Calibrator for BTB test probe

Abstract

The utility model discloses a calibrator for a BTB test probe, which comprises an external shell and a test assembly, and is characterized in that the external shell is internally provided with a mounting cavity; the testing assembly comprises a hollow outer conductor, at least one inner conductor which is parallel to the axis of the outer conductor and is arranged in the outer conductor, and an insulating medium which is arranged between the two conductors and enables the two conductors to be mutually kept. Wherein the mounting part of the outer conductor is embedded in the mounting cavity and is fixedly provided with a rear cover assembly; and the butt joint part of the outer conductor is exposed out of the outer shell and is matched with the connector to be tested in shape. The calibrator for the BTB test probe provided by the utility model is simple and reliable in structure and convenient to operate, not only can be compatible with simultaneous calibration of a plurality of channels, but also can complete calibration by two steps without an external adapter, can determine path attenuation through open circuit and short circuit measurement, and can realize accurate calibration by combining two kinds of measurement information. And the absolute value of the transmission scattering parameter S21 of the BTB test probe can be calculated.

Description

Technical Field

[0001] The utility model belongs to the technical field of calibration equipment, and in particular relates to a calibrator for a BTB test probe. Background Art

[0002] With the rapid development of the communications industry and the continuous upgrading of mobile phones, BTB RF connectors are widely used in new mobile phones. Testing is a crucial step in the production process. The test yield is also an important indicator of each company's production capacity. As a RF channel test probe dedicated to the new BTB connector, the BTB RF test probe is used to connect the BTB connector to be tested with the test instrument to detect the connection quality and stability of the BTB connector, and evaluate the impedance matching, signal loss and other performance of the BTB connector to help ensure the performance and reliability of the entire RF system.

[0003] The calibrator for BTB RF test probe is a device specially used to calibrate BTB RF test probe to correct the error of BTB RF test probe and ensure the accuracy and reliability of the test results of BTB RF test probe. However, due to the ultra-small pitch and multi-channel characteristics of BTB RF test probe, and the non-uniqueness of the parameters such as the PIN position definition, PIN position spacing and external dimensions of the BTB connector, each manufacturer has its own definition, and there is no universal calibration part on the market. According to the conventional calibration method, the following steps need to be completed: 1. External adapter test head; 2. Add an adapter adapter connected to the calibration part to the adapter test head; 3. Complete the calibration of a single channel O / S / L in three steps; 4. Repeat steps 2 and 3 to complete the entire calibration. It can be seen that the above steps are not only cumbersome but also easy to miss. It is impossible to ensure consistency and it is difficult to adapt to automated testing. After calibration, it is also difficult to eliminate the errors caused by the adapter test head and adapter adapter. Therefore, many mobile phone manufacturers choose not to calibrate the test, resulting in the loss error of BTB being transferred to the entire RF circuit. If you want to ensure product performance and make the entire RF circuit meet the established indicators, you will have more stringent requirements on the indicators of other components, which will eventually lead to an increase in the overall cost. Utility Model Content

[0004] The utility model aims to provide a calibrator for a BTB test probe, which is compatible with simultaneous calibration of multiple channels, does not require an external adapter, and can complete calibration in only two steps, thereby ensuring calibration consistency and being suitable for automated testing.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A calibrator for a BTB test probe comprises an external shell and a test assembly, wherein a mounting chamber is arranged inside the external shell; the test assembly comprises a hollow outer conductor, at least one inner conductor arranged inside the outer conductor parallel to the axis of the outer conductor, and an insulating medium arranged between the two conductors to hold the two conductors mutually; wherein the mounting portion of the outer conductor is embedded in the mounting chamber and is fixedly provided with a rear cover assembly; the butt joint portion of the outer conductor is exposed outside the external shell and is adapted to the shape of a connector to be tested.

[0007] Furthermore, the rear cover assembly includes a first cover body, which is welded and fixed to the end of the mounting portion of the outer conductor and abuts against the inner conductor, so that the inner conductor and the outer conductor are electrically connected to form a short circuit tester.

[0008] Furthermore, the abutting portion where the first cover body contacts the inner conductor is provided with a chamfer having a centering and guiding function to ensure that the axes of the inner conductor and the outer conductor are parallel.

[0009] Furthermore, the rear cover assembly includes a second cover body and an insulating cover cap, the second cover body is welded and fixed to the end of the mounting portion of the outer conductor to axially limit the inner conductor, and the insulating cover cap is arranged on one end of the inner conductor close to the second cover body to avoid electrical conduction between the inner conductor and the outer conductor, thereby forming an open circuit tester.

[0010] Furthermore, the inner conductor is a spring probe, comprising a hollow main body and a floating part telescopically installed in the main body via a spring.

[0011] Furthermore, a limit slot for controlling the floating height is opened on the outer wall of the floating part. Correspondingly, the insulating medium includes a first insulator which is clamped between the floating part and the outer conductor through the limit slot. The inner diameter of the first insulator is larger than the outer diameter of the float at the limit slot, smaller than the outer diameter of the main body, and is in contact with the main body.

[0012] Furthermore, the insulating medium also includes a second insulator disposed below the first insulator, the second insulator is gap-matched with the floating portion, and abuts against a limiting ring on the inner side wall of the docking portion.

[0013] Furthermore, the mounting portion of the outer conductor is interference-fitted with the mounting cavity of the external shell, and the outer conductor is riveted and embedded in the mounting cavity.

[0014] Furthermore, a limiting platform is provided between the mounting portion and the docking portion of the outer conductor to ensure the installation depth of the outer conductor.

[0015] Furthermore, a fixed bottom plate is provided on the outside of the external shell, and a fixing hole is opened on the fixed bottom plate to facilitate disassembly and assembly on the fixture.

[0016] Compared with the prior art, the beneficial technical effects are:

[0017] The calibrator for the BTB test probe provided by the utility model has a simple and reliable structure, is easy to operate, is compatible with multiple channels for simultaneous calibration, and does not require an external adapter. The calibration can be completed in two steps. The path attenuation can be determined by open circuit and short circuit measurements. By combining the two measurement information, the absolute value of the transmission scattering parameter S21 of the BTB test probe can be calculated. In addition, by combining multiple open circuits or short circuits side by side to form an open circuit array or a short circuit array, the purpose of multiple calibrations can be achieved through one connection through channel switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 A schematic diagram of the overall structure of a calibrator for a BTB test probe provided in an embodiment of the utility model;

[0020] Figure 2 A cross-sectional view of a BTB test probe calibrator provided in an embodiment of the utility model when constituting an open circuit tester;

[0021] Figure 3 An exploded diagram of a BTB test probe calibrator provided in an embodiment of the utility model constituting an open circuit tester;

[0022] Figure 4 A cross-sectional view of a BTB test probe calibrator provided in an embodiment of the utility model when constituting a closed-circuit tester;

[0023] Figure 5 An exploded diagram of a BTB test probe calibrator provided in an embodiment of the utility model constituting a closed-circuit tester.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-external shell, 101-installation chamber, 102-fixed bottom plate, 103-fixed hole, 2-outer conductor, 201-installation part, 202-docking part, 203-limiting platform, 3-inner conductor, 301-main body, 302-floating part, 4-insulating medium, 401-first insulator, 402-second insulator, 5-first cover body, 6-second cover body, 7-insulating cap. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The embodiment of the utility model provides a calibrator for a BTB test probe, comprising an external housing 1 and a test assembly. A fixed base plate 102 is provided on the outside of the external housing 1, and a fixing hole 103 is provided on the fixed base plate 102 to facilitate disassembly and assembly on a fixture. An installation chamber 101 is provided inside the external housing 1, and the installation chamber 101 is a cylindrical blind hole for installation of the test assembly.

[0028] like Figures 1 to 5 As shown, the test assembly includes an outer conductor 2, an inner conductor 3, an insulating medium 4 and a back cover assembly. The outer conductor 2 is a hollow structure, including a mounting portion 201 and a docking portion 202. The mounting portion 201 of the outer conductor 2 is interference-fitted with the mounting chamber 101 of the outer shell 1. Specifically, in this embodiment, the mounting portion 201 is embedded in the mounting chamber 101 by riveting. The shape of the docking portion 202 of the outer conductor 2 is adapted to the shape of the connector to be tested, and a limiting platform 203 is further provided between the mounting portion 201 and the docking portion 202 of the outer conductor 2. The limiting platform 203 can axially limit the installation depth of the mounting portion 201 when the outer conductor 2 is fixed by riveting, so as to ensure that the docking portion 202 of the outer conductor 2 is exposed outside the outer shell 1.

[0029] In this embodiment, there are multiple inner conductors 3, which are arranged in the outer conductor 2 parallel to the axis of the outer conductor 2. The inner conductor 3 is a spring probe, which includes a hollow main body 301 and a floating part 302 slidably installed in the main body 301 through a spring. The main body 301 is located in the mounting part 201 of the outer conductor 2, and the floating part 302 is located in the docking part 202 of the outer conductor 2, which is used to directly contact with the BTB RF test probe to ensure that multiple channels can be stably contacted, while avoiding the influence of inconsistent probe heights of each channel of the BTB test probe on calibration.

[0030] The insulating medium 4 is arranged between the inner conductor 3 and the outer conductor 2, and can separate the inner conductor 3 from the outer conductor 2, and can also cooperate with the back cover assembly to fix the main body 301 of the inner conductor 3. Specifically, the insulating medium 4 includes a first insulator 401 and a second insulator 402. Correspondingly, a limit slot for controlling the floating height is provided on the outer wall of the floating part 302. The inner diameter of the first insulator 401 is larger than the outer diameter of the floating part at the limit slot, and smaller than the outer diameter of the main body 301. The first insulator 401 is clamped between the floating part 302 and the outer conductor 2 through the limit slot, and abuts against the main body 301 to limit the floating part 302 axially. The second insulator 402 is arranged below the first insulator 401 and abuts against the limiting ring on the inner wall of the docking part 202. The second insulator 402 is clearance-matched with the floating part 302, which can provide guidance and protection for the floating part 302 while ensuring that the floating part 302 can float normally.

[0031] like Figure 2 and Figure 3 As shown, in order to be able to perform open circuit detection on the BTB RF test probe, the back cover assembly includes a first cover body 5, which is welded and fixed to the end of the mounting portion 201 of the outer conductor 2 and abuts against the inner conductor 3. The first cover body 5 plays a role in fixing the inner conductor 3 by cooperating with the insulating medium 4. Furthermore, the abutting portion where the first cover body 5 contacts the inner conductor 3 is provided with a chamfer with a centering and guiding function, ensuring that the inner conductor 3 can be parallel to the axis of the outer conductor 2 during installation. The first cover body 5 can make the inner conductor 3 electrically conductive with the outer conductor 2, thereby forming a short circuit tester.

[0032] like Figure 4 and Figure 5 As shown, in order to be able to perform short-circuit detection on the BTB RF test probe, the back cover assembly includes a second cover body 6 and an insulating cap 7. The second cover body 6 is welded and fixed to the end of the mounting portion 201 of the outer conductor 2. The first cover body 5 cooperates with the insulating medium 4. The insulating cap 7 is covered on one end of the inner conductor 3 close to the second cover body 6. The first cover body 5 is pressed on the insulating cap 7, which not only fixes the inner conductor 3, but also avoids electrical conduction between the inner conductor 3 and the outer conductor 2, thereby forming an open circuit tester.

[0033] The working principle of the utility model is to calculate the absolute value of the transmission scattering parameter S21 of the BTB test probe through open circuit and short circuit measurements, and determine the loss of the path where the BTB test probe is located by combining the two measurement information. Therefore, it is worth mentioning that by combining multiple open circuit testers or short circuit testers side by side to form an open circuit array or a short circuit array, the purpose of multiple calibrations can be achieved through one connection through channel switching.

[0034] The above-mentioned embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A calibrator for a BTB test probe, characterized in that: include: An external housing (1) having an installation chamber (101) disposed therein; A test assembly comprising a hollow outer conductor (2), at least one inner conductor (3) arranged inside the outer conductor (2) parallel to the axis of the outer conductor (2), and an insulating medium (4) arranged between the two conductors to hold the two conductors mutually; The mounting portion (201) of the outer conductor (2) is embedded in the mounting chamber (101) and is fixed with a rear cover assembly; the docking portion (202) of the outer conductor (2) is exposed outside the external housing (1) and is adapted to the shape of the connector to be tested.

2. A calibrator for a BTB test probe according to claim 1, characterized in that: The rear cover assembly comprises a first cover body (5), the first cover body (5) being welded and fixed to the end of the mounting portion (201) of the outer conductor (2) and abutting against the inner conductor (3), so that the inner conductor (3) and the outer conductor (2) are electrically conductive, thereby forming a short circuit tester.

3. A calibrator for a BTB test probe according to claim 2, characterized in that: The abutment portion where the first cover body (5) contacts the inner conductor (3) is provided with a chamfer having a centering and guiding function, so as to ensure that the axes of the inner conductor (3) and the outer conductor (2) are parallel.

4. The calibrator for a BTB test probe according to claim 1, characterized in that: The rear cover assembly comprises a second cover body (6) and an insulating cover cap (7); the second cover body (6) is welded and fixed to the end of the mounting portion (201) of the outer conductor (2) to axially limit the inner conductor (3); the insulating cover cap (7) is arranged to cover an end of the inner conductor (3) close to the second cover body (6) to prevent the inner conductor (3) from being electrically conductive with the outer conductor (2), thereby forming an open circuit tester.

5. A calibrator for a BTB test probe according to any one of claims 2 or 4, characterized in that: The inner conductor (3) is a spring probe, comprising a hollow main body (301) and a floating part (302) slidably installed in the main body (301) through a spring.

6. A calibrator for a BTB test probe according to claim 5, characterized in that: A limiting slot for controlling the floating height is provided on the outer wall of the floating portion (302). Correspondingly, the insulating medium (4) comprises a first insulator (401). The first insulator (401) is clamped between the floating portion (302) and the outer conductor (2) through the limiting slot. The inner diameter of the first insulator (401) is larger than the outer diameter of the floating portion at the limiting slot, smaller than the outer diameter of the main body (301), and is in contact with the main body (301).

7. A calibrator for a BTB test probe according to claim 6, characterized in that: The insulating medium (4) further comprises a second insulator (402) disposed below the first insulator (401); the second insulator (402) is clearance-matched with the floating portion (302) and abuts against a limit ring on the inner wall of the docking portion (202).

8. The calibrator for a BTB test probe according to claim 1, characterized in that: The mounting portion (201) of the outer conductor (2) is interference-fitted with the mounting chamber (101) of the external shell (1), and the outer conductor (2) is riveted and embedded in the mounting chamber (101).

9. The calibrator for a BTB test probe according to claim 1, characterized in that: A limiting platform (203) is also provided between the mounting portion (201) and the docking portion (202) of the outer conductor (2) to ensure the mounting depth of the outer conductor (2).

10. The calibrator for a BTB test probe according to claim 1, characterized in that: A fixed bottom plate (102) is also provided on the outside of the external shell (1), and a fixing hole (103) is provided on the fixed bottom plate (102) to facilitate assembly and disassembly on the fixture.

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