CN103687282A - Ultra-wide band electromagnetic band-gap structure - Google Patents
Ultra-wide band electromagnetic band-gap structure Download PDFInfo
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- CN103687282A CN103687282A CN201310641363.9A CN201310641363A CN103687282A CN 103687282 A CN103687282 A CN 103687282A CN 201310641363 A CN201310641363 A CN 201310641363A CN 103687282 A CN103687282 A CN 103687282A
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Abstract
The invention is applied to the field of printed circuit boards, and particularly relates to an ultra-wide band electromagnetic band-gap structure applied to power planes of printed circuit boards. The elementary cell of the ultra-wide band electromagnetic band-gap structure consists of spinning branches and slots of square metal patches. The spinning branches of the elementary cell of the electromagnetic band-gap structure surround the square metal patches. The slots are etched on the metal patches of the elementary cell of the electromagnetic band-gap structure. Four sides of the metal patches of the elementary cell of the electromagnetic band-gap structure are grooved. The electromagnetic band-gap structure has wider bandwidth and lower cut-off frequency, basically covers noise band of noises of a synchronous switch, and can eliminate noises of the synchronous switch between the power planes and the ground plane omnidirectionally. The ultra-wide band electromagnetic band-gap structure produced by the conventional printed circuit board manufacturing process is easy to realize and has high benefit.
Description
Technical field
The present invention is applied to printed circuit board field, particularly relates to a kind of ultra wide band electrically ultra wide that is applied to printed circuit board power plane.
Background technology
Along with the development of Modern High-Speed digital circuit, quick edge climbing speed, the reasons such as high clock rate and low voltage level make the simultaneous switching noise problem between power plane and ground level become more and more outstanding.Simultaneous switching noise is during by the electric current Simultaneous Switching of a plurality of active devices on printed circuit board (PCB), and between power plane and ground level, multiple mode of resonance causes, and simultaneous switching noise can cause the problems such as signal integrity and electromagnetic compatibility.Printed circuit board (PCB) is again a very important ring as a ring of electromagnetic compatibility in system, therefore how to eliminate the difficult problem that the simultaneous switching noise in high speed circuit has just become circuit designer to solve.In order to suppress simultaneous switching noise, people have proposed several different methods perhaps, such as.Wherein between power supply and ground level, increasing decoupling capacitor is exactly the most frequently used method, but when frequency is during higher than 600MHz, in decoupling capacitor, there is stray inductance, stray inductance can produce self-resonance with capacitor, limited frequency bandwidth, usually decoupling capacitor invalid and typical simultaneous switching noise when higher than 600MHz frequency application has the low pass frequency spectrum lower than 6GHz, therefore adopts the bypass technology of decoupling capacitor can not solve high frequency simultaneous switching noise problem.A kind of new solution urgently proposes.
Summary of the invention
The object of this invention is to provide and a kind ofly can effectively reduce cut-off frequency, improve bandwidth of rejection, its simultaneous switching noise suppression characteristic is better than traditional Z-bridged electromagnetic bandgap structure, and adopt existing conventional printed circuit board manufacturing process, be easy to realize the ultra wide band electrically ultra wide of high efficiency.
Realizing the object of the invention technical scheme is: a kind of ultra wide band electrically ultra wide, is characterized in that: at least comprise non-conductive substrate, non-conductive substrate top and bottom are covered with metallic plate, and metallic plate is etched into electro-magnetic bandgap unit spaced apart; Electro-magnetic bandgap unit consists of the stretch out L-bridged EBG construction unit of conductor lines and another face of the square body of a face of non-conductive substrate and four limits of square body, four limits conductor lines that stretches out is vertical with four limits of square body, four limits conductor lines that stretches out stretches out from fillet 1/3-1/4 position, open initial point near square body vertical centre line position, the non-conductive gap, conductor lines both sides that stretches out in square body is at 0.2mm; Four limits conductor lines that stretches out becomes 3 vertical bendings, forms parallel foldingly with the corresponding sides of square body, and 3 vertical bendings produce 4 limits, and article one limit is in square body, and length is between the 3/6-2/6 of the square body length of side; Second limit is parallel with square body limit, and length is between the 4/5-3/5 of the square body length of side; Article three, limit is short, and length is between the 1/20-3/20 of the square body length of side; Four edges is between the 1/10-2/10 of the square body length of side; Second limit, the 3rd limit, four edges form first " U " character form structure; The conductor lines that stretches out in square body folds for 1 time in square body, forms two limits, and one overlaps with described article one limit, and the 5th limit is vertical with article one limit, and the length on the 5th limit is between the length of side 3/6-2/6 of square body; Article five, limit, article one limit, second limit form second " U " character form structure; First " U " character form structure is contrary with second " U " character form structure opening; Square body and lower square body center superposition, corresponding sides are parallel.
Described electro-magnetic bandgap unit is two, distributes side by side.
Described electro-magnetic bandgap unit is nine, and nine are scattered in 3*3 square.
Described electro-magnetic bandgap element thickness 0.4mm.
Described L-bridged EBG construction unit consists of four limits of lower square body and lower square body conductor extension line that stretches out, four limits conductor extension line that stretches out is vertical with four limits of lower square body, four limits conductor extension line that stretches out stretches out from fillet 1/3-1/4 position, open initial point from lower square body edge, through being once bent to form vertically upward two perpendicular edge, the perpendicular edge that connects lower square body limit is short, second vertical length of side.
The present invention has the following advantages compared with prior art:
Its elementary cell is by the type branch that spins, square-shaped metal paster gap and form.Spin type branch in the elementary cell of electromagnetic bandgap structure is around square-shaped metal paster.Etching gap on metal patch in electromagnetic bandgap structure elementary cell.Metal patch surrounding fluting in electromagnetic bandgap structure elementary cell.This structure has wider relative bandwidth and lower cut-off frequency, substantially covers the noise band of simultaneous switching noise, can omnidirectional eliminate the simultaneous switching noise between power plane and ground level.
The present invention adopts existing conventional printed circuit board manufacturing process, is easy to realize high efficiency.
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1 structural representation;
Fig. 2 is the embodiment of the present invention 2 structural representations;
Fig. 3 is electro-magnetic bandgap cellular construction schematic diagram;
Fig. 4 is L-bridged EBG construction unit schematic diagram;
Fig. 5 is the S of IS EBG
21parameter comparison;
Fig. 6 is the S of IS EBG
31parameter comparison;
Fig. 7 is the S of IS EBG
21and S
31parameter comparison.
In figure, 1, non-conductive substrate; 2, metallic plate; 3, electro-magnetic bandgap unit; 4, square body; 5, four limits conductor lines that stretches out; 6, L-bridged EBG construction unit; 7, open initial point; 8, center line; 9, the conductor lines that stretches out in square body; 10, non-conductive gap; 11, lower square body; 12, conductor extension line.
Embodiment
As shown in Figure 1, a kind of ultra wide band electrically ultra wide, at least comprises non-conductive substrate 1, and non-conductive substrate 1 top and bottom are covered with metallic plate 2, and metallic plate 2 is etched into electro-magnetic bandgap unit 3 spaced apart; Electro-magnetic bandgap unit 3 spaced apart is two, distributes side by side.
As shown in Figure 2, a kind of ultra wide band electrically ultra wide, at least comprises non-conductive substrate 1, and non-conductive substrate 1 top and bottom are covered with metallic plate 2, and metallic plate 2 is etched into electro-magnetic bandgap unit 3 spaced apart; Electro-magnetic bandgap unit 3 spaced apart is nine, and nine are scattered in 3*3 square.
As shown in Figure 3, electro-magnetic bandgap unit 3 consists of the stretch out L-bridged EBG construction unit 6 of conductor lines 5 and another face of the square body 4 of 1 one faces of non-conductive substrate and four limits of square body, four limits conductor lines 5 that stretches out is vertical with four limits of square body 4, four limits conductor lines 5 that stretches out stretches out from fillet 1/3-1/4 position, open initial point 7 near square body vertical center line 8 positions, the conductor lines 9 non-conductive gaps 10, both sides that stretch out in square body are at 0.2mm; 5 one-tenth 3 vertical bendings of extension conductor lines outside square body, form parallel folding with the corresponding sides of square body 4, and 3 vertical bendings produce 4 limits, and article one limit is in square body, and length is between the 3/6-2/6 of square body 4; Second limit is parallel with square body limit, and length is between the 4/5-3/5 of square body limit; Article three, limit is short, and length is between the 1/20-3/20 of the square body length of side; Four edges is between the 1/10-2/10 of the square body length of side; Second limit, the 3rd limit, four edges form first " U " character form structure; The conductor lines 9 that stretches out in square body folds for 1 time in square body, form two limits, article one, overlap with described article one limit, second (or the 5th limit) is vertical with article one limit, and the length on the 5th limit is between the length of side 3/6-2/6 of square body 4.Article five, limit, article one limit, second limit form second " U " character form structure; First " U " character form structure is contrary with second " U " character form structure opening.
Electro-magnetic bandgap unit 3 thickness 0.4mm.
As shown in Figure 4, L-bridged EBG construction unit 6 consists of the conductor extension line 12 of lower square body 11 and lower square body 11, conductor extension line 12 is vertical with four limits of lower square body 11, conductor extension line 12 stretches out from fillet 1/3-1/4 position, open initial point from lower square body 11 edges, through being once bent to form vertically upward two perpendicular edge, the perpendicular edge that connects lower square body 11 limits is short, 0.65mm in embodiment, width is 0.2 mm; Second vertical length of side, in embodiment, second vertical length of side is 15.2 mm, width is 0.1 mm.
Below by emulation, the inhibition to simultaneous switching noise when test the present invention is applied to power plane, concrete steps are as follows:
(1) the electromagnet bandgap structure etching of 3 * 3 rectangle elementary cell arrays is embedded to power plane, the Double-layered printing plate of selection is of a size of 90 mm * 0.4, mm * 90 mm, and substrate dielectric material is FR4, its relative dielectric constant
, loss angle tangent
, ground level keeps continuous whole, as shown in Figure 2.Wherein, spin type, around etching gap on metal patch, metal patch and metal patch surrounding fluting, is directly in order to strengthen the inductance between adjacent metal patch.
(2) be positioned at coordinate (45mm, 45mm), (75mm, 45mm), locates for (75mm, 75mm) 3, loads respectively 3 test ports, and simulation frequency section is 0-11GHz.Utilize Anosoft HFSS software emulation, simulation curve is as shown in Fig. 5, Fig. 6, Fig. 7, consider to suppress the degree of depth and be-during 30dB, S21 by the known new E BG of simulation curve result is 130MHz-10.7GHz, S31 is 130MHz-10.45GHz, and effective bandwidth of rejection of new E BG structure is 10.32GHz.Z-bridged EBG bandwidth is 260MHz-6.76GHz, and the simulation result S21 of Z-bridged EBG is 390MHz-6.4GHz, and S31 is 330MHz-6.55GHz, considers the difference that actual test and emulation exist, and this species diversity is acceptable.New E BG structure and Z-bridged EBG structure comparison relative bandwidth have increased by 58.8%, and low-frequency cut-off frequency has reduced 130MHz, substantially covers the noise band of simultaneous switching noise.
The simultaneous switching noise suppression characteristic of electro-magnetic bandgap power plane of the present invention is better than the power plane that traditional Z-bridged electromagnetic bandgap structure is made, can omnidirectional suppress the simultaneous switching noise in power plane, and there is the advantage that can adopt standard printed circuit board technique to make, cost is low, high efficiency.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (5)
1. a ultra wide band electrically ultra wide, is characterized in that: at least comprise non-conductive substrate (1), non-conductive substrate (1) top and bottom are covered with metallic plate (2), and metallic plate (2) is etched into electro-magnetic bandgap unit (3) spaced apart; Electro-magnetic bandgap unit (3) consists of the stretch out L-bridged EBG construction unit (6) of conductor lines (5) and another face of the square body (4) of (1) face of non-conductive substrate and four limits of square body, four limits conductor lines (5) that stretches out is vertical with four limits of square body (4), four limits conductor lines (5) that stretches out stretches out from fillet 1/3-1/4 position, open initial point (7) near square body vertical center line (8) position, the non-conductive gaps, the conductor lines that stretches out (9) both sides (10) in square body are at 0.2mm; Four limits conductor lines (5) that stretches out becomes 3 vertical bendings, form parallel folding with the corresponding sides of square body (4), 3 vertical bendings produce 4 limits, and article one limit is in square body, and length is between the 3/6-2/6 of square body (4) length of side; Second limit is parallel with square body limit, and length is between the 4/5-3/5 of the square body length of side; Article three, limit is short, and length is between the 1/20-3/20 of the square body length of side; Four edges is between the 1/10-2/10 of the square body length of side; Second limit, the 3rd limit, four edges form first " U " character form structure; The conductor lines that stretches out (9) in square body folds for 1 time in square body, form two limits, article one, overlap with described article one limit, the 5th limit is vertical with article one limit, and the length on the 5th limit is between the length of side 3/6-2/6 of square body (4); Article five, limit, article one limit, second limit form second " U " character form structure; First " U " character form structure is contrary with second " U " character form structure opening; Square body (4) and lower square body (11) center superposition, corresponding sides are parallel.
2. a kind of ultra wide band electrically ultra wide according to claim 1, is characterized in that: described electro-magnetic bandgap unit (3) is two, distributes side by side.
3. a kind of ultra wide band electrically ultra wide according to claim 1, is characterized in that: described electro-magnetic bandgap unit (3) is nine, and nine are scattered in 3*3 square.
4. a kind of ultra wide band electrically ultra wide according to claim 1, is characterized in that: described electro-magnetic bandgap unit (3) thickness 0.4mm.
5. a kind of ultra wide band electrically ultra wide according to claim 1, it is characterized in that: described L-bridged EBG construction unit (6) consists of four limits of lower square body (11) and lower square body (11) conductor extension line (12) that stretches out, four limits conductor extension line (12) that stretches out is vertical with four limits of lower square body (11), four limits conductor extension line (12) that stretches out stretches out from fillet 1/3-1/4 position, open initial point from lower square body (11) edge, through being once bent to form vertically upward two perpendicular edge, the perpendicular edge that connects lower square body (11) limit is short, second vertical length of side.
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| CN201310641363.9A CN103687282A (en) | 2013-12-04 | 2013-12-04 | Ultra-wide band electromagnetic band-gap structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997200A (en) * | 2014-05-20 | 2014-08-20 | 浙江工业大学 | Power distribution network based on plane C-type bridge electromagnetic band gap structure |
| CN106604528A (en) * | 2015-12-22 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Electromagnetic band gap structure for suppressing simultaneous switching noise in digital circuit |
| CN109041413A (en) * | 2018-10-31 | 2018-12-18 | 中国工程物理研究院电子工程研究所 | A kind of depth inhibits the electromagnetic bandgap structure of ultra wide band simultaneous switching noise |
| CN110012596A (en) * | 2019-05-09 | 2019-07-12 | 苏州浪潮智能科技有限公司 | A kind of printed circuit board and its design method based on electromagnetic band gap EBG structure |
| CN110087384A (en) * | 2019-03-27 | 2019-08-02 | 海宁利伊电子科技有限公司 | Applied to the electro-magnetic bandgap bus plane structure in high speed package system |
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| US20050104678A1 (en) * | 2003-09-11 | 2005-05-19 | Shahrooz Shahparnia | System and method for noise mitigation in high speed printed circuit boards using electromagnetic bandgap structures |
| CN102497729A (en) * | 2011-12-07 | 2012-06-13 | 苏州日月明微电子科技有限公司 | Electromagnetic band-gap structure |
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2013
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Patent Citations (2)
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| US20050104678A1 (en) * | 2003-09-11 | 2005-05-19 | Shahrooz Shahparnia | System and method for noise mitigation in high speed printed circuit boards using electromagnetic bandgap structures |
| CN102497729A (en) * | 2011-12-07 | 2012-06-13 | 苏州日月明微电子科技有限公司 | Electromagnetic band-gap structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997200A (en) * | 2014-05-20 | 2014-08-20 | 浙江工业大学 | Power distribution network based on plane C-type bridge electromagnetic band gap structure |
| CN103997200B (en) * | 2014-05-20 | 2017-01-11 | 浙江工业大学 | Power distribution network based on plane C-type bridge electromagnetic band gap structure |
| CN106604528A (en) * | 2015-12-22 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | Electromagnetic band gap structure for suppressing simultaneous switching noise in digital circuit |
| CN109041413A (en) * | 2018-10-31 | 2018-12-18 | 中国工程物理研究院电子工程研究所 | A kind of depth inhibits the electromagnetic bandgap structure of ultra wide band simultaneous switching noise |
| CN110087384A (en) * | 2019-03-27 | 2019-08-02 | 海宁利伊电子科技有限公司 | Applied to the electro-magnetic bandgap bus plane structure in high speed package system |
| CN110087384B (en) * | 2019-03-27 | 2024-04-05 | 海宁利伊电子科技有限公司 | Electromagnetic band gap power supply layer structure applied to high-speed packaging system |
| CN110012596A (en) * | 2019-05-09 | 2019-07-12 | 苏州浪潮智能科技有限公司 | A kind of printed circuit board and its design method based on electromagnetic band gap EBG structure |
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