Attenuator testing device

Abstract

The utility model provides an attenuator testing device, which is used for solving the technical problem of screening the impedance of an attenuator. The attenuator testing device comprises a tool body, an impedance matching assembly and a first wire group, the tool body is provided with an installation interface, and the installation interface is configured to be electrically connected with a first port, a second port and a grounding port of a to-be-tested attenuator when the to-be-tested attenuator is installed on the installation interface. The impedance matching assembly is installed on the tool body and electrically connected with the installation interface, the impedance matching assembly is electrically connected with the first port and the grounding port of the to-be-tested attenuator through the installation interface to form a to-be-tested impedance network, and the impedance of the impedance matching assembly is equivalent to the characteristic impedance of the to-be-tested attenuator. The first end of the first wire group is electrically connected with the installation interface, the first end of the first wire group is electrically connected with the second port and the grounding port of the attenuator to be detected through the installation interface, the second end of the first wire group is electrically connected with the detection equipment, and the detection equipment detects the actual impedance of the impedance network to be detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of impedance testing of attenuators, and particularly relates to an attenuator testing device. BACKGROUND

[0002] An attenuator is an electronic component for attenuating signal energy. In addition to the attenuation amount index parameter, impedance matching is also an important index parameter. Generally, an attenuator is marked with a characteristic impedance. When a device with the characteristic impedance is matched with the attenuator, optimal transmission quality can be obtained. However, for high-precision equipment, there is an error between the actual impedance of the attenuator and the designed impedance of the attenuator, so that after the attenuator is matched with the device with the characteristic impedance, the impedance precision requirement of the high-precision equipment cannot be met. Therefore, the attenuator needs to be screened. CONTENT OF THE UTILITY MODEL

[0003] The present application provides an attenuator testing device, which aims to solve the technical problem of screening attenuators to meet the impedance precision requirement of high-precision equipment.

[0004] Some embodiments of the present application provide an attenuator testing device, which comprises:

[0005] A tool body, the tool body having a mounting interface for mounting a to-be-tested attenuator, the mounting interface being configured to be electrically connected with a first port, a second port and a ground port of the to-be-tested attenuator when the to-be-tested attenuator is mounted to the mounting interface;

[0006] An impedance matching assembly, the impedance matching assembly being mounted on the tool body and being electrically connected with the mounting interface, the impedance matching assembly being electrically connected with the first port and the ground port of the to-be-tested attenuator through the mounting interface to form a to-be-tested impedance network, wherein the impedance of the impedance matching assembly is equivalent to a characteristic impedance of the to-be-tested attenuator; and

[0007] A first wire group, a first end of the first wire group being electrically connected with the mounting interface, the first end of the first wire group being electrically connected with the second port and the ground port of the to-be-tested attenuator through the mounting interface, a second end of the first wire group being electrically connected with a detection device, the detection device detecting an actual impedance of the to-be-tested impedance network.

[0008] In some embodiments, the attenuator testing device further comprises a second wire group;

[0009] A first end of the second wire group being electrically connected with the mounting interface, the first end of the second wire group being electrically connected with the first port and the ground port of the to-be-tested attenuator through the mounting interface, a second end of the second wire group being electrically connected with the impedance matching assembly.

[0010] In some embodiments, the first wire group includes two groups of first wires, the second wire group includes two groups of second wires, and the to-be-tested attenuator has a normal state and a reverse state;

[0011] When the to-be-tested attenuator is in the normal state, the first ends of the two groups of first wires are electrically connected to the second port and the ground port of the to-be-tested attenuator through the mounting interface respectively, the second ends of the two groups of first wires are electrically connected to the detection device, the first ends of the two groups of second wires are electrically connected to the first port and the ground port of the to-be-tested attenuator through the mounting interface respectively, and the second ends of the two groups of second wires are electrically connected to the two ends of the impedance matching assembly respectively.

[0012] When the to-be-tested attenuator is in the reverse state, the first ends of the two groups of first wires are electrically connected to the first port and the ground port of the to-be-tested attenuator through the mounting interface respectively, the second ends of the two groups of first wires are electrically connected to the detection device, the first ends of the two groups of second wires are electrically connected to the second port and the ground port of the to-be-tested attenuator through the mounting interface respectively, and the second ends of the two groups of second wires are electrically connected to the two ends of the impedance matching assembly respectively.

[0013] In some embodiments, one group of the first wires includes two wires.

[0014] The second ends of the four wires in the two groups of first wires are electrically connected to four measurement ports of the detection device respectively to form a wiring structure for four-wire measurement.

[0015] In some embodiments, the impedance matching assembly includes a matching resistor and a mounting seat.

[0016] The mounting seat is connected and fixed to the tool body, the matching resistor is detachably connected in the mounting seat, and the second wire group is electrically connected to the matching resistor.

[0017] In some embodiments, the mounting interface includes a mounting portion and a spring needle.

[0018] The mounting portion includes a groove provided on the tool body, and a plurality of spring needles are provided in the groove and correspond to the first port, the second port and the ground port of the to-be-tested attenuator respectively, and the first ends of the first wire group and the second wire group are electrically connected to the spring needles.

[0019] In some embodiments, the mounting interface further includes a fixing portion and a knob portion provided on the tool body.

[0020] The fixed part is arranged in the groove, the pogo pin is connected to the groove through the fixed part, and the handle part is arranged at the slot opening of the groove and is in a recessed shape relative to the surface of the tool body.

[0021] In some embodiments, the tool body further comprises a pressing assembly.

[0022] The pressing assembly comprises a bracket and a pressing piece, the bracket is arranged at the mounting interface position and connected to the tool body, the pressing piece is adjustably connected to the bracket in the direction of approaching or moving away from the tool body, and the pressing piece is used to press the to-be-tested attenuator against the mounting interface.

[0023] In some embodiments, the tool body comprises a top cover, a base and a side wall.

[0024] The top cover, the base and the side wall are connected and form a box-shaped structure with a receiving cavity, the mounting interface is arranged on the upper surface of the top cover, the impedance matching assembly is arranged in the receiving cavity, the side wall is provided with a wiring hole, and the first wire group is arranged in the receiving cavity and passes out of the tool body through the wiring hole.

[0025] In some embodiments, the side wall is provided with at least two spaced-apart wiring holes.

[0026] The first wire group comprises a plurality of wires, and the plurality of wires respectively pass out of the tool body through different wiring holes.

[0027] According to the attenuator testing device in the above embodiments, by arranging the mounting interface on the tool body and electrically connecting the mounting interface with the impedance matching assembly and the first wire group respectively, after the to-be-tested attenuator is mounted to the mounting interface, the impedance matching assembly can be electrically connected with the first port and the ground port of the to-be-tested attenuator through the mounting interface, and the first wire group can be electrically connected with the second port and the ground port of the to-be-tested attenuator through the mounting interface, so that the impedance matching assembly with an impedance equivalent to the characteristic impedance of the to-be-tested attenuator can be electrically connected with the to-be-tested attenuator to form a to-be-tested impedance network. During screening, only the to-be-tested attenuator needs to be mounted to the mounting interface, and the first wire group needs to be electrically connected to the detection equipment, so that whether the overall impedance of the to-be-tested impedance network meets the impedance precision requirement of high-precision equipment can be detected by the detection equipment, so that the attenuator material can be quickly screened.

[0028] Unlike the way of testing the impedance of each attenuator separately, since the attenuator material is ultimately used with devices having characteristic impedance, the testing device provided by the application does not test the impedance of each attenuator separately, but tests the impedance network formed by the attenuator to be tested and the impedance matching assembly as a whole, which not only avoids the complex mathematical operation of testing the attenuator separately, but also quickly screens the attenuator material, so as to improve the efficiency of attenuator screening, and the screened attenuator can meet the impedance precision requirement of high-precision equipment. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a stereoscopic structure schematic diagram of the attenuator testing device in an embodiment of the application and a detection equipment electrically connected;

[0030] Figure 2 It is a stereoscopic structure schematic diagram of the attenuator testing device in an embodiment of the application and a detection equipment electrically connected; Figure 1 It is a stereoscopic structure schematic diagram of the attenuator testing device in an embodiment of the application and a detection equipment electrically connected;

[0031] Figure 3 It is a stereoscopic structure schematic diagram of the attenuator testing device in an embodiment of the application and a detection equipment electrically connected; Figure 2 It is an enlarged structure schematic diagram of A of the attenuator testing device in an embodiment of the application;

[0032] Figure 4 It is a front view structure schematic diagram of the attenuator testing device in an embodiment of the application; Figure 2 It is a front view structure schematic diagram of the attenuator testing device in an embodiment of the application;

[0033] Figure 5 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application; Figure 1 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application;

[0034] Figure 6 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application; Figure 1 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application;

[0035] Figure 7 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application; Figure 5 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application;

[0036] Figure 8 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application; Figure 6 It is a testing system topology diagram of the attenuator to be tested in an embodiment of the application and the attenuator testing device in an embodiment of the application.

[0037] Wherein:

[0038] 1 - tool body; 10 - accommodating cavity; 11 - mounting interface; 111 - mounting portion; 112 - spring needle; 113 - fixing portion; 114 - handle portion; 12 - pressing assembly; 121 - bracket; 122 - pressing piece; 131 - top cover; 132 - base; 133 - side wall; 134 - wiring hole; 2 - impedance matching assembly; 21 - matching resistor; 22 - mounting seat; 3 - first wire group; 30 - first conducting wire; 300 - conducting wire; 4 - second wire group; 40 - second conducting wire; 5 - attenuator to be tested; 51 - first port; 52 - second port; 53 - grounding port; 6 - detection device. DETAILED DESCRIPTION

[0039] The application will be further described below in connection with specific embodiments with reference to the drawings. Like numbers in different embodiments represent similar elements. In the following embodiments, many details are described for the purpose of providing a more thorough understanding of the application. However, it will be apparent to those skilled in the art that some features that are not described in detail can be omitted, or replaced by other elements, materials, methods, etc. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core of the application being overwhelmed by too much description, and it is not necessary to describe these operations in detail for those skilled in the art, who can fully understand the related operations according to the description in the specification and general technical knowledge in the art.

[0040] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing one embodiment, and do not mean that the composition and / or order is necessary.

[0041] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connections (couplings) unless otherwise specified.

[0042] In actual production, different attenuators have different characteristic impedances. For example, an attenuator marked with a 50Ω characteristic impedance indicates that the attenuator needs to be electrically connected with a device with an impedance of 50Ω to obtain optimal transmission quality. However, generally, due to the low impedance accuracy of the attenuator itself, even if the impedance of the device can reach an accurate 50Ω, the overall actual impedance of the attenuator and the device cannot reach an accurate 50Ω after the attenuator is electrically connected with the device, for example, it may be 49Ω or 48Ω. Therefore, in order to meet the requirement of high-precision equipment on the impedance matching accuracy of the attenuator, it is necessary to screen the impedance of the attenuator. However, due to the different series-parallel connection design of resistors in different attenuators, if the impedance of each attenuator is tested separately, the impedance of the attenuator can be obtained only after a plurality of data of different ports of the attenuator are tested and complex mathematical operations are performed, and error accumulation is also likely to occur in the process of testing and operation.

[0043] In addition, although the industry provides the impedance value of the attenuator in the material data manual of the attenuator, the impedance value provided in the material data manual is only a typical value of the impedance, and there is no detailed impedance accuracy information of the attenuator material. When the impedance accuracy of the attenuator material cannot meet the use requirement of high-precision equipment, it is still necessary to screen the attenuator material twice.

[0044] In order to screen the attenuator, the present application provides an attenuator testing device, as shown in Figures 1 to 6 The attenuator testing device can include a tool body 1, an impedance matching assembly 2, and a first wire group 3. The tool body 1 has a mounting interface 11 for mounting a to-be-tested attenuator 5. The mounting interface 11 is configured to be electrically connected with a first port 51, a second port 52, and a ground port 53 of the to-be-tested attenuator 5 when the to-be-tested attenuator 5 is mounted to the mounting interface 11. The impedance matching assembly 2 is mounted on the tool body 1 and is electrically connected with the mounting interface 11. The impedance matching assembly 2 is electrically connected with the first port 51 and the ground port 53 of the to-be-tested attenuator 5 through the mounting interface 11 to form a to-be-tested impedance network, wherein the impedance of the impedance matching assembly 2 is equivalent to the characteristic impedance of the to-be-tested attenuator 5. A first end of the first wire group 3 is electrically connected with the mounting interface 11. The first end of the first wire group 3 is electrically connected with the second port 52 and the ground port 53 of the to-be-tested attenuator 5 through the mounting interface 11. A second end of the first wire group 3 is electrically connected with a detection device 6. The detection device 6 detects the actual impedance of the to-be-tested impedance network.

[0045] This application provides an installation interface 11 on the fixture body 1, and electrically connects the installation interface 11 to the impedance matching component 2 and the first wire group 3 respectively. After the attenuator under test 5 is installed on the installation interface 11, the impedance matching component 2 can be electrically connected to the first port 51 and the ground port 53 of the attenuator under test 5 through the installation interface 11. The first wire group 3 can be electrically connected to the second port 52 and the ground port 53 of the attenuator under test 5 through the installation interface 11. This allows the impedance matching component 2, whose impedance is equivalent to the characteristic impedance of the attenuator under test 5, to be electrically connected to the attenuator under test 5 to form a test impedance network. During screening, only the attenuator under test 5 needs to be installed on the installation interface 11, and the first wire group 3 electrically connected to the detection device 6. The detection device 6 can then detect whether the overall impedance of the test impedance network meets the impedance accuracy requirements of high-precision equipment, thus enabling rapid screening of attenuator materials.

[0046] Unlike the method of testing the impedance of each attenuator individually, since attenuator materials are always used in conjunction with devices with characteristic impedance, the test device provided in this application does not test the impedance of each attenuator individually. Instead, it tests the network of impedance under test formed by the attenuator 5 and the impedance matching component 2 as a whole. This not only avoids the complex mathematical calculations required for testing each attenuator individually, but also enables rapid screening of attenuator materials, thereby improving the efficiency of attenuator screening. Furthermore, the screened attenuators can meet the impedance accuracy requirements of high-precision equipment.

[0047] The attenuator under test 5 can be a surface-mount attenuator, a thin-film attenuator, or a coaxial attenuator, etc. The impedance matching component 2 can be a resistor, capacitor, or interface terminal with impedance parameters such as 25Ω, 50Ω, or 75Ω, depending on the characteristic impedance of the attenuator under test 5. The testing equipment 6 can be a multimeter, oscilloscope, or LCR meter, etc., used for measuring impedance parameters. This application does not impose any special restrictions on the specific parameters and types of the impedance matching component 2, the attenuator under test 5, and the testing equipment 6.

[0048] In some embodiments, such as Figure 2 and Figure 4As shown, the attenuator testing device may further include a second wire group 4; the first end of the second wire group 4 is electrically connected to the mounting interface 11, and the first end of the second wire group 4 is electrically connected to the first port 51 and the ground port 53 of the attenuator 5 under test through the mounting interface 11; the second end of the second wire group 4 is electrically connected to the impedance matching component 2. For example, the impedance matching component 2 may be configured as a resistor, which is electrically connected to the mounting interface 11 through the second wire group 4. When the attenuator 5 under test is installed on the mounting interface 11, the resistor can be electrically connected to the attenuator 5 under test through the mounting interface 11 to form a test impedance network. In other embodiments, the impedance matching component 2 may also be configured as an interface terminal, which can be directly electrically connected to the mounting interface 11, so that the attenuator 5 under test can be electrically connected to the interface terminal through the mounting interface 11 by plugging in. In this case, the second wire group 4 is not required. Depending on the type of impedance matching component 2, this application does not impose any special restrictions on the specific method of electrical connection between the impedance matching component 2 and the mounting interface 11.

[0049] Theoretically, an attenuator can be simply equivalent to a two-port resistor network. That is, the attenuator can be used either with port 51 as the input and port 52 as the output, or vice versa, and theoretically, the impedance parameters exhibited in these two usage modes are the same. However, in actual material testing, the impedance performance with port 51 as the input and port 52 as the output differs from that with port 51 as the output and port 52 as the input. Therefore, the attenuator faces impedance matching accuracy issues in practical applications depending on the input and output directions. To address this, the testing device of this application also provides impedance accuracy detection functionality for the attenuator 5 under different input and output conditions, ensuring that the selected attenuators better meet the impedance accuracy requirements of high-precision equipment.

[0050] Specifically, in some embodiments, such as Figure 5 and Figure 6 As shown, the first wire group 3 may include two sets of first conductors 30, the second wire group 4 may include two sets of second conductors 40, and the attenuator under test 5 has a positive mounting state and a reverse mounting state. Figure 5As shown, when the attenuator under test 5 is in the upright mounting state, the first ends of the two sets of first wires 30 are electrically connected to the second port 52 and the ground port 53 of the attenuator under test 5 respectively through the mounting interface 11. The second ends of the two sets of first wires 30 are electrically connected to the testing device 6. The first ends of the two sets of second wires 40 are electrically connected to the first port 51 and the ground port 53 of the attenuator under test 5 respectively through the mounting interface 11. The second ends of the two sets of second wires 40 are electrically connected to the two ends of the impedance matching component 2 respectively. At this time, the attenuator under test 5 is used with the first port 51 as the input terminal and the second port 52 as the output terminal. The testing device 6 can test the impedance parameters of the impedance network under test when the attenuator under test 5 is in the upright mounting state.

[0051] After the test in the normal installation state is completed, the attenuator 5 under test can be reversed by changing the wiring position of the first wire 30 and the second wire 40 between the first port 51 and the second port 52. Specifically, as follows: Figure 6 As shown, when the attenuator under test 5 is in reverse installation, the first ends of the two sets of first wires 30 are electrically connected to the first port 51 and the ground port 53 of the attenuator under test 5 respectively through the mounting interface 11. The second ends of the two sets of first wires 30 are electrically connected to the testing device 6. The first ends of the two sets of second wires 40 are electrically connected to the second port 52 and the ground port 53 of the attenuator under test 5 respectively through the mounting interface 11. The second ends of the two sets of second wires 40 are electrically connected to the two ends of the impedance matching component 2 respectively. At this time, the attenuator under test 5 is used with the first port 51 as the output terminal and the second port 52 as the input terminal. The testing device 6 can test the impedance parameters of the impedance network under test when the attenuator under test 5 is in reverse installation.

[0052] The method of changing the wiring positions of the first wire 30 and the second wire 40 can be achieved by directly disconnecting the first end of the first wire 30 from the second port 52 of the attenuator 5 under test and then electrically connecting it to the first port 51; and disconnecting the first end of the second wire 40 from the first port 51 of the attenuator 5 under test and then electrically connecting it to the second port 52. Alternatively, the first wire 30 can be split into two segments, with a switch or switching interface placed between the two segments, and the second wire 40 can be split into two segments and electrically connected to the switch or switching interface. By controlling the switch or changing the direction of the switching interface, the wiring sequence of the first wire 30 and the second wire 40 between the first port 51 and the second port 52 can be switched, thereby changing the input and output direction of the attenuator 5 under test during testing. This application does not impose any special restrictions on the specific method of switching the wiring sequence of the first wire 30 and the second wire 40 between the first port 51 and the second port 52. Of course, if the first port 51 and the second port 52 of the attenuator under test 5 can be swapped by rotating or flipping, then there is no need to change the wiring position of the first wire 30 and the second wire 40.

[0053] In other embodiments, when the impedance matching component 2 is set as an interface terminal, it does not affect the selection of the two test directions for the attenuator under test 5. For example, when the impedance matching component 2 is set as an interface terminal, the attenuator under test 5 can be electrically connected to the interface terminal via the mounting interface 11 in a forward plug-in manner, or the attenuator under test 5 can also be electrically connected to the interface terminal via the mounting interface 11 in a reverse plug-in manner, thereby realizing the function of impedance testing of the attenuator under test 5 in different input and output directions. Therefore, the testing device provided in this application can be applied to the testing of various types of attenuator materials.

[0054] During testing, to improve the accuracy of the impedance network under test, in addition to considering the test direction of the attenuator 5, it is also necessary to consider the impedance effect brought about by the conductor itself. Therefore, in some embodiments, such as Figure 7 and Figure 8 As shown, a set of first conductors 30 may include two conductors 300, and two sets of first conductors 30 may include four conductors 300. The second ends of the four conductors 300 are electrically connected to the four measuring ports of the detection device 6, respectively, to form a four-wire measurement wiring structure. For example, as... Figure 7As shown, when the attenuator 5 under test is in the upright position, the first ends of two of the wires 300 are electrically connected to the second port 52 of the attenuator 5, and the first ends of the other two wires 300 are electrically connected to the ground port 53 of the attenuator 5. The second ends of the four wires 300 are electrically connected to the four measurement ports of the testing device 6. The first end of the second wire 40 is electrically connected to the first port 51 and the ground port 53 of the attenuator 5, thus enabling four-wire measurement of the attenuator 5 in the upright position. Figure 8 As shown, when the attenuator under test 5 is in the reverse installation state, the first ends of the two wires 300 that are originally electrically connected to the second port 52 of the attenuator under test 5 are electrically connected to the first port 51, and the first end of the second wire 40 that is originally electrically connected to the first port 51 of the attenuator under test 5 is electrically connected to the second port 52. The connection method of the remaining wires remains unchanged, which allows the attenuator under test 5 to be measured in the reverse installation state using four-wire measurement. Therefore, by using the four-wire measurement wiring method to test the impedance parameters of the impedance network under test, the impedance influence brought by the wires themselves can be eliminated, thereby improving the accuracy of the impedance network test.

[0055] The above embodiments provide a detailed description of the wiring structure of the test apparatus used to measure the attenuator 5 under test. To better illustrate the content of this application, the following embodiments will provide a detailed description of the specific structure of the test apparatus. In some embodiments, for the impedance matching component 2, such as... Figure 2 As shown, the impedance matching assembly 2 may include a matching resistor 21 and a mounting base 22. The mounting base 22 is fixedly connected to the fixture body 1, and the matching resistor 21 is detachably connected within the mounting base 22. The second wire group 4 is electrically connected to the matching resistor 21. Therefore, by configuring the impedance matching assembly 2 with a detachable connection between the matching resistor 21 and the mounting base 22, the matching resistor 21 can be replaced according to the characteristic impedance parameters of different attenuators 5 under test. This allows the testing device to screen different types of attenuators 5 under test, thereby improving the utilization rate of the testing device. For example, when testing an attenuator 5 with a characteristic impedance of 50Ω, a 50Ω matching resistor 21 can be installed in the mounting base 22; when testing an attenuator 5 with a characteristic impedance of 75Ω, a 75Ω matching resistor 21 can replace the 50Ω matching resistor 21 in the mounting base 22.

[0056] Regarding the mounting interface 11, in some embodiments, such as Figure 2 and Figure 3As shown, the mounting interface 11 may include a mounting part 111 and spring pins 112. The mounting part 111 may include a groove on the tooling body 1, and multiple spring pins 112 are disposed in the groove, corresponding to the first port 51, the second port 52, and the ground port 53 of the attenuator 5 under test, respectively. The first ends of the first wire group 3 and the second wire group 4 are both electrically connected to the spring pins 112. In this way, when the attenuator 5 under test is installed on the mounting part 111, the multiple spring pins 112 can contact and electrically connect with the first port 51, the second port 52, and the ground port 53 of the attenuator 5 under test, respectively, so that the testing device 6 can test the impedance network under test. Each spring pin 112 may have a different stroke when contacting each port of the attenuator 5 under test, so that each port of the attenuator 5 under test maintains good contact with the spring pin 112, thereby improving the testing accuracy of the impedance network under test. Of course, in other embodiments, electrode springs can also be used instead of spring pins 112.

[0057] Furthermore, when the mounting portion 111 is configured as a groove, the shape of the inner wall of the groove can be adapted to the outer contour shape of the attenuator 5 under test, so that when the attenuator 5 under test is installed in the groove, the groove has the function of positioning and fixing the attenuator 5 under test. In other embodiments, depending on the shape of the attenuator 5 under test, the mounting portion 111 can also be configured as a boss structure, or the mounting portion 111 can be configured as having a limiting protrusion relative to the surface of the tooling body 1, so that the attenuator 5 under test can be positioned and fixed in the limiting protrusion. For example, when the attenuator 5 under test is a columnar structure, the mounting portion 111 can also be configured as a circular boss or a circular limiting protrusion. This application does not impose any special restrictions on the specific shape of the mounting portion 111.

[0058] In some embodiments, such as Figure 3As shown, the mounting interface 11 may further include a fixing part 113 and a latching part 114 disposed on the tooling body 1; the fixing part 113 is disposed in a groove, and the spring pin 112 is connected to the groove through the fixing part 113; the latching part 114 is disposed at the groove opening and is recessed relative to the surface of the tooling body 1. For example, the fixing part 113 may be configured as a C-shaped slot structure with an opening, and the opening of the slot structure communicates with the groove, so that the spring pin 112 can be latched into the fixing part 113 from the opening of the slot, so as to facilitate the wire changing operation of the spring pin 112 when the test direction of the attenuator 5 under test changes. In other embodiments, the fixing part 113 may also adopt a stepped limiting hole structure, so that the spring pin 112 can be inserted and fixed in the stepped limiting hole. This application does not impose any special restrictions on the specific structure of the fixing part 113. Furthermore, because the gripper 114 is concave relative to the surface of the fixture body 1, after the attenuator 5 under test is tested, fingers can pinch the attenuator 5 at the gripper 114 to quickly remove it, thereby improving the replacement speed of the attenuator 5. For example, when the attenuator 5 under test is a surface-mount attenuator, the gripper 114 allows fingers to quickly pick it up.

[0059] For the tooling body 1, in some embodiments, such as Figure 2 As shown, the fixture body 1 may further include a clamping assembly 12; the clamping assembly 12 may include a bracket 121 and a clamping member 122. The bracket 121 is located at the mounting interface 11 and connected to the fixture body 1. The clamping member 122 is adjustablely connected to the bracket 121 in a direction close to or away from the fixture body 1. The clamping member 122 is used to press the attenuator 5 under test against the mounting interface 11. For example, the clamping member 122 may include a connected handle, a drive mechanism, and a clamping head. The drive mechanism may be a four-bar linkage or a lead screw and nut mechanism. By controlling the handle, the drive mechanism drives the clamping head to press down, thereby pressing the attenuator 5 under test against the spring pin 112. In other embodiments, the clamping member 122 may also be a spring clamping structure. Alternatively, the entire clamping assembly 12 may also be a spring clamping structure. This application does not impose any special restrictions on the specific structure of the clamping assembly 12. In addition, the clamping assembly 12 can be adjusted to be connected to the bracket 121 in a direction close to or away from the tooling body 1 by setting multiple connection holes or lifting structures on the bracket 121, so that the clamping assembly 12 can be used to press the attenuator 5 of different shapes against the spring pin 112.

[0060] Furthermore, in some embodiments, such as Figure 2As shown, the fixture body 1 may include a top cover 131, a base 132, and a side wall 133. The top cover 131, base 132, and side wall 133 are connected to form a box-shaped structure with a receiving cavity 10. An installation interface 11 is located on the upper surface of the top cover 131. The impedance matching component 2 is installed inside the receiving cavity 10. The side wall 133 has a wiring hole 134. The first wire group 3 is located inside the receiving cavity 10 and extends out of the fixture body 1 through the wiring hole 134. Thus, by placing the impedance matching component 2 inside the receiving cavity 10, the fixture body 1 can protect the impedance matching component 2, preventing damage to the impedance matching component 2 during testing and ensuring test accuracy. The top cover 131, base 132, and side wall 133 of the fixture body 1 can be detachably connected by screws, snap-fit ​​connections, or plug-in connections. The fixture body 1 can be made of flexible insulating materials such as rubber, silicone, or plastic. Of course, in other embodiments, the tooling body 1 can also be configured as an I-shaped bracket or other frame structures. This application does not impose any special restrictions on the specific structure and material of the tooling body 1.

[0061] In some embodiments, such as Figure 2 As shown, the side wall 133 has at least two spaced-apart wiring holes 134; the first wire group 3 includes multiple wires 300, which exit the fixture body 1 through different wiring holes 134. In this way, the two sets of first wires 30 in the first wire group 3 can exit the fixture body 1 through different wiring holes 134, preventing short circuits between the two sets of first wires 30. When the testing device adopts a four-wire measurement wiring structure, four spaced-apart wiring holes 134 can be provided on the side wall 133, allowing the four wires 300 to exit the fixture body 1 through different wiring holes 134. This application does not impose any special limitation on the specific number of wiring holes 134 provided on the side wall 133.

[0062] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. An attenuator testing device, characterized in that, include: The fixture body has a mounting interface for mounting the attenuator under test, and the mounting interface is configured to be electrically connected to the first port, the second port and the ground port of the attenuator under test when the attenuator under test is mounted to the mounting interface. An impedance matching component is mounted on the fixture body and electrically connected to the mounting interface. The impedance matching component is electrically connected to the first port and ground port of the attenuator under test (AUT) through the mounting interface to form an impedance network under test. The impedance of the impedance matching component is equivalent to the characteristic impedance of the AUT. The first wire group has its first end electrically connected to the mounting interface, and its first end electrically connected to the second port and ground port of the attenuator under test through the mounting interface. The second end of the first wire group is electrically connected to the detection device, which detects the actual impedance of the impedance network under test.

2. The attenuator testing device as described in claim 1, characterized in that, The attenuator testing device also includes a second wire group; The first end of the second wire group is electrically connected to the mounting interface, and the first end of the second wire group is electrically connected to the first port and the ground port of the attenuator under test through the mounting interface. The second end of the second wire group is electrically connected to the impedance matching component.

3. The attenuator testing device as described in claim 2, characterized in that, The first wire group includes two sets of first wires, the second wire group includes two sets of second wires, and the attenuator under test has a positive mounting state and a reverse mounting state; When the attenuator under test is in the upright position, the first ends of the two sets of first wires are electrically connected to the second port and the ground port of the attenuator under test respectively through the mounting interface, the second ends of the two sets of first wires are electrically connected to the detection device, the first ends of the two sets of second wires are electrically connected to the first port and the ground port of the attenuator under test respectively through the mounting interface, and the second ends of the two sets of second wires are electrically connected to the two ends of the impedance matching component respectively. When the attenuator under test is in reverse installation state, the first ends of the two sets of first wires are electrically connected to the first port and ground port of the attenuator under test respectively through the mounting interface, the second ends of the two sets of first wires are electrically connected to the detection device, the first ends of the two sets of second wires are electrically connected to the second port and ground port of the attenuator under test respectively through the mounting interface, and the second ends of the two sets of second wires are electrically connected to the two ends of the impedance matching component respectively.

4. The attenuator testing device as described in claim 3, characterized in that, The first set of wires includes two wires; The second ends of the four wires in the two sets of the first wires are electrically connected to the four measurement ports of the detection device to form a four-wire measurement wiring structure.

5. The attenuator testing device as described in claim 2, characterized in that, The impedance matching assembly includes a matching resistor and a mounting base; The mounting base is fixedly connected to the tooling body, the matching resistor is detachably connected inside the mounting base, and the second wire group is electrically connected to the matching resistor.

6. The attenuator testing device as described in claim 2, characterized in that, The mounting interface includes a mounting part and a spring pin; The mounting part includes a groove on the tooling body, and a plurality of spring pins are disposed in the groove, corresponding to the first port, the second port and the ground port of the attenuator under test, respectively. The first ends of the first wire group and the second wire group are electrically connected to the spring pins.

7. The attenuator testing apparatus as described in claim 6, characterized in that, The installation interface also includes a fixing part and a gripping part disposed on the tooling body; The fixing part is disposed in the groove, the spring pin is connected to the groove through the fixing part, and the gripper part is disposed at the groove opening and is recessed relative to the surface of the tooling body.

8. The attenuator testing apparatus according to any one of claims 1 to 7, characterized in that, The tooling body also includes a clamping assembly; The clamping assembly includes a bracket and a clamping member. The bracket is located at the mounting interface and connected to the tooling body. The clamping member is adjustablely connected to the bracket in a direction close to or away from the tooling body. The clamping member is used to press the attenuator under test against the mounting interface.

9. The attenuator testing apparatus according to any one of claims 1 to 7, characterized in that, The tooling body includes a top cover, a base, and side walls; The top cover, base, and side wall are connected to form a box-shaped structure with a receiving cavity. The mounting interface is located on the upper surface of the top cover. The impedance matching component is installed in the receiving cavity. The side wall has a wiring hole. The first wire group is located in the receiving cavity and passes through the wiring hole to exit the tooling body.

10. The attenuator testing apparatus as described in claim 9, characterized in that, The sidewall is provided with at least two spaced-apart wiring holes; The first wire group includes multiple wires, each of which exits the tooling body from a different wiring hole.

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