CN2755913Y - Electromagnetic shielding device - Google Patents
Electromagnetic shielding device Download PDFInfo
- Publication number
- CN2755913Y CN2755913Y CN 200420114043 CN200420114043U CN2755913Y CN 2755913 Y CN2755913 Y CN 2755913Y CN 200420114043 CN200420114043 CN 200420114043 CN 200420114043 U CN200420114043 U CN 200420114043U CN 2755913 Y CN2755913 Y CN 2755913Y
- Authority
- CN
- China
- Prior art keywords
- metallic conductor
- radome
- substrate
- shielded enclosure
- ground connection
- 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
Images
Abstract
The utility model discloses an electromagnetic shielding device which comprises a shielding cover, wherein the shielding cover is provided with at least one shielding chamber and is applied to a basal plate comprising a plurality of electronic components. When the side wall of the shielding cover is fastened or fixedly welded with the grounding of the basal plate, the electronic components are put in the shielding chamber. The utility model is characterized in that the shielding device also comprises a plurality of electrically connecting devices, wherein one end of each electrically connecting device is connected with the top of the shielding chamber and the other end of each electrically connecting device is connected with the grounding arranged on the basal plate; in this way, the top of the shielding chamber is electrically connected with the grounding of the basal plate, so the utility model can effectively reduce the electric impedance of the shielding cover and enhance the grounding effect of the shielding cover to further improve the shielding effect of the electromagnetic shielding device.
Description
[technical field]
The utility model relates to a kind of electromagnetic screen that can prevent the Electromagnetic Interference between electronic equipment part and the circuit and external electromagnetic waves to radiation of equipment.
[background technology]
Electromagnetic screen is very common in electronic equipment, particularly almost is indispensable parts in wireless communication field.Electromagnetic screen is mainly used in and prevents the interference of external electromagnetic signal to circuit, prevents also that simultaneously electromagenetic wave radiation that internal circuit produces from going out the electronic equipment that disturbs other.For highly sensitive wireless receiver, the quality of the quality of its shield effectiveness even the whole electric equipment that directly influences.As Fig. 1, Fig. 2 and shown in Figure 3, traditional electromagnetic screen comprises a radome 10, a substrate 11, electronic component 12 is arranged on the substrate 11, radome 10 has the case shape shielded enclosure that at least one end opens wide, when the open end of described radome 10 and described substrate 11 fastened, described electronic component 12 was housed in the shielded enclosure.
Though said method can play certain shielding action, if when the shielded enclosure area is big, the radome center is to the also increase thereupon of distance at edge, thereby causes the resistance resistance of radome center big, can have influence on the bulk shielding effect.
[utility model content]
The purpose of this utility model is to provide a kind of electromagnetic screen with better shield effectiveness.
The purpose of this utility model is achieved through the following technical solutions: a kind of electromagnetic screen, comprise a radome, and described radome has at least one shielded enclosure; Be applied on the substrate that contains several electronic components, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, described electronic component is contained in the described shielded enclosure, it is characterized in that: described screening arrangement also comprises several arrangements of electric connections, described arrangements of electric connection one end links to each other with described shielded enclosure top, the ground connection that is provided with on the other end and the described substrate links to each other, and makes the ground connection of described shielded enclosure top and described substrate electrically connect.
Described arrangements of electric connection is a metallic conductor, and described metallic conductor one end is fixed on described shielded enclosure top, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, the ground connection on the described metallic conductor other end and the described substrate connects.
Described arrangements of electric connection is a metallic conductor, described metallic conductor one end is fixed on the described substrate, link to each other with the earthing position that is provided with on the described substrate, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, the described metallic conductor other end and described shielded enclosure top connect.
Described arrangements of electric connection comprises first metallic conductor and second metallic conductor, described first metallic conductor, one end is fixed on described shielded enclosure top, described second metallic conductor, one end is fixed on the described substrate, link to each other with the earthing position that is provided with on the described substrate, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, the described first metallic conductor other end and the described second metallic conductor other end connect.
Described metallic conductor is a metal clips.Described metal clips is a copper sheet.。
Compared to prior art, the utility model is by increasing several arrangements of electric connections in screening arrangement, the earthing position of described shielded enclosure top and described substrate is electrically connected, form electric field conducting loop, can reduce the electrical impedance of radome center effectively, strengthen the ground connection effect of radome center, thereby improve the shield effectiveness of electromagnetic screen greatly.
[description of drawings]
Fig. 1 is the three-dimensional exploded view of traditional electrical magnetic shielding device.
Fig. 2 is the three-dimensional exploded view of another angle of traditional electrical magnetic shielding device.
Fig. 3 is the sectional view of traditional electrical magnetic shielding device critical piece.
Fig. 4 is the three-dimensional exploded view of the utility model electromagnetic screen first embodiment.
Fig. 5 is the three-dimensional exploded view of the utility model electromagnetic screen first another angle of embodiment.
Fig. 6 is the sectional view of the utility model electromagnetic screen first embodiment critical piece.
Fig. 7 is the three-dimensional exploded view of the utility model electromagnetic screen second embodiment.
Fig. 8 is the three-dimensional exploded view of the utility model electromagnetic screen second another angle of embodiment.
Fig. 9 is the sectional view of the utility model electromagnetic screen second embodiment critical piece.
Figure 10 is the three-dimensional exploded view of the utility model electromagnetic screen the 3rd embodiment.
Figure 11 is the three-dimensional exploded view of the utility model electromagnetic screen the 3rd another angle of embodiment.
Figure 12 is the sectional view of the utility model electromagnetic screen the 3rd embodiment critical piece.
[embodiment]
See also Fig. 4, Fig. 5 and shown in Figure 6, a kind of electromagnetic screen, comprise a radome 20, a substrate 21, electronic component 22 and an earthing position 23 are arranged on the substrate 21, radome 20 has at least one shielded enclosure (only enumerating the situation of a shielded enclosure in the present embodiment), several copper metal clipss (only enumerating the situation of a metal clips 24 in the present embodiment) can be extended in described shielded enclosure top, when the ground connection of the sidewall of described radome 20 and described substrate 21 fastens or during solid welding, described electronic component 22 is housed in the shielded enclosure, the earthing position 23 that is provided with on metal clips 24 and the described substrate 21 connects, and makes earthing position 23 electric connections that described shielded enclosure top and described substrate 21 are corresponding.
See also Fig. 7, Fig. 8 and shown in Figure 9, a kind of electromagnetic screen, comprise a radome 30, a substrate 31, electronic component 32 and several copper metal clipss that link to each other with earthing position (only enumerating the situation of a metal clips 34 in the present embodiment) are arranged on the substrate 31, radome 30 has at least one shielded enclosure (only enumerating the situation of a shielded enclosure in the present embodiment), a contact zone 33 is arranged at described shielded enclosure top, when the ground connection of the sidewall of described radome 30 and described substrate 31 fastens or during solid welding, described electronic component 32 is housed in the shielded enclosure, metal clips 34 connects with the contact zone 33 at described shielded enclosure top, makes the earthing position electric connection that described shielded enclosure top and described substrate 31 are corresponding.
See also Figure 10, Figure 11 and shown in Figure 12, a kind of electromagnetic screen, comprise a radome 40, a substrate 41, electronic component 42 and several copper metal clipss that links to each other with earthing position are arranged on the substrate 41, i.e. second metal clips (only enumerating the situation of a metal clips 44 in the present embodiment), radome 40 has at least one shielded enclosure (only enumerating the situation of a shielded enclosure in the present embodiment), copper metal clips is extended in described shielded enclosure center, i.e. first metal clips situation of individual metal clips 43 (only enumerate in the present embodiment-), when the ground connection of the sidewall of described radome and described substrate 41 fastens or during solid welding, described electronic component 42 is housed in the shielded enclosure, first metal clips 43 and second metal clips 44 connect, and make described shielded enclosure top and described substrate 41 corresponding earthing positions electrically connect.
Radome in the foregoing description has all adopted the structure of a shielded enclosure, but in actual applications, also can have employing technical conceive of the present utility model on the radome of a plurality of shielded enclosures; Simultaneously, arrangements of electric connection shape and the material with described shielded enclosure top and the electric connection of described substrate earthing position also not only is confined to the foregoing description.
Can know that by experiment when close center, the position that arrangements of electric connection is connected with the radome top, the electrical impedance of radome is just more little, the shield effectiveness of radome is just better.
Provide one group to adopt screening arrangement of the present utility model below, in Dbtel with the test data on a mobile phone, before improving with improve after experimental data as shown in the table:
The performance test of table one screening arrangement
| Before the improvement | After the improvement | Effect | |
| Receiving sensitivity | -103dBm | -105dBm | Receiving sensitivity promotes 2dB |
| Radiation intensity | -31dBm | -37dBm | Radiated interference reduces 6dB |
| Annotate: reference receiver operating frequency 900MHz, stray radiation is got the reference point at 1800MHz place | |||
The utility model is by increasing several arrangements of electric connections in screening arrangement, the earthing position of described shielded enclosure top and described substrate is electrically connected, form electric field conducting loop, can reduce the electrical impedance of radome center effectively, strengthen the ground connection effect of radome center, thereby improve the shield effectiveness of electromagnetic screen greatly.
Claims (6)
1. an electromagnetic screen comprises a radome, and described radome has at least one shielded enclosure; Be applied on the substrate that contains several electronic components, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, described electronic component is contained in the described shielded enclosure, it is characterized in that: described screening arrangement also comprises several arrangements of electric connections, described arrangements of electric connection one end links to each other with described shielded enclosure top, the ground connection that is provided with on the other end and the described substrate links to each other, and makes the ground connection of described shielded enclosure top and described substrate electrically connect.
2. a kind of electromagnetic screen as claimed in claim 1, it is characterized in that: described arrangements of electric connection is a metallic conductor, described metallic conductor one end is fixed on described shielded enclosure top, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, the ground connection on the described metallic conductor other end and the described substrate connects.
3. a kind of electromagnetic screen as claimed in claim 1, it is characterized in that: described arrangements of electric connection is a metallic conductor, described metallic conductor one end is fixed on the described substrate, link to each other with the earthing position that is provided with on the described substrate, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, the described metallic conductor other end and described shielded enclosure top connect.
4. a kind of electromagnetic screen as claimed in claim 1, it is characterized in that: described arrangements of electric connection comprises first metallic conductor and second metallic conductor, described first metallic conductor, one end is fixed on described shielded enclosure top, described second metallic conductor, one end is fixed on the described substrate, link to each other with the earthing position that is provided with on the described substrate, when the ground connection of the sidewall of described radome and described substrate fastens or during solid welding, the described first metallic conductor other end and the described second metallic conductor other end connect.
5. as claim 2 or 3 or 4 described a kind of electromagnetic screens, it is characterized in that: described metallic conductor is a metal clips.
6. a kind of electromagnetic screen as claimed in claim 5 is characterized in that: described metal clips is a copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114043 CN2755913Y (en) | 2004-12-10 | 2004-12-10 | Electromagnetic shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114043 CN2755913Y (en) | 2004-12-10 | 2004-12-10 | Electromagnetic shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2755913Y true CN2755913Y (en) | 2006-02-01 |
Family
ID=35929540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420114043 Expired - Fee Related CN2755913Y (en) | 2004-12-10 | 2004-12-10 | Electromagnetic shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2755913Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236596A (en) * | 2013-04-07 | 2013-08-07 | 国家电网公司 | Self-shielding grounding line set device for extra-high voltage tests |
| CN105873384A (en) * | 2015-02-10 | 2016-08-17 | 罗伯特·博世有限公司 | Housing and control unit having a housing |
-
2004
- 2004-12-10 CN CN 200420114043 patent/CN2755913Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236596A (en) * | 2013-04-07 | 2013-08-07 | 国家电网公司 | Self-shielding grounding line set device for extra-high voltage tests |
| CN105873384A (en) * | 2015-02-10 | 2016-08-17 | 罗伯特·博世有限公司 | Housing and control unit having a housing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102441507B1 (en) | Disposition method of electronic device and electromagnetic interference suppressor | |
| CN101568251B (en) | Shielding structure | |
| US20090097223A1 (en) | Electromagnetic shielding device for printed circuit board | |
| CN1816272A (en) | Electrocircuit mode equipment | |
| WO2023202506A1 (en) | Device mainboard and electronic device | |
| US20120031661A1 (en) | Electromagnetic shielding device | |
| EP2199920B1 (en) | Method and apparatus for improving radio performance of wireless data terminal device | |
| RU2608170C2 (en) | Assembly of the socket for earphones and electronic equipment | |
| CN101212081B (en) | Double-row left-hand microstrip line for improving electromagnetic radiation of mobile telephone | |
| CN101166410A (en) | Electromagnetic interference shielding device and its applied electronic device | |
| CN2755913Y (en) | Electromagnetic shielding device | |
| US20040246187A1 (en) | Printed circuit board and wireless communication apparatus | |
| CN202635004U (en) | Electromagnetic shielding structure applied to electronic equipment | |
| CN2865033Y (en) | Delta-type antenna | |
| CN1114309C (en) | Mobile radio telephone | |
| CN114614242A (en) | Antenna device and electronic apparatus | |
| CN2840343Y (en) | Planar antenna | |
| US20170194695A1 (en) | Antenna device and mobile terminal | |
| US20040185924A1 (en) | Portable radiotelephone for providing a reduced specific absorption rate | |
| US20100032198A1 (en) | Circuit module | |
| CN1521888A (en) | Antenna and screening can combined construction and wireless transmission module thereof | |
| CN203205533U (en) | Antenna device | |
| JP2000059063A (en) | Shield case with opening | |
| CN2658974Y (en) | Transfer socket with shield filter | |
| JPH1167300A (en) | Terminal board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |