CN116859135B - Communication contrast test system suitable for wireless product - Google Patents
Communication contrast test system suitable for wireless product Download PDFInfo
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- CN116859135B CN116859135B CN202311109324.4A CN202311109324A CN116859135B CN 116859135 B CN116859135 B CN 116859135B CN 202311109324 A CN202311109324 A CN 202311109324A CN 116859135 B CN116859135 B CN 116859135B
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- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 238000004891 communication Methods 0.000 title claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 17
- 229920001821 foam rubber Polymers 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 13
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011358 absorbing material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0821—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning rooms and test sites therefor, e.g. anechoic chambers, open field sites or TEM cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0807—Measuring electromagnetic field characteristics characterised by the application
- G01R29/0814—Field measurements related to measuring influence on or from apparatus, components or humans, e.g. in ESD, EMI, EMC, EMP testing, measuring radiation leakage; detecting presence of micro- or radiowave emitters; dosimetry; testing shielding; measurements related to lightning
- G01R29/0835—Testing shielding, e.g. for efficiency
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to the technical field of electromagnetic testing, in particular to a communication contrast testing system suitable for wireless products, which comprises a shielding chamber, wherein a partition wall for separating two turntables and an antenna is arranged in the shielding chamber, the partition wall is provided with two testing cavities, a numerical control turntable for driving the two turntables to horizontally rotate is arranged in the shielding chamber, a flat plate is fixedly arranged at the bottom of the turntables, a plugging block is fixedly arranged on the flat plate, and a linear module for driving the turntables and the plugging block to enter the testing cavities is arranged in the shielding chamber; the shielding chamber and the partition wall are both fixedly provided with special-shaped sponge cones, the upper surfaces of the special-shaped sponge cones are conical convex surfaces arched upwards, and the conical convex surfaces are provided with ox horn-shaped grooves for continuously reflecting signals. According to the invention, through the two independent test cavities, wireless products on the two turntables are sequentially and independently measured, so that the measurement noise is reduced, the dust thickness is reduced through the special-shaped sponge cone, and the absorption of the special-shaped sponge cone to electromagnetic waves is improved.
Description
Technical Field
The invention relates to the technical field of electromagnetic testing, in particular to a communication contrast testing system suitable for wireless products.
Background
The wireless product needs to be tested in research and production, and the communication performance of the wireless product and the antenna is an important index of the wireless product. Anechoic chambers are closed shielded chambers for radiation radio disturbance (EMI) and radiation sensitivity (EMS) measurements, whose main constituent structures are mainly shielded chambers and wave absorbing materials.
At present, the anechoic chamber can only carry out electromagnetic compatibility measurement of a single sample, and efficiency is lower, in addition, when the sample is replaced, the anechoic chamber needs to be accessed, and dust is easy to enter the anechoic chamber due to frequent access of personnel, so that the testing environment is changed.
The wave absorbing materials commonly used in anechoic chambers are mainly wave absorbing pyramids, and the wave absorbing pyramids are generally made of organic polymer materials such as silica gel, chloroprene rubber, polyurethane and the like, and the materials have higher electromagnetic wave absorbing performance. The preparation process of the wave-absorbing pyramid is to add various wave-absorbing agents and auxiliary agents into the materials, and then to prepare a cone-shaped structure through the technological processes of extrusion, mixing, foaming and the like. When the wave-absorbing pyramid is disposed on the inner wall of the shielding chamber, the upper surface of the wave-absorbing pyramid is liable to adhere and accumulate dust, resulting in a decrease in the efficiency of the wave-absorbing pyramid in absorbing electromagnetic waves.
Disclosure of Invention
The present invention is directed to a communication contrast test system for wireless products, so as to solve the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a communication contrast test system suitable for wireless product, includes the shield room, the ground and the ceiling of shield room are all fixed to be equipped with the wave absorbing pyramid, be equipped with in the shield room and be used for placing the carousel of wireless product, be used for receiving the antenna that comes from wireless product signal, and drive the linear sliding table of antenna back-and-forth movement, the slider end of linear sliding table is fixed to be equipped with the drive the linear module that the antenna left and right moved, be equipped with in the shield room and separate carousel and the partition wall of antenna, the partition wall runs through in front and back and is equipped with two test chamber, two test chamber is left and right sides interval setting, the carousel is equipped with two the carousel horizontal rotation of drive, two the carousel is central symmetry setting about the rotation center of numerical control carousel, the bottom of carousel is fixed to be equipped with the flat board, the flat board keep away from the tip of carousel is fixed to be equipped with the shutoff piece that the test chamber coincide, be equipped with the drive carousel and shutoff piece get into the straight line module in the test chamber;
the shielding room is characterized in that a plurality of special-shaped sponge cones are fixedly arranged on the inner side wall of the shielding room and the side wall of the partition wall, the upper surface of each special-shaped sponge cone is a conical convex surface arched upwards, the lower surface of each special-shaped sponge cone is a conical concave surface matched with the conical convex surface, and the conical convex surface is provided with a ox horn-shaped groove for continuously reflecting signals.
Optionally, the slider end of straight line module with the casing bottom fixed connection of numerical control revolving stage, the rotation end fixedly connected with two cantilevers of numerical control revolving stage, the cantilever keep away from the tip of numerical control revolving stage with dull and stereotyped fixed connection.
Optionally, the test cavity is rectangular frame structure, the test cavity is formed by the concatenation of polyurethane wave-absorbing plate, the shutoff piece is the wave-absorbing silicone rubber material.
Optionally, the surface fixing that its pointed end was kept away from to abnormal shape sponge awl is equipped with the rectangle foam-rubber cushion, the rectangle foam-rubber cushion respectively with the shield room with partition wall passes through bolt fixed connection, the rectangle foam-rubber cushion is fixed to be equipped with nine abnormal shape sponge awls, nine abnormal shape sponge awl is 3 x 3 matrix closely distributed.
Optionally, the left side wall and the right side wall of abnormal shape sponge awl are to ox horn shape groove direction slope's triangle face, ox horn shape groove is equipped with a plurality of, and a plurality of ox horn shape groove is control parallel arrangement.
Optionally, the ox horn groove is by locating rectangular mouth on the circular cone convex surface, locates the rectangular mouth front end and to keeping away from the sunken minor arc section of circular cone convex surface direction, and locate the rectangular mouth rear end and to keeping away from the sunken major arc section of circular cone convex surface direction encloses in proper order and closes and form, the radius of minor arc section is less than the radius of major arc section.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the two independent test cavities, wireless products on the two turntables are sequentially and independently measured, so that the change of a test environment caused by the entrance and exit of personnel into and from the shielding chamber is avoided, a purer shielding chamber is created, a more accurate and stable test result can be obtained, the dust thickness is reduced through the special-shaped sponge cone, the absorption of the special-shaped sponge cone to electromagnetic waves is improved, and the electromagnetic shielding effect of the system is improved;
2. according to the invention, by designing the conical concave surface, two special-shaped sponge cones which are arranged up and down can be tightly meshed, gaps between the upper special-shaped sponge cones and the lower special-shaped sponge cones are avoided, and the electromagnetic wave absorption effect is improved;
3. the invention can continuously absorb and reflect electromagnetic waves through the ox horn-shaped groove, greatly improve the electromagnetic wave absorption effect of the special-shaped sponge cone, temporarily store dust through the ox horn-shaped groove, reduce dust floating and improve the electromagnetic wave absorption of the special-shaped sponge cone.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the rectangular foam-rubber cushion and the special-shaped foam-rubber cone according to the present invention;
fig. 3 is a schematic structural view of the special-shaped sponge cone in the invention.
In the figure: 1. a shielding chamber; 2. a turntable; 3. an antenna; 4. a linear sliding table; 5. a linear module; 6. partition walls; 7. a test chamber; 8. a block; 9. a flat plate; 10. a numerical control rotary table; 11. a linear module; 12. a cantilever; 13. a special-shaped sponge cone; 14. conical convex surface; 15. a conical concave surface; 16. triangular surfaces; 17. ox horn shaped groove; 18. a rectangular opening; 19. a small arc section; 20. a large arc section; 21. rectangular sponge cushion.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples: referring to fig. 1, the invention provides a communication contrast test system suitable for wireless products, which comprises a shielding chamber 1, wherein wave absorbing pyramids are fixedly arranged on the ground and the ceiling of the shielding chamber 1, a turntable 2 for placing the wireless products is arranged in the shielding chamber 1, an antenna 3 for receiving signals from the wireless products, and a linear sliding table 4 for driving the antenna 3 to move back and forth. The slider end of the linear sliding table 4 is fixedly provided with a linear module 5 for driving the antenna 3 to move left and right, a partition wall 6 for separating the turntable 2 from the antenna 3 is arranged in the shielding chamber 1, two test cavities 7 are arranged in a penetrating manner in front of and behind the partition wall 6, the two test cavities 7 are arranged at left and right intervals, and the two test cavities 7 are arranged in a central symmetry manner with respect to the length direction of the partition wall 6. The turntable 2 is provided with two, the shielding chamber 1 is internally provided with a numerical control turntable 10 for driving the two turntable 2 to horizontally rotate, the two turntable 2 are arranged in central symmetry about the rotation center of the numerical control turntable 10, the bottom of the turntable 2 is fixedly provided with a flat plate 9, the end part of the flat plate 9, which is far away from the turntable 2, is fixedly provided with a plugging block 8 which is anastomotic with the testing cavity 7, and the shielding chamber 1 is internally provided with a linear module 11 for driving the turntable 2 and the plugging block 8 to enter the testing cavity 7.
The slider end of the linear module 11 is fixedly connected with the bottom of the casing of the numerical control turntable 10, the rotating end of the numerical control turntable 10 is fixedly connected with two cantilevers 12, and the end of the cantilever 12 away from the numerical control turntable 10 is fixedly connected with the flat plate 9. The test cavity 7 is rectangular frame structure, and the test cavity 7 is formed by the concatenation of polyurethane wave absorbing plate, and the shutoff piece 8 is the wave absorbing silicon rubber material, and when shutoff piece 8 embedding test cavity 7 in, shutoff piece 8 and test cavity 7 are interference fit's mode, and shutoff piece 8 can block off test cavity 7 completely, avoids test signal leakage.
In this embodiment, the linear sliding table 4, the linear module 5 and the linear module 11 are all ball screw type linear modules, the antenna 3 can be controlled to align with the turntable 2 through the linear module 5, the antenna 3 can be controlled to align with the two test cavities 7 through the linear sliding table 4, the numerical control turntable 10 can be moved away from the test cavity 7 through the linear module 11, so that enough space is available for the numerical control turntable 10 to rotate the two turntables 2, and the numerical control turntable 10 can be moved towards the direction close to the test cavity 7, so that the turntables 2 and the plugging blocks 8 enter the test cavity 7.
Because the two turntables 2 are arranged in a central symmetry manner about the rotation center of the numerical control turntable 10 and the positions of the turntables 2 and the plugging blocks 8 are different, only one turntable 2 can completely enter the test cavity 7 under the driving of the numerical control turntable 10 and the linear module 11, and the other turntable 2 is covered by the plugging block 8 nearby the turntable 2, as shown in fig. 1. The wireless products on the two turntables 2 are sequentially and independently measured when electromagnetic compatibility measurement is carried out, so that measurement noise is reduced. Because the environment of the antenna 3 is the same, the wireless products on the two turntables 2 can be ensured to have consistent electromagnetic compatibility measurement environments, and the communication performance comparison is convenient. Electromagnetic compatibility measurement of two wireless products can be carried out in the shielding room 1, so that the change of the testing environment caused by the fact that personnel enter and exit the shielding room 1 is avoided, a purer shielding room 1 is created, and more accurate and stable testing results can be obtained.
Referring to fig. 1, a plurality of shaped sponge cones 13 are fixedly arranged on the inner side wall of the shielding chamber 1 and the side wall of the partition wall, referring to fig. 2 and 3, in the above embodiment, the upper surface of the shaped sponge cone 13 is a conical convex surface 14 arched upwards, the lower surface of the shaped sponge cone 13 is a conical concave surface 15 matched with the conical convex surface 14, and the left side wall and the right side wall of the shaped sponge cone 13 are triangular surfaces 16 inclined towards the ox horn groove 17. The surface of the special-shaped sponge cone 13 far away from the tip end is fixedly provided with a rectangular sponge cushion 21, the rectangular sponge cushion 21 is fixedly connected with the shielding chamber 1 and the partition wall 6 through bolts respectively, the rectangular sponge cushion 21 is fixedly provided with nine special-shaped sponge cones 13, and the nine special-shaped sponge cones 13 are closely distributed in a 3X 3 matrix.
According to the invention, the conical convex surface 14 is beneficial to falling of dust from the special-shaped sponge cone 13, so that dust is prevented from accumulating on the special-shaped sponge cone 13, the thickness of the dust on the special-shaped sponge cone 13 is reduced, thereby improving the electromagnetic wave absorption of the special-shaped sponge cone 13, and the design of the conical concave surface 15 can enable two special-shaped sponge cones 13 arranged up and down to be tightly meshed, prevent gaps from being formed between the upper special-shaped sponge cone 13 and the lower special-shaped sponge cone 13, and improve the electromagnetic wave absorption effect.
The conical convex surface 14 is provided with the ox horn-shaped groove 17 for continuously reflecting signals, and the ox horn-shaped groove 17 reduces the material of the special-shaped sponge cone 13 and reduces the cost of the special-shaped sponge cone 13. The ox horn shaped grooves 17 are provided with a plurality of ox horn shaped grooves 17 which are arranged in parallel left and right. The ox horn shaped groove 17 is formed by encircling a rectangular opening 18 arranged on the conical convex surface 14, a small arc section 19 arranged at the front end of the rectangular opening 18 and recessed away from the conical convex surface 14, and a large arc section 20 arranged at the rear end of the rectangular opening 18 and recessed away from the conical convex surface 14 in sequence, wherein the radius of the small arc section 19 is smaller than that of the large arc section 20. When the direct electromagnetic wave enters the ox horn-shaped groove 17 from the rectangular opening 18, the direct electromagnetic wave firstly contacts the large arc section 20, most of the electromagnetic wave is absorbed and attenuated by the large arc section 20, and a small part of the electromagnetic wave is reflected to the small arc section 19 by the large arc section 20, and due to the arc design of the large arc section 20 and the small arc section 19, the electromagnetic wave reflected from the small arc section 19 continuously reflects to the inside of the ox horn-shaped groove 17, the ox horn-shaped groove 17 can continuously absorb and reflect the electromagnetic wave, and the electromagnetic wave absorbing effect of the special-shaped sponge cone 13 is greatly improved. The ox horn shaped groove 17 can store dust temporarily, external dust can fall into the ox horn shaped groove 17, and because of the semi-closed of the ox horn shaped groove 17, the dust in the ox horn shaped groove 17 is difficult to blow up by air flow, so that the dust is prevented from floating, and the absorption of the special-shaped sponge cone 13 to electromagnetic waves is improved.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Communication contrast test system suitable for wireless product, including shield room (1), the ground and the ceiling of shield room (1) are all fixed and are equipped with wave-absorbing pyramid, be equipped with in shield room (1) and be used for placing carousel (2) of wireless product for receive antenna (3) from wireless product signal, and drive linear sliding table (4) that antenna (3) reciprocated, its characterized in that: the linear module (5) for driving the antenna (3) to move left and right is fixedly arranged at the sliding block end of the linear sliding table (4), a partition wall (6) for separating the turntable (2) from the antenna (3) is arranged in the shielding chamber (1), two test cavities (7) are arranged in a penetrating mode front and back of the partition wall (6), the two test cavities (7) are arranged at left and right intervals, two numerically controlled rotary tables (10) for driving the two turntable (2) to horizontally rotate are arranged in the shielding chamber (1), the two numerically controlled rotary tables (2) are symmetrically arranged in a center mode with respect to the rotation center of the numerically controlled rotary tables (10), a flat plate (9) is fixedly arranged at the bottom of the turntable (2), a plugging block (8) which is matched with the test cavity (7) is fixedly arranged at the end portion of the flat plate (9), and the linear module (11) for driving the turntable (2) and the plugging block (8) to enter the test cavity (7) is arranged in the shielding chamber (1);
the shielding room is characterized in that a plurality of special-shaped sponge cones (13) are fixedly arranged on the inner side wall of the shielding room (1) and the side wall of the partition wall (6), the upper surfaces of the special-shaped sponge cones (13) are conical convex surfaces (14) arched upwards, the lower surfaces of the special-shaped sponge cones (13) are conical concave surfaces (15) matched with the conical convex surfaces (14), and ox horn-shaped grooves (17) for continuously reflecting signals are formed in the conical convex surfaces (14).
2. A communication contrast test system for wireless products according to claim 1, wherein: the sliding block end of the linear module (11) is fixedly connected with the bottom of the casing of the numerical control turntable (10), the rotating end of the numerical control turntable (10) is fixedly connected with two cantilevers (12), and the end part, away from the numerical control turntable (10), of each cantilever (12) is fixedly connected with the flat plate (9).
3. A communication contrast test system for wireless products according to claim 1, wherein: the test cavity (7) is of a rectangular frame structure, the test cavity (7) is formed by splicing polyurethane wave-absorbing plates, and the plugging block (8) is made of wave-absorbing silicon rubber.
4. A communication contrast test system for wireless products according to claim 1, wherein: the surface fixing that its pointed end was kept away from to abnormal shape sponge awl (13) is equipped with rectangle foam-rubber cushion (21), rectangle foam-rubber cushion (21) respectively with shield room (1) with partition wall (6) pass through bolt fixed connection, rectangle foam-rubber cushion (21) is fixed to be equipped with nine abnormal shape sponge awl (13), nine abnormal shape sponge awl (13) are 3 x 3 matrix closely distributed.
5. A communication contrast test system for wireless products according to claim 1, wherein: the left side wall and the right side wall of the special-shaped sponge cone (13) are triangular surfaces (16) inclined towards the direction of the ox horn-shaped groove (17), the ox horn-shaped groove (17) is provided with a plurality of ox horn-shaped grooves (17) which are arranged in parallel left and right.
6. A communication contrast test system for wireless products according to claim 1, wherein: the ox horn-shaped groove (17) is formed by encircling a rectangular opening (18) formed in the conical convex surface (14), a small arc section (19) formed in the front end of the rectangular opening (18) and recessed towards the direction away from the conical convex surface (14), and a large arc section (20) formed in the rear end of the rectangular opening (18) and recessed towards the direction away from the conical convex surface (14) in sequence, wherein the radius of the small arc section (19) is smaller than that of the large arc section (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311109324.4A CN116859135B (en) | 2023-08-31 | 2023-08-31 | Communication contrast test system suitable for wireless product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311109324.4A CN116859135B (en) | 2023-08-31 | 2023-08-31 | Communication contrast test system suitable for wireless product |
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| Publication Number | Publication Date |
|---|---|
| CN116859135A CN116859135A (en) | 2023-10-10 |
| CN116859135B true CN116859135B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311109324.4A Active CN116859135B (en) | 2023-08-31 | 2023-08-31 | Communication contrast test system suitable for wireless product |
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| Country | Link |
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| CN (1) | CN116859135B (en) |
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| GB533412A (en) * | 1939-02-06 | 1941-02-12 | Sponcel Ltd | Apparatus for moulding artificial sponges |
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| CN206411196U (en) * | 2017-01-12 | 2017-08-15 | 深圳市通用测试系统有限公司 | A kind of microwave dark room |
| CN107525973A (en) * | 2017-08-15 | 2017-12-29 | 国网天津市电力公司电力科学研究院 | Conveying type electronic equipment radio frequency electromagnetic field radiation immunity test system |
| CN207181536U (en) * | 2017-09-20 | 2018-04-03 | 青岛中卓海泰微波科技有限公司 | A kind of compatible antenna measurement darkroom |
| CN108084694A (en) * | 2016-11-21 | 2018-05-29 | 洛阳尖端技术研究院 | A kind of taper absorbing material and preparation method thereof |
| CN110542809A (en) * | 2019-08-19 | 2019-12-06 | 深圳立讯检测股份有限公司 | Method for testing radiation immunity of radio frequency electromagnetic field of transmission type electronic equipment |
| CN115014708A (en) * | 2022-08-08 | 2022-09-06 | 交通运输部天津水运工程科学研究所 | High-order curve type wave test tail end wave elimination device and section parameter design method thereof |
-
2023
- 2023-08-31 CN CN202311109324.4A patent/CN116859135B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB533412A (en) * | 1939-02-06 | 1941-02-12 | Sponcel Ltd | Apparatus for moulding artificial sponges |
| CN103364596A (en) * | 2012-03-29 | 2013-10-23 | 鸿富锦精密工业（深圳）有限公司 | Anechoic chamber |
| CN103457035A (en) * | 2013-09-17 | 2013-12-18 | 南京南大波平电子信息有限公司 | Double-arc-curved-surface microwave absorbing material |
| CN204462286U (en) * | 2015-03-18 | 2015-07-08 | 苏州市沃特测试技术服务有限公司 | Between a kind of emc testing |
| CN108084694A (en) * | 2016-11-21 | 2018-05-29 | 洛阳尖端技术研究院 | A kind of taper absorbing material and preparation method thereof |
| CN206411196U (en) * | 2017-01-12 | 2017-08-15 | 深圳市通用测试系统有限公司 | A kind of microwave dark room |
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| Publication number | Publication date |
|---|---|
| CN116859135A (en) | 2023-10-10 |
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