CN102839844B - Microwave anechoic chamber for intermodulation test - Google Patents
Microwave anechoic chamber for intermodulation test Download PDFInfo
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- CN102839844B CN102839844B CN201210323894.9A CN201210323894A CN102839844B CN 102839844 B CN102839844 B CN 102839844B CN 201210323894 A CN201210323894 A CN 201210323894A CN 102839844 B CN102839844 B CN 102839844B
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Abstract
The invention discloses a microwave anechoic chamber for intermodulation test, which is composed of a chamber main body and a wave absorbing material arranged in the chamber main body. The chamber main body is a closed space composed of a keel frame and blocky wall faces fixed on the keel frame and capable of accommodating workers to walk inside. The chamber is characterized in that a shield layer is arranged on the surface of the side of the blocky wall faces facing the closed space, the wave absorbing material is fixed on the shield layer, and an operation platform for workers to walk on is arranged inside the chamber main body. The inventive chamber adopts an aluminum alloy plate adhered to a fireproof flame-retardant plate, and uses an insulating shielding aluminum foil to cover a joint to effectively avoid formation of large-area strong intermodulation source in the chamber and ensure that the interference source prone to excitation and intermodulation in the shield body structure is weakened, to the maximum extent.
Description
Technical field
The present invention relates to the test laboratory applied in a kind of communications industry, specifically a kind of microwave dark room for intermodulation testing.
Background technology
Along with communication band is more and more crowded, communication signal quality requires more and more higher, the inter-modulated signal that communication antenna produces at work has a negative impact more and more serious to communication system, its performance indications become and become more and more important, and must measure antenna intermodulation characteristic.
Antenna is the microwave equipment to free space radiated electromagnetic wave, the test of antenna performance must be tested in free space environment, and due to place and condition of work restriction, people wish to carry out antenna equipment test in indoor, so must microwave dark room be used, to simulate free space environment, realize domestic aerial test condition.
Existing microwave dark room can be tested antenna transmission and radiance, but when test antenna intermodulation index, because the characteristic of anechoic chamber configuration and parts introduces Intermodulation Interference source, causes test error.The main cause affecting intermodulation index test have following some: the shielding ferrimagnets such as iron and steel that use in darkroom make more; The securing member that darkroom mask splice or technique produce, gap or burr; Absorber does not have close installation, causes partly shielding effect body exposed; The device layouts such as dark indoor illumination light fitting are undesirable; In darkroom, foreign material cleaning not in time etc.
Summary of the invention
According to the technical problem of above-mentioned proposition, must redesign on basis, original darkroom, get rid of the intermodulation factor that darkroom causes, also should possess general darkroom other power of tests except intermodulation testing with stylish intermodulation darkroom, thus a kind of microwave dark room for intermodulation testing is provided.The technological means that the present invention adopts is as follows:
A kind of microwave dark room for intermodulation testing, be made up of darkroom main body and the absorbing material be arranged in the main body of darkroom, described darkroom main body is by keel frame and be fixed on the enclosure space that held staff that the block wall on described keel frame forms walks therein, it is characterized in that: described block wall is provided with screen layer on the surface in the face of the side of described enclosure space, and described screen layer is fixed with described absorbing material; Being provided with in the inside of described darkroom main body can for the operating platform of staff's walking.
As preferably, described block wall adopts the wood materials of fire protection flame retarding, and the material of described screen layer is aluminium alloy plate.
As preferably, the fixed form of described screen layer and described block wall is gluing.
As preferably, the seam crossing of described screen layer is provided with shielding adhesive tape.
As preferably, the width of described shielding adhesive tape is that b, b meet: b > 1/10 λ, wherein λ is the minimum operation wavelength of microwave dark room.
As preferably, the material of described shielding adhesive tape is the aluminum foil material with insulating coating.
As preferably, described absorbing material is pyramid absorbent material.
As preferably, the most advanced and sophisticated projection bottom described absorbing material of cone angle that the described absorbing material being fixed on the seam crossing of described screen layer should meet described absorbing material drops on the straight line of described seam crossing place.
As preferably, described operating platform is wooden platform.
As preferably, be provided with lighting and vent window in the bottom surrounding of described darkroom main body.
The main innovation part of the present invention is:
1, darkroom shielding adopts aluminum alloy plate materials, comprises keel and screen-wall aspect;
2, abandon traditional assembling mode of splicing or welding, and use adhesive means directly to paste on wooden structures by aluminium sheet; The gap produced when avoiding splicing and exposed securing member, the burr of appearance when simultaneously also avoiding welding and welding hole situation;
3, use the positive and negative of one fixed width all to cover the seam crossing of the shielding adhesive tape aluminium coating profile material of dielectric film, shielding adhesive tape adopts aluminium foil material;
4, optimal design absorber layout, ensures that the interference source of easily excitation intermodulation in shield structure obtains weak to greatest extent;
5, rearrange the position of the equipment such as lighting, ventilation, reduce its interference effect;
6, wood floors are laid on ground, darkroom, reduce the possibility losing foreign material.
The present invention extensively can promote in fields such as electronic communication, microwave technology thermometricallies for the foregoing reasons.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Detailed description of the invention
As shown in Figure 1, a kind of microwave dark room for intermodulation testing, be made up of darkroom main body and the absorbing material 4 be arranged in the main body of darkroom, described darkroom main body is by keel frame 1 and be fixed on the enclosure space that held staff that the block wall 2 on described keel frame 1 forms walks therein, the material of keel frame 1 is aluminum alloy plate materials, adopt the aluminum alloy plate materials of nonferromugnetic material to build darkroom screening can, avoid the formation in the strong intermodulation source of darkroom large area.Described block wall 2 adopts the wood materials of fire protection flame retarding, stick with glue the screen layer 3 of aluminum alloy material on the surface in the face of the side of described enclosure space at described block wall 2, adopting gluing is produce burr and bubble because of welding for avoiding, and causes the appearance of the uneven conductiving point such as shorted contacts, burr.Shielding adhesive tape is provided with at the seam crossing of every two pieces of described screen layers 3, the width of described shielding adhesive tape is b, b meets: b > 1/10 λ, wherein λ is the minimum operation wavelength of microwave dark room, the material of described shielding adhesive tape is the aluminum foil material with insulating coating, and shielding adhesive tape ensures that aluminium sheet seam does not directly expose, and insulating coating will have enough thickness and intensity, to ensure that sharp aluminium sheet edge or burr do not scratch overlay film and the short circuit of aluminum foil screen shield tape when pasting; Although the shielding adhesive tape of insulation can cause the state being in open circuit between each aluminum alloy plate materials, structure can sacrifice the shield effectiveness of part high frequency (more than 100GHz) thus, but the communications industry cover working frequency range (300MHz ~ 3GHz) its on test impact very little.Described screen layer 3 is fixed with described absorbing material 4, described absorbing material 4 is pyramid absorbent material, and the most advanced and sophisticated projection bottom described absorbing material 4 of cone angle that the described absorbing material 4 being fixed on the seam crossing of described screen layer 3 should meet described absorbing material 4 drops on the straight line of described seam crossing place (as shown in Figure 2), even if pyramid type absorbent material thickness (cone angle tip place) is covered in aluminium sheet seam crossing, the intermodulation effects of further absorption discontinuous conductors medium, absorber is laid closely knit compact, arrange absorbing material 4 with not exposed aluminium sheet shield for standard, when absorbing material 4 is installed at main body arch top, darkroom, can cut bottom material, to guarantee to install firmly and installation site accurate.Being provided with in the inside of described darkroom main body can for the operating platform 5 of staff's walking, described operating platform 5 is wooden platform, operating platform 5 is while facilitating staff's movement, the cleaning being also convenient to inside, darkroom arranges, avoid foreign material something lost drop into into absorber gap and not easily find, cause darkroom performance to decline suddenly and the generation of agnogenic situation.Be provided with lighting and vent window in the bottom surrounding of described darkroom main body, illuminating lamp is placed in four, darkroom leftover bits and pieces, upwards irradiates; At main body arch top, darkroom lifting white foam benzene plate, illuminating ray reflection is put on antenna measurement table top; The equipment such as lighting and vent window is placed in ground, darkroom or corner, side place, avoids it to enter the main radiation area of antenna like this, reduce intermodulation effects as far as possible.Use the illuminating ray that the reflection of white foam benzene plate is got a foothold from darkroom, ventilation waveguide uses aluminium net to make, and does not affect illuminating effect and ventilation effect.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (3)
1. the microwave dark room for intermodulation testing, be made up of darkroom main body and the absorbing material (4) be arranged in the main body of darkroom, described darkroom main body is by keel frame (1) and be fixed on the enclosure space that held staff that the block wall (2) on described keel frame (1) forms walks therein, it is characterized in that:
Described block wall (2) is provided with screen layer (3) on the surface in the face of the side of described enclosure space, described block wall (2) adopts the wood materials of fire protection flame retarding, and the material of described screen layer (3) is aluminium alloy plate; Described screen layer (3) is gluing with the fixed form of described block wall (2); The seam crossing of described screen layer (3) is provided with shielding adhesive tape, and the material of described shielding adhesive tape is the aluminum foil material with insulating coating; The width of described shielding adhesive tape is that b, b meet: b > 1/10 λ, and wherein λ is the minimum operation wavelength of microwave dark room;
Described screen layer (3) is fixed with described absorbing material (4), described absorbing material (4) is pyramid absorbent material; The most advanced and sophisticated projection in described absorbing material (4) bottom of cone angle that the described absorbing material (4) being fixed on the seam crossing of described screen layer (3) should meet described absorbing material (4) drops on the straight line of described seam crossing place;
Being provided with in the inside of described darkroom main body can for the operating platform (5) of staff's walking.
2. a kind of microwave dark room for intermodulation testing according to claim 1, is characterized in that: described operating platform (5) is wooden platform.
3. a kind of microwave dark room for intermodulation testing according to claim 1, is characterized in that: be provided with lighting and vent window in the bottom surrounding of described darkroom main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210323894.9A CN102839844B (en) | 2012-09-04 | 2012-09-04 | Microwave anechoic chamber for intermodulation test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210323894.9A CN102839844B (en) | 2012-09-04 | 2012-09-04 | Microwave anechoic chamber for intermodulation test |
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| Publication Number | Publication Date |
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| CN102839844A CN102839844A (en) | 2012-12-26 |
| CN102839844B true CN102839844B (en) | 2015-01-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106088377A (en) * | 2016-07-29 | 2016-11-09 | 江西洪都航空工业集团有限责任公司 | Pyramid absorbing material is at the installation method of metope inner corner trim and mounting structure |
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| CN103866997B (en) * | 2014-03-27 | 2015-12-30 | 上海一航凯迈光机电设备有限公司 | The virtual space opto-electronic ignition system magnetic screen environment composite concealed room of optimization fusion |
| CN105822124A (en) * | 2016-05-06 | 2016-08-03 | 张宇桥 | Microwave dark chamber used for third-order cross modulation and standing wave testing of antenna |
| CN109208772A (en) * | 2017-06-30 | 2019-01-15 | 北新集团建材股份有限公司 | A kind of preparation method of radiation protection sound absorbing plate |
| CN107491611B (en) * | 2017-08-22 | 2021-02-26 | 湖南卫导信息科技有限公司 | Anti-interference test scene design method based on microwave darkroom antenna layout |
| CN111707875A (en) * | 2020-05-08 | 2020-09-25 | 中石化石油工程技术服务有限公司 | Electric control pry shielding effectiveness testing device and method for gas gathering station field |
| CN112549687B (en) * | 2020-11-19 | 2021-07-23 | 贵州航天建设工程有限公司 | Modified polyimide-based wave-absorbing material for microwave anechoic chamber, wave-absorbing structure and preparation method of wave-absorbing structure |
| CN113917386A (en) * | 2021-09-18 | 2022-01-11 | 浙江瑞银电子有限公司 | A half anechoic chamber for ammeter immunity is experimental |
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| CN202755711U (en) * | 2012-09-04 | 2013-02-27 | 大连东信微波吸收材料有限公司 | Microwave anechoic chamber for intermodulation test |
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| CN1085286C (en) * | 1995-06-29 | 2002-05-22 | 清水建设株式会社 | Electromagnetic shielded building |
| CN1928278A (en) * | 2006-09-26 | 2007-03-14 | Zhang Rongchu | Transparent soundproof room |
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| CN106088377A (en) * | 2016-07-29 | 2016-11-09 | 江西洪都航空工业集团有限责任公司 | Pyramid absorbing material is at the installation method of metope inner corner trim and mounting structure |
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| CN102839844A (en) | 2012-12-26 |
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Owner name: DALIAN DONGSHIN MICROWAVE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: DONGXIN MICRO-WAVE ABSORBING MATERIAL CO., LTD., DALIAN Effective date: 20150827 |
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Effective date of registration: 20150827 Address after: Lazishan village xinzhaizi street in Ganjingzi District of Dalian City, Liaoning province 116000 Patentee after: DALIAN DONGSHIN MICROWAVE TECHNOLOGY CO., LTD. Address before: Xinzhaizi rainbow Development Zone of Ganjingzi District of Dalian City, Liaoning province 116000 Patentee before: Dalian Dongshin Microwave Absorber Material Co., Ltd. |