shaped interconnection line 6 is equal to the thickness of the copper foil 1 And the arc radius r of the connection part of the convex part and the straight part of the omega-shaped interconnection connecting line 6 2 Is 0.3mm in size; wherein the arc radius range of the protruding part is 0.25-0.35 mm; further, one end of the omega-shaped interconnection connecting wire 6 is connected with the radio frequency coaxial core wire 5 through a high Wen Dianhan to form a spot welding spot A, and the other end is connected with the microstrip line 7 through low-temperature soldering to form a soldering spot B, so that the soft connection of the radio frequency coaxial-to-microstrip is realized.
Wherein, the high Wen Hanpian used in the spot welding spot A is gold-germanium alloy; the material used in the soldering spot B is SnPb soldering tin wire, and the diameter of the soldering tin wire is 0.5mm. According to the invention, the two ends of the omega-shaped interconnection connecting wire 6 are welded by adopting different welding methods and welding materials with different melting points, so that the welding of the omega-shaped interconnection connecting wire 6, the radio frequency coaxial core wire 5 and the microstrip line 7 is more stable and reliable.
As shown in fig. 3, the forming tool provided by the invention is used for pressing strip-shaped rolled copper foil to form an omega-shaped interconnection connecting wire 6, and comprises: the upper pressing die 801 is provided with positioning blocks 812 at two ends of the bottom; a plurality of protruding blocks 811 arranged in an array between two positioning blocks 812; a lower die 802, the two ends of the top of which are respectively provided with a positioning groove 822; a plurality of grooves 821, the same number as the protruding blocks 811, arranged in an array between two positioning grooves 822; the positioning blocks 812 are in one-to-one correspondence with the positions and the shapes of the positioning grooves 822, and the protruding blocks 811 are in one-to-one correspondence with the positions and the shapes of the grooves 821; when the rolled copper foil is placed on the lower die 802, the two ends of the rolled copper foil do not cover the two positioning grooves 822 at the two ends of the lower die 802, the upper die 801 is pressed on the lower die 802, the positioning blocks 812 are clamped with the positioning grooves 822 at this time, each protruding block 811 is clamped with each groove 821 in a one-to-one correspondence, a certain pressure is applied to the upper die 801, and finally the rolled copper foil forms a plurality of omega-shaped interconnection lines 6.
Wherein, the shape of the protruding block 811 is an omega-shaped protruding to meet the microwave transmission performance requirement; the shape of the groove 821 is matched with the shape of the protruding block 811, namely, the protruding block 811 is tightly attached to each other when being clamped into the groove 821, so that an omega-shaped interconnection line 6 with the corresponding shape and size can be formed on the rolled copper foil in a pressing mode; further, the forming tool is made of brass materials.
As shown in fig. 4, the spot welding tool provided by the present invention is used for welding and connecting an "Ω" shaped interconnection connecting line 6 with a radio frequency coaxial core line 5 and a microstrip line 7, and includes: the center of the supporting table 9 is provided with a hollow structure, and the shape of the hollow structure is matched with the shape and the size of the radio frequency coaxial connector 4; a plurality of spot welding grooves 901 which are respectively formed on the edge of the inner ring of the supporting table 9 and serve as spot welding areas; as shown in fig. 4 and 5, the present embodiment is provided with 2 spot welding grooves, and the spot welding groove 901 includes: two supports and a hollow ring 913; each supporting part is a rectangular groove body with the depth smaller than that of the hollow ring 912, and the two supporting parts are symmetrically connected to two sides of the hollow ring 912, wherein the first supporting part 911 is used for supporting one end of the omega-shaped interconnection connecting wire 6 connected with the microstrip line 7, the second supporting part 912 is used for supporting the welding end of the radio-frequency coaxial core wire 5, and the welding end of the radio-frequency coaxial core wire 5 is connected with one end of the omega-shaped interconnection connecting wire 6 which is not connected with the microstrip line; when the omega-shaped interconnection line 6 is placed on the spot welding groove 901, the convex part of the omega-shaped interconnection line 6 is positioned in the hollow ring 913, so that one end of the omega-shaped interconnection line 6 is just placed on the corresponding first supporting part 911, and the other end is contacted with the welding end of the radio frequency coaxial core wire 5 placed on the second supporting part 912 and the high-temperature soldering lug; the spot welding tool is made of synthetic stone materials, and can resist high temperature and static electricity.
It should be noted that, the process method for carrying out soft connection on the radio frequency coaxial core wire 5 and the microstrip line 7 by adopting the forming tool and the spot welding tool comprises the following steps:
s1, preparing an omega-shaped interconnection connecting wire 6 and a high-temperature soldering lug by using the forming tool;
s2, correspondingly placing an omega-shaped interconnection connecting wire 6, a high Wen Hanpian and a radio frequency coaxial core wire 5 in a spot welding area of the spot welding tool;
s3, performing spot welding connection on the omega-shaped interconnection connecting wire 6, the high Wen Hanpian and the radio frequency coaxial core wire 5 by adopting a resistance spot welding mode;
s4, gold removing treatment is carried out on the microstrip line 7; soldering the end of the omega-shaped interconnection connecting wire 6 which is not soldered with the radio frequency coaxial core wire 5 with the microstrip line 7 in a soldering iron soldering manner;
through the steps S1 to S4, the radio frequency coaxial core wire 5 is connected with the microstrip line 7 through the omega-shaped interconnection connecting wire 6, and finally welding spots are cleaned and welding quality inspection is carried out.
Wherein the high-temperature soldering lug is a eutectic material, and the melting point of the high-temperature soldering lug is more than or equal to 280 ℃; the melting point of the soldering material used for soldering by the soldering iron is less than or equal to 183 ℃.
The preparation of the omega-shaped interconnection line 6 and the height Wen Hanpian in the step S1 specifically includes the following steps:
step S101, carrying out surface plating treatment and heat treatment on the rolled copper foil material adopted by the omega-shaped interconnection connecting wire 6;
step S102, designing a forming tool of the omega-shaped interconnection connecting line 6 according to the requirement of forming size;
step S103, adopting a forming tool designed in the step S102 to manufacture the rolled copper foil material processed in the step S101 into an omega-shaped interconnection connecting line 6, and cutting the omega-shaped interconnection connecting line 6 according to the distance between the radio frequency coaxial core wire 5 and the microstrip line 7 so as to meet the matching requirement;
step S104, preparing a high Wen Hanpian according to the size of the radio frequency coaxial core wire 5 and the spot welding area.
Further, in the step S101, the surface plating treatment of the rolled copper foil material is nickel-gold plating treatment, so as to ensure that the copper foil has good solderability; annealing treatment at the temperature of 350-400 ℃ is carried out to ensure that the copper foil has good anti-fatigue property; the height Wen Hanpian prepared in the step S105 was 0.0254mm in thickness and 0.3mm in length and width, and was prepared by cutting under a microscope.
The placement process in step S2 specifically includes:
step S201, designing a spot welding tool according to the structure and the external dimension of the radio frequency coaxial connector 4;
step S202, placing the welding end of the radio frequency coaxial core wire 5 on a second supporting part 912 in a spot welding groove 901 on a spot welding tool;
step S203, placing a high-temperature soldering lug on the welding end of the radio-frequency coaxial core wire 5;
in step S204, one end of the "Ω" shaped interconnection line 6 is placed on the height Wen Hanpian, the protruding portion thereof is placed in the hollow ring 913 of the spot welding groove 901, and the other end is placed on the first supporting portion 911 of the spot welding groove 901.
In this embodiment, the process parameters of the resistance spot welding in step S3 are 3.2N spot welding pressure, 1.2V spot welding voltage, and 20ms spot welding time.
In the step S4, firstly, tin coating and cleaning treatment are carried out on the soldering surface of the soldering iron, and then soldering is carried out on the soldering iron; in the embodiment, the soldering temperature of the soldering iron is 270+/-5 ℃ and the soldering time is 1-2 s.
In the step of the soft connection process method, firstly, the high Wen Dianhan between one end of the omega-shaped interconnection connecting wire 6 and the radio frequency coaxial core wire 5 is firstly carried out, then the low-temperature soldering between the other end of the omega-shaped interconnection connecting wire 6 and the microstrip line 7 is realized, the problem that the conventional microstrip line spot welding is easy to cause ablation is solved, the welding temperature gradient at the two ends of the omega-shaped interconnection connecting wire 6 is pulled open, and the difficulty of the interconnection process is obviously reduced.
In summary, compared with the existing interconnection welding process, the radio frequency coaxial-microstrip soft connection process method and tool provided by the invention have the advantages that the rolled copper foil material with excellent anti-fatigue property is adopted as the material of the interconnection connecting wire, the material is molded into the required omega shape according to the microwave transmission performance requirement, the connection with the radio frequency coaxial core wire and the microstrip line is respectively realized by adopting the spot welding and soldering modes, the defect of direct soldering connection or gold band ring package connection in the prior art is effectively solved, and the interconnection reliability in the service process of the complex microwave assembly is ensured.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (10)
1. The flexible connection process method for the radio frequency coaxial-microstrip is characterized in that a radio frequency coaxial core wire (5) is fixedly connected with a microstrip line (7) through an omega-shaped interconnection connecting wire (6), and comprises the following steps of:
s1, preparing an omega-shaped interconnection connecting wire (6) by adopting a forming tool, and preparing a high-temperature soldering lug;
s2, placing an omega-shaped interconnection connecting wire (6), a high Wen Hanpian and a radio frequency coaxial core wire (5) in a spot welding area of a spot welding tool;
s3, connecting an omega-shaped interconnection connecting wire (6), a high Wen Hanpian and a radio frequency coaxial core wire (5) by adopting a resistance spot welding mode;
and S4, connecting one end of the omega-shaped interconnection connecting wire (6) which is not welded with the radio frequency coaxial core wire (5) with the microstrip line (7) in a soldering iron soldering mode.
2. The flexible connection process of the radio frequency coaxial rotary microstrip as claimed in claim 1, wherein the omega-shaped interconnection connection line (6) is made of rolled copper foil material, and the radius of the arc of the protruding part is 0.25-0.35 mm.
3. The flexible connection process method for the radio frequency coaxial rotary microstrip according to claim 2, wherein the preparation of the omega-shaped interconnection connection line (6) and the high-temperature soldering lug in the step S1 comprises the following steps:
s101, carrying out surface plating treatment and heat treatment on an omega-shaped interconnection connecting wire (6);
step S102, designing a forming tool of an omega-shaped interconnection connecting line (6) according to the requirement of forming size;
step S103, manufacturing a plurality of omega-shaped interconnection connecting lines (6) on the rolled copper foil material processed in the step S101 by adopting a forming tool designed in the step S102, and cutting the omega-shaped interconnection connecting lines (6) according to the distance between the radio frequency coaxial core wire (5) and the microstrip line (7);
step S104, preparing the height Wen Hanpian according to the size of the radio frequency coaxial core wire (5) and the spot welding area.
4. The soft connection process method for radio frequency coaxial rotary microstrip as claimed in claim 3, wherein the placing process in the step S2 specifically includes:
step S201, designing a spot welding tool according to the structure and the external dimension of the radio frequency coaxial connector (4);
step S202, placing the welding end of the radio frequency coaxial core wire (5) on a spot welding tool;
step S203, placing a high-temperature soldering lug on the welding end of the radio-frequency coaxial core wire (5);
step S204, placing one end of the omega-shaped interconnection line (6) on the height Wen Hanpian;
wherein the high-temperature soldering lug is a eutectic material, and the melting point of the high-temperature soldering lug is more than or equal to 280 ℃; the melting point of the soldering material used for soldering by the soldering iron is less than or equal to 183 ℃.
5. A method for flexible connection of rf coaxial rotary microstrip according to claim 3, wherein the forming tool in step S102 is used for pressing the strip-shaped rolled copper foil to form an "Ω" -shaped interconnection line (6), and the forming tool includes:
the upper pressing die (801) is provided with positioning blocks (812) at two ends of the bottom;
a plurality of raised blocks (811) arranged in an array between two positioning blocks (812);
a lower pressing die (802), wherein positioning grooves (822) are respectively formed at two ends of the top of the lower pressing die;
a plurality of grooves (821) which are the same as the number of the protruding blocks (811) and are arranged between the two positioning grooves (822) in an array;
the positioning blocks (812) and the positioning grooves (822) are in one-to-one correspondence, and the protruding blocks (811) and the grooves (821) are in one-to-one correspondence.
6. The flexible connection process of radio frequency coaxial rotary microstrip as claimed in claim 5, wherein said bump (811) is shaped as an "Ω" bump; the shape of the groove (821) is matched with the shape of the protruding block (811); the rolled copper foil is placed between an upper pressing die (801) and a lower pressing die (802), each protruding block (811) is clamped with each groove (821) in a one-to-one correspondence mode, and pressure is applied to the upper pressing die (801) to enable the rolled copper foil to form a plurality of omega-shaped interconnection connecting lines (6).
7. The flexible connection process of radio frequency coaxial rotary microstrip of claim 5 or 6, wherein said forming tool is made of brass material.
8. The flexible connection process method for rf coaxial-to-microstrip as claimed in claim 4, wherein the spot welding fixture in step S201 is used for welding the "Ω" shaped interconnection line (6) with the rf coaxial core (5) and the microstrip line (7), respectively, and the spot welding fixture includes:
the center of the supporting table (9) is a hollow structure, and the shape of the hollow structure is matched with the shape and the size of the radio frequency coaxial connector (4);
a plurality of spot welding grooves (901) which are respectively arranged at the edge of the inner ring of the supporting table (9);
the center of the radio frequency coaxial connector (4) is horizontally provided with the radio frequency coaxial core wire (5).
9. The flexible connection process of radio frequency coaxial rotary microstrip of claim 8, wherein said spot welding groove (901) comprises: a first support (911), a second support (912) and a hollow ring (913); the two supporting parts are rectangular groove bodies with the depth smaller than that of the hollow ring (913), and the first supporting part (911) and the second supporting part (912) are symmetrically connected to the two sides of the hollow ring (913);
the second supporting portion (912) is used for supporting the welding end of the radio frequency coaxial core wire (5), when the omega-shaped interconnection connecting wire (6) is placed in the spot welding groove (901), one end of the omega-shaped interconnection connecting wire (6) is placed on the corresponding first supporting portion (911), the other end of the omega-shaped interconnection connecting wire is in contact with the welding end of the radio frequency coaxial core wire (5) placed on the second supporting portion (912) and the high-temperature soldering lug, and the protruding portion of the welding end is located in the hollow ring (913).
10. The flexible connection process of rf coaxial rotary microstrip of claim 8 or 9, wherein the spot welding fixture is made of synthetic material.
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4790067A (en) * | 1987-06-05 | 1988-12-13 | Teradyne, Inc. | Connecting coaxial cable to connector |
| CN103296366B (en) * | 2013-05-24 | 2016-06-22 | 中国电子科技集团公司第四十一研究所 | A kind of coaxial-suspended coplanar waveguide switching device and micro strip soldering method |
| CN103633530B (en) * | 2013-12-02 | 2015-10-28 | 中国电子科技集团公司第四十一研究所 | A kind of interconnecting method for coaxial adatpter and printed board transmission line |
| WO2019104297A1 (en) * | 2017-11-27 | 2019-05-31 | Lewis Peter Houghton | Method of micro-coaxial wire bonding and corresponding apparatus |
| CN207637785U (en) * | 2017-12-29 | 2018-07-20 | 成都华芯微波技术有限公司 | Novel high-frequency microwave high power limiter welding assembly structure |
| CN109732275B (en) * | 2018-12-12 | 2020-04-24 | 陕西航天机电环境工程设计院有限责任公司 | Method for machining cylindrical sheet metal part with radial arc section |
| CN111283286A (en) * | 2020-03-09 | 2020-06-16 | 成都川美新技术股份有限公司 | Assembling method of two radio frequency connectors and electronic product |
| CN211889555U (en) * | 2020-03-24 | 2020-11-10 | 丹阳市盟威通讯器材有限公司 | Welding equipment is used in processing of radio frequency coaxial connector |
| CN111885850B (en) * | 2020-07-16 | 2022-01-28 | 上海无线电设备研究所 | Connecting and assembling method for F-shaped packaged power tube |
| CN112164949B (en) * | 2020-08-19 | 2022-08-26 | 山东航天电子技术研究所 | High-reliability assembling method for thin-wall through hole piece |
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