CN112072435A - Method for welding radio frequency cable of printed circuit board with radio frequency strip line - Google Patents
Method for welding radio frequency cable of printed circuit board with radio frequency strip line Download PDFInfo
- Publication number
- CN112072435A CN112072435A CN202010819021.1A CN202010819021A CN112072435A CN 112072435 A CN112072435 A CN 112072435A CN 202010819021 A CN202010819021 A CN 202010819021A CN 112072435 A CN112072435 A CN 112072435A
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- China
- Prior art keywords
- radio frequency
- groove
- circuit board
- printed circuit
- cable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
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- 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
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- 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/42—Plated through-holes or plated via connections
Abstract
The invention is suitable for the technical field of radio frequency connection, and provides a method for welding a radio frequency cable with a radio frequency strip line of a printed circuit board, which comprises the following steps: a groove for accommodating the radio frequency cable is formed in the printed circuit board; arranging Via holes on the periphery of the groove, plating metal on the Via holes and the side walls of the groove, wherein the Via holes are in line ground connection with the radio frequency band, and the side walls of the groove are in outer-layer ground connection with the inner layer and the outer layer of the printed circuit board; peeling the radio frequency cable to expose a core wire with a first preset length and a metal sheath with a second preset length; the stripped radio frequency cable is placed in the groove, the core wire is lapped on the radio frequency band wire of the printed circuit board, the metal sheath is welded with the groove, and the core wire is welded with the radio frequency band wire, so that the radio frequency cable and the printed circuit board are in a horizontal state, the horizontal transition from coaxial transmission of the cable to the radio frequency band wire of the printed circuit board is realized, and the transmission characteristic is improved.
Description
Technical Field
The invention belongs to the technical field of radio frequency connection, and particularly relates to a method for welding a radio frequency cable on a radio frequency strip line of a printed circuit board by a radio frequency cable.
Background
At present, two or more independent circuit units in a microwave component generally need radio frequency transmission, and radio frequency connectors are mostly adopted for hard connection or cable component connection at the frequency of more than 10GHz, so that the occupied space is large, and the cost is high. At present, a radio frequency cable can be adopted to directly weld a radio frequency strip line of a printed circuit board, the radio frequency cable and the printed circuit board form a certain included angle, the parasitic effect of a welding spot is large, and the radio frequency transmission characteristic cannot be met.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a method for welding a radio frequency cable to a radio frequency strip line of a printed circuit board, which aims to solve the problem in the prior art that the radio frequency cable and the printed circuit board form a certain included angle and the parasitic effect of a welding spot is large.
To achieve the above object, a first aspect of an embodiment of the present invention provides a method for welding a radio frequency strip line of a printed circuit board by a radio frequency cable, including:
a groove for accommodating the radio frequency cable is formed in the printed circuit board;
arranging Via holes on the periphery of the groove, plating metal on the Via holes and the side walls of the groove, wherein the Via holes are in line ground connection with the radio frequency band, and the side walls of the groove are in outer-layer ground connection with the printed circuit board;
peeling the radio frequency cable open to expose a core wire with a first preset length and a metal sheath with a second preset length, wherein the first preset length is greater than the preset distance, and the second preset length is greater than the length of the groove;
and placing the stripped radio frequency cable in the groove, overlapping the core wire on the radio frequency band wire of the printed circuit board, welding the metal sheath with the groove, and welding the core wire with the radio frequency band wire.
As another embodiment of the present application, the width of the groove is greater than or equal to the diameter of the metal sheath in the rf cable.
As another embodiment of the present application, the width of the groove is 0mm to 0.5mm larger than the diameter of the metal sheath in the RF cable.
As another embodiment of the present application, the length of the groove is any multiple of 2 times larger than the diameter of the metal sheath in the rf cable.
As another embodiment of the present application, a depth of the groove is greater than or equal to a radius of a metal sheath in the radio frequency cable.
As another embodiment of the present application, the preset distance is 0.1 mm.
As another embodiment of the present application, the first predetermined length is any multiple of more than 1 times the diameter of the core wire.
As another embodiment of the present application, when the transmission bandwidth of the radio frequency cable is greater than 20GHz, the length of the insulating medium between the core wire and the metal sheath is 0 mm;
when the transmission bandwidth of the radio frequency cable is not more than 20GHz, the length of the insulating medium between the core wire and the metal sheath is more than or equal to 0 mm.
As another embodiment of the present application, when the core wire is lapped on the radio frequency band wire of the printed circuit board, the end surface of the stripped radio frequency cable is placed in contact with the radio frequency band wire, and the core wire is not short-circuited.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: compared with the prior art, the groove is formed in the printed circuit board, the side wall of the groove is metalized and respectively connected with the inner layer ground and the outer layer ground of the printed circuit board, the radio frequency cable is embedded in the groove of the printed circuit board and welded, the radio frequency cable and the printed circuit board are in a horizontal state, the horizontal transition of coaxial transmission of the cable to a radio frequency strip line of the printed circuit board is realized, the parasitic effect of the radio frequency cable welded to the radio frequency strip line of the printed circuit board is reduced, the impedance line which is not 50 ohms between the end face of the radio frequency cable and the radio frequency strip line of the printed circuit board is shortened to 0.2mm, the transmission characteristic is improved to 40GHz, and the transmission characteristic of the radio frequency cable welded to the radio frequency strip line of. And the radio frequency connector adopted by radio frequency transmission of two or more independent circuit units in the microwave assembly is omitted, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the embodiments or drawings used in the prior art description, and obviously, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of an implementation of a method for welding an rf strip line of a printed circuit board by an rf cable according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a groove formed in a printed circuit board according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a radio frequency cable provided by an embodiment of the present invention;
fig. 4(1) is a diagram illustrating an end surface of an rf cable and a position of the rf strip line according to an embodiment of the present invention;
FIG. 4(2) is an exemplary diagram of a core wire solder joint provided in an embodiment of the present invention; .
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of an implementation of a method for soldering a radio frequency strip line of a printed circuit board by using a radio frequency cable according to an embodiment of the present invention, which is described in detail below.
Optionally, the distance between the groove and the radio frequency strip line of the printed circuit board is a preset distance, the preset distance is greater than or equal to 0, that is, it is only necessary to ensure that the core line in the radio frequency cable is not short-circuited. Optionally, the preset distance may be 0.1mm, that is, the distance between the end of the groove closest to the radio frequency strip line and the radio frequency strip line is 0.1mm, so that the distance between the groove and the radio frequency strip line is as small as possible, the groove is not in contact with the radio frequency strip line, and it is ensured that the core wire in the radio frequency cable is not short-circuited.
As shown in fig. 2, which is a schematic view of a groove formed in the printed circuit board. The radio frequency strip line is arranged at one end of the printed circuit board, and the radio frequency strip line is arranged in the middle of the printed circuit board for facilitating welding operation.
Optionally, the width of the groove is greater than or equal to the diameter of the metal sheath in the radio frequency cable, so that the radio frequency cable can be completely placed in the groove, and subsequent welding operation is facilitated.
Optionally, the width of the groove is 0mm to 0.5mm larger than the diameter of the metal sheath in the radio frequency cable. Optionally, when the width of the groove is 0.15 mm-0.3 mm larger than the diameter of the metal sheath in the radio frequency cable, the radio frequency cable is more stable when placed in the groove for welding, and the welding is firmer. Since the insulating outer layer of the radio frequency cable needs to be stripped, the width value of the groove is only 0 mm-0.5 mm larger than the diameter of the metal sheath in the radio frequency cable. For example, the width of the groove is 0.15mm larger than the diameter of the metal sheath in the radio frequency cable, the width of the groove is 0.3mm larger than the diameter of the metal sheath in the radio frequency cable, the width of the groove is 0.2mm larger than the diameter of the metal sheath in the radio frequency cable, and the like.
Optionally, when welding the rf cable, the exposed metal sheath of the rf cable needs to be completely disposed in the groove, so the length of the groove is selected to facilitate welding. Optionally, the length of the groove is greater than any of 2 times of the diameter of the metal sheath in the radio frequency cable. Optionally, when the length of the groove is larger than any multiple of 5-8 times of the diameter of the metal sheath in the radio frequency cable, the radio frequency cable is placed in the groove, and the welding effect is better. For example, the length of the groove is 5 times the diameter of the metal sheath in the radio frequency cable, the length of the groove is 8 times the diameter of the metal sheath in the radio frequency cable, the length of the groove is 6 times the diameter of the metal sheath in the radio frequency cable, and so on.
Optionally, the depth of the groove is greater than or equal to the radius of the metal sheath in the radio frequency cable. For convenient operation, the depth of the groove can be directly set to be the same as the thickness of the printed circuit board when the groove is formed, namely, a through hole is formed in the printed circuit board, and the length and the width of the through hole are the same as those of the groove.
And 102, forming Via holes on the periphery of the groove, plating metal on the Via holes and the side walls of the groove, connecting the Via holes with the radio frequency band in a linear mode, and connecting the side walls of the groove with the inner layer and the outer layer of the printed circuit board in an outer layer mode.
Optionally, the Via hole in this embodiment is a ground hole. The metal plated in the Via holes and on the side walls of the grooves can be copper, so that the ground near the grooves is well contacted with the ground of the radio frequency band lines through the Via holes, the metallization of the side walls of the grooves is connected with the ground of the inner layer and the outer layer of the printed board and is not connected with the radio frequency band lines of the printed board, and the continuity of the microwave ground is guaranteed.
Optionally, the number of Via holes may be multiple, and as shown in fig. 2, a plurality of Via holes are disposed around the groove and on both sides of the radio frequency band line.
Alternatively, a schematic view of the radio frequency cable shown in fig. 3. The radio frequency cable can comprise a core wire, an insulating medium layer, a metal sheath and an insulating sheath from inside to outside, or the radio frequency cable can comprise the core wire, the insulating medium layer and the metal sheath from inside to outside, but does not comprise the outermost insulating sheath.
For subsequent welding convenience, the radio frequency cable is stripped, so that the core wire is exposed to a first preset length, and the first preset length is any multiple of 1 time of the diameter of the core wire. Optionally, when the first preset length is any multiple of 2.5-4 times of the diameter of the core wire, the radio frequency cable is more convenient to weld with the radio frequency strip wire of the printed circuit board, and the welding effect is better. For example, the first predetermined length is 2.5 times the diameter of the core wire, the first predetermined length is 3 times the diameter of the core wire, the first predetermined length is 4 times the diameter of the core wire, etc.
The length L of the exposed insulating medium is set according to the transmission bandwidth of the insulating medium, and when the transmission bandwidth of the radio frequency cable is greater than 20GHz, the length of the insulating medium between the core wire and the metal sheath is 0 mm; when the transmission bandwidth of the radio frequency cable is not more than 20GHz, the length of the insulating medium between the core wire and the metal sheath is more than or equal to 0 mm. Optionally, when the transmission bandwidth of the radio frequency cable is not greater than 20GHz, the length of the insulating medium between the core wire and the metal sheath is 0.2 mm.
Optionally, the radio frequency cable may be wrapped with or not wrapped with an insulating sheath, and when the radio frequency cable is wrapped with the insulating sheath, the second preset length is greater than 2 times the diameter of the metal sheath, that is, the length of the exposed metal sheath is greater than the length of the groove in the printed circuit board, so as to ensure that the outermost layer of the radio frequency cable in the groove is the metal sheath.
When the radio frequency cable is not wrapped by the insulating sheath, the length of the radio frequency cable is larger than that of the groove, namely the second preset length is any value larger than that of the groove.
And 104, placing the stripped radio frequency cable in the groove, overlapping the core wire on the radio frequency band wire of the printed circuit board, welding the metal sheath with the groove, and welding the core wire with the radio frequency band wire.
Optionally, as shown in fig. 4(1) and 4(2), when the core wire is lapped on the radio frequency strip line of the printed circuit board, the end surface of the stripped radio frequency cable is closely attached to the radio frequency strip line, and the core wire is not short-circuited, at this time, signal transmission from the radio frequency cable to the radio frequency strip line of the printed circuit board is in horizontal transition, so that a parasitic effect of the radio frequency cable soldered to the radio frequency strip line of the printed circuit board is reduced, and a transmission characteristic of the radio frequency cable soldered to the radio frequency strip line of the printed circuit board is improved. When the cable is welded, the solder flows to the bottom of the groove through the gap between the metal sheath and the groove, so that the bottom of the groove can be welded, and the welding is firmer.
It should be noted that the core wire solder joint is as small as possible while meeting the solder joint requirement. Such as the core wire solder joint shown in fig. 4 (2).
According to the method for welding the radio frequency strip line of the printed circuit board by the radio frequency cable, the groove is formed in the printed circuit board, the side wall of the groove is metalized and respectively connected with the inner layer ground and the outer layer ground of the printed circuit board, the radio frequency cable is embedded in the groove of the printed circuit board to be welded, the radio frequency cable and the printed circuit board are in a horizontal state, the horizontal transition from coaxial transmission of the cable to the radio frequency strip line of the printed circuit board is realized, the parasitic effect of welding the radio frequency cable to the radio frequency strip line of the printed circuit board is reduced, the impedance line between the end face of the radio frequency cable and the radio frequency strip line of the printed circuit board is shortened to 0.2mm, the transmission characteristic is improved to 40GHz, and the transmission characteristic of welding the radio frequency cable to. And radio frequency connectors adopted by radio frequency transmission of two or more independent circuit units in the microwave assembly are omitted, and the cost is reduced.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the present invention, and are intended to be included within the scope thereof.
Claims (9)
1. A method of radio frequency cable soldering a radio frequency strip line of a printed circuit board, comprising:
a groove for accommodating the radio frequency cable is formed in the printed circuit board;
arranging Via holes on the periphery of the groove, plating metal on the Via holes and the side walls of the groove, wherein the Via holes are in line ground connection with the radio frequency band, and the side walls of the groove are in outer-layer ground connection with the printed circuit board;
peeling the radio frequency cable open to expose a core wire with a first preset length and a metal sheath with a second preset length, wherein the first preset length is greater than the preset distance, and the second preset length is greater than the length of the groove;
and placing the stripped radio frequency cable in the groove, overlapping the core wire on the radio frequency band wire of the printed circuit board, welding the metal sheath with the groove, and welding the core wire with the radio frequency band wire.
2. The method of claim 1, wherein the groove has a width that is greater than or equal to a diameter of a metal sheath of the rf cable.
3. The method for welding a radio frequency strip line of a printed circuit board for a radio frequency cable according to claim 2, wherein the groove has a width value 0mm to 0.5mm larger than a diameter of a metal sheath in the radio frequency cable.
4. The method of claim 1, wherein the length of the groove is any of more than 2 times the diameter of the metal sheath in the radio frequency cable.
5. The method of claim 1, wherein the depth of the groove is greater than or equal to the radius of the metal skin in the rf cable.
6. The method for rf cable soldering of an rf strap of a printed circuit board according to claim 1, wherein the predetermined distance is 0.1 mm.
7. The method of radio frequency cable soldering a radio frequency strip line of a printed circuit board according to claim 1, wherein the first predetermined length is any number of times greater than 1 times the diameter of the core line.
8. The method for welding a radio frequency strip line of a printed circuit board by a radio frequency cable according to claim 1 or 7, wherein the length of an insulating medium between the core wire and the metal sheath is 0mm when the transmission bandwidth of the radio frequency cable is greater than 20 GHz;
when the transmission bandwidth of the radio frequency cable is not more than 20GHz, the length of the insulating medium between the core wire and the metal sheath is more than or equal to 0 mm.
9. The method for soldering a radio frequency band wire of a printed circuit board as claimed in claim 1, wherein when the core wire is lapped over the radio frequency band wire of the printed circuit board, an end surface of the peeled radio frequency cable is placed in abutment with the radio frequency band wire without short-circuiting the core wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010819021.1A CN112072435B (en) | 2020-08-14 | 2020-08-14 | Method for welding radio frequency cable of printed circuit board with radio frequency strip line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010819021.1A CN112072435B (en) | 2020-08-14 | 2020-08-14 | Method for welding radio frequency cable of printed circuit board with radio frequency strip line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112072435A true CN112072435A (en) | 2020-12-11 |
| CN112072435B CN112072435B (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010819021.1A Active CN112072435B (en) | 2020-08-14 | 2020-08-14 | Method for welding radio frequency cable of printed circuit board with radio frequency strip line |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06104548A (en) * | 1992-09-18 | 1994-04-15 | Fujitsu Ltd | Joint structure of coaxial cable |
| US20010042907A1 (en) * | 2000-05-09 | 2001-11-22 | Nec Corporation | Radio frequency circuit module on multi-layer substrate |
| CN1334624A (en) * | 2000-05-26 | 2002-02-06 | 松下电工株式会社 | HF signal conversion apparatus |
| DE102004060416B4 (en) * | 2004-12-14 | 2007-06-14 | Endress + Hauser Flowtec Ag | Method for fixing a coaxial cable to a printed circuit board and corresponding printed circuit board |
| US20090151993A1 (en) * | 2007-12-13 | 2009-06-18 | Roya Yaghmai | Shielded cable interface module and method of fabrication |
| CN206098713U (en) * | 2016-10-26 | 2017-04-12 | 成都锐芯盛通电子科技有限公司 | Wide scan angle high -gain microstrip antenna and array antenna who constitutes thereof |
| CN109478732A (en) * | 2016-07-08 | 2019-03-15 | 赫希曼汽车通讯有限公司 | For cable of the coaxial cable assembly on thick circuit board to be assembled |
| CN110545614A (en) * | 2018-05-29 | 2019-12-06 | 上海华为技术有限公司 | Printed circuit board transmission belt line and electronic equipment |
-
2020
- 2020-08-14 CN CN202010819021.1A patent/CN112072435B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06104548A (en) * | 1992-09-18 | 1994-04-15 | Fujitsu Ltd | Joint structure of coaxial cable |
| US20010042907A1 (en) * | 2000-05-09 | 2001-11-22 | Nec Corporation | Radio frequency circuit module on multi-layer substrate |
| CN1334624A (en) * | 2000-05-26 | 2002-02-06 | 松下电工株式会社 | HF signal conversion apparatus |
| DE102004060416B4 (en) * | 2004-12-14 | 2007-06-14 | Endress + Hauser Flowtec Ag | Method for fixing a coaxial cable to a printed circuit board and corresponding printed circuit board |
| US20090151993A1 (en) * | 2007-12-13 | 2009-06-18 | Roya Yaghmai | Shielded cable interface module and method of fabrication |
| CN109478732A (en) * | 2016-07-08 | 2019-03-15 | 赫希曼汽车通讯有限公司 | For cable of the coaxial cable assembly on thick circuit board to be assembled |
| CN206098713U (en) * | 2016-10-26 | 2017-04-12 | 成都锐芯盛通电子科技有限公司 | Wide scan angle high -gain microstrip antenna and array antenna who constitutes thereof |
| CN110545614A (en) * | 2018-05-29 | 2019-12-06 | 上海华为技术有限公司 | Printed circuit board transmission belt line and electronic equipment |
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| Publication number | Publication date |
|---|---|
| CN112072435B (en) | 2022-04-01 |
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