Bluetooth coupling calibration test fixture and calibration equipment

Abstract

The utility model relates to the technical field of Bluetooth coupling calibration, and provides a Bluetooth coupling calibration test fixture and calibration equipment, the Bluetooth coupling calibration test fixture comprises a fixture main body, a plurality of metal shielding cavities are formed in the fixture main body, and the structures of the metal shielding cavities are the same; one end of the metal shielding cavity penetrates through the jig main body and is communicated with the outside; the jig main body is used for abutting against the circuit board, so that the plurality of product units are respectively accommodated in the corresponding metal shielding cavities; according to the Bluetooth coupling calibration test fixture provided by the embodiment of the invention, the configuration of each metal shielding cavity is the same, so that the air attenuation consistency in each metal shielding cavity can be ensured, the influence of radio frequency crosstalk among a plurality of product units can be effectively reduced, and the accuracy of calibration detection data can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of Bluetooth coupling calibration, and in particular provides a Bluetooth coupling calibration test fixture and a calibration device. Background Art

[0002] When Bluetooth products leave the factory, they need to be subjected to coupling calibration tests to improve the factory pass rate. In actual operation, in order to facilitate operation and optimize costs, multiple independent product units are usually integrated onto a circuit board for patching, and multiple independent products are separated into boards when the product shell is installed.

[0003] However, when a coupling plate is used to calibrate and test the circuit board with multiple independent product units attached, no matter where the coupling plate is placed above the circuit board, it is impossible to ensure that the distance from the coupling plate to each independent product unit is consistent, that is, it is impossible to ensure that the air attenuation from the coupling plate to each independent product unit to be tested is consistent. This causes the coupling board instrument to have differences when analyzing the power of each independent product unit, which will seriously affect the calibration consistency of the product and even cause errors in the test data. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a Bluetooth coupling calibration test fixture and a calibration device, which is intended to solve the problem that data deviation may occur when the related technology performs calibration and detection on multiple independent products on the same circuit board.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0006] In the first aspect, an embodiment of the present application provides a Bluetooth coupling calibration test jig for accommodating multiple product units on a circuit board. The Bluetooth coupling calibration test jig includes a jig body, and a plurality of metal shielding cavities are formed inside the jig body, and the configuration of each metal shielding cavity is the same; one end of the metal shielding cavity is passed through the jig body and connected to the outside; the jig body is used to abut against the circuit board so that the multiple product units are respectively accommodated in the corresponding metal shielding cavities.

[0007] Beneficial effects of the embodiments of the present application: The Bluetooth coupling calibration test fixture provided in the embodiments of the present application, by abutting the fixture body against the circuit board, allows multiple product units on the circuit board to be respectively accommodated in each metal shielding cavity. At the same time, the configurations of each metal shielding cavity are the same, thereby ensuring the consistency of air attenuation in each metal shielding cavity, and can also effectively reduce the impact of RF crosstalk between multiple product units, thereby effectively improving the accuracy of calibration test data.

[0008] In some embodiments, the fixture body includes a metal shielding cover and a metal shielding shell, a plurality of metal shielding grids are formed on the metal shielding shell, and a plurality of metal shielding grooves are formed on the metal shielding cover; the metal shielding cover is sealed on one end of the metal shielding shell so that the metal shielding grid and the corresponding metal shielding groove are combined to form a metal shielding cavity.

[0009] In some embodiments, the Bluetooth coupling calibration test fixture also includes an antenna coupling board, which includes a substrate and a plurality of antenna coupling units arranged on the substrate; the substrate is clamped between the metal shielding cover and the metal shielding shell so that the antenna coupling units are respectively accommodated in the corresponding metal shielding grids and metal shielding grooves.

[0010] In some embodiments, the substrate has a first surface and an opposite second surface; the antenna coupling unit includes a first dielectric substrate, a second dielectric substrate, a radio frequency connector, a feeding branch, and a coupling antenna, the first dielectric substrate and the feeding branch are arranged on the first surface, the second dielectric substrate is arranged on the second surface, and the coupling antenna is arranged on the second dielectric substrate; in the thickness direction of the substrate, the coupling antenna overlaps with at least a portion of the feeding branch;

[0011] The RF connector is arranged on the first surface, the inner core of the RF connector is electrically connected to the feeding branch, the outer core of the RF connector is passed through the substrate and is electrically connected to the first dielectric substrate and the second dielectric substrate; a first through hole is opened on the metal shielding cover, and part of the RF connector is used to pass through the first through hole.

[0012] In some embodiments, the antenna coupling unit further includes an optical coupling probe, and the metal shielding cover is further provided with a second through hole, and the second through hole is used for passing the optical coupling probe.

[0013] In some embodiments, there is a gap between the first dielectric substrates of adjacent antenna coupling units; the slot end of the metal shielding slot abuts against the substrate at the gap.

[0014] In some embodiments, a partition structure is also provided in the metal shielding groove, and the partition structure is configured to separate the metal shielding groove into a first groove body and a second groove body; in the thickness direction of the substrate, the coupling antenna is located within the range of the first groove body, and the RF connector and the optical coupling probe are located within the range of the second groove body.

[0015] In some embodiments, an avoidance groove is provided on the partition structure, and the feeding branch is configured to be able to pass through the avoidance groove.

[0016] In some embodiments, the metal shielding shell includes an enclosure, at least one first partition plate distributed in sequence along a first direction within the enclosure, and at least one second partition plate distributed in sequence along a second direction within the enclosure; the first partition plate and the second partition plate divide the enclosure into multiple metal shielding grids; wherein the first direction intersects with the second direction.

[0017] In a second aspect, an embodiment of the present application further provides a calibration device, including the Bluetooth coupling calibration test fixture as described above.

[0018] Beneficial effects of the embodiments of the present application: The calibration equipment provided by the embodiments of the present application includes the above-mentioned Bluetooth coupling calibration test fixture. On the basis that the above-mentioned Bluetooth coupling calibration test fixture can effectively improve the accuracy of calibration test data, the calibration equipment has higher accuracy in product calibration and testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a Bluetooth coupling calibration test fixture provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of the Bluetooth coupling calibration test fixture provided in an embodiment of the present application from another perspective;

[0022] Figure 3 A schematic diagram of the structure of a metal shielding shell provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a metal shielding cover provided in an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of an antenna coupling plate provided in an embodiment of the present application;

[0025] Figure 6 A schematic structural diagram of an antenna coupling plate from another perspective provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of the positions of the coupling antenna and the feeding branch of the antenna coupling plate provided in an embodiment of the present application in the thickness direction of the substrate.

[0027] Among them, the reference numerals in the figure are:

[0028] 1000. Bluetooth coupling calibration test fixture;

[0029] 100. fixture body; 110. metal shielding cavity;

[0030] 10. Metal shielding cover; 101. Metal shielding slot; 101a. First slot body; 101b. Second slot body; 102. First through hole; 103. Second through hole; 11. Separation structure; 111. Avoidance slot;

[0031] 20. Metal shielding shell; 201. Metal shielding grid; 21. Enclosure; 22. First partition plate; 23. Second partition plate;

[0032] 30. Antenna coupling plate; 31. Base material; 311. First surface; 312. Second surface; 32. Antenna coupling unit; 321. First dielectric substrate; 322. Second dielectric substrate; 323. RF connector; 324. Feed branch; 325. Coupling antenna; 33. Optical coupling probe;

[0033] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0034] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Before Bluetooth products leave the factory, they need to be subjected to coupling calibration tests to improve the factory pass rate. In actual operation, in order to facilitate operation and optimize costs, multiple independent product units are usually integrated onto a circuit board for patching, and multiple independent products are separated into boards when the product shell is installed. However, when a coupling board is used to calibrate and test the circuit board with multiple independent product units, no matter where the coupling board is placed on the circuit board, it is impossible to ensure that the distance from the coupling board to each independent product unit is consistent, that is, it is impossible to ensure that the air attenuation from the coupling board to each independent product unit to be tested is consistent. This causes the coupling board instrument to have differences when analyzing the power of each independent product unit, which will seriously affect the calibration consistency of the product and even cause errors in the test data.

[0039] Based on the above considerations, in order to solve the problem that data may deviate when the relevant technology performs calibration and detection on multiple independent products on the same circuit board, a Bluetooth coupling calibration test fixture is designed. By abutting the fixture body against the circuit board, multiple product units on the circuit board can be respectively accommodated in each metal shielding cavity. At the same time, the configuration of each metal shielding cavity is the same, so the consistency of air attenuation in each metal shielding cavity can be ensured, and the influence of RF crosstalk between multiple product units can be effectively reduced, thereby effectively improving the accuracy of the calibration detection data.

[0040] Below, the Bluetooth coupling calibration test fixture provided in the embodiment of the present application will be introduced in detail according to the specific implementation method.

[0041] Please refer to Figures 1 to 7 In the first aspect, the embodiment of the present application provides a Bluetooth coupling calibration test fixture 1000 for accommodating multiple product units on a circuit board. The Bluetooth coupling calibration test fixture 1000 includes a fixture body 100, and a plurality of metal shielding cavities 110 are formed inside the fixture body 100. The configuration of each metal shielding cavity 110 is the same; one end of the metal shielding cavity 110 is penetrated through the fixture body 100 and connected to the outside; the fixture body 100 is used to abut against the circuit board so that the multiple product units are respectively accommodated in the corresponding metal shielding cavities 110.

[0042] One end of the metal shielding cavity 110 passes through the fixture body 100 and is connected to the outside, that is, the metal shielding cavity 110 can be connected to the outside, and multiple product units on the circuit board can be respectively inserted into the corresponding metal shielding cavity 110.

[0043] The fixture body 100 is used to abut against the circuit board so that multiple product units are respectively accommodated in the corresponding metal shielding cavities 110, so that the multiple product units can be shielded from each other, and the probability of interference between the multiple product units is low.

[0044] The fixture body 100 may be a structural member made of metal, and thus the metal shielding cavity 110 formed on the fixture body 100 has a shielding effect. Alternatively, the fixture body 100 may be only partially made of metal, that is, the portion forming the metal shielding cavity 110 is made of metal. Optionally, the fixture body 100 may be, but is not limited to, a rectangular block structure, a circular block structure, a spherical structure, etc.

[0045] The configurations of the metal shielding cavities 110 are the same, that is, the size, depth, and cavity shape of the metal shielding cavities 110 are the same. For example, the metal shielding cavities 110 can be rectangular cavities with the same shape and size; or, the metal shielding cavities 110 can be circular cavities with the same shape and size. By setting the metal shielding cavities 110 to have the same configuration, the air attenuation of the metal shielding cavities 110 can be kept consistent, thereby effectively improving the accuracy of the calibration detection process.

[0046] It can be understood that the above-mentioned product unit refers to the components to be calibrated and tested; illustratively, the product unit can be a Bluetooth module, etc.

[0047] The Bluetooth coupling calibration test fixture 1000 provided in the embodiment of the present application, by abutting the fixture body 100 against the circuit board, multiple product units on the circuit board can be respectively accommodated in each metal shielding cavity 110. At the same time, the configuration of each metal shielding cavity 110 is the same, thereby ensuring the consistency of air attenuation in each metal shielding cavity 110, and effectively reducing the impact of RF crosstalk between multiple product units, thereby effectively improving the accuracy of calibration detection data.

[0048] Please refer to Figures 1 to 7 In some embodiments, the fixture body 100 includes a metal shielding cover 10 and a metal shielding shell 20, a plurality of metal shielding grids 201 are formed on the metal shielding shell 20, and a plurality of metal shielding grooves 101 are formed on the metal shielding cover 10; the metal shielding cover 10 is sealed at one end of the metal shielding grid 201, and the metal shielding grid 201 and the corresponding metal shielding groove 101 are combined to form a metal shielding cavity 110.

[0049] The metal shielding shell 20 is formed with a plurality of metal shielding grids 201 which are arranged through the metal shielding shell 20; optionally, the metal shielding grid 201 may be, but is not limited to, a circular shielding grid, a square shielding grid, a rectangular shielding grid or a polygonal shielding grid, etc. The plurality of metal shielding grids 201 may be arranged in an array.

[0050] One end of the metal shielding grid 201 is used to cover the metal shielding cover 10 , and the other end of the metal shielding grid 201 is connected to the outside and is used for inserting the product unit.

[0051] A plurality of metal shielding grooves 101 are formed on the metal shielding cover 10; optionally, the metal shielding grooves 101 may be but are not limited to a circular groove body, a square groove body, a rectangular groove body or a polygonal groove body, etc.; the metal shielding grooves 101 may be arranged corresponding to the metal shielding grid 201, thereby, when the metal shielding cover 10 is sealed on one end of the metal shielding shell 20, each metal shielding groove 101 is respectively aligned with the corresponding metal shielding grid 201 and combined to form a metal shielding cavity 110.

[0052] With such a configuration, the metal shielding cover 10 can be sealed on the metal shielding shell 20 , or the metal shielding cover 10 can be removed from the metal shielding shell 20 , so as to facilitate the assembly of the fixture body 100 and thus facilitate the calibration operation process.

[0053] Please refer to Figures 1 to 7 In some embodiments, the Bluetooth coupling calibration test fixture 1000 also includes an antenna coupling board 30, which includes a substrate 31 and a plurality of antenna coupling units 32 disposed on the substrate 31; the substrate 31 is sandwiched between the metal shielding cover 10 and the metal shielding shell 20, so that the antenna coupling units 32 are respectively accommodated in the corresponding metal shielding grid 201 and the metal shielding groove 101.

[0054] The antenna coupling plate 30 senses the power of the product unit through air coupling to achieve calibration detection.

[0055] The antenna coupling plate 30 includes a substrate 31 and an antenna coupling unit 32. The substrate 31 may be made of a glass fiber reinforced epoxy resin composite material, and the substrate 31 has good insulation performance, mechanical strength and heat resistance. The antenna coupling unit 32 is used to radiate or receive signals to achieve the purpose of sensing the power of the product unit.

[0056] In this way, by setting up the antenna coupling plate 30 and accommodating each antenna coupling unit 32 in the corresponding metal shielding grid 201 and the metal shielding groove 101, calibration detection of the product unit inserted in the metal shielding groove 101 can be achieved, thereby effectively improving the accuracy of detection.

[0057] Please refer to Figures 1 to 7 In some embodiments, the substrate 31 has a first surface 311 and an opposite second surface 312; the antenna coupling unit 32 includes a first dielectric substrate 321, a second dielectric substrate 322, a radio frequency connector 323, a feeding branch 324 and a coupling antenna 325, the first dielectric substrate 321 and the feeding branch 324 are arranged on the first surface 311, the second dielectric substrate 322 is arranged on the second surface 312, and the coupling antenna 325 is arranged on the second dielectric substrate 322; in the thickness direction of the substrate, the coupling antenna 325 overlaps with at least part of the feeding branch 324; the radio frequency connector 323 is arranged on the first surface 311, the inner core of the radio frequency connector 323 is electrically connected to the feeding branch 324, and the outer core of the radio frequency connector 323 is penetrated through the substrate and electrically connected to the first dielectric substrate 321 and the second dielectric substrate 322; the metal shielding cover 10 is provided with a first through hole 102, and a part of the radio frequency connector 323 is used to be penetrated through the first through hole 102.

[0058] The first surface 311 and the second surface 312 refer to opposite side end surfaces of the substrate 31 .

[0059] The first dielectric substrate 321 is a metal plate with conductive properties, for example, a copper-clad plate, etc. The first dielectric substrate 321 can be, but is not limited to, a rectangular substrate, a circular substrate, or a plate structure of other shapes.

[0060] The second dielectric substrate 322 is a metal plate with conductive properties, for example, a copper-clad plate, etc. The second dielectric substrate 322 can be, but is not limited to, a rectangular substrate, a circular substrate, or a plate structure of other shapes.

[0061] The feeding branch 324 is disposed on the first surface 311, and is used to connect to the inner core of the RF connector 323. In some implementations, the feeding branch 324 may be a T-type probe.

[0062] In some implementations, the coupling antenna 325 may be formed into a bow-shaped structure.

[0063] The coupling antenna 325 is arranged on the second dielectric substrate 322. At the same time, the outer core of the RF connector 323 is passed through the substrate and is electrically connected to the first dielectric substrate 321 and the second dielectric substrate 322. Therefore, the electromagnetic waves input from the outside can be transmitted to the feeding branch 324 through the inner core of the RF connector 323, and can also be transmitted to the coupling antenna 325 through the outer core of the RF connector 323 via the first dielectric substrate 321 and the second dielectric substrate 322, and finally radiated outward through the feeding branch 324 and the coupling antenna 325.

[0064] It can be understood that each antenna coupling unit 32 can perform calibration and detection on the product unit in the metal shielding cavity 110 through the above principle.

[0065] The metal shielding cover 10 is also provided with a first through hole 102 , so that one end of the RF connector 323 can pass through the first through hole 102 to the outside and connect with an external device to input or output signals.

[0066] Please refer to Figures 1 to 7 In some embodiments, the antenna coupling unit 32 further includes an optical coupling probe 33 , and the metal shielding cover 10 further includes a second through hole 103 , and the second through hole 103 is used for the optical coupling probe 33 to pass through.

[0067] It can be understood that by providing the optical coupling probe 33 , the LED lamp of the product unit can also be tested.

[0068] By opening the second through hole 103 on the metal shielding cover 10 , one end of the optical coupling probe 33 can pass through the second through hole 103 and extend to the outside, so as to be connected to an external device and perform a test.

[0069] Please refer to Figures 1 to 7 In some embodiments, there is a gap between the first dielectric substrates 321 of adjacent antenna coupling units 32; the slot end of the metal shielding slot 101 abuts against the substrate 31 at the gap.

[0070] It can be understood that when the slot end of the metal shielding slot 101 abuts against the gap between the substrate 31, the first dielectric substrate 321 and the RF connector 323 of each antenna coupling unit 32 will be inserted into the corresponding metal shielding slot 101; thus, the probability of mutual interference between different antenna coupling units 32 is low.

[0071] Please refer to Figures 1 to 7 In some embodiments, a partition structure 11 is further provided in the metal shielding groove 101, and the partition structure 11 is configured to separate the metal shielding groove 101 into a first groove body 101a and a second groove body 101b; in the thickness direction of the substrate 31, the coupling antenna 325 is located within the range of the first groove body 101a, and the RF connector 323 and the optical coupling probe 33 are located within the range of the second groove body 101b.

[0072] It can be understood that the separation structure 11 separates the metal shielding slot 101 into a first slot body 101a and a second slot body 101b; when the slot end of the metal shielding slot 101 abuts against the surface of the substrate 31, the RF connector 323 and the optical coupling probe 33 can be located in the second slot body 101b; and the feeding branch 324 can be routed from the second slot body 101b to the first slot body 101a, and the coupling antenna 325 on the side of the second surface 312 in the first slot body 101a radiates signals outward. Thus, the separation structure 11 can separate the RF connector 323 and the optical coupling probe 33 from the coupling antenna 325, thereby reducing the impact of the RF connector 323 and the optical coupling probe 33 on the coupling antenna 325, so as to further improve the accuracy of calibration detection.

[0073] Please refer to Figures 1 to 7 In some embodiments, a avoidance groove 111 is opened on the partition structure 11 , and the feeding branch 324 is configured to be able to pass through the avoidance groove 111 .

[0074] It can be understood that the partition structure 11 is recessed at one end toward the substrate 31 to form an avoidance groove 111. Thus, when the slot end of the metal shielding groove 101 abuts against the surface of the substrate 31, the avoidance groove 111 formed on the partition structure 11 can be used for wiring of the feeding branch 324 to reduce the influence of the partition structure 11 on the routing of the feeding branch 324.

[0075] Please refer to Figures 1 to 7 In some embodiments, the metal shielding shell 20 includes a surrounding plate 21, at least one first partition plate 22 sequentially distributed in the surrounding plate 21 at intervals along a first direction X, and at least one second partition plate 23 sequentially distributed in the surrounding plate 21 at intervals along a second direction Y; the first partition plate 22 and the second partition plate 23 divide the surrounding plate 21 into a plurality of metal shielding grids 201; wherein the first direction X intersects with the second direction Y.

[0076] The enclosure 21 refers to the structure of the outermost circle of the metal shielding shell 20. Optionally, the enclosure 21 can enclose a rectangular area, a circular area, etc. In some embodiments, the enclosure 21 can include two oppositely disposed first side panels and two oppositely disposed second side panels, and the two second side panels are respectively connected end to end to the two ends of the two first side panels, thereby enclosing a rectangular structure.

[0077] Optionally, the first direction X may be any direction, for example, the length direction of the enclosure 21, the width direction of the enclosure 21, etc. The second direction Y may be any direction, for example, the length direction of the enclosure 21, the width direction of the enclosure 21, etc. In some embodiments, the first direction X may be perpendicular to the second direction Y.

[0078] For example, in some embodiments, the first direction X may be the length direction of the enclosure 21, and the second direction Y may be the width direction of the enclosure 21; the number of the first partition plates 22 is seven, and the seven first partition plates 22 are evenly arranged in sequence along the first direction, and the number of the second partition plates 23 is one, and the second partition plates 23 are distributed at the center of the enclosure 21 along the second direction Y; Figure 3 As shown, the enclosure 21, the first partition plate 22 and the second partition plate 23 can be divided to form sixteen rectangular metal shielding grids 201 with exactly the same configuration.

[0079] Thus, sixteen metal shielding grooves 101 are correspondingly formed on the metal shielding cover 10, and sixteen antenna coupling units 32 are correspondingly arranged on the antenna coupling plate 30; the antenna coupling plate 30 is arranged between the metal shielding cover 10 and the metal shielding shell 20, so that the RF connectors 323 of the sixteen antenna coupling units 32 on the antenna coupling plate 30 are respectively arranged in the corresponding metal shielding grooves 101, and the coupling antennas 325 of the sixteen antenna coupling units 32 on the antenna coupling plate 30 are respectively arranged in the corresponding metal shielding grids 201, so as to synchronously calibrate and detect the sixteen product units.

[0080] Please refer to Figures 1 to 7 In a second aspect, an embodiment of the present application further provides a calibration device (not shown in the figure), including the Bluetooth coupling calibration test fixture 1000 as described above.

[0081] The calibration device provided in the embodiment of the present application includes the above-mentioned Bluetooth coupling calibration test fixture 1000. On the basis that the above-mentioned Bluetooth coupling calibration test fixture 1000 can effectively improve the accuracy of calibration test data, the calibration device has higher accuracy in product calibration testing.

[0082] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A Bluetooth coupling calibration test fixture for accommodating multiple product units on a circuit board, characterized in that: The Bluetooth coupling calibration test fixture comprises: A jig body, wherein a plurality of metal shielding cavities are formed inside the jig body, and each of the metal shielding cavities has the same configuration; one end of the metal shielding cavity passes through the jig body and is connected to the outside; the jig body is used to abut against the circuit board so that the plurality of product units are respectively accommodated in the corresponding metal shielding cavities.

2. The Bluetooth coupling calibration test fixture according to claim 1, characterized in that: The fixture body comprises a metal shielding cover and a metal shielding shell, the metal shielding shell is formed with a plurality of metal shielding grids arranged in a through manner, and the metal shielding cover is formed with a plurality of metal shielding grooves; The metal shielding cover is sealed on one end of the metal shielding shell, so that the metal shielding grid and the corresponding metal shielding groove are combined to form the metal shielding cavity.

3. The Bluetooth coupling calibration test fixture according to claim 2, characterized in that: The Bluetooth coupling calibration test fixture also includes an antenna coupling board, which includes a substrate and a plurality of antenna coupling units arranged on the substrate; the substrate is clamped between the metal shielding cover and the metal shielding shell so that the antenna coupling units are respectively accommodated in the corresponding metal shielding grid and the metal shielding groove.

4. The Bluetooth coupling calibration test fixture according to claim 3, characterized in that: The substrate has a first surface and an opposite second surface; the antenna coupling unit comprises a first dielectric substrate, a second dielectric substrate, a radio frequency connector, a feeding branch and a coupling antenna, the first dielectric substrate and the feeding branch are arranged on the first surface, the second dielectric substrate is arranged on the second surface, and the coupling antenna is arranged on the second dielectric substrate; in the thickness direction of the substrate, the coupling antenna overlaps at least part of the feeding branch; The RF connector is arranged on the first surface, the inner core of the RF connector is electrically connected to the feeding branch, and the outer core of the RF connector is passed through the substrate and is electrically connected to the first dielectric substrate and the second dielectric substrate; a first through hole is opened on the metal shielding cover, and a part of the RF connector is used to pass through the first through hole.

5. The Bluetooth coupling calibration test fixture according to claim 4, characterized in that: The antenna coupling unit also includes an optical coupling probe, and the metal shielding cover is also provided with a second through hole, and the second through hole is used for the optical coupling probe to pass through.

6. The Bluetooth coupling calibration test fixture according to claim 5, characterized in that: There is a gap between the first dielectric substrates of adjacent antenna coupling units; the slot end of the metal shielding slot abuts against the substrate at the gap.

7. The Bluetooth coupling calibration test fixture according to claim 6, characterized in that: A partition structure is also provided in the metal shielding groove, and the partition structure is configured to separate the metal shielding groove into a first groove body and a second groove body; in the thickness direction of the substrate, the coupling antenna is located within the range of the first groove body, and the RF connector and the optical coupling probe are located within the range of the second groove body.

8. The Bluetooth coupling calibration test fixture according to claim 7, characterized in that: The partition structure is provided with an avoidance groove, and the feeding branch is configured to be able to pass through the avoidance groove.

9. The Bluetooth coupling calibration test fixture according to any one of claims 2 to 8, characterized in that: The metal shielding shell includes an enclosure, at least one first partition plate distributed in the enclosure at intervals in sequence along a first direction, and at least one second partition plate distributed in the enclosure at intervals in sequence along a second direction; the first partition plate and the second partition plate divide the enclosure into a plurality of metal shielding grids; wherein the first direction intersects with the second direction.

10. A calibration device, characterized in that: It comprises a Bluetooth coupling calibration test fixture as described in any one of claims 1 to 9.

Images