CN204212507U - Micro discharge shielded anechoic chamber - Google Patents
Micro discharge shielded anechoic chamber Download PDFInfo
- Publication number
- CN204212507U CN204212507U CN201420584022.2U CN201420584022U CN204212507U CN 204212507 U CN204212507 U CN 204212507U CN 201420584022 U CN201420584022 U CN 201420584022U CN 204212507 U CN204212507 U CN 204212507U
- Authority
- CN
- China
- Prior art keywords
- galvanized steel
- steel plain
- framework
- screw
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to wireless electron field, particularly relates to micro discharge shielded anechoic chamber.Comprise hexagonal framework of lateral shaft and vertical axis formation, described framework comprises mounting groove, aluminium sheet can be laid in its inside, also comprise the fixed head being positioned at framework side, described fixed head has four angles and screw is laid at each angle, described screw is installed with aluminium sheet and is strained, described aluminium sheet is in connection with screen unit, described screen unit is galvanized steel plain sheet, described galvanized steel plain sheet is coated on framework as crust, described screen unit is galvanized steel plain sheet, and polylith galvanized steel plain sheet each other by joint, and is connected by screw.The closed hexahedron be combined to form can avoid the electromagnetic interference from space outerpace or cable, for experimental system provides metastable electromagnetic environment and test environment.
Description
Technical field
The utility model relates to wireless electron field, particularly relates to micro discharge shielded anechoic chamber.
Background technology
Growing along with high-power effective year what application demand, more and more receives publicity to the phenomenon multipactor discharge problem that microwave device under the high-power condition in space occurs.Make decided progress at the design aspect of communication, remote sensing and satellite high power device between past many decades.
The feature of reference tracking star and target satellite simulation system, for demonstrating in-orbit and verifying catching target, orbital rendezvous, closely independently follow the tracks of, close, the functions such as accompanying flying, and based on the Relative Navigation Experimental Verification System of radar, experiment frequency range is wide, measuring accuracy is high, therefore for avoiding the electromagnetic interference from space outerpace or cable, effective Background suppression noise, strive for experimental system provides metastable electromagnetic environment and test environment, consider from information security angle in addition, in order to effectively improve the anti-electromagnetic information leakage level of the especially tested object of whole experiment, need to build micro discharge shielded anechoic chamber.
utility model content
The object of utility model: in order to provide a kind of shield effectiveness better micro discharge shielded anechoic chamber, specific purposes are shown in concrete implementation section.
In order to reach as above object, the utility model takes following technical scheme:
Micro discharge shielded anechoic chamber, it is characterized in that, comprise hexagonal framework of lateral shaft and vertical axis formation, described framework comprises mounting groove, aluminium sheet can be laid in its inside, also comprise the fixed head being positioned at framework side, described fixed head has four angles and screw is laid at each angle, described screw is installed with aluminium sheet and is strained, described aluminium sheet is in connection with screen unit, described screen unit is galvanized steel plain sheet, described galvanized steel plain sheet is coated on framework as crust, described screen unit is galvanized steel plain sheet, polylith galvanized steel plain sheet is each other by joint, and be connected by screw.
The further technical scheme of the utility model is, described polylith galvanized steel plain sheet is coated with one deck copper mesh 6 each other by the gap engaged.
The further technical scheme of the utility model is, described aluminium sheet is coated with one deck polyurethane foamed material BPUFA700 inwardly.
Adopt the utility model of as above technical scheme, following beneficial effect is had: shield effectiveness is very good relative to prior art, adopt the combination shielding of multilayer many technology kind, the electromagnetic interference from space outerpace or cable can be avoided while good looking appearance, effective Background suppression noise, for experimental system provides metastable electromagnetic environment and test environment.
Accompanying drawing explanation
In order to further illustrate the utility model, be described further below in conjunction with accompanying drawing:
Fig. 1 is frame construction schematic diagram;
Fig. 2 is the structural representation that framework and aluminium sheet combine;
Fig. 3 is the structural representation of outer cells junction;
Fig. 4 is the structural representation of frame strip aluminium sheet mounting groove;
Wherein: 1. framework; 2. fixed head; 3. screw; 4. galvanized steel plain sheet; 5. barricade; 6. copper mesh; 7. mounting groove.
Detailed description of the invention
Be described embodiment of the present utility model below in conjunction with accompanying drawing, embodiment does not form restriction of the present utility model:
Micro discharge shielded anechoic chamber, it is characterized in that, comprise hexagonal framework 1 of lateral shaft and vertical axis formation, described framework 1 comprises mounting groove 7, aluminium sheet 4 can be laid in its inside, also comprise the fixed head 2 being positioned at framework side, described fixed head 2 has four angles and screw 3 is laid at each angle, described screw 3 is installed with aluminium sheet and is strained, described aluminium sheet is in connection with screen unit, described screen unit is galvanized steel plain sheet, described galvanized steel plain sheet is coated on framework as crust, described screen unit is galvanized steel plain sheet, polylith galvanized steel plain sheet is each other by joint, and be connected by screw.
This programme is that satellite antenna test provides clean district environment thus ensures the uniqueness of aerial signal and pure, has following features: 1, darkroom size≤: 10M(is long) × 10M(is wide) × 10M (height) 2, meet shielding properties index lower than equaling:
3, dead zone evenness≤± 0.25, cross polarization≤-35dB
Described polylith galvanized aluminium board is coated with one deck copper mesh 6 each other by the gap engaged.First this programme advantage is to adopt the modularized design of interchangeability, be convenient to follow-up resettlement and dismounting; Secondly 100 object copper mesh are adopted to strengthen electric conductivity and stuffing box between good shielding Index module for obtaining; The existence of aluminium sheet, by the external signal interference for shielding completely, being carried out secondary shield, finally being obtained the index needed.
Described aluminium sheet 4 is coated with one deck polyurethane foamed material BPUFA700 inwardly.
Following as nonessential expansion, further this patent is described:
The structural advantages of framework 1: adopt steel support structure as main support frame to micro discharge darkroom, overall weight is delivered on the concrete of building by steel work.The Braced Frames structure in darkroom is self-supporting, independent of neighboring buildings body of wall and ceiling, has adjusting device during installation, ensures the levelness that shield is installed and verticality, and carries out damp-proof treatment, ground resistance < 4 Ω.Joining Technology: the column of steel work adopts H profile steel, forms lattice structure by column and middle secondary beam, adopts screw connection manner to connect.H profile steel and ground adopt expansion bolt to be connected, chemical medicinal liquid of annotating in hole.Braced Frames structure has used anti-corrosive primer process when dispatching from the factory, can according to the rustproof paint of the requirement brush different colours of client during in-site installation.Enough firm in order to ensure, we calculate the technical data of each structure position, all known existence, or the load change situation that may occur all is taken into account.Zinc-plated module, the zinc-plated module of arbitrary neighborhood two pieces adopts galvanized bolt, nut, pad and copper mesh to assemble, and joint close junction all adopts copper mesh (increase electric conductivity) to carry out pad envelope.Each seam connects with zinc-plated simple eye pad simultaneously, and copper mesh cushion film compresses.Inside, darkroom is attached on galvanized sheet.Adopt the object of aluminium sheet, the electric conductivity utilizing aluminium sheet good forms screen layer again.
About standing-wave ratio
Standing-wave ratio (VSWR) formula of antenna
（1）
ρ is reflectance factor, i.e. the ratio of reflected voltage and incident voltage, and VSWR is voltage standing wave ratio.
In this darkroom system, incident level P0 is provided by vector network analyzer, and reflective level will record with instrument and substitutes into standing-wave ratio formula and calculates the current antenna standing wave ratio recorded.
The electromagnetic wave that the interference level that reception antenna receives enters through the outside transmission of electromagnetic wave and darkroom that metope or other reflects return primarily of transmitting antenna.According to user institute test case, the impact of surperficial darkroom external electromagnetic ripple can be ignored, therefore interference level is primarily of reflecting to form of transmitting.Its signal arrives reception area through path attenuation, antenna gain and absorbing material decay, and level is less than-35dB.Substitute into known conditions, antenna gain is 10dB(hypothesis), material property is better than-25dB, distance decay-34dB, therefore 10dB*2-25dB-34dB=-39dB is less than-35dB, meets the demands.This patent chooses polyurethane foamed material BPUFA700.Preferred BPUFA type pyramid absorbing material is a kind of broadband absorber of making of light polyurethane foamed plastics by leaching carbon black, is widely used in various microwave dark room inwall and mats formation and dark indoor testing equipment is covered.Under vertical incidence and oblique incidence condition, there is fabulous broadband performance, also there is good scattering and isolation fade performance simultaneously, be suitable for each position in darkroom, the various differing heights of this material tool, to meet different technology needs.
This patent frame body avris can open the door, and namely it opens a closed opening, and this opening material is identical with this patent.
It is clear that the technique effect that above structure realizes realizes, if do not consider the technical scheme of adding, this patent title can also be a kind of absorbent structure, the material composition of namely independent hexahedral any one side.
It should be noted that, multiple schemes that this patent provides comprise basic scheme own, separate, mutually do not restrict, but it also can combine when not conflicting mutually, reaching multiple effect and jointly realizing.
more than show and describe general principle of the present utility model, principal character and advantage of the present utility model.Those skilled in the art should understand the utility model and not be restricted to the described embodiments; what describe in above-described embodiment and manual just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope.
Claims (3)
1. micro discharge shielded anechoic chamber, it is characterized in that, comprise hexagonal framework (1) of lateral shaft and vertical axis formation, described framework (1) comprises mounting groove (7), aluminium sheet (4) can be laid in its inside, also comprise the fixed head (2) being positioned at framework side, described fixed head (2) has four angles and screw (3) is laid at each angle, described screw (3) is installed with aluminium sheet and is strained, described aluminium sheet is in connection with screen unit, described screen unit is galvanized steel plain sheet, described galvanized steel plain sheet is coated on framework as crust, described screen unit is galvanized steel plain sheet, polylith galvanized steel plain sheet is each other by joint, and connected by galvanized screw.
2. micro discharge shielded anechoic chamber as claimed in claim 1, is characterized in that, described polylith galvanized steel plain sheet is coated with one deck copper mesh (6), by galvanized screw and zinc-plated compressing tablet compression set each other by the gap engaged.
3. micro discharge shielded anechoic chamber as claimed in claim 1, it is characterized in that, described aluminium sheet (4) is coated with one deck polyurethane foamed material BPUFA700 inwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420584022.2U CN204212507U (en) | 2014-10-10 | 2014-10-10 | Micro discharge shielded anechoic chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420584022.2U CN204212507U (en) | 2014-10-10 | 2014-10-10 | Micro discharge shielded anechoic chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204212507U true CN204212507U (en) | 2015-03-18 |
Family
ID=52981191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420584022.2U Expired - Fee Related CN204212507U (en) | 2014-10-10 | 2014-10-10 | Micro discharge shielded anechoic chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204212507U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105392349A (en) * | 2015-11-05 | 2016-03-09 | 上海电器科学研究所（集团）有限公司 | Anechoic chamber shielding gate capable of improving standing wave characteristic |
| CN105929254A (en) * | 2016-04-28 | 2016-09-07 | 上海华为技术有限公司 | Microwave darkroom |
| CN113543614A (en) * | 2021-06-11 | 2021-10-22 | 西安空间无线电技术研究所 | Large passive intermodulation shielding darkroom |
-
2014
- 2014-10-10 CN CN201420584022.2U patent/CN204212507U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105392349A (en) * | 2015-11-05 | 2016-03-09 | 上海电器科学研究所（集团）有限公司 | Anechoic chamber shielding gate capable of improving standing wave characteristic |
| CN105929254A (en) * | 2016-04-28 | 2016-09-07 | 上海华为技术有限公司 | Microwave darkroom |
| CN105929254B (en) * | 2016-04-28 | 2019-04-19 | 上海华为技术有限公司 | A kind of microwave dark room |
| CN113543614A (en) * | 2021-06-11 | 2021-10-22 | 西安空间无线电技术研究所 | Large passive intermodulation shielding darkroom |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5134405A (en) | Electromagnetically anechoic chamber and shield structures therefor | |
| Lu et al. | Propagation characterization of an office building in the 60 GHz band | |
| Series | Effects of building materials and structures on radiowave propagation above about 100 MHz | |
| CN103866997B (en) | The virtual space opto-electronic ignition system magnetic screen environment composite concealed room of optimization fusion | |
| CN204212507U (en) | Micro discharge shielded anechoic chamber | |
| CN203299295U (en) | Radio frequency radiation immunity test device of electric energy acquisition system | |
| US20210392799A1 (en) | Mission configurable shelter | |
| JPH0732320B2 (en) | Anechoic chamber with reflector | |
| Obeidat et al. | Indoor environment propagation review | |
| Ängskog et al. | Measurement of radio signal propagation through window panes and energy saving windows | |
| CN107271791B (en) | A kind of indoor electromagnetic radiation prediction technique of the wall towards communication base station | |
| Vogel et al. | Propagation measurements for satellite radio reception inside buildings | |
| JP2004270143A (en) | Radio wave absorber, radio wave absorbing panel, radio wave absorbing screen, radio wave absorbing wall, radio wave absorbing ceiling, and radio wave absorbing floor | |
| Mardiguian et al. | The intelligent concrete: A new, economical technique for architectural shielding of buildings | |
| Perez-Fontan et al. | Building entry loss and delay spread measurements on a simulated HAP-to-indoor link at S-band | |
| Wahab | Radar radome and its design considerations | |
| CN203583919U (en) | Ultra-large welding type shielding darkroom of mixed structure | |
| CN108193791B (en) | Indoor electromagnetic protection system and protection method thereof | |
| Limbach et al. | DLR-HR compact test range facility | |
| Conniott et al. | Low Cost Radio Shielding Effectiveness using Carbonised Wood | |
| CN203787554U (en) | Concealed antenna | |
| Huang et al. | Experimental and numerical analyses of electromagnetic attenuation properties of an L-shaped channel constructed by electromagnetic absorbing concrete | |
| Hakgudener | EMW shielding considerations in building design | |
| JP2000286588A (en) | Multiple-type rf anechoic chamber | |
| CN216350957U (en) | Electromagnetic environment noise test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 710000, B, block two, 2508 Fortune Center, hi tech three road, Shaanxi, Xi'an Patentee after: XI'AN JIAYE AVIATION SCIENCE AND TECHNOLOGY CO.,LTD. Address before: 710075, building 4, Daxing County, Tianlong, Lianhu District, Shaanxi, Xi'an, Xi'an Patentee before: XI'AN JIAYE AVIATION SCIENCE AND TECHNOLOGY CO.,LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20211010 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |