CN103076470A - Shielding method and shielding structure of radio frequency test circuit - Google Patents
Shielding method and shielding structure of radio frequency test circuit Download PDFInfo
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- CN103076470A CN103076470A CN2013100035966A CN201310003596A CN103076470A CN 103076470 A CN103076470 A CN 103076470A CN 2013100035966 A CN2013100035966 A CN 2013100035966A CN 201310003596 A CN201310003596 A CN 201310003596A CN 103076470 A CN103076470 A CN 103076470A
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Abstract
The invention discloses a shielding method and a shielding structure of a radio frequency test circuit. The shielding method comprises the following steps that a circuit board is provided with a timing single-side arrangement device and a partition layout circuit; the back side of the circuit board adopts the blind hole design, and a whole block of gold-plated copper sheet is solidly connected with the ground; the upper side and the lower side of the circuit board are respectively provided with a metal shielding cover, the shielding cover at the side of the device is provided with a movable upper cover, and the debugging is convenient; after the circuit is debugged, the movable upper cover is installed, and the device is sealed; and the shielding structure comprises a shielding box, the shielding box consists of a shielding cover, a shielding frame and a shielding board, the circuit board is arranged between the shielding frame and the shielding plate, the circuit board, the shielding frame and the shielding plate are tightly connected through screws, the shielding cover and the shielding frame are independently connected, and the shielding frame, the shielding cover and the circuit board are sealed through striped elastic conducting materials. Measures are adopted in two aspects including the circuit design and the structure design, and the goals of simple structure, small size, convenience in installation and debugging and good electromagnetic shielding effect are reached.
Description
Technical field
The present invention relates to the electronic surveying field, particularly relate to a kind of screen method and shielding construction of radio frequency testing circuit.
Background technology
The radio frequency testing circuit is the important component part of hyundai electronics fields of measurement, and application surface is extensive.Because its frequency of operation is higher, the electromagnetic radiation of generation is larger to the interference of sensitive circuit; Because the coupling effect effect, the interference between each circuit is also more.In order to improve the antijamming capability of circuit, the circuit to difference in functionality, different capacity carries out zoning usually when design circuit, and isolates with wider ground wire, prevents signal coupling.For strengthening isolation effect, with metal shielding box each Key Circuit is shielded again.
Common radio frequency testing circuit, it shields solution as shown in Figure 1: components and parts 5 are all arranged in circuit board 3 above and below; Respectively the subregion circuit on the circuit board 3 is carried out Isolated Shield by loam cake chamber 1 and lower cover chamber 4; Are connected with the lower cover chamber and connect with screw 2 in loam cake chamber 1, end face respectively with circuit board 3 on the ground connection shielding wire compress.Although this screen method can meet the demands, have following shortcoming: volume is excessive, particularly in the handheld instrument of limited space; The mounting screw that needs is more, and in order to prevent the electromagnetic leakage in slit, the spacing of screw is at several millimeters in theory; Circuit debugging is inconvenient, and shielding box needs could expose components and parts behind the complete removal, and owing to the shielding environment with final use state has larger difference, affects debug results.
Summary of the invention
The object of the present invention is to provide a kind of screen method and shielding construction of radio frequency testing circuit, the optimal design measure by circuit and structure two aspects are taked makes the radio frequency testing circuit be convenient to installment and debugging, and improves the shield effectiveness to circuit.
Technical scheme of the present invention:
A kind of screen method of radio frequency testing circuit is characterized in that, the method may further comprise the steps:
(1) single face is arranged components and parts during board design, with ground connection shielding wire zoning circuit;
(2) the blind hole design is adopted at the back side of circuit board, and the sturdy heart ground plane of gold plated copper of monoblock is set;
(3) the circuit board upper and lower faces all arranges metallic shield, is provided with movable top lid on the metallic shield of components and parts place face;
(4) circuit debugging complete after, movable top lid described in the installation steps (3) on metallic shield sealing components and parts get final product.
A kind of shielding construction of radio frequency testing circuit, it is characterized in that: the circuit board that includes conductively-closed, shielding box, shielding box includes screening cover, mask frame, barricade, screening cover and barricade are separately fixed at the upper and lower side of mask frame, described circuit board single face is arranged components and parts, zoning's circuit, the back side of circuit board is provided with the sturdy heart ground plane of gold plated copper of monoblock, described circuit board is installed between mask frame and the barricade, the solid ground plane at the upper surface of barricade and the back side of circuit board is close to, screening cover and mask frame separate connection, only need open screening cover and get final product complete exposed circuits components and parts, make things convenient for debugging circuit board.
The shielding construction of described radio frequency testing circuit, it is characterized in that: described mask frame is processed into corresponding individual cavity according to zoning's situation of the circuit on the circuit board, the above and below of the muscle wall of mask frame is processed with respectively groove, seal by the bar shaped elastic conducting material between mask frame and screening cover, the circuit board, the bar shaped elastic conducting material places groove, and the bar shaped elastic conducting material also is connected with ground connection shielding wire on the circuit board.
The shielding construction of described radio frequency testing circuit is characterized in that: described barricade adopts metal sheet to make.
The shielding construction of described radio frequency testing circuit is characterized in that: described bar shaped elastic conducting material adopts conductive rubber strip.
The shielding construction of described radio frequency testing circuit, it is characterized in that: fix by several screws between described screening cover and the mask frame, fix by several screws between circuit board and mask frame, the barricade, have the threaded hole of several and screw fit on the above and below of mask frame.
Advantage of the present invention is:
The present invention had both improved the shield effectiveness of radio circuit owing to requiring during circuit design back of circuit board without components and parts, without cable-through hole, had reduced again the overall height of conductively-closed device, thereby had reduced the technological requirement of whole shielding box height and making.
The present invention is segmented in each subregion circuit in the cavity of sealing with screening cover and mask frame, reduces electromagnetic interference (EMI).
The solid ground plane of barricade of the present invention and back of circuit board is adjacent to, and plays the effect of strengthening shielding, for reducing volume, makes with metal sheet.
The present invention is in order to reduce to connect the electromagnetic leakage in slit, between screening cover and the mask frame, seal with elastic conducting material between the ground connection shielding wire on mask frame and the circuit board.
The present invention is simple in structure, and volume is little, is convenient to Installation and Debugging, and effectiveness is good.
Description of drawings
Fig. 1 is the shielding solution schematic diagram of prior art.
Fig. 2 is that the present invention shields the solution schematic diagram.
Fig. 3 is the schematic perspective view of back of circuit board in the embodiment of the invention.
Fig. 4 is the schematic perspective view of mask frame in the embodiment of the invention.
Embodiment
In conjunction with Fig. 2, Fig. 3, the step of the screen method employing of radio frequency testing circuit of the present invention is described:
At first, during circuit board 3 design, adopt the methods such as gadget, compact arrangement that all components and parts 5 are arranged in one side; Circuit to difference in functionality, different capacity carries out zoning, and isolates with wider ground wire, prevents signal coupling.
Secondly, the blind hole design is adopted at the back side of circuit board 3, without any cable-through hole, reduces electromagnetic interference (EMI); The solid ground plane 12 of copper sheet of monoblock is arranged at the back side, adopts gold-plated processing to improve conductive capability.
Again, after components and parts 5 assemblings on the circuit board 3 are finished, circuit board 3 is installed in mask frame 6
And between the barricade 10.Fixing with screw 9, with conductive rubber strip 11 sealings.
At last, after circuit debugging is complete, with screw 8 screening cover 7 is fixed on the mask frame 6, finishes the sealing to components and parts.
In conjunction with Fig. 2, Fig. 3, Fig. 4, further specify the shielding construction of radio frequency testing circuit of the present invention:
Shielding box is comprised of screening cover 7, mask frame 6, barricade 10 3 parts, and circuit board 3 is installed between mask frame 6 and the barricade 10.The solid ground plane 12 at the upper surface of barricade 10 and circuit board 3 back sides is close to, and screw 9 passes barricade 10 and circuit board 3, utilizes the threaded hole 13 on the mask frame 6 fixing; Screening cover 7 is fixing with mask frame 6 usefulness screws 8.Between circuit board 3 and the mask frame 6, between screening cover 7 and the mask frame 6 all with conductive rubber strip 11 sealings that are installed in the muscle wall above and below of mask frame 6 groove 15.
Individual cavity is processed into by the circuit partition deployment scenarios in mask frame 6 inside, and muscle wall 14 is corresponding with ground connection shielding wire on the circuit board 3.For conductive rubber strip 11 is installed, at the muscle wall above and below of mask frame 6 working groove 15, groove 15 is communicated with fully, behind the installation conductive rubber strip 11, can form complete conductive seal chain.For screening cover 7 and barricade 10 are installed, thread mill drilling 13 on the mask frame 6, are used for mounting screw 8 and screw 9, because the elastic reaction of conductive rubber strip 11 can produce the connection slit hardly, the layout of threaded hole 13 does not need as common shielding box intensive.
During circuit debugging, only need open screening cover 7 can expose components and parts 5 fully, and at the shielding environment downward modulation examination circuit near final use state, circuit board 3 back sides need not debugged without components and parts.
Disturb and weight reduction in order to shield high-frequency electromagnetic, the shielding box part adopts aluminum alloy materials; In order to guarantee shield effectiveness, the shielding box piece surface adopts electric conductive oxidation to process.
Claims (6)
1. the screen method of a radio frequency testing circuit is characterized in that, the method may further comprise the steps:
(1) single face is arranged components and parts during board design, with ground connection shielding wire zoning circuit;
(2) the blind hole design is adopted at the back side of circuit board, and the sturdy heart ground plane of gold plated copper of monoblock is set;
(3) the circuit board upper and lower faces all arranges metallic shield, is provided with movable top lid on the metallic shield of components and parts place face;
(4) circuit debugging complete after, movable top lid described in the installation steps (3) on metallic shield sealing components and parts get final product.
2. shielding construction based on the screen method of the described radio frequency testing circuit of claim 1, it is characterized in that: the circuit board, the shielding box that include conductively-closed, shielding box includes screening cover, mask frame, barricade, screening cover and barricade are separately fixed at the upper and lower side of mask frame, described circuit board single face is arranged components and parts, zoning's circuit, the back side of circuit board is provided with the sturdy heart ground plane of gold plated copper of monoblock, described circuit board is installed between mask frame and the barricade, and the solid ground plane at the upper surface of barricade and the back side of circuit board is close to.
3. the shielding construction of radio frequency testing circuit according to claim 2, it is characterized in that: described mask frame is processed into corresponding individual cavity according to zoning's situation of the circuit on the circuit board, the above and below of the muscle wall of mask frame is processed with respectively groove, seal by the bar shaped elastic conducting material between mask frame and screening cover, the circuit board, the bar shaped elastic conducting material places groove, and the bar shaped elastic conducting material also is connected with ground connection shielding wire on the circuit board.
4. the shielding construction of radio frequency testing circuit according to claim 2 is characterized in that: described barricade adopts metal sheet to make.
5. the shielding construction of radio frequency testing circuit according to claim 2 is characterized in that: described bar shaped elastic conducting material employing conductive rubber strip.
6. the shielding construction of radio frequency testing circuit according to claim 2, it is characterized in that: fix by several screws between described screening cover and the mask frame, fix by several screws between circuit board and mask frame, the barricade, have the threaded hole of several and screw fit on the above and below of mask frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100035966A CN103076470A (en) | 2013-01-06 | 2013-01-06 | Shielding method and shielding structure of radio frequency test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100035966A CN103076470A (en) | 2013-01-06 | 2013-01-06 | Shielding method and shielding structure of radio frequency test circuit |
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| CN103076470A true CN103076470A (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013100035966A Pending CN103076470A (en) | 2013-01-06 | 2013-01-06 | Shielding method and shielding structure of radio frequency test circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682556A (en) * | 2013-11-13 | 2014-03-26 | 南京航空航天大学 | Airborne remote antenna mounting device |
| CN104931742A (en) * | 2015-07-14 | 2015-09-23 | 苏州高新区世纪福科技有限公司 | PCBA RF isolation apparatus |
| WO2016206320A1 (en) * | 2015-06-24 | 2016-12-29 | 中兴通讯股份有限公司 | Radio frequency power amplifier module and radio frequency communication device |
| CN107367648A (en) * | 2017-06-23 | 2017-11-21 | 中国电子科技集团公司第十三研究所 | Microwave monolithic circuit immunity to interference test fixture |
| CN108650869A (en) * | 2018-02-24 | 2018-10-12 | 深圳市信维通信股份有限公司 | A kind of compound shielding case |
| CN108683464A (en) * | 2018-04-20 | 2018-10-19 | 京信通信系统（中国）有限公司 | Antenna calibration network device and its shielding case |
| CN111727376A (en) * | 2018-11-09 | 2020-09-29 | 皇家飞利浦有限公司 | Radio frequency power amplifier and assembling method thereof |
| CN112911918A (en) * | 2021-01-27 | 2021-06-04 | 深圳市宏联电路有限公司 | Printed circuit board for inhibiting electromagnetic interference |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6219258B1 (en) * | 1999-01-29 | 2001-04-17 | Ericsson Inc. | Electronic enclosure with improved environmental protection |
| US20050236171A1 (en) * | 2004-04-23 | 2005-10-27 | Garcia Jorge L | Shield frame for a radio frequency shielding assembly |
| CN2802909Y (en) * | 2005-05-20 | 2006-08-02 | 深圳市深奥通信有限公司 | Radio-frequency module cavity |
| CN101002520A (en) * | 2004-07-08 | 2007-07-18 | 安德鲁公司 | Shielding device in a base station |
| CN201213351Y (en) * | 2008-06-18 | 2009-03-25 | 中兴通讯股份有限公司 | Shielding cover for electromagnetically shielding circuit board and electronic device |
| CN201408842Y (en) * | 2009-05-14 | 2010-02-17 | 江苏指南针导航通信技术有限公司 | Double-frequency active receiving antenna of GPS and No.1 beidou system |
| CN202364529U (en) * | 2011-12-08 | 2012-08-01 | 北京北大千方科技有限公司 | Vehicle-mounted equipment |
-
2013
- 2013-01-06 CN CN2013100035966A patent/CN103076470A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6219258B1 (en) * | 1999-01-29 | 2001-04-17 | Ericsson Inc. | Electronic enclosure with improved environmental protection |
| US20050236171A1 (en) * | 2004-04-23 | 2005-10-27 | Garcia Jorge L | Shield frame for a radio frequency shielding assembly |
| CN101002520A (en) * | 2004-07-08 | 2007-07-18 | 安德鲁公司 | Shielding device in a base station |
| CN2802909Y (en) * | 2005-05-20 | 2006-08-02 | 深圳市深奥通信有限公司 | Radio-frequency module cavity |
| CN201213351Y (en) * | 2008-06-18 | 2009-03-25 | 中兴通讯股份有限公司 | Shielding cover for electromagnetically shielding circuit board and electronic device |
| CN201408842Y (en) * | 2009-05-14 | 2010-02-17 | 江苏指南针导航通信技术有限公司 | Double-frequency active receiving antenna of GPS and No.1 beidou system |
| CN202364529U (en) * | 2011-12-08 | 2012-08-01 | 北京北大千方科技有限公司 | Vehicle-mounted equipment |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103682556A (en) * | 2013-11-13 | 2014-03-26 | 南京航空航天大学 | Airborne remote antenna mounting device |
| CN103682556B (en) * | 2013-11-13 | 2015-12-30 | 南京航空航天大学 | A kind of airborne remote antenna erecting device |
| WO2016206320A1 (en) * | 2015-06-24 | 2016-12-29 | 中兴通讯股份有限公司 | Radio frequency power amplifier module and radio frequency communication device |
| CN104931742A (en) * | 2015-07-14 | 2015-09-23 | 苏州高新区世纪福科技有限公司 | PCBA RF isolation apparatus |
| CN107367648A (en) * | 2017-06-23 | 2017-11-21 | 中国电子科技集团公司第十三研究所 | Microwave monolithic circuit immunity to interference test fixture |
| CN107367648B (en) * | 2017-06-23 | 2023-07-04 | 中国电子科技集团公司第十三研究所 | Microwave monolithic circuit immunity test fixture |
| CN108650869A (en) * | 2018-02-24 | 2018-10-12 | 深圳市信维通信股份有限公司 | A kind of compound shielding case |
| CN108650869B (en) * | 2018-02-24 | 2023-08-11 | 深圳市信维通信股份有限公司 | Composite shielding cover |
| CN108683464A (en) * | 2018-04-20 | 2018-10-19 | 京信通信系统（中国）有限公司 | Antenna calibration network device and its shielding case |
| CN111727376A (en) * | 2018-11-09 | 2020-09-29 | 皇家飞利浦有限公司 | Radio frequency power amplifier and assembling method thereof |
| CN112911918A (en) * | 2021-01-27 | 2021-06-04 | 深圳市宏联电路有限公司 | Printed circuit board for inhibiting electromagnetic interference |
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Application publication date: 20130501 |