CN103683904A - Power source distribution network with small electromagnetic band gap structure units - Google Patents
Power source distribution network with small electromagnetic band gap structure units Download PDFInfo
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- CN103683904A CN103683904A CN201310661854.XA CN201310661854A CN103683904A CN 103683904 A CN103683904 A CN 103683904A CN 201310661854 A CN201310661854 A CN 201310661854A CN 103683904 A CN103683904 A CN 103683904A
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Abstract
The invention discloses a power source distribution network with small electromagnetic band gap structure units. An electromagnetic band gap structure is etched on a power source surface of the power source distribution network, the ground keeps complete based on the consideration of completeness of signals, and basic units of the plane electromagnetic band gap structure are composed of complementary split ring resonators. The power source distribution network with the small electromagnetic band gap structure units effectively resolves the problem of noise suppression of a synchronous switch in a mixing circuit system, and compared with other typical plane electromagnetic band gap structures, the size of the unit structure can be reduced. In addition, the noise suppression performance of the power source distribution network is hardly influenced by the tiny variation of the size, and the power source distribution network is good in robustness and can be effectively applied to a high-speed multi-layer circuit design.
Description
Technical field
The present invention relates to a kind of power distribution network of electromagnetic bandgap structure unit small-sized, be specifically related to a kind of for solving the power distribution network of mixing high-speed circuit system Power Integrity problem.
Background technology
Along with the development of integrated circuit and system in package technology, hybrid circuit system closeness is more and more higher, and high-speed digital circuit, radio frequency/analog circuit, memory and sensor circuit module all need to be integrated in same system.Past problems of Signal Integrity is the selective analysis object of Design of Digital Circuit, yet along with the improving constantly of application band, it is all the more important that Power Integrity problem also seems day by day.
In high-speed digital circuit, when numerous pins of chip saltus step occur, can cause the larger transient current ground of flowing through simultaneously, be subject to distributed inductance around and the coupling influence of distributed capacitance, will produce simultaneous switching noise (SSN).If noise is coupled on noise-sensitive circuit (as radio frequency/analogue device) by power distribution network, serious phase-locked loop shake and the phase noise of radio-frequency oscillator will be caused, and the increase with the error rate that reduces that can produce sequential tolerance limit, noise margin, the noise isolation between chip or circuit module is called an emphasis of PDN design.And the clock operating rate of hybrid circuit system high speed digital circuit is constantly accelerated, signal rise/fall along the time constantly shorten, supplying DC voltage drop constantly reduces, Power Integrity problem is day by day serious, simultaneous switching noise problem will become restriction high speed integrated circuit development Main Bottleneck it.Between power/ground planes, can form slab guide, can be produced resonance by SSN excitation, thus promote SSN plane between propagate.Especially when the uprising of the application band of circuit (GHz), simultaneous switching noise will to the signal integrity in high-speed circuit system and power supply is complete produces serious influence, and also can cause serious electromagnetic interference problem simultaneously.Therefore, how to design the solution simultaneous switching noise problem that suitable power distribution network is come wide stopband, high inhibition degree, guarantee signal integrity and the electromagnetism integrity issue of circuit simultaneously, day by day become the study hotspot in system in package.
Electromagnetic bandgap structure (EBG) is a kind of artificial electromagnetic material being comprised of lossy dielectric, conductor metal or other mixtures.It is particular resonance mechanism, by the coupling between metal unit and dielectric, forms resonant element, utilizes the resonance effect of construction unit self, forms high impedance surface, stops near the surface wave propagation of resonance frequency, then forms certain frequency band gap.The stopband center frequency of EBG construction unit is only relevant with the resonance frequency of particular resonance unit, and irrelevant with the cycle size of structure.In addition, plane EBG structure is comparatively easily processed realization with the printed circuit board technology of standard, is therefore commonly used to improve the performance of microwave device and antenna, is also more and more applied to the SSN noise suppressed research of high speed circuit now.
At present, in the EMC Design of high-speed hybrid circuits system, with thering is frequency band gap characteristic electromagnetic bandgap structure, suppress simultaneous switching noise and be roughly divided into two classes, a kind of is mushroom-shaped EBG structure, its elementary cell is between power plane and ground level, to design special through hole and additional interplanar metal patch, need three-layer metal to realize, and be a kind of multilayer circuit, can increase design cost; Another is plane EBG structure, the mushroom-shaped EBG structure of comparing, and it is convenient to adopt standard printed circuit board technique to process, and low price.In order to improve SSN noise suppression feature, to reduce low-frequency cut-off frequency, the improvement of plane EBG structure mainly contains following several form: L-bridge EBG structure, S-bridge EBG structure, EBG structure of cascade low frequency and high frequency unit etc.Yet for when guaranteeing noise suppressed performance, how to reduce EBG construction unit size and but rarely have research.
And in fact, utilizing plane EBG structure to solve in the design of SSN noise problem, because EBG is a kind of periodic distribution structure, it understands the return path of inevitable break current, can have influence on to a great extent the signal integrity of power distribution network.
Summary of the invention
In order to overcome the defect of above-mentioned prior art existence, the invention provides a kind of power distribution network of electromagnetic bandgap structure unit small-sized, the elementary cell of electromagnetic bandgap structure is comprised of complementary split-rings resonator; Electromagnetic bandgap structure is etched on the voltage plane at power distribution networking, consideration based on signal integrity, it is complete that ground keeps, when reaching wide stopband inhibition simultaneous switching noise performance, compare with other typical plane electromagnetic bandgap structures, the present invention can reduce the size of cellular construction.
For achieving the above object, the concrete scheme that the present invention adopts is as follows:
The invention provides a kind of power distribution network of electromagnetic bandgap structure unit small-sized, it is characterized in that: comprise electromagnetic bandgap structure and complementary split-rings resonator, described electromagnetic bandgap structure is a kind of periodic distribution, its elementary cell is comprised of complementary split-rings resonator, simultaneous switching noise between power supply and ground level is suppressed, in mixing high-speed circuit system, comprise noise source circuit and noise-sensitive circuit part, wherein said noise source circuit is by high-speed digital circuit, speed-sensitive switch power supply forms, described noise-sensitive circuit is comprised of radio circuit and analog circuit, and be distributed in zones of different, the described electromagnetic bandgap structure of design has covered the region at noise source circuit and noise-sensitive circuit place, be used for suppressing noise transmission each other.
Described electromagnetic bandgap structure is a kind of artificial electromagnetic material, in certain frequency range, has stopband characteristic, is used for the propagation of noise signal to suppress.
Described electromagnetic bandgap structure has microwave opposite sex medium, when electric field axially incides resonator surface, can produce negative dielectric constant, form a precipitous transmission forbidden band, described complementary split-rings resonator size is less, reach identical low-frequency cut-off frequency and noise suppression feature, thereby reduce the successional impact in return current path on holding wire.
The power plane of described power distribution network is formed by plane electromagnetic bandgap structure etching, has guaranteed that signal integrity is unaffected, and it is complete that ground level keeps.
What described power distribution network was used is FR-4 medium substrate, is lossy dielectric material, relative dielectric constant=4.4, dielectric thickness=0.2mm, the metal thickness=35um of dielectric surface, loss angle tangent=0.02.
Described electromagnetic bandgap structure is local to be connected with SMA coaxial fitting, by vector network analyzer, measures noise coupling transmission coefficient.
The above-mentioned power distribution network of the present invention, when take-40dB is during as noise suppressed standard, this power distribution network can suppress simultaneous switching noise in 0.56GHz-5.88GHz frequency range.The present invention can effectively reduce the size of electromagnetic bandgap structure unit, reduces the successional impact in holding wire return current path.
Beneficial effect of the present invention: effectively solve in high-speed hybrid circuits system because transient current changes caused voltage fluctuation problem, can significantly suppress the simultaneous switching noise producing in power distribution network, reduce radio frequency in hybrid circuit system/analog circuit to produce and disturb, avoid causing the misoperation of chip; By form the elementary cell of electromagnetic bandgap structure by complementary split-rings resonator, can, in the noise suppressed performance while that reaches expection, effectively reduce the size of cellular construction; By optimizing the size of complementary split-rings resonator, can change the resonance characteristic of electromagnetic bandgap structure unit, control the low-frequency cut-off frequency of noise suppressed, increase noise suppressed range of frequency bandwidths; By using, form electromagnetic bandgap structure carry out designing power supply distribution network by complementary split-rings resonator, noise suppressed performance is to being subject to the faint variable effect of resonator dimensions less, and robustness is better, can effectively apply to the design of actual multiple layer high speed circuit.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of power distribution network;
Fig. 2 is the schematic diagram of complementary openings resonator element;
Fig. 3 is the noise suppressed transmission coefficient figure of each port;
Fig. 4 is the noise suppressed performance comparison figure of institute's invention structure and other typical electrical ultra wide;
Fig. 5 is test result and the simulation result comparison diagram of institute's invention structure;
Fig. 6 is the result figure that the noise suppressed performance of institute's invention structure is changed by complementary split-rings resonator size d;
Fig. 7 is the result figure that the noise suppressed performance of institute's invention structure is changed by complementary split-rings resonator size s;
Fig. 8 is the result figure that the noise suppressed performance of institute's invention structure is changed by complementary split-rings resonator size w;
Fig. 9 is the result figure that the noise suppressed performance of institute's invention structure is changed by complementary split-rings resonator size g.
Embodiment
In order to make technological means of the present invention, creation characteristic and to reach object, be easy to understand understanding, below in conjunction with specific embodiment, further set forth the present invention.
As shown in Figure 1, be the three-dimensional structure schematic diagram of power distribution network involved in the present invention.The electromagnetic bandgap structure being comprised of complementary split-rings resonator is etched on voltage plane, wherein 1 represents voltage plane, and 2 represent complete ground.
As shown in Figure 2, be the schematic diagram of complementary openings resonator element involved in the present invention.Wherein d representative forms the size of square patch in complementary split-rings resonator, and s representative forms the size of complementary split-rings resonator sinual costa, and w representative forms the size of connecting bridge in complementary split-rings resonator; G representative forms the size of complementary split-rings resonator split shed.
As shown in Figure 3, shown the noise suppressed result figure between each port in power distribution network structure involved in the present invention, as seen from the figure, when noise is when port one produces, because electromagnetic bandgap structure has stoped electromagnetic transmission, at other 3 port position place noises, can well be inhibited.
As shown in Figure 4, the result comparison diagram that has shown the noise suppressed performance of power distribution network structure involved in the present invention and other typical electromagnetic bandgap structures, from comparison diagram, compare with other structures, when size is identical, adopt complementary split-rings resonator to form electromagnetic bandgap structure, noise suppressed frequency range wants wide and low-frequency cut-off frequency is little.
As shown in Figure 5, shown test result and the simulation result comparison diagram of power distribution network structure involved in the present invention, from comparison diagram, simulation result and test result are substantially identical, have reached the noise suppression effect of the high inhibition degree of broadband of estimating.
As shown in Figure 6, shown the noise suppressed performance of power distribution network structure involved in the present invention, the comparison diagram that changed by complementary split-rings resonator size d, from comparison diagram, when the size d of complementary split-rings resonator becomes large, noise suppressed performance improves, and low-frequency cut-off frequency reduces.
As shown in Figure 7, shown the noise suppressed performance of power distribution network structure involved in the present invention, the comparison diagram that changed by complementary split-rings resonator size s, from comparison diagram, when the size s of complementary split-rings resonator changes, noise suppressed performance impact is very little, basic not change.
As shown in Figure 8, shown the noise suppressed performance of power distribution network structure involved in the present invention, the comparison diagram that changed by complementary split-rings resonator size w, from comparison diagram, when the size w of complementary split-rings resonator changes, noise suppressed performance impact is very little, basic not change.
As shown in Figure 9, shown the noise suppressed performance of power distribution network structure involved in the present invention, the comparison diagram that changed by complementary split-rings resonator size g, from comparison diagram, when the size g of complementary split-rings resonator changes, noise suppressed performance impact is very little, basic not change.
To sum up, the designed power distribution network structure of the present invention is at using-40dB during as noise suppressed reference value, can in the range of frequency bandwidths of 0.56GHz-5.88GHz, to simultaneous switching noise, suppress, visible, the present invention can effectively solve simultaneous switching noise in hybrid circuit system and suppress problem, and compare with other typical plane electromagnetic bandgap structures, can also reduce the size of cellular construction.In addition, noise suppressed performance is subject to the faint variable effect of size less, and robustness is better, can effectively apply to the design of high speed multilayer circuit
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. the power distribution network of an electromagnetic bandgap structure unit small-sized, it is characterized in that: comprise electromagnetic bandgap structure and complementary split-rings resonator, described electromagnetic bandgap structure is a kind of periodic distribution, its elementary cell is comprised of complementary split-rings resonator, simultaneous switching noise between power supply and ground level is suppressed, in mixing high-speed circuit system, comprise noise source circuit and noise-sensitive circuit part, wherein said noise source circuit is by high-speed digital circuit, speed-sensitive switch power supply forms, described noise-sensitive circuit is comprised of radio circuit and analog circuit, and be distributed in zones of different, the described electromagnetic bandgap structure of design has covered the region at noise source circuit and noise-sensitive circuit place, be used for suppressing noise transmission each other.
2. the power distribution network of electromagnetic bandgap structure unit small-sized according to claim 1, it is characterized in that: described electromagnetic bandgap structure is a kind of artificial electromagnetic material, in certain frequency range, there is stopband characteristic, be used for the propagation of noise signal to suppress.
3. the power distribution network of electromagnetic bandgap structure unit small-sized according to claim 1 and 2, it is characterized in that: described electromagnetic bandgap structure has microwave opposite sex medium, when electric field axially incides resonator surface, can produce negative dielectric constant, form a precipitous transmission forbidden band, described complementary split-rings resonator size is less, reaches identical low-frequency cut-off frequency and noise suppression feature, thereby reduces the successional impact in return current path on holding wire.
4. the power distribution network of electromagnetic bandgap structure unit small-sized according to claim 1, it is characterized in that: the power plane of described power distribution network is formed by plane electromagnetic bandgap structure etching, guaranteed that signal integrity is unaffected, it is complete that ground level keeps.
5. the power distribution network of electromagnetic bandgap structure unit small-sized according to claim 1, it is characterized in that: what described power distribution network was used is FR-4 medium substrate, for lossy dielectric material, relative dielectric constant=4.4, dielectric thickness=0.2mm, metal thickness=the 35um of dielectric surface, loss angle tangent=0.02.
6. the power distribution network of electromagnetic bandgap structure unit small-sized according to claim 1, is characterized in that: described electromagnetic bandgap structure is local to be connected with SMA coaxial fitting, by vector network analyzer, measures noise coupling transmission coefficient.
7. the power distribution network of electromagnetic bandgap structure unit small-sized according to claim 1, it is characterized in that: described power distribution network, when take-40dB is when noise coupling suppresses standard, in 0.56GHz-5.88GHz frequency range, simultaneous switching noise is suppressed.
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Cited By (7)
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| CN103997201A (en) * | 2014-05-20 | 2014-08-20 | 浙江工业大学 | Power distribution network based on plane hybrid-bridge electromagnetic band gap structure |
| CN105517318A (en) * | 2014-09-25 | 2016-04-20 | 常熟凯玺电子电气有限公司 | Power supply EBG structure based on open-loop resonator and X-shaped bridge |
| CN108828321A (en) * | 2018-05-04 | 2018-11-16 | 杭州电子科技大学 | A kind of difference microwave remote sensor for Measuring Dielectric Constant |
| CN108872710A (en) * | 2018-05-04 | 2018-11-23 | 杭州电子科技大学 | A kind of Miniature double-layered magnetic coupling microwave remote sensor for Measuring Dielectric Constant |
| CN108872266A (en) * | 2018-05-04 | 2018-11-23 | 杭州电子科技大学 | A kind of miniature three layers of magnetic coupling microwave remote sensor for Measuring Dielectric Constant |
| CN110225649A (en) * | 2019-05-17 | 2019-09-10 | 杭州电子科技大学 | It is a kind of for inhibiting the electromagnet bandgap structure of simultaneous switching noise |
| CN114235849A (en) * | 2021-12-22 | 2022-03-25 | 杭州电子科技大学 | High-sensitivity microwave micro-fluidic sensor based on improved defected ground structure |
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| CN102522962A (en) * | 2011-11-14 | 2012-06-27 | 上海交通大学 | Power distribution network in high-speed circuit system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103997201A (en) * | 2014-05-20 | 2014-08-20 | 浙江工业大学 | Power distribution network based on plane hybrid-bridge electromagnetic band gap structure |
| CN105517318A (en) * | 2014-09-25 | 2016-04-20 | 常熟凯玺电子电气有限公司 | Power supply EBG structure based on open-loop resonator and X-shaped bridge |
| CN108828321A (en) * | 2018-05-04 | 2018-11-16 | 杭州电子科技大学 | A kind of difference microwave remote sensor for Measuring Dielectric Constant |
| CN108872710A (en) * | 2018-05-04 | 2018-11-23 | 杭州电子科技大学 | A kind of Miniature double-layered magnetic coupling microwave remote sensor for Measuring Dielectric Constant |
| CN108872266A (en) * | 2018-05-04 | 2018-11-23 | 杭州电子科技大学 | A kind of miniature three layers of magnetic coupling microwave remote sensor for Measuring Dielectric Constant |
| CN108828321B (en) * | 2018-05-04 | 2021-04-20 | 杭州电子科技大学 | Differential microwave sensor for measuring dielectric constant |
| CN108872710B (en) * | 2018-05-04 | 2021-04-20 | 杭州电子科技大学 | Miniature double-layer magnetic coupling microwave sensor for measuring dielectric constant |
| CN108872266B (en) * | 2018-05-04 | 2021-04-20 | 杭州电子科技大学 | Miniature three-layer magnetic coupling microwave sensor for measuring dielectric constant |
| CN110225649A (en) * | 2019-05-17 | 2019-09-10 | 杭州电子科技大学 | It is a kind of for inhibiting the electromagnet bandgap structure of simultaneous switching noise |
| CN114235849A (en) * | 2021-12-22 | 2022-03-25 | 杭州电子科技大学 | High-sensitivity microwave micro-fluidic sensor based on improved defected ground structure |
| CN114235849B (en) * | 2021-12-22 | 2023-08-01 | 杭州电子科技大学 | High-sensitivity microwave microfluidic sensor based on improved defected ground structure |
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