A vector network calibration device

Abstract

The present invention relates to the technical field of vector network calibration, and discloses a vector network calibration device, including a bottom plate, at least one first groove is opened on the top of the bottom plate, three second grooves are opened on the top of the bottom plate with one end of the first groove as the starting point, three third grooves are opened on the top of the bottom plate with the other end of the first groove as the starting point, the cavities opened at the other end of the three second grooves are respectively placed in an open circuit component, a short circuit component and a load component, and the cavities opened at the other end of the three third grooves are respectively embedded with an open circuit component, a short circuit component and a load component. In actual use, two ports of the vector network are respectively connected to two connector components through cables, and the corresponding connecting parts can be moved up and down to make the vector network port connected to the open circuit component, the short circuit component and the load component respectively, or to realize the connection of two vector network ports, and the port calibration of the vector network can be realized through a single connection.

Description

Technical Field

[0001] The invention relates to the technical field of vector network calibration, and in particular to a vector network calibration device. Background Art

[0002] A vector network analyzer (VNA) is an instrument that uses its own excitation signal source, signal separation device, and receiver to measure the characteristic parameters of microwave networks composed of passive and active RF devices and components such as RF microwave devices, cables, connectors, and amplifiers.

[0003] The errors in the vector network during the analysis and testing process are mainly divided into three categories: systematic error, random error and drift error. Among them, the systematic error is caused by the imperfection of the internal test device of the instrument. It is predictable and repeatable. In addition, since the systematic error does not change with time, it can be described quantitatively, so the systematic error can be eliminated by calibration during the test process. Random error is unpredictable because it exists in a random form and changes with time, so it cannot be eliminated by calibration. The main sources of random errors are: internal noise of the instrument (such as: excitation source phase noise, sampling noise, intermediate frequency receiver local oscillator noise, etc.), and the switch action repeatability and connector repeatability of the instrument are also random errors. Drift error is the drift of the performance of the test device after calibration. Drift error is mainly caused by temperature changes and can be eliminated by further calibration. The length of time that the instrument can maintain stable accuracy after calibration depends on the drift speed of the instrument in the test environment.

[0004] In order to ensure the accuracy of the vector network measurement results, the vector network needs to be calibrated. The calibration principle is to measure the calibration device with known parameters, store these measurement results in the analyzer's memory, and use these data to calculate the error model. Then, the error model is used to remove the influence of the system error from subsequent measurements. The calibration process is the process of clarifying the instrument system error by testing the calibration parts. Depending on the calibration parts, the calibration method can be divided into mechanical calibration and electronic calibration. According to the different error terms to be eliminated, mechanical calibration can be divided into frequency response calibration and vector calibration. Among them, vector calibration can be divided into single-port, dual-port, multi-port and TRL calibration.

[0005] For vector calibration, open circuit components, short circuit components, load components and connectors are needed. During calibration, it is necessary to manually connect the open circuit components, short circuit components, load components and connectors to the vector network for testing. The entire test process is slow, and new errors may be introduced due to manual connection operations. Therefore, a device is needed that can support automatic connection of open circuit components, short circuit components, load components and connectors to the vector network. Summary of the invention

[0006] In view of the shortcomings of the background technology, the present invention provides a vector network calibration device that can support the automatic connection of open circuit components, short circuit components, load components and connector components with the vector network, and can be used for single-port calibration and dual-port calibration of the vector network.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a vector network calibration device, comprising a base plate, wherein at least one first groove is opened on the top of the base plate, at least one second groove is opened on the top of the base plate with one end of the first groove as a starting point, and at least one third groove is opened on the top of the base plate with the other end of the first groove as a starting point, and cavities are respectively opened at both ends of the first groove, at both ends of the second groove and at both ends of the third groove along the bottom surface direction of the base plate, and the cavities pass through the base plate.

[0008] In a certain embodiment, connecting devices are respectively provided in the first groove, the second groove and the third groove, and the connecting devices include a radio frequency reed and a push rod.

[0009] In a certain embodiment, a cover plate is further provided on the top of the top plate, and the push rod passes through the cover plate.

[0010] In a certain embodiment, each push rod is also connected to a driving device, and the driving device drives the push rod to move up and down.

[0011] In some embodiments, both ends of the RF reed in the first groove are triangular in shape, one end of the RF reed in the second groove close to the first groove is triangular in shape, and one end of the RF reed in the third groove close to the first groove is triangular in shape.

[0012] In a certain embodiment, three second grooves are opened on the top of the base plate with one end of the first groove as the starting point, wherein two of the second grooves are opened in directions perpendicular to the first groove, and one of the second grooves is opened in a direction parallel to the first groove; three third grooves are opened on the top of the base plate with the other end of the first groove as the starting point, wherein two of the third grooves are opened in directions perpendicular to the first groove, and one of the third grooves is opened in a direction parallel to the first groove.

[0013] In a certain embodiment, an open circuit component, a short circuit component and a load are embedded in the three second grooves respectively, and an open circuit component, a short circuit component and a load component are embedded in the three third grooves respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: since the cavities at both ends of the first groove of the present invention are respectively embedded with connector components, the cavities opened at the other ends of the three second grooves are respectively placed with open circuit components, short circuit components and load components, and the cavities opened at the other ends of the three third grooves are respectively embedded with open circuit components, short circuit components and load components, the two ports of the vector network are respectively connected to the two connector components through cables, and in actual use, the corresponding connecting parts can be moved up and down to make the vector network ports connected to the open circuit component, the short circuit component and the load component respectively, or the connection of two vector network ports can be realized, and the single-port calibration or dual-port calibration of the vector network can be realized through a single connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a bottom plate in an embodiment;

[0016] Figure 2 It is a schematic diagram of the structure of installing radio frequency reeds in the first groove, the second groove and the third groove in the embodiment;

[0017] Figure 3 It is a structural schematic diagram of a connector assembly, an open circuit assembly, a short circuit assembly and a load assembly installed at the bottom of the base plate in the embodiment;

[0018] Figure 4 It is a schematic diagram of the structure of the present invention in an embodiment.

[0019] In the figure: 1, bottom plate, 2, first groove, 3, second groove, 4, third groove, 5, cavity, 6, RF reed, 7, cover plate, 8, push rod, 9, connector assembly, 10, load assembly, 11, open circuit assembly, 12, short circuit assembly. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] like Figure 1 As shown, a vector network calibration device includes a base plate, at least one first groove 2 is opened on the top of the base plate 1, at least one second groove 3 is opened on the top of the base plate 1 with one end of the first groove 2 as the starting point, at least one third groove 4 is opened on the top of the base plate 1 with the other end of the first groove 2 as the starting point, and cavities 5 are respectively opened at both ends of the first groove 2, at both ends of the second groove 3 and at both ends of the third groove 4 along the bottom surface direction of the base plate 1, and the cavity 5 runs through the base plate 1.

[0022] Only one cavity 5 is provided at the common end of the first groove 2 , the second groove 3 and the fourth groove 4 , and the cavity 5 at the common end is used as the cavity 5 at both ends of the first groove 2 .

[0023] In actual use, the cavities 5 at both ends of a first groove 2 can be used to place two connector components 9 of the vector network, and the cavity 5 opened at the end of the second groove 3 away from the first groove 2 and the cavity 5 opened at the end of the third groove 4 away from the first groove 2 can be used to place the load component 10, the open circuit component 11 and the short circuit component 12. Therefore, a vector network can be calibrated and tested through a first groove 2 and at least one second groove 3 and a third groove 4 with the two ends of the first groove 2 as common ends. By opening multiple first grooves 2 on the base plate 1 and opening second grooves 3 and third grooves 4 at both ends of each first groove 2, calibration tests of multiple vector networks can be supported.

[0024] exist Figure 1 In the figure, a first groove 2 is provided on the bottom plate 1 as a schematic diagram, and three second grooves 3 are provided with one end of the first groove 2 as a starting point, two second grooves 3 are provided in directions perpendicular to the first groove 2, and one second groove 3 is provided in a direction parallel to the first groove 2; three third grooves 4 are provided with the other end of the first groove 2 as a starting point, two third grooves 4 are provided in directions perpendicular to the first groove 2, and one third groove 4 is provided in a direction parallel to the first groove 2. In certain embodiments, the second grooves 3 and the third grooves 4 may be provided in other directions.

[0025] Reference Figure 2 , in use Figure 1 When the base plate in the embodiment is installed, the connector assembly 9, the open circuit assembly 11, the short circuit assembly 12 and the load assembly 10 are respectively installed at the bottom of the base plate 1. Specifically, the assemblies at both ends of the first groove 2 are used to place the connector assembly 9, the three second grooves 3 are used to place the load assembly 10, the open circuit assembly 11 and the short circuit assembly 12, and the three third grooves 4 are used to place the load assembly 10, the open circuit assembly 11 and the short circuit assembly 12.

[0026] Reference Figure 3 ,exist Figure 1 In the bottom plate shown in the figure, the first groove 2, the second groove 3 and the third groove 4 are respectively installed with radio frequency reeds 6, and the two ends of the radio frequency reeds 6 extend to the cavity 5 respectively. Each radio frequency reed 6 is provided with a connecting hole for installing Figure 4 In actual use, by driving the push rod 8 to move up and down, the RF spring 6 can be driven to move up and down, and the up and down movement of the RF spring 6 can realize the connection or disconnection of the connector component 9 and the load component 10, the open circuit component 11, the short circuit component 12 or the two connector components 9.

[0027] In addition Figure 3 In the figure, both ends of the RF reed 6 in the first groove 2 are triangular in shape, the end of the RF reed in the second groove 3 close to the first groove 2 is triangular in shape, and the end of the RF reed in the third groove 4 close to the first groove 2 is triangular in shape.

[0028] Reference Figure 4 , a cover plate 7 is also provided on the bottom plate 1, and a push rod 8 passes through the cover plate 7. In actual use, a driving device is provided on the cover plate 7, and the driving device is used to drive the push rod 8 to move up and down, thereby driving the RF reed 6 to move up and down. The driving device can be an electromagnetic driving device.

[0029] In summary, since the cavities 5 at both ends of the first groove 2 of the present invention are respectively embedded with connector components 9, the cavities 5 opened at the other ends of the three second grooves 3 are respectively placed with open circuit components 11, short circuit components 12 and load components 10, and the cavities 5 opened at the other ends of the three third grooves 4 are respectively embedded with open circuit components 11, short circuit components 12 and load components 10, the two ports of the vector network are respectively connected to the two connector components 9 through cables. In actual use, the corresponding connecting parts can be moved up and down to make the vector network ports connected to the open circuit components 11, short circuit components 12, and load components 10 respectively, or the connection of two vector network ports can be realized. The single-port or dual-port calibration of the vector network can be achieved through a single connection.

[0030] The above is based on the present invention as an inspiration. Through the above description, relevant staff can make various changes and modifications without departing from the technical idea of ​​this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A vector network calibration device, characterized in that: The invention comprises a bottom plate, wherein at least one first groove is formed on the top of the bottom plate, at least one second groove is formed on the top of the bottom plate with one end of the first groove as a starting point, at least one third groove is formed on the top of the bottom plate with the other end of the first groove as a starting point, and cavities are formed at both ends of the first groove, both ends of the second groove and both ends of the third groove along the bottom surface of the bottom plate, respectively, and the cavities penetrate the bottom plate; A connecting device is respectively provided in the first groove, the second groove and the third groove, and the connecting device includes a radio frequency reed and a push rod, and the push rod is connected to the radio frequency reed; Each push rod is also connected to a driving device, and the driving device drives the push rod to move up and down; The top of the base plate is provided with three second grooves with one end of the first groove as a starting point, wherein two of the second grooves are opened in directions perpendicular to the first groove, and one of the second grooves is opened in a direction parallel to the first groove; the top of the base plate is provided with three third grooves with the other end of the first groove as a starting point, wherein two of the third grooves are opened in directions perpendicular to the first groove, and one of the third grooves is opened in a direction parallel to the first groove.

2. A vector network calibration device according to claim 1, characterized in that: A cover plate is also provided on the top of the bottom plate, and the push rod passes through the cover plate.

3. A vector network calibration device according to claim 1, characterized in that: Both ends of the RF reed in the first groove are triangular in shape, one end of the RF reed in the second groove close to the first groove is triangular in shape, and one end of the RF reed in the third groove close to the first groove is triangular in shape.

4. A vector network calibration device according to claim 1, characterized in that: An open circuit component, a short circuit component and a load are embedded in the three second grooves respectively, and an open circuit component, a short circuit component and a load component are embedded in the three third grooves respectively.

Images