CN216485173U

CN216485173U - TRL calibrated material electromagnetic parameter test fixture

Info

Publication number: CN216485173U
Application number: CN202123079407.2U
Authority: CN
Inventors: 邵海根; 胡勇; 郑军
Original assignee: Anhui Haitaike Electronic Technology Co ltd
Current assignee: Anhui Haitaike Electronic Technology Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-05-10
Anticipated expiration: 2031-12-09

Abstract

The utility model relates to a technical field of material electromagnetic parameter test discloses a material electromagnetic parameter test fixture of TRL calibration, the material electromagnetic parameter test fixture of TRL calibration includes: the test hollow wire comprises a male adapter, a female adapter and a test hollow wire, wherein the test hollow wire is in adaptive connection with the male adapter and the female adapter; wherein, dispose the spacing space of fixed test sample in the hollow line of test, test sample can carry out spacing fixedly through the dowel. The TRL calibrated material electromagnetic parameter test fixture is more convenient for processing material samples and can effectively reduce test errors.

Description

TRL calibrated material electromagnetic parameter test fixture

Technical Field

The utility model relates to a technical field of material electromagnetic parameter test, in particular to material electromagnetic parameter test anchor clamps of TRL calibration.

Background

With the development of material science, microwave engineering and electromagnetic compatibility technology, the functions of wave-transmitting materials and wave-absorbing materials become very obvious. In design and use, the electromagnetic parameters of the material have a large influence on the performance of the device, and therefore, the measurement technology of the electromagnetic parameters becomes more important.

At present, the electromagnetic parameter measurement methods commonly used at home and abroad include a resonant cavity method, a free space method, an open-circuit terminal coaxial line method, a transmission line method and the like. Among them, the "Transmission/Reflection method" (Transmission/Reflection Coefficients, i.e., scattering parameters) is widely used, and is abbreviated as TR method. Because it has the characteristics of wide measuring frequency band, high measuring precision, suitability for coaxial and waveguide systems, simplicity, easiness in operation and the like.

The TR method is used to measure electromagnetic parameters of a material, requiring the use of a test fixture to place a sample of the material. At present, a common test fixture for a TR method is a 7mm coaxial air line, and two ends of the air line are provided with N-type connectors which can be connected with N-type radio frequency cables.

The existing TR method test fixture has the following defects: the 7mm coaxial air line has an outer diameter of 7mm and an inner diameter of 3mm, and such a size is too small, so that the processing of the material sample is inconvenient. In addition, the standard 7mm air line cannot position the material sample, that is, there is a risk of sliding and shifting when the material sample is placed in the air line, and once the position of the sample is changed during the test, a large error is generated in the test of the electromagnetic parameters.

SUMMERY OF THE UTILITY MODEL

The utility model provides a material electromagnetic parameter test fixture of TRL calibration, this material electromagnetic parameter test fixture of TRL calibration be convenient for more the material sample processing, can effectively reduce the test error.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model also provides a material electromagnetic parameter test fixture of TRL calibration, material electromagnetic parameter test fixture of TRL calibration includes: the test hollow wire comprises a male adapter, a female adapter and a test hollow wire, wherein the test hollow wire is in adaptive connection with the male adapter and the female adapter; wherein, dispose the spacing space of fixed test sample in the hollow line of test, test sample can carry out spacing fixedly through the dowel.

Preferably, the test sample is configured in the shape of a cylindrical ring;

and, the test hollow wire includes:

the first end is provided with a hollow wire jack connected with the end where the male pin of the adapter male connector is located, the second end is provided with a hollow wire jack connected with the end where the female pin of the adapter female connector is located, and the base body section is arranged between the first end and the second end; wherein, be formed with the spacing space of fixed test sample in the base member section, and the dowel pin can run through the base member section and support the test sample that is in spacing space.

Preferably, the male adaptor comprises, connected in sequence: the first N-shaped female head, the first conical reducing section connected with the first N-shaped female head and the male nut section in threaded connection with the first end are arranged on the first N-shaped female head; wherein the male pin is configured in the male nut section.

Preferably, the interior of the adapter male connector is further provided with a first polytetrafluoroethylene support for limiting the positions of the male contact pin and the first N-type female connector.

Preferably, the female adaptor comprises, connected in sequence: the second N-shaped female head, a second taper diameter-changing section connected with the second N-shaped female head and a female nut section in threaded connection with the second end are arranged on the female nut section; wherein the female receptacle is configured in the female nut section.

Preferably, the interior of the adapter female connector is further provided with a second teflon support limiting the positions of the female jack and the second N-type female connector.

Preferably, the test hollow wire has an outer diameter of 16mm, an inner diameter of 7mm, and a length of 40 mm.

Compared with the prior art, the utility model discloses place test sample at the central authorities of test air line, test sample fills up the test air in-line, uses the position of locating pin can fixed test sample in test air line. After the test sample is loaded, one end of the test air line is connected with the switching male connector, and the other end of the test air line is connected with the switching female connector. In the process of testing the material, the test fixture is connected with a vector network analyzer through an N-type cable, the vector network analyzer conducts de-embedding processing on the adapter male joint and the adapter female joint through calibration data, and then the electromagnetic parameters of the material of the test sample are calculated.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural sectional view of a TRL calibrated material electromagnetic parameter test fixture according to the present invention;

FIG. 2 is a schematic structural view of the adapter male of FIG. 1; and

fig. 3 is a schematic structural view of the female adaptor shown in fig. 1.

Description of reference numerals:

1. testing the sample; 2. a first N-type female head; 3. a first tapered reducer section; 4. a positive nut segment; 5. inserting a positive pin; 6. a first polytetrafluoroethylene support; 7. a second N-type female head; 8. a second taper diameter section; 9. a negative nut segment; 10. a female jack; 11. a second polytetrafluoroethylene support; 12. testing the hollow wire; 13. positioning pins; 14. a first end; 15. a second end; 16. a base section.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and right as illustrated with reference to the accompanying drawings; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 is the utility model discloses a material electromagnetic parameter test fixture's of TRL calibration structural schematic diagram, as shown in fig. 1, material electromagnetic parameter test fixture of TRL calibration includes: the test device comprises a male adapter, a female adapter and a test hollow wire 12 which is in adaptive connection with the male adapter and the female adapter; wherein, dispose the spacing space of fixed test sample 1 in the hollow line 12 of test, test sample 1 can carry out spacing fixedly through locating pin 13 nail. After the public head of switching and the female head of switching accomplished TRL calibration, just can use the utility model discloses a test fixture carries out the test of material sample, and the test structure is shown in figure 1. A test sample 1 is placed in the center of the test air line, the sample is in the shape of a cylindrical ring, the sample fills the gap between the inner conductor and the outer conductor of the air line, and the position of the sample in the test air line can be fixed by using a positioning pin 13. After the test sample 1 is loaded, one end of the test air line is connected with the switching male connector, and the other end of the test air line is connected with the switching female connector. In the process of testing the material sample, the test fixture is connected with the vector network analyzer through the N-type cable. And testing the S parameter of the clamp by using the vector network analyzer, de-embedding the adapter male joint and the adapter female joint by using the calibration data, and then calculating the electromagnetic parameter of the material by using a TR algorithm.

Preferably, the test sample 1 is configured in the shape of a cylindrical ring;

also, as shown in fig. 1, the test hollow wire 12 may include:

a first end 14 where a hollow wire jack connected with the end where the male pin 5 of the male adaptor is located, a second end 15 where a hollow wire pin connected with the end where the female jack 10 of the female adaptor is located, and a base section 16 arranged between the first end 14 and the second end 15; wherein a spacing space for fixing the test sample 1 is formed in the base body section 16, and the positioning pin 13 can penetrate through the base body section 16 to abut against the test sample 1 in the spacing space.

Preferably, the adapter male connector may include: a first N-type female head 2, a first tapered reducer section 3 connected with the first N-type female head 2, and a male nut section 4 in threaded connection with the first end 14; wherein the male pin 5 is configured in the male nut section 4.

Preferably, the inside of the adapter male connector is further provided with a first teflon support 6 for limiting the positions of the male pin 5 and the first N-type female connector 2.

The structure of the adapter male is shown in fig. 2. One end of the adapter male connector is provided with a first N-type female connector 2 which is used for connecting with an N-type connector. The other end of the adapter male connector is provided with a test air line (a male nut section 4) with the outer diameter D and the inner diameter D, the test air line is connected with the test air line, and the connecting nut and the male contact pin 5 are used for achieving good electric contact of the adapter male connector and an inner conductor and an outer conductor of the test air line. The change in size from the N-head to the air line is achieved by a conical taper (first conical taper section 3). The first PTFE support is used for ensuring the position relation of the inner conductor and the outer conductor of the connector.

Preferably, the female adaptor may include: a second N-shaped female head 7, a second taper diameter-changing section 8 connected with the second N-shaped female head 7, and a female nut section 9 in threaded connection with the second end 15; wherein the female receptacle 10 is configured in the female nut section 9.

Preferably, the interior of the female adapter is further provided with a second teflon support 11 for limiting the positions of the female jack 10 and the second N-type female adapter 7.

The structure of the adapter is shown in fig. 3. One end of the second adapter female is provided with a second N-type female 7 for connecting with an N-type. The other end of the second adapter female joint is an air line (a female nut section 9) with the outer diameter D and the inner diameter D and used for being connected with a test air line, and the connecting screw and the female jack 10 are used for achieving good electric contact between the second adapter female joint and inner and outer conductors of the test air line. The change in size from the N-head to the air line is achieved by a tapered taper (second tapered section 8). The second PTFE support is used to ensure the positional relationship between the inner and outer conductors of the contact.

Preferably, the test hollow wire 12 has an outer diameter of 16mm, an inner diameter of 7mm and a length of 40 mm.

The utility model discloses a theory of operation is as follows, the utility model discloses a test fixture fixes a position test sample 1 after carrying out the TRL calibration, and conveniently is connected with vector network analyzer, and vector network analyzer test fixture' S S parameter utilizes calibration data to go the embedding processing to the public head of switching and the female head of switching, then recycles the electromagnetic parameter that TR algorithm calculated the material.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A TRL calibrated material electromagnetic parameter test fixture, comprising: the test device comprises a male adapter, a female adapter and a test hollow wire (12) which is in adaptive connection with the male adapter and the female adapter; wherein, dispose the spacing space of fixed test sample (1) in the hollow line of test (12), test sample (1) can carry out spacing fixedly through locating pin (13).

2. The TRL-calibrated material electromagnetic parameter test fixture according to claim 1, characterized in that the test specimen (1) is configured in the shape of a cylindrical ring;

and, the test hollow wire (12) comprises:

a first end (14) where a hollow wire jack is located and connected with an end where a male pin (5) of the adapter male connector is located, a second end (15) where a hollow wire jack is located and connected with an end where a female jack (10) of the adapter female connector is located, and a base body section (16) arranged between the first end (14) and the second end (15); wherein a spacing space for fixing the test sample (1) is formed in the base body section (16), and the positioning pin (13) can penetrate through the base body section (16) to abut against the test sample (1) in the spacing space.

3. The TRL calibrated material electromagnetic parameter test fixture of claim 2, wherein the adaptor male comprises, connected in series: a first N-shaped female head (2), a first tapered reducer section (3) connected with the first N-shaped female head (2), and a male nut section (4) in threaded connection with the first end (14); wherein the male pin (5) is arranged in the male nut section (4).

4. The TRL calibrated material electromagnetic parameter test fixture according to claim 3, characterized in that the interior of said adaptor male is further configured with a first teflon support (6) limiting the position of said male pin (5) and said first N-type female head (2).

5. The TRL calibrated material electromagnetic parameter test fixture of claim 3, wherein the adapter female comprises, connected in series: a second N-shaped female head (7), a second taper diameter-changing section (8) connected with the second N-shaped female head (7), and a female nut section (9) in threaded connection with the second end (15); wherein the female receptacle (10) is configured in the female nut section (9).

6. The TRL calibrated material electromagnetic parameter test fixture according to claim 5, wherein the interior of said adaptor female is further configured with a second teflon support (11) limiting the position of said female receptacle (10) and said second N-type female (7).

7. The TRL calibrated material electromagnetic parameter test fixture according to claim 1, characterized in that the test hollow wire (12) has an outer diameter of 16mm, an inner diameter of 7mm and a length of 40 mm.