CN110797626A - Auxiliary surface-adjustable medium supporting device and preparation method thereof - Google Patents
Auxiliary surface-adjustable medium supporting device and preparation method thereof Download PDFInfo
- Publication number
- CN110797626A CN110797626A CN201911196814.6A CN201911196814A CN110797626A CN 110797626 A CN110797626 A CN 110797626A CN 201911196814 A CN201911196814 A CN 201911196814A CN 110797626 A CN110797626 A CN 110797626A
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- cover
- medium
- auxiliary surface
- secondary surface
- support
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000003365 glass fiber Substances 0.000 claims description 16
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 239000002313 adhesive film Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 3
- 238000007664 blowing Methods 0.000 claims 1
- 239000012779 reinforcing material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 abstract description 9
- 239000011152 fibreglass Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
Landscapes
- Moulding By Coating Moulds (AREA)
Abstract
The invention provides a medium supporting device capable of adjusting a secondary surface and a preparation method thereof. The feed source is assembled at the necking end of the horn mouth, the secondary surface is assembled at the flaring end of the horn shape, the appearance of the secondary surface is consistent with the mouth shape of the flaring end of the horn shape, and the feed source and the secondary surface are concentric. The invention provides a medium support for replacing a traditional antenna secondary surface metal support rod or a glass fiber reinforced plastic support rod, and the medium has the advantages of higher rigidity strength, light weight, good roughness of an outer wall, low dielectric constant in a Ka frequency band, less influence on antenna efficiency and a directional diagram, connection between the medium and the secondary surface through a secondary surface support, simple structure, capability of adjusting the secondary surface up and down, and rapidness, effectiveness and convenience in adjustment.
Description
Technical Field
The invention relates to the technical field of antenna secondary surface supporting, in particular to a secondary surface adjustable medium supporting device and a preparation method thereof. The support form and the secondary surface adjustment form are particularly used for antennas which are miniaturized, lightened and have high requirements on electrical performance, and are particularly suitable for antennas which are carried on an aircraft, a ship, a vehicle and a portable machine.
Background
With the rapid development of modern communication technology, the requirements for the miniaturization and light weight design of satellite communication antennas are more and more strong, and in order to ensure that the antennas have good electrical characteristics, the requirement for the mounting accuracy of the secondary surface is higher, and the requirement for higher frequency is stricter. At present, the self-supporting structure of the secondary surface of the antenna mostly adopts a metal or glass fiber reinforced plastic rod and a high-strength glass fiber reinforced plastic supporting cover, and the adjustment of the secondary surface is adjusted through an upper layer of nut and a lower layer of nut. The structure is complex, the antenna directional diagram is seriously affected, and the antenna directional diagram also has the quality problems of support stability and the like, and can not meet the requirements of the antenna with special use requirements.
Disclosure of Invention
The invention aims to overcome the defects of complex auxiliary surface supporting and adjusting structure, limited electrical performance, poor stability and the like in the prior art, and provides a medium supporting device capable of adjusting an auxiliary surface and a preparation method thereof.
The technical scheme is as follows:
a medium supporting device with an adjustable secondary surface comprises a feed source, a secondary surface and a feed source, wherein the secondary surface is right opposite to the feed source, the medium supporting device further comprises a medium cover, the medium cover is horn-shaped, the feed source is assembled at the reducing end of a horn mouth, the secondary surface is assembled to the expanding end of the horn-shaped, the appearance of the secondary surface is consistent with the mouth shape of the expanding end of the horn-shaped, and the feed source and the secondary surface are concentric.
Further, the auxiliary surface support is further included, a side flange on the side of the auxiliary surface support is arranged at the trumpet-shaped flaring end, the side flange on the side of the auxiliary surface support is connected with the trumpet-shaped flaring end in an adhesive mode, and the auxiliary surface is connected below the auxiliary surface support.
Furthermore, the auxiliary surface bracket is an annular unit with a side flange, the inner side of the side flange is provided with a clamping edge extending into the inner side of the flared end of the trumpet shape, and the auxiliary surface is fixed on the inner side of the clamping edge.
Furthermore, the upper edge of the clamping edge is also provided with an inner ring which extends inwards, and the auxiliary surface 4 is hung below the auxiliary surface support through an auxiliary surface adjusting screw.
A method of making an adjustable secondary media support, comprising the steps of:
comprises the steps of processing, assembling, gluing and curing in sequence,
the processing step of the medium cover in the processing step of S1 is,
step 1: preparing a core film, preparing the core film according to the medium cover, and machining the polymethacrylimide material according to the size of the medium cover; obtaining a frustum-shaped core film which is consistent with the shape of the inner cavity of the medium cover;
step 2: preparing an inner skin of the dielectric cover, coating a release agent on the core film, sequentially paving a glass fiber reinforced epoxy resin prepreg layer and a high-wave-transmission adhesive film layer on the core mold of the dielectric cover to obtain an infiltrated inner skin of the dielectric cover, and taking down the inner skin of the dielectric cover;
and step 3: preparing the outer skin of the medium cover,
coating a release agent on the core film, sequentially paving a glass fiber reinforced epoxy resin prepreg layer and a high-wave-transmission adhesive film layer on the core mold of the dielectric cover, and performing negative pressure curing to obtain an inner skin of the dielectric cover;
and 4, closing the mold, coating the inner skin of the medium cover soaked in the step 2 on a core mold of the medium cover, drying and dehumidifying, sleeving the inner skin of the medium cover obtained in the step 3 on the core mold of the medium cover, gradually paving and adhering an inner skin glue film layer, a glass fiber reinforced epoxy resin prepreg layer, demolding cloth and an air-permeable felt vacuum bag on the outer side from inside to outside, and curing and molding again by adopting vacuum negative pressure to obtain the medium support cover.
Furthermore, glass fiber reinforced materials are coated on the inner wall and the outer wall of the medium support cover.
Compared with the background technology, the invention has the following advantages:
1. the medium cover adopted by the invention is made of polymethacrylimide material, so that the medium cover has the advantages of higher rigidity and strength, light weight, low dielectric constant in a Ka frequency band and less influence on antenna gain and a directional diagram;
2. the medium cover adopted by the invention is formed by machining, so that the machining and mounting precision can be ensured;
3. the medium cover adopted by the invention is of a conical structure, and has a certain protection effect on the feed source and the secondary surface compared with other structural forms;
4. according to the invention, the auxiliary surface and the medium cover are connected through the auxiliary surface bracket, the auxiliary surface can be adjusted up and down directly through the adjusting screw, the adjustment is quick, effective and convenient, and the structure form is simple and compact.
Drawings
FIG. 1: the invention has an integral structure;
FIG. 2: the invention has a cross-sectional structure diagram;
FIG. 3: the invention has a structure splitting schematic diagram;
FIG. 4: the invention is a schematic connection diagram of a secondary surface and a secondary surface bracket;
FIG. 5: a media support assembly view;
FIG. 6: a manufacturing process flow diagram.
Description of reference numerals: the feed source comprises a feed source 1, a medium cover 2, a secondary surface support 3, a secondary surface 4, a feed source baffle 5, a cover plate 6, a secondary surface adjusting screw 7 and a tool 8.
Detailed Description
The present invention is further described with reference to fig. 1 to 6:
as shown in fig. 1 and 2: the utility model provides a medium strutting arrangement of adjustable subplane, includes feed 1, the subplane, the feed is just right with the subplane, still includes the medium cover, the medium cover be loudspeaker form, the feed join in marriage the throat end at the horn mouth, the subplane join in marriage to the flaring end of loudspeaker form, the appearance of subplane is unanimous with the mouth shape at the flaring end of loudspeaker form, feed and subplane are concentric.
Still include vice face support 3, vice face support be the annular unit that has the side flange, the inboard of side flange has the card edge that stretches into to tubaeform flaring end inboard, the vice face fix the card edge inboard, the side flange frame of vice face support side is in tubaeform flaring end department, the side flange of vice face support with tubaeform flaring end cementing, the vice face be located the below of vice face support.
The upper edge of the clamping edge is also provided with an inner ring which extends inwards, and the auxiliary surface 4 is hung below the auxiliary surface bracket through an auxiliary surface adjusting screw.
The medium cover selects polymethacrylimide material, is supported by machining, and is coated with 0.5mm glass fiber reinforced materials on the inner wall and the outer wall in order to ensure the appearance smoothness and the strength of the medium cover.
As shown in figure 1, the feed source and the medium cover, and the medium cover and the secondary surface support are all formed by gluing.
In order to ensure that the medium cover is tightly connected with the feed source and does not fall off, a baffle plate for supporting the medium cover is arranged at the feed source, and the baffle plate is connected with the feed source through a screw.
In order to ensure that the distance between the secondary surface and the secondary surface support is adjustable, the secondary surface and the secondary surface support have four adjustable points, and the distance between the secondary surface and the feed source can be adjusted by rotating an adjusting screw, so that the multi-point adjustment of an antenna directional diagram is realized;
in order to ensure that the device is in a fully closed structure and is repeatedly adjustable, a waterproof cover plate 6 which can be repeatedly disassembled is arranged above the secondary surface bracket.
The specific manufacturing process comprises the following steps:
step 1: preparing a core film, preparing the core film according to the medium cover, and machining the polymethacrylimide material according to the size of the medium cover; obtaining a frustum-shaped core film which is consistent with the shape of the inner cavity of the medium cover;
step 2: preparing an inner skin of the dielectric cover, coating a release agent on the core film, sequentially paving a glass fiber reinforced epoxy resin prepreg layer and a high-wave-transmission adhesive film layer on the core mold of the dielectric cover to obtain an infiltrated inner skin of the dielectric cover, and taking down the inner skin of the dielectric cover;
and step 3: preparing the outer skin of the medium cover,
coating a release agent on the core film, sequentially paving a glass fiber reinforced epoxy resin prepreg layer and a high-wave-transmission adhesive film layer on the core mold of the dielectric cover, and performing negative pressure curing to obtain an inner skin of the dielectric cover;
and 4, step 4: and (3) closing the mold, coating the inner skin of the medium cover soaked in the step (2) on a core mold of the medium cover, drying and dehumidifying, sleeving the inner skin of the medium cover obtained in the step (3) on the core mold of the medium cover, paving an inner skin glue film layer on the outer side of the core mold sequentially from inside to outside, curing and forming the glass fiber reinforced epoxy resin prepreg layer, the demolding cloth and the breathable felt vacuum bag again by adopting vacuum negative pressure to obtain the medium support cover, wherein glass fiber reinforced materials are coated on the inner wall and the outer wall of the medium support cover.
And 5: bonding the feed source and the medium cover by using high-strength structural adhesive, mounting a feed source baffle, and mounting the feed source baffle into a tool magazine 8;
step 6: mounting the screw auxiliary surface and the auxiliary surface bracket to a tool, connecting the screw auxiliary surface and the auxiliary surface bracket to a medium cover by using high-strength structural adhesive, and packaging the theoretical size between the auxiliary surface and the feed source by using the tool;
and 7: and cleaning the residual glue, solidifying the residual glue, and mounting a feed source cover plate after detaching the residual glue from the tool to obtain the medium supporting device.
The mechanism is applied to a 0.9-meter Ka/Ku dual-band portable station antenna. The medium cover of swell structure, it is low to the interception effect of signal, and the actual measurement result shows: in the prior art, the first side lobe of the Ka frequency band is less than-19 dB, the efficiency is more than 35%, the side lobe of the Ku frequency band is less than-21 dB, the efficiency is more than 40%, the first side lobe of the Ka frequency band is less than-15 dB, the efficiency is more than 50%, the side lobe of the Ku frequency band is less than-17 dB, the efficiency is more than 55%, the radiation pattern is rotationally symmetrical, each electrical performance index is good, the device is subjected to high-low temperature, damp-heat, impact, vibration, rain, mould and salt spray tests by a third party, no problem occurs after the tests, and the environmental adaptability meets various use requirements.
Claims (6)
1. The utility model provides a medium strutting arrangement of adjustable counterface, includes the feed, the counterface, the feed, the counterface is just right, its characterized in that: the feed source is assembled at the reducing end of a horn mouth, the secondary surface is assembled at the flaring end of the horn mouth, the appearance of the secondary surface is consistent with the mouth shape of the flaring end of the horn mouth, and the feed source and the secondary surface are concentric.
2. An adjustable secondary media support according to claim 1, wherein: still include vice face support, the side flange frame of vice face support side is in tubaeform flaring end department, the side flange of vice face support side with tubaeform flaring end cementing, vice face connect in the below of vice face support.
3. An adjustable secondary media support according to claim 2, wherein: the auxiliary surface support is an annular unit with a side flange, the inner side of the side flange is provided with a clamping edge extending into the inner side of the flared end of the trumpet shape, and the auxiliary surface is fixed on the inner side of the clamping edge.
4. An adjustable secondary media support according to claim 3, wherein: the upper edge of the clamping edge is also provided with an inner ring which extends inwards, and the auxiliary surface 4 is hung below the auxiliary surface bracket through an auxiliary surface adjusting screw.
5. A method of manufacturing an adjustable secondary media support, comprising an adjustable secondary media support as claimed in any of claims 1 to 4, characterized by the steps of:
comprises the steps of processing, assembling, gluing and curing in sequence,
the processing step of the medium cover in the processing step of S1 is,
step 1: preparing a core film, preparing the core film according to the medium cover, and machining the polymethacrylimide material according to the size of the medium cover; obtaining a frustum-shaped core film which is consistent with the shape of the inner cavity of the medium cover;
step 2: preparing an inner skin of the dielectric cover, coating a release agent on the core film, sequentially paving a glass fiber reinforced epoxy resin prepreg layer and a high-wave-transmission adhesive film layer on the core mold of the dielectric cover to obtain an infiltrated inner skin of the dielectric cover, and taking down the inner skin of the dielectric cover;
and step 3: preparing the outer skin of the medium cover,
coating a release agent on the core film, sequentially paving a glass fiber reinforced epoxy resin prepreg layer and a high-wave-transmission adhesive film layer on the core mold of the dielectric cover, and performing negative pressure curing to obtain an inner skin of the dielectric cover;
and 4, closing the mold, coating the inner skin of the medium cover soaked in the step 2 on a core mold of the medium cover, drying and dehumidifying, sleeving the inner skin of the medium cover obtained in the step 3 on the core mold of the medium cover, gradually paving and adhering an inner skin glue film layer, a glass fiber reinforced epoxy resin prepreg layer, demolding cloth and an air-permeable felt vacuum bag on the outer side from inside to outside, and curing and molding again by adopting vacuum negative pressure to obtain the medium support cover.
6. The method of claim 5, wherein the secondary adjustable media support is formed by: the inner wall and the outer wall of the medium supporting cover are coated with glass fiber reinforced materials.
Step 1: machining and forming a core mold according to the inner cavity and the external dimension of the medium cover;
step 2: machining the polymethacrylimide material according to the size of the medium cover;
and step 3: coating a release agent on a core mould, adopting a high-performance glass fiber reinforced epoxy resin prepreg as a reinforcing material of a medium cover, and paving a glass fiber reinforced epoxy resin prepreg and a high-wave-transmission adhesive film on the core mould;
and 4, step 4: and blowing the processed medium cover blank by high-pressure air, drying and dehumidifying, placing the medium cover blank on a core mould to be attached to an inner skin adhesive film, and paving a high-wave-transmission adhesive film and a glass fiber reinforced epoxy resin prepreg on the outer side. Sequentially paving and pasting auxiliary materials such as demolding cloth, an air felt vacuum bag and the like, and carrying out curing molding according to curing process parameters of the prepreg and the adhesive film by adopting a vacuum negative pressure process to obtain a final medium support cover;
and 5: bonding the feed source and the medium cover by using high-strength structural adhesive, mounting a feed source baffle, and mounting the feed source baffle into a tool;
step 6: mounting the screw auxiliary surface and the auxiliary surface bracket to a tool, connecting the screw auxiliary surface and the auxiliary surface bracket to a medium cover by using high-strength structural adhesive, and packaging the theoretical size between the auxiliary surface and the feed source by using the tool;
and 7: and cleaning the residual glue, solidifying the residual glue, and mounting a feed source cover plate after detaching the residual glue from the tool to obtain the medium supporting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196814.6A CN110797626A (en) | 2019-11-29 | 2019-11-29 | Auxiliary surface-adjustable medium supporting device and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196814.6A CN110797626A (en) | 2019-11-29 | 2019-11-29 | Auxiliary surface-adjustable medium supporting device and preparation method thereof |
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| CN110797626A true CN110797626A (en) | 2020-02-14 |
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| CN201911196814.6A Pending CN110797626A (en) | 2019-11-29 | 2019-11-29 | Auxiliary surface-adjustable medium supporting device and preparation method thereof |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408208A (en) * | 1981-03-23 | 1983-10-04 | Rockwell International Corporation | Dip brazed corrugated feed horn |
| CN1703804A (en) * | 2002-10-07 | 2005-11-30 | 汤姆森许可贸易公司 | Method for making a waveguide microwave antenna |
| CN101841082A (en) * | 2010-05-19 | 2010-09-22 | 广东通宇通讯设备有限公司 | Feed source for microwave antenna and microwave antenna |
| US20110309987A1 (en) * | 2010-06-20 | 2011-12-22 | Siklu Communication ltd. | Reflector antenna including radome |
| CN202275925U (en) * | 2011-10-15 | 2012-06-13 | 江阴市彭利天线有限公司 | Adjusting mechanism for minor face of large-sized antenna |
| CN103474741A (en) * | 2013-09-06 | 2013-12-25 | 中国电子科技集团公司第三十九研究所 | Ring-focus antenna minor face medium supporting cover and manufacturing method thereof |
| CN204441484U (en) * | 2015-04-03 | 2015-07-01 | 上海航天测控通信研究所 | A kind of dual reflector antenna |
| CN105161827A (en) * | 2015-08-20 | 2015-12-16 | 南京中网卫星通信股份有限公司 | Low-profile and high-performance ring-focus satellite communication antenna |
| CN105563964A (en) * | 2015-12-30 | 2016-05-11 | 中国人民解放军国防科学技术大学 | Composite material for airborne radomes, and preparation method thereof |
| CN106207370A (en) * | 2016-08-19 | 2016-12-07 | 西安空间无线电技术研究所 | A kind of reflector antenna adjusts positioner and method |
| CN108346852A (en) * | 2018-01-30 | 2018-07-31 | 东南大学 | A kind of millimeter wave multibeam antenna used for positioning |
| CN211126011U (en) * | 2019-11-29 | 2020-07-28 | 中国电子科技集团公司第五十四研究所 | Medium supporting device with adjustable secondary surface |
-
2019
- 2019-11-29 CN CN201911196814.6A patent/CN110797626A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408208A (en) * | 1981-03-23 | 1983-10-04 | Rockwell International Corporation | Dip brazed corrugated feed horn |
| CN1703804A (en) * | 2002-10-07 | 2005-11-30 | 汤姆森许可贸易公司 | Method for making a waveguide microwave antenna |
| CN101841082A (en) * | 2010-05-19 | 2010-09-22 | 广东通宇通讯设备有限公司 | Feed source for microwave antenna and microwave antenna |
| US20110309987A1 (en) * | 2010-06-20 | 2011-12-22 | Siklu Communication ltd. | Reflector antenna including radome |
| CN202275925U (en) * | 2011-10-15 | 2012-06-13 | 江阴市彭利天线有限公司 | Adjusting mechanism for minor face of large-sized antenna |
| CN103474741A (en) * | 2013-09-06 | 2013-12-25 | 中国电子科技集团公司第三十九研究所 | Ring-focus antenna minor face medium supporting cover and manufacturing method thereof |
| CN204441484U (en) * | 2015-04-03 | 2015-07-01 | 上海航天测控通信研究所 | A kind of dual reflector antenna |
| CN105161827A (en) * | 2015-08-20 | 2015-12-16 | 南京中网卫星通信股份有限公司 | Low-profile and high-performance ring-focus satellite communication antenna |
| CN105563964A (en) * | 2015-12-30 | 2016-05-11 | 中国人民解放军国防科学技术大学 | Composite material for airborne radomes, and preparation method thereof |
| CN106207370A (en) * | 2016-08-19 | 2016-12-07 | 西安空间无线电技术研究所 | A kind of reflector antenna adjusts positioner and method |
| CN108346852A (en) * | 2018-01-30 | 2018-07-31 | 东南大学 | A kind of millimeter wave multibeam antenna used for positioning |
| CN211126011U (en) * | 2019-11-29 | 2020-07-28 | 中国电子科技集团公司第五十四研究所 | Medium supporting device with adjustable secondary surface |
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Application publication date: 20200214 |