CN115825493A - Connector high-frequency performance testing device and testing method - Google Patents
Connector high-frequency performance testing device and testing method Download PDFInfo
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- CN115825493A CN115825493A CN202211516745.4A CN202211516745A CN115825493A CN 115825493 A CN115825493 A CN 115825493A CN 202211516745 A CN202211516745 A CN 202211516745A CN 115825493 A CN115825493 A CN 115825493A
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Abstract
The embodiment of this description provides a connector high frequency performance testing arrangement, includes: the high-frequency testing tool is of a switching structure and is used for being coaxially connected with the connecting end of the coaxial wiring connector to be tested, the high-frequency characteristics of the high-frequency testing tool and the high-frequency characteristics of the coaxial wiring connector to be tested are the same, and when the high-frequency testing tool is connected with the coaxial wiring connector to be tested, the high-frequency testing tool and the coaxial wiring connector to be tested are symmetrical about the connecting position; the vector network analyzer is used for sending high-frequency test signals to the coaxial connecting line connector to be tested through the first high-frequency signal line and receiving the high-frequency test signals forwarded by the high-frequency test tool from the coaxial connecting line connector to be tested through the second high-frequency signal line. Through the high-frequency test frock of butt joint, the high frequency performance of simple effectual test coaxial cable connector.
Description
Technical Field
The specification relates to the technical field of semiconductors, in particular to a connector high-frequency performance testing device and a testing method.
Background
Coaxial connectors are a common microwave component and one of the most basic components of microwave electronic device interconnections. Along with the miniaturization trend of the current complete machine system, the radio frequency coaxial connector and the radio frequency coaxial adapter are developed towards the trend of miniaturization and high frequency, and meanwhile, the requirement on high frequency performance testing is higher and higher, so that the high frequency performance testing tool for the small-interface coaxial connector is designed.
For the test of coaxial wiring connector, because the afterbody is wiring structure, can't directly be connected with test equipment such as vector network analyzer, adopt the test after the wiring and estimate usually, the test result can't accurate positioning connector self high frequency characteristic.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide a connector high-frequency performance testing apparatus and a testing method, so as to achieve the purpose of obtaining a high-frequency performance index of a coaxial cable connector to be tested through theoretical calculation.
The embodiment of the specification provides the following technical scheme:
a connector high frequency performance testing apparatus, comprising:
the high-frequency testing tool is of a switching structure and is used for being coaxially connected with the connecting end of the coaxial connecting line connector to be tested, wherein the high-frequency testing tool and the coaxial connecting line connector to be tested have the same high-frequency characteristics, and when the high-frequency testing tool is connected with the coaxial connecting line connector to be tested, the high-frequency testing tool and the coaxial connecting line connector to be tested are symmetrical about the connecting position;
the vector network analyzer is used for sending a high-frequency test signal to the coaxial cable connector to be tested through the first high-frequency signal line and receiving the high-frequency test signal forwarded by the high-frequency test tool from the coaxial cable connector to be tested through the second high-frequency signal line.
Further, high frequency test fixture includes:
an outer housing;
the outer shell and the inner shell are fixed with each other through interference fit;
an insulator fixed between the outer case and the inner case;
the inner inserting core is fixed inside the insulator, and the high-frequency test tool is coaxially connected with the connecting end of the coaxial connector to be tested through the inner inserting core.
Furthermore, annular grooves are formed in two sides of the insulator to form impedance transition compensation, and the inner inserting core is fixed and supported through the annular grooves.
Furthermore, the inner shell and the outer shell are made of tin bronze gold-plated materials.
Further, the insulator is made of polyetherimide.
Further, the inner inserting core is made of beryllium bronze.
Further, the tail part of the high-frequency test tool, which is used for being connected with the connecting end of the coaxial connector to be tested, is in a pin form.
And further, the vector network analyzer is also used for calculating the voltage standing wave ratio and the insertion loss of the coaxial cable connector to be tested through the received high-frequency test signal.
Further, the testing method of the connector high-frequency performance testing device comprises the following steps:
sending a high-frequency test signal to a coaxial wiring connector to be tested through a vector network analyzer;
transferring the high-frequency test signal to a high-frequency test tool through a coaxial wiring connector to be tested;
sending the high-frequency test signal to a vector network analyzer through a high-frequency test tool;
and calculating the high-frequency characteristic parameters of the coaxial cable connector to be tested according to the received high-frequency test signals through a vector network analyzer.
Further, the method for calculating the high-frequency characteristic parameters of the coaxial cable connector to be tested according to the received high-frequency test signals through the vector network analyzer comprises the following steps:
the high-frequency testing tool and the coaxial connector to be tested form a symmetrical structure when connected, the impedance of the connection part of the high-frequency testing tool and the coaxial connector to be tested is consistent, the insertion loss of the symmetrical structure is determined according to the received high-frequency testing signal, and the insertion loss of the coaxial connector to be tested is calculated according to the insertion loss of the symmetrical structure.
Compared with the prior art, the beneficial effects that can be achieved by the at least one technical scheme adopted by the embodiment of the specification at least comprise:
the high-frequency performance testing tool for the 2.92mm interface coaxial connector is designed, the testing tool can be directly butted with the 2.92mm interface coaxial connector to form an approximately symmetrical coaxial structure, the two ends of the testing tool are 2.92mm coaxial interfaces, and the testing tool can be directly connected with high-frequency instruments such as a vector network analyzer and the like for testing.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a high-frequency performance testing apparatus of a connector according to an embodiment of the present invention;
FIG. 2 is a perspective view of a high-frequency performance testing apparatus of a connector according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a connection structure of a test method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an inner housing of the high-frequency testing tool according to the embodiment of the invention;
fig. 5 is a schematic structural diagram of an outer shell of the high-frequency test tool according to the embodiment of the invention;
FIG. 6 is a schematic structural diagram of an insulator of the high-frequency testing tool according to the embodiment of the invention;
FIG. 7 is a schematic structural diagram of an inner ferrule of the high-frequency testing tool according to the embodiment of the invention;
FIG. 8 is a cross-sectional view of the high frequency test fixture and coaxial cable connector under test during butt-joint test;
fig. 9 is an axial schematic view of the connector high-frequency performance testing apparatus and the coaxial wiring connector to be tested in the butt test.
Description of reference numerals: 1. an outer housing; 2. an inner housing; 3. an insulator; 4. an inner ferrule; 5. a high-frequency test tool; 6. coaxial cable connector to be tested.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following embodiments of the present application are described by specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number and aspects set forth herein. In addition, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to or other than one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The high-frequency performance testing tool for the small-interface coaxial connector is designed, the testing tool can be directly butted with the small-interface coaxial connector to form an approximately symmetrical coaxial structure, the two ends of the testing tool are small interfaces, the testing tool can be directly connected with high frequency such as a vector network analyzer and the like for testing, the tested voltage standing wave ratio and insertion loss can be calculated after testing, and the high-frequency characteristic parameters of a single connector are obtained.
The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, a high-frequency test fixture 5 for high-frequency performance of a 2.92mm interface wiring radio frequency coaxial connector is designed, wherein the high-frequency test fixture 5 comprises a rear shell, a front shell, an insulator and an inner inserting core, the outer shell and the inner shell are fixed with each other through interference fit, the insulator 3 is fixed between the outer shell 1 and the inner shell 2, and the inner inserting core 4 is fixed inside the insulator 3 through a clamping groove insulator, so that fixation among all parts inside the high-frequency test fixture 5 is ensured. The switching structure composed of the insulator and the inner insertion core of the high-frequency test tool 5 can be switched with the coaxial connector 6 to be tested, a symmetrical structure is formed when the high-frequency test tool 5 is connected with the coaxial connector 6 to be tested, and the impedance of the high-frequency test tool 5 is consistent with that of the coaxial connector 6 to be tested (the symmetrical structure can directly calculate the voltage standing wave ratio and the insertion loss of the coaxial connector 6 to be tested).
Referring to fig. 3, the inner housing 2 is made of tin bronze gold-plated material, and the size of the 2.92mm interface is ensured inside the inner housing, and meanwhile, the inner housing is matched with the inserted core to ensure the consistency of impedance.
As shown in fig. 4, the outer shell 1 is made of tin bronze gold-plated material, and the outer shell 1 and the inner shell 2 are matched with the inner insertion core 4 on the basis of interference fit, so as to ensure the consistency of impedance.
As shown in fig. 5, the insulator 3 is made of polyetherimide material, and annular grooves are dug on two sides to compensate impedance transition and provide support.
As shown in fig. 6, the inner plug 4 is made of beryllium bronze and ensures the impedance matching size with the housing, and the tail part is in the form of a pin to ensure the connection matching with the tail part wiring position of the 2.92mm interface wiring coaxial connector.
As shown in fig. 7 and 8, the tail of the high-frequency test fixture is butted with the tail of the 2.92mm interface wiring connector to realize approximately symmetrical connection, so that the insertion loss and the voltage standing wave ratio of the coaxial wiring connector 6 to be tested are obtained through calculation.
The testing method using the connector high-frequency performance testing device comprises the following steps:
and S01, connecting all the parts.
S011, connecting the coaxial cable connector 6 to be tested with the tail of the corresponding high-frequency test tool 5, and fixing to form a symmetrical switching structure;
s012, calibrating the vector network analyzer by adopting a conventional calibration method (such as SOLT), requiring the first high-frequency signal line and the second high-frequency signal line to be symmetrical, and calibrating the test plane to two ends of the test line of the vector network analyzer;
s013, connecting two ends of the coaxial connector 6 to be tested and the high-frequency test tool 5 of the formed symmetrical switching structure with two high-frequency signal lines of a vector network analyzer to form a microwave test loop;
and S02, sending a test high-frequency signal.
S021, sending a high-frequency test signal to a coaxial wiring connector to be tested through a vector network analyzer;
s022, transferring the high-frequency test signal to a high-frequency test tool through a coaxial wiring connector to be tested;
s023, sending the high-frequency test signal to the vector network analyzer through the high-frequency test tool.
And S03, calculating the high-frequency characteristic parameters of the coaxial cable connector to be tested.
S031, calculating the high-frequency characteristic parameters of the coaxial wiring connector to be tested according to the received high-frequency test signals through a vector network analyzer;
s032, forming a symmetrical structure when the high-frequency test fixture is connected with the coaxial connecting line connector to be tested, determining the return loss RL of the symmetrical structure according to the received high-frequency test signal, and then determining the return loss RL according to a formula ， 
And according to the VSWR of symmetrical structure Double is And calculating the voltage standing wave ratio VSWR of the coaxial cable connector to be tested Sheet ；
Specifically, VSWR Sheet The voltage standing wave ratio of the tested connector is obtained;
VSWR double is The voltage standing wave ratio is directly measured after butt joint;
s033, determining the insertion loss of the symmetrical structure according to the received high-frequency test signal, and calculating the insertion loss of the coaxial wiring connector to be tested according to the insertion loss of the symmetrical structure;
in particular, IL Sheet The insertion loss of the tested connector;
IL double is The insertion loss is directly measured after butt joint;
insertion loss IL Sheet ＝IL Double is /2。
And S04, judging whether the coaxial connector to be tested meets the requirements or not according to the high-frequency characteristic parameters of the coaxial connector to be tested.
The condition for judging whether the insertion loss of the coaxial cable connector meets the technology is the IL Sheet Is less than 0.3dB.
The VSWR is used for judging whether the voltage standing wave ratio of the coaxial cable connector meets the technical requirement Sheet Less than 1.2.
For the overall test parameters of the connector, because the voltage standing wave ratio has larger influence on the performance of the product, and the comprehensive performance of the two parameters of the product can meet the actual use requirements, the weighted evaluation of the comprehensive performance can be carried out, the evaluation coefficient is set as P,
P＝((|IL sheet |-1)×0.3+VSWR Sheet ×0.7)，
And judging whether the evaluation coefficient of the coaxial connector meets the technical requirement or not, wherein the condition that the P is less than 0.2 is adopted.
The embodiment of the invention has the following beneficial effects:
the high-frequency performance testing tool for the 2.92mm interface coaxial connector is designed, the testing tool can be directly butted with the 2.92mm interface coaxial connector to form an approximately symmetrical coaxial structure, the two ends of the testing tool are 2.92mm coaxial interfaces, and high-frequency connection testing can be directly performed with a vector network analyzer and the like. After the test, the measured voltage standing wave ratio and the insertion loss can be calculated to obtain the high-frequency characteristic parameters of the single connector. The switching structure of the high-frequency test tool is designed in a coaxial switching mode through direct contact pin butt joint, and the influence of a cable introduced in the switching process on test indexes is avoided. The high-frequency test tool and the coaxial connector to be tested form approximate symmetrical structures at two sides, so that high-frequency performance indexes of the coaxial connector to be tested can be obtained through theoretical calculation, and the problem that the coaxial connector is difficult to calibrate in high-frequency test due to the problem of a wiring form is solved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is simple, and for relevant points, reference may be made to the partial description of the system embodiments.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A connector high frequency performance testing apparatus, comprising:
the high-frequency testing tool (5) is of a switching structure and is used for being coaxially connected with a connecting end of a coaxial wiring connector to be tested, wherein the high-frequency characteristics of the high-frequency testing tool (5) and the high-frequency characteristics of the coaxial wiring connector (6) to be tested are the same, and when the high-frequency testing tool (5) is connected with the coaxial wiring connector (6) to be tested, the high-frequency testing tool (5) and the coaxial wiring connector (6) to be tested are symmetrical about the connecting position;
the vector network analyzer is characterized by comprising a vector network analyzer, wherein a first high-frequency signal line of the vector network analyzer is connected with a coaxial wiring connector (6) to be tested, a second high-frequency signal line of the vector network analyzer is connected with a high-frequency testing tool (5), the vector network analyzer is used for sending a high-frequency testing signal to the coaxial wiring connector (6) to be tested through the first high-frequency signal line and receiving the high-frequency testing signal forwarded by the high-frequency testing tool (5) from the coaxial wiring connector (6) to be tested through the second high-frequency signal line.
2. The high-frequency performance testing device of the connector according to claim 1, wherein the high-frequency testing tool (5) comprises:
an outer casing (1);
the outer shell (1) and the inner shell (2) are fixed with each other through interference fit;
the insulator (3), the insulator (3) is fixed between outer shell (1) and inner shell (2);
the high-frequency test device comprises an inner inserting core (4), wherein the inner inserting core (4) is fixed inside an insulator (3) through a clamping groove insulator, and the connecting end of a high-frequency test tool (5) and a coaxial connector (6) to be tested is coaxially connected through the inner inserting core (4).
3. The high-frequency performance testing device of the connector according to claim 2, wherein annular grooves are formed at both sides of the insulator (3) to form impedance transition compensation, and the inner ferrule (4) is fixed and supported by the annular grooves.
4. The high frequency performance testing apparatus of claim 2, wherein the inner housing and the outer housing are made of tin bronze gold plating.
5. The apparatus for testing high frequency performance of a connector according to claim 2, wherein the insulator is made of polyetherimide.
6. The high-frequency performance testing device of the connector according to claim 2, wherein the inner ferrule is made of beryllium bronze.
7. The high-frequency performance testing device for the connector according to any one of claims 1 to 6, wherein tail portions of the high-frequency testing tool, which are used for being connected with the connecting ends of the coaxial cable connector to be tested, are in the form of pins.
8. The high-frequency performance testing device of connectors according to any one of claims 1 to 6, wherein the vector network analyzer is further configured to calculate a voltage standing wave ratio and an insertion loss of the coaxial cable connector under test according to the received high-frequency test signal.
9. A testing method based on the connector high-frequency performance testing device of any one of claims 1 to 8, characterized by comprising the following steps:
sending a high-frequency test signal to the coaxial cable connector to be tested through the vector network analyzer;
transferring the high-frequency test signal to the high-frequency test tool through the coaxial wiring connector to be tested;
sending the high-frequency test signal to the vector network analyzer through the high-frequency test tool;
and calculating the high-frequency characteristic parameters of the coaxial connector to be tested according to the received high-frequency test signal by the vector network analyzer.
10. The method according to claim 9, wherein calculating the high frequency characteristic parameters of the coaxial cable connector to be tested by the vector network analyzer according to the received high frequency test signal comprises:
when the high-frequency test tool is connected with the coaxial cable connector to be tested, a symmetrical structure is formed, the impedance of the connection part of the high-frequency test tool and the coaxial cable connector to be tested is consistent, the voltage standing wave ratio of the symmetrical structure is determined according to the received high-frequency test signal, and the voltage standing wave ratio of the coaxial cable connector to be tested is calculated according to the voltage standing wave ratio of the symmetrical structure;
and determining the insertion loss of the symmetrical structure according to the received high-frequency test signal, and calculating the insertion loss of the coaxial connector to be tested according to the insertion loss of the symmetrical structure.
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| CN202211516745.4A CN115825493A (en) | 2022-11-29 | 2022-11-29 | Connector high-frequency performance testing device and testing method |
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