CN201146663Y - Shielded cap - Google Patents
Shielded cap Download PDFInfo
- Publication number
- CN201146663Y CN201146663Y CNU2007201208958U CN200720120895U CN201146663Y CN 201146663 Y CN201146663 Y CN 201146663Y CN U2007201208958 U CNU2007201208958 U CN U2007201208958U CN 200720120895 U CN200720120895 U CN 200720120895U CN 201146663 Y CN201146663 Y CN 201146663Y
- Authority
- CN
- China
- Prior art keywords
- parting bead
- shielding case
- plastic
- plastics
- metal plate
- 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 - Lifetime
Links
- 239000004033 plastic Substances 0.000 claims abstract description 69
- 229920003023 plastic Polymers 0.000 claims abstract description 69
- 239000002184 metal Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000011324 bead Substances 0.000 claims description 50
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010295 mobile communication Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000004381 surface treatment Methods 0.000 description 6
- 238000004512 die casting Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000002955 isolation Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
Images
Landscapes
- Details Of Aerials (AREA)
Abstract
The utility model discloses a shielding case which relates to the mechanical shielding of mobile communication, in particular to a low-cost shielding case. The shielding case comprises a flat plate and a parting strip; the flat plate is a metal plate and the parting strip is a plastic parting strip; the plastic parting strip is fixed on the metal plate. The shielding case is divided into two parts, that is, a cavity strip part made from conductive plastic and a metal plate part, thus forming a combined plastic shielding case. Compared with the existing plastic shielding case, the usage of the conductive plastic can be reduced more than 60 percent, thus reducing the cost of the combined shielding case by half compared with the whole plastic shielding case. Compared with the existing metal shielding case, the shielding case obviously overcomes the defect of the existing technology that the metal shielding case is complicated in production as the technical proposal of the utility model is adopted, the plastic strip is one-time molded with no mechanical processing, good molding uniformity and high production efficiency are achieved.
Description
Technical field
The utility model relates to the structual shield of field of mobile communication, relates in particular to a kind of radome cheaply.
Background technology
The radio frequency of communications electronics product (rf board, power amplifier), difference frequency, amplifying circuit need shield isolation to circuit module with the radome of multi-cavity body, and traditional solution is to adopt metallic shield.The power amplifier that is to use metallic shield that shows among Fig. 1; What Fig. 2 showed is the bottom isometric view of metallic shield on the rf board; Fig. 3 is the end face stereogram of metallic shield on the rf board.This metallic shield comprises two parts, flat board and parting bead two parts, this radome 2 generally be by die casting process shown in Fig. 2,3, because the hair of depanning badly has certain distortion, when fitting with PCB, because PCB is fixed on the radiation tooth base, such two rigid bodies compress, can't guarantee parting bead plane and parallel applying completely completely simultaneously, thereby can occur that local cavity screening effectiveness is not high to cause isolation not enough.In order to address this problem, it is flat usually to take the secondary machine mode that the surface is milled, can't guarantee like this to realize that with base face is fitted completely, thereby will be at the parting bead bottom surface of radome 2 filled conductive rubber 10 (or some glue FIP), shown in Fig. 4 A, 4B toward contact.
After described metallic shield die casting processes, also need parting bead, flat board to the metallic shield secondary machine of process such as hole, carry out surface treatments such as parting bead surface sand-blasting, electric conductive oxidations again.
There is following deficiency in this method: 1) compression mod cost height, and the mould that the product development initial stage just needs to drop into a costliness takes; 2) blank that comes out of die casting also needs through a large amount of machine work and surface treatment, needs to fill expensive conductive rubber in addition; 3) processing needs to have enough to meet the need between several factories respectively, and the process-cycle is longer.
In order to address the above problem, conductive plastics has appearred in recent years, and for example, at the fine conductive plastics of commercial in batches carbon, frequency electromagnetic waves is had high screening effectiveness, and have certain microwave absorption capacity at present.Similar substantially with the radome project organization that the conductive plastics alternative metals is made with metallic shield.Because the injection mold price is extremely low, one-shot forming, and plastics do not resemble that rigidity itself has certain elasticity greatly the metal cap, do not need filled conductive rubber, do not need surface treatment yet, thereby the application of on rf board, power amplifier, succeeing.But because the fine conductive plastics price of carbon is more expensive, when base areas is big, need design thicker base plate and reinforcement ability high temperature deformation resistance, in some cases, not have tangible cost advantage with respect to metallic shield.
The utility model content
Problem to be solved in the utility model is to overcome metallic shield of the prior art to make complicated shortcoming, overcomes plastic shielding cover cost problem of higher simultaneously, and a kind of metal, the combined radome of plastics are provided.
Radome described in the utility model comprises flat board, parting bead two parts, it is characterized in that: described flat board is a metal plate, and described parting bead is the plastics parting bead, and described plastics parting bead is fixed on the metal plate.
Described plastics parting bead is fastened on the metal plate.This is a kind of mode of fixing.
Described plastics parting bead is by being bolted on the metal plate.Bolt fixed mode can make assembling simple.
The degree of roughness on the spacing of the screw of described bolt and plastics parting bead surface is inverse ratio.Plastics parting bead surface coarse more, the spacing of screw is more little, can guarantee to satisfy the requirement that electromagnetic shielding is isolated so better.
The hardness of the spacing of the screw of described bolt and plastics parting bead is inverse ratio.The plastics parting bead is hard more, and the spacing of screw is more little, can guarantee to satisfy the requirement that electromagnetic shielding is isolated so better.
Described plastics parting bead has breach.The notion of similar Faraday cage under the situation that satisfies the shielding insulation request, can further reduce the consumption of conductive plastics.
The size and the wave frequency of the breach on the described plastics parting bead are inversely proportional to.Wave frequency is high more, and breach is more little, can guarantee to satisfy the requirement that electromagnetic shielding is isolated so better.
The width of the breach on the described plastics parting bead is not more than 1/20 of electromagnetic wavelength.Like this can be better to satisfy the requirement of shielding.
The utility model is owing to be divided into two radome, and promptly cavity parting bead part and the metal plate part made of conductive plastics forms and make up the shielding plastic cover.With respect to existing plastic shielding cover, because the cost of shielding plastic cover depends primarily on the consumption of conductive plastics, and the main materials of bulk shielding plastic jacket are on flat board, parting bead part consumption is less, and the cost of metal plate is extremely low, so after the employing the technical solution of the utility model, the conductive plastics consumption can reduce more than 60%, make the cost of combination radome reduce by more than 50 like this with respect to the bulk shielding plastic jacket.With respect to existing metallic shield, because metallic shield complex process, mainly be to be its dividing plate processed complex, as die casting, secondary machine, surface treatment, after the employing the technical solution of the utility model, the one-shot forming of plastics parting bead, need not machining, the moulding high conformity, the production efficiency height is made complicated shortcoming so overcome metallic shield of the prior art significantly.
Description of drawings
Fig. 1 is the overall structure schematic diagram of mobile communication product power amplifier or rf board, and the radio frequency pcb board is installed on the metab, and the local circuit of radio frequency PCB or monoblock PCB go up radome is installed;
Fig. 2 is the end face stereogram of metallic shield on the rf board;
Fig. 3 A is the local diagrammatic sketch that conductive rubber has been filled in the metallic shield bottom surface;
Fig. 3 B is the partial cutaway diagrammatic sketch that conductive rubber has been filled in the metallic shield bottom surface;
Fig. 4 is the utility model combination shielding plastic cover stereogram (shielding plastic parting bead+metal plate);
Fig. 5 is that the utility model is at the local diagrammatic sketch of the breach processing mode of plastics parting bead.
Among the figure: 1, cover plate, 2, radome, 3, circuit module, 4, circuit module, 5, circuit module, 6, circuit module, 7, rf board, 8, radiation tooth, 9, the thermal source of rf board, 10, base, 11, conductive rubber, 12, metal plate, 13, parting bead.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
The power amplifier that is to use radome that shows among Fig. 1; This is the purposes that illustrates radome with a kind of circuit that uses radome.Power amplifier module comprises base 9 and cover plate 1, and rf board 7 is fixed on the metab 10 that has radiation tooth 8, and the thermal source of rf board 9 dispels the heat by base.Circuit module 3,4,5,6 usefulness radomes 2 on the rf board shield isolation.The structure that the power amplifier of use metallic shield, plastic shielding cover, combination radome shows in Fig. 1 is all the same.
Shown in Fig. 2,3A, 3B, traditional radome 2 usefulness die cast metals form, and carry out machine work and surface treatment then, want filled conductive rubber 11 in the parting bead bottom toward contact at last.
As shown in Figure 4, take shielding plastic parting bead 13 to add the compound mode of metal plate 12 in the present embodiment, be formed into combination shielding plastic cover 2.Plastics parting bead 13 is by being bolted on the metal plate 12.The degree of roughness on the spacing of described screw and plastics parting bead 13 surfaces is inverse ratio.The hardness of the spacing of the screw of described bolt and plastics parting bead 13 is inverse ratio.As shown in Figure 5, plastics parting bead 13 has breach, and parting bead originally is smooth, and the parting bead that present embodiment has a breach looks and resembles zigzag or city wall line.The breach size of the breach on the plastics parting bead 13 is inversely proportional to wave frequency.The width of the breach on the plastics parting bead is not more than 1/20 of electromagnetic wavelength.
Because radome is divided into two, promptly cavity parting bead part and the metal plate part made of conductive plastics forms and makes up the shielding plastic cover.With respect to existing plastic shielding cover, because the cost of shielding plastic cover depends primarily on the consumption of conductive plastics, and the main materials of bulk shielding plastic jacket are on flat board, parting bead part consumption is less, and the cost of metal plate is extremely low, so after the employing the technical solution of the utility model, the conductive plastics consumption can reduce more than 60%, make the cost of combination radome reduce by more than 50 like this with respect to the bulk shielding plastic jacket.Gap on the plastics parting bead can further reduce the consumption of conductive plastics.
With respect to existing metallic shield, because metallic shield complex process, mainly be to be its dividing plate processed complex, as die casting, secondary machine, surface treatment, after the employing the technical solution of the utility model, the one-shot forming of plastics parting bead, need not machining, the moulding high conformity, the production efficiency height is made complicated shortcoming so overcome metallic shield of the prior art significantly.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (9)
1, a kind of radome comprises flat board, parting bead two parts, it is characterized in that: described flat board is a metal plate, and described parting bead is the plastics parting bead, and described plastics parting bead is fixed on the metal plate.
2, a kind of radome according to claim 1 is characterized in that: described plastics parting bead is fastened on the metal plate.
3, a kind of radome according to claim 2 is characterized in that: described plastics parting bead is by being bolted on the metal plate.
4, a kind of radome according to claim 3 is characterized in that: the degree of roughness on the spacing of the screw of described bolt and plastics parting bead surface is inverse ratio.
5, a kind of radome according to claim 3 is characterized in that: the hardness of the spacing of the screw of described bolt and plastics parting bead is inverse ratio.
6, according to claim 1 or 2 or 3 or 4 or 5 described a kind of radomes, it is characterized in that: described plastics parting bead has breach.
7, a kind of radome according to claim 6 is characterized in that: the size and the wave frequency of the breach on the described plastics parting bead are inversely proportional to.
8, a kind of radome according to claim 6 is characterized in that: the degree of depth of the breach on the described plastics parting bead is not more than 1/20 of electromagnetic wavelength.
9, a kind of radome according to claim 7 is characterized in that: the degree of depth of the breach on the described plastics parting bead is not more than 1/20 of electromagnetic wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201208958U CN201146663Y (en) | 2007-06-15 | 2007-06-15 | Shielded cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201208958U CN201146663Y (en) | 2007-06-15 | 2007-06-15 | Shielded cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201146663Y true CN201146663Y (en) | 2008-11-05 |
Family
ID=40083547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201208958U Expired - Lifetime CN201146663Y (en) | 2007-06-15 | 2007-06-15 | Shielded cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201146663Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102378549A (en) * | 2010-08-19 | 2012-03-14 | 中兴通讯股份有限公司 | Radiating device of outdoor radio frequency unit |
| CN111587057A (en) * | 2020-05-15 | 2020-08-25 | 深圳市飞荣达科技股份有限公司 | Shielding box |
-
2007
- 2007-06-15 CN CNU2007201208958U patent/CN201146663Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102378549A (en) * | 2010-08-19 | 2012-03-14 | 中兴通讯股份有限公司 | Radiating device of outdoor radio frequency unit |
| CN102378549B (en) * | 2010-08-19 | 2016-03-16 | 中兴通讯股份有限公司 | A kind of radiating device of outdoor radio frequency unit |
| CN111587057A (en) * | 2020-05-15 | 2020-08-25 | 深圳市飞荣达科技股份有限公司 | Shielding box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101820094B (en) | Antenna embedded mobile communication terminal case and method of manufacturing same, mobile communication terminal | |
| CN101728630B (en) | Electronic communication equipment and manufacturing process thereof | |
| CN102377009A (en) | Electrical apparatus shell and manufacture method thereof | |
| CN203721860U (en) | Dielectric filter | |
| CN106304713A (en) | Housing, use the electronic installation of this housing and the manufacture method of this housing | |
| CN201146663Y (en) | Shielded cap | |
| CN104902356A (en) | Speaker module | |
| CN110311222A (en) | Active antenna unit and antenna unit for base station | |
| CN109228066A (en) | Multidirectional laying carbon fiber enhancement resin base composite material microwave solidification method | |
| CN101150948A (en) | Plastic shielding cover | |
| CN101593620A (en) | A kind of method for packing of electronic transformer cores and encapsulation metal molding die | |
| CN201781520U (en) | Shell with built-in antenna | |
| CN204014411U (en) | A kind of radiofrequency signal packaging body | |
| CN110323534A (en) | A kind of active antenna element and antenna element for base station | |
| CN204666807U (en) | Integrative Radar frequency microwave assembly | |
| CN211860857U (en) | Radiator of power supply | |
| CN207117714U (en) | A kind of new radiating cell phone rear cover with antenna | |
| CN218548104U (en) | High-frequency stainless steel insulator sintering mould | |
| CN203481390U (en) | Ferrite module used for electronic equipment | |
| CN201541399U (en) | Wireless communication equipment casing | |
| CN207150685U (en) | A kind of new radiating cell phone rear cover with antenna | |
| CN211826466U (en) | Millimeter wave radar shell with arch structure | |
| CN102544648B (en) | Dielectric filter and multiplexer | |
| CN202285267U (en) | Medium filter, medium resonator, cover plate unit and communication equipment | |
| CN104777458A (en) | Integrated radar radio-frequency microwave module and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081105 |