CN109117530A - Calculation method, device, equipment and the storage medium of transmission line copper foil loss - Google Patents
Calculation method, device, equipment and the storage medium of transmission line copper foil loss Download PDFInfo
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- CN109117530A CN109117530A CN201810841001.7A CN201810841001A CN109117530A CN 109117530 A CN109117530 A CN 109117530A CN 201810841001 A CN201810841001 A CN 201810841001A CN 109117530 A CN109117530 A CN 109117530A
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Abstract
The embodiment of the invention discloses calculation method, device, equipment and the storage mediums of a kind of loss of transmission line copper foil.Wherein, method includes: to obtain the impedance of transmission line；Using the impedance of the transmission line as the series resistance of the transmission line, calculates smooth non-frequency and become the loss that transmission line generates；The smooth non-frequency is become and is lost caused by rough surface of the loss of transmission line generation multiplied by the transmission line, the transmission line copper foil loss is obtained.Method provided in this embodiment can accurately calculate copper foil loss in advance, to reduce production cost and product design risk, shorten the design cycle.
Description
Technical field
A kind of be lost the present embodiments relate to semiconductor technology more particularly to transmission line copper foil calculation method, device,
Equipment and storage medium.
Background technique
Copper foil is the carrier in signal transduction channel in printed circuit board (Printed Circuit Board, PCB), is PCB
In most important component part.
Copper foil will lead to certain loss of signal when transmitting signal, for example, copper foil surface is thick when transmitting high-frequency signal
Rugosity is larger to the attenuation of signal.Surface roughness is bigger, bigger to the attenuation of signal；Correspondingly, rough surface
It is bigger to spend bring loss.Currently, carrying out actual test generally after pcb board molding to transmission line and obtaining loss of signal.
The defect of this method is: if loss of signal is unsatisfactory for requiring, it is also necessary to it redesigns pcb board and forms,
It improves production cost and design cycle, product design risk is higher.
Summary of the invention
The embodiment of the present invention provides calculation method, device, equipment and the storage medium of a kind of transmission line copper foil loss, with pre-
First calculate copper foil loss.
In a first aspect, the embodiment of the invention provides a kind of calculation methods of transmission line copper foil loss, comprising:
Obtain the impedance of transmission line；
Using the impedance of the transmission line as the series resistance of the transmission line, calculates smooth non-frequency and become transmission line generation
Loss；
The smooth non-frequency is become and is lost caused by rough surface of the loss of transmission line generation multiplied by the transmission line,
Obtain the transmission line copper foil loss.
Second aspect, the embodiment of the invention also provides a kind of computing device of transmission line copper foil loss, which includes:
Impedance obtains module, for obtaining the impedance of transmission line；
Loss calculation module, for calculating smooth using the impedance of the transmission line as the series resistance of the transmission line
Non- frequency become transmission line generate loss；
Loss obtains module, for the smooth non-frequency to be become to the loss of transmission line generation multiplied by the thick of the transmission line
Loss caused by rough surface obtains the transmission line copper foil loss.
The third aspect, the embodiment of the invention also provides a kind of electronic equipment, the electronic equipment includes:
One or more processors；
Memory, for storing one or more programs,
When one or more of programs are executed by one or more of processors, so that one or more of processing
Device realizes the calculation method of the loss of transmission line copper foil described in any embodiment.
Fourth aspect, the embodiment of the invention also provides a kind of computer readable storage mediums, are stored thereon with computer
Program realizes the calculation method of the loss of transmission line copper foil described in any embodiment when the program is executed by processor.
The technical solution of the present embodiment, by the impedance for obtaining transmission line；Using the impedance of the transmission line as the biography
The series resistance of defeated line calculates smooth non-frequency and becomes the loss that transmission line generates, to be obtained according to the impedance of transmission line smooth
Non- frequency become transmission line generate loss；By the way that the smooth non-frequency to be become to the loss of transmission line generation multiplied by the transmission line
Rough surface caused by loss, transmission line copper foil loss is obtained, so that passing through the above-mentioned of transmission line in PCB design phase
Parameter is previously obtained the loss of transmission line copper foil, without carrying out actual measurement after pcb board forms.
Further, due to the technical solution of the present embodiment can it is accurate, be previously obtained the loss of transmission line copper foil so that setting
Meter personnel can evaluate transmission line designed by it, whether used copper foil type meets wanting for product specific signal frequency
It asks, can voluntarily carry out corresponding optimization processing early period in design, reach the target of optimization link performance, be produced into reduce
Originally with product design risk, shorten the design cycle.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the calculation method for transmission line copper foil loss that the embodiment of the present invention one provides；
Fig. 2 a is a kind of flow chart of the calculation method of transmission line copper foil loss provided by Embodiment 2 of the present invention；
Fig. 2 b is the schematic cross-section of transmission line provided by Embodiment 2 of the present invention；
Fig. 3 is the schematic diagram for the human-computer interaction interface that the embodiment of the present invention three provides；
Fig. 4 is a kind of structural schematic diagram of the computing device for transmission line copper foil loss that the embodiment of the present invention four provides；
Fig. 5 is the structural schematic diagram for a kind of electronic equipment that the embodiment of the present invention five provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of flow chart of the calculation method for transmission line copper foil loss that the embodiment of the present invention one provides, this implementation
Example is applicable to before pcb board forms, and according to each parameter of transmission line, calculates the case where transmission line copper foil is lost, this method
It can be executed by computing device that transmission line copper foil is lost, which can be by hardware and/or software sharing, and can be integrated in
In electronic equipment.As shown in Figure 1, specifically comprising the following steps:
S110, the impedance for obtaining transmission line.
In the present embodiment, the impedance of transmission line includes DC impedance and/or frequency-dependent impedance.Due to what is transmitted on the transmission line
Signal frequency difference will lead to frequency-dependent impedance difference, if signal frequency is lower than preset threshold, frequency-dependent impedance is close to 0, then
The impedance of transmission line may include DC impedance, to reduce calculation amount.If signal frequency is higher than preset threshold, frequency variable resistance
Resist larger, DC impedance is relatively small, then the impedance of transmission line may include frequency-dependent impedance, to reduce calculation amount.
It is worth noting that can relatively accurately calculate biography when the impedance of transmission line includes DC impedance and frequency-dependent impedance
The impedance of defeated line, and then accurately calculate the loss of transmission line copper foil.
Optionally, the impedance of transmission line can be directly acquired, transmission line can also be calculated according to DC impedance and frequency-dependent impedance
Impedance then calculate the impedance of transmission line after can also calculating DC impedance and frequency-dependent impedance according to the parameter of transmission line.
S120, using the impedance of transmission line as the series resistance of transmission line, calculate smooth non-frequency and become what transmission line generated
Loss.
Smooth non-frequency becomes the loss that transmission line generates and refers to that copper foil roughness is 0, and transmission line when transmission non-frequency-dependent signal
Copper foil loss.At this point, the loss of transmission line copper foil includes loss caused by the series resistance of transmission line.
The formula that smooth non-frequency becomes the loss that transmission line generates is as follows:
Wherein, α is the loss that smooth non-frequency becomes that transmission line generates, RtotalIt is the series resistance of transmission line.
The impedance of transmission line is replaced series resistance by the present embodiment, is become with the smooth non-frequency of the impedance computation according to transmission line
The loss that transmission line generates.Based on this, in above-mentioned formula, RtotalIt is the impedance of transmission line.
S130, it smooth non-frequency is become is lost caused by the rough surface of loss that transmission line generates multiplied by transmission line, obtained
It is lost to transmission line copper foil.
Loss caused by the rough surface of transmission line can be directly acquired or be calculated.For example, transmission line is thick
Loss caused by rough surface can be obtained by Hammerstad equation and/or Huray model.Based on this, transmission line it is coarse
Loss caused by surface can be obtained by following any embodiment:
The first embodiment: Hammerstad equation is that the surface of copper foil is carried out triangular teeth, is assumed simultaneously
The rough surface particle of copper foil in uniform wave be distributed, therefore, Hammerstad equation using roughness root mean square tooth height come
The surface roughness of copper foil is described.
Specifically, roughness rms C is obtained；Rough surface using Hammerstad equation calculation transmission line causes
Loss KH。
Wherein shown in Hammerstad equation such as formula (2).
Wherein, δ is skin depth, and formula isσ is the conductivity of copper, and μ is space permeability,
Fre is the frequency of signal to be transmitted.
Second of embodiment: Huray model models copper foil surface roughness using " snowball ", and copper foil
Surface description is that flakes spheric granules is combined together in netted, to form rough surface.Based on Huray " snowball " model
Surface caused by be lost KHuraySee below formula:
K is lostHurayCalculating process belong to the prior art, details are not described herein again.
The third embodiment: cause in conjunction with the rough surface of Huray model and Hammerstad equation calculation transmission line
Loss.For example, seeking KHurayAnd KHAverage value, be lost caused by the rough surface as transmission line.Below with transmission line
Rough surface caused by loss be KHFor illustrate transmission line copper foil loss calculation method.
According to formula Insertionlosscop=α * KH, calculate transmission line copper foil and Insertionloss be lostcop.Due to
The length of transmission line, Insertionloss are not consideredcopIt can be described as the transmission line copper foil loss of unit length.Optionally, it transmits
Length and transmission line the copper foil loss of line are once linear relationships, are based on this, obtain the length L of transmission line；According to formula
Insertionlosscop_L=L* α * KH, the transmission line copper foil loss Insertion loss of computational length Lcop_L。
Table 1 shows the transmission line copper of transmission line copper foil loss and actual measurement that 5 groups of embodiment of the present invention are calculated
Foil loss, from table 1 it follows that the transmission line of transmission line copper foil loss and actual measurement that the embodiment of the present invention is calculated
Copper foil loss is identical, and further demonstrates that method precision provided in an embodiment of the present invention is higher.
Table 1
The technical solution of the present embodiment, by obtaining the impedance of transmission line, using the impedance of transmission line as the string of transmission line
Join resistance, calculates smooth non-frequency and become the loss that transmission line generates, become to obtain smooth non-frequency according to the impedance of transmission line
The loss that transmission line generates；By smooth non-frequency being become caused by rough surface of the loss of transmission line generation multiplied by transmission line
Loss obtains the loss of transmission line copper foil, so that being previously obtained transmission line copper by the above-mentioned parameter of transmission line in PCB design phase
Foil loss, without carrying out actual measurement after pcb board forms.
Further, due to the technical solution of the present embodiment can it is accurate, be previously obtained the loss of transmission line copper foil so that setting
Meter personnel can evaluate transmission line designed by it, whether used copper foil type meets wanting for product specific signal frequency
It asks, can voluntarily carry out corresponding optimization processing early period in design, reach the target of optimization link performance, be produced into reduce
Originally with product design risk, shorten the design cycle.
Embodiment two
The present embodiment advanced optimizes above-described embodiment, the acquisition process of the specific impedance for limiting transmission line.Figure
2a is a kind of flow chart of the calculation method of transmission line copper foil loss provided by Embodiment 2 of the present invention, specifically includes following step
It is rapid:
S210, the frequency-dependent impedance R for obtaining transmission lineAC_total。
Fig. 2 b is the schematic cross-section of transmission line provided by Embodiment 2 of the present invention.As shown in Figure 2 b, PCB is processed so that passing
Defeated line not instead of rectangle is etched into trapezoidal, distance H of the transmission line away from upper reference planes1, transmission line is away from lower reference planes
Distance H2, the lower line width W of transmission line1, the upper line width W of transmission line2, the height or copper thickness T of transmission line.
Since transmission line must be flowed back using the plane of reference, so transmission line itself and corresponding reference planes can be common
Signal is caused to be lost.The distance of transmission line to the plane of reference determines the size of the current density distribution of signal, Jin Erying
Loss of the reference planes to signal is rung.When actual product is routed, the crosstalk between signal and returned signal is transmitted in order to prevent
Greatly, it is desirable that the distance of both threads accomplishes >=5H (5 times of transmission line to reference planes distance, i.e. 5*H1Or 5*H2), then being directed to
When actual product line spacing is 5H, nearly 90% current density of the upper surface of transmission line concentrates on ± 5*H1In range, i.e. model
Enclosing size is 10*H1；Nearly 90% current density of the lower surface of transmission line concentrates on ± 5*H2In range, i.e., range size is
10*H2。
Assuming that calculating the frequency-dependent impedance for calculating reference planes based on upper and lower reference planes when product line spacing is 5H.Specifically
Ground obtains H1、H2With the frequency fre of signal to be transmitted；According to formulaWith reference to flat in calculating
The frequency-dependent impedance R in faceAC1_plane；According to formulaCalculate the frequency-dependent impedance of lower reference planes
RAC2_plane。
Wherein, σ is the conductivity of copper, and δ is skin depth, and formula isμ is space permeability.
Skin depth is brought into the frequency-dependent impedance formula of reference planes, it is availableThe frequency-dependent impedance of reference planes is one
A and H1、H2Function related with fre.
It is worth noting that when product line spacing is P H, P≥5.Correspondingly, the frequency-dependent impedance of transmission line may also change accordingly, no longer superfluous herein
It states.
Then, the frequency-dependent impedance of transmission line upper and lower surfaces is calculated.Specifically, W is obtained1And W2, according to formulaCalculate the frequency-dependent impedance R of transmission line upper surfaceAC1_trace；According to formulaCalculate the frequency-dependent impedance R of transmission line lower surfaceAC2_trace。
When signal transmits on the transmission line, frequency-dependent impedance R aboveAC1Frequency-dependent impedance and upper reference planes for upper surface
The sum of frequency-dependent impedance, i.e.,Following frequency-dependent impedance RAC2For the frequency of lower surface
The sum of the frequency-dependent impedance of impedance and lower reference planes, i.e.,
The frequency-dependent impedance of transmission line is the frequency-dependent impedance parallel connection of top and bottom as a result, i.e. RAC_total=RAC1//RAC2, that is,
According to formulaCalculate the frequency-dependent impedance of transmission line
RAC_total。
S220, the DC impedance R for obtaining transmission lineDC。
The lower line width W of DC impedance and transmission line1, upper line width W2, the conductivityσ of copper thickness T and copper is related.
Specifically, the lower line width W of transmission line is obtained1, the upper line width W of transmission line2With copper thickness T；According to formulaCalculate the DC impedance R of transmission lineDC。
S230, according to formulaCalculate the impedance R of transmission linetotal。
S240, using the impedance of transmission line as the series resistance of transmission line, calculate smooth non-frequency and become what transmission line generated
Loss.
S250, it smooth non-frequency is become is lost caused by the rough surface of loss that transmission line generates multiplied by transmission line, obtained
It is lost to transmission line copper foil.
In the present embodiment, by under distance of the transmission line away from upper reference planes, the distance away from lower reference planes, transmission line
Line width, the upper line width of transmission line, the frequency of signal to be transmitted and copper thickness calculate frequency-dependent impedance and the direct current resistance of transmission line
Resist, and then the impedance of transmission line is calculated according to frequency-dependent impedance and DC impedance, so as to according to each parameter of transmission line
The impedance for accurately calculating transmission line further increases the accuracy of transmission line copper foil loss；Moreover, without being formed in pcb board
After carry out actual measurement, reduce production cost and product design risk, shorten the design cycle.
Embodiment three
The calculating process of copper foil loss is described in detail by a specific application scenarios in the present embodiment.
Human-computer interaction interface is shown on an electronic device, as shown in figure 3, the parameter of input includes that transmission line is flat away from upper reference
The distance H in face1The distance H of (or upper dielectric thickness), transmission line away from lower reference planes2(or lower dielectric thickness), copper thickness
T, the lower line width W of transmission line1, transmission line upper line width W2, roughness rms C, the frequency fre of signal to be transmitted and transmission
The length L of line.The parameter of output is copper foil loss.
Designer inputs the parameter of above-mentioned needs input on human-computer interaction interface, and the parameter of input is as shown in Figure 3.Root
According to method provided in an embodiment of the present invention, the parameter of designer's input is extracted from human-computer interaction interface, and to the ginseng of extraction
Number carries out operation and obtains the loss of transmission line copper foil, will be in the loss output to human-computer interaction interface of transmission line copper foil.
It is described below in detail and the process of transmission line copper foil loss is obtained to the parameter progress operation shown in Fig. 3.
Step 1: calculating frequency-dependent impedance.According to formulaReference planes in calculating
Frequency-dependent impedance RAC1_plane；According to formulaCalculate the frequency-dependent impedance of lower reference planes
RAC2_plane.According toCalculate skin depth.Due to frequency in the formula of skin depth above
Unit is Hz, needs to convert into GHz, then by fre in skin depth multiplied by 109。
After the unit Hz of frequency is converted into GHz, it is also necessary to by H1、H2、W1And W2Unit inch be scaled mil, in
It is by H1、H2、W1And W2Multiplied by 10-3.Therefore, frequency-dependent impedance above isFollowing frequency-dependent impedance isThe frequency-dependent impedance of transmission line is
Wherein, μ=4* π * 10-7, σ=5.8*107。
Step 2: calculating DC impedance.By W1、W2It is scaled mil with the unit inch of T, then by W1、W2With T multiplied by
10-3, obtain DC impedance
Step 3: according to formula Insertion losscop_L=L* α * KH, calculate transmission line copper foil and 3.769dB be lost.
Example IV
Fig. 4 is a kind of structural schematic diagram of the computing device for transmission line copper foil loss that the embodiment of the present invention four provides, should
Device includes: that impedance obtains module 41, loss calculation module 42 and loss acquisition module 43.
Impedance obtains module 41, for obtaining the impedance of transmission line；
Loss calculation module 42, for calculating smooth non-frequency using the impedance of transmission line as the series resistance of transmission line
Become the loss that transmission line generates；
Loss obtains module 43, for smooth non-frequency to be become to the loss of transmission line generation multiplied by the rough surface of transmission line
Caused loss obtains the loss of transmission line copper foil.
The technical solution of the present embodiment, by the impedance for obtaining transmission line；Using the impedance of transmission line as the string of transmission line
Join resistance, calculates smooth non-frequency and become the loss that transmission line generates, become to obtain smooth non-frequency according to the impedance of transmission line
The loss that transmission line generates；By smooth non-frequency being become caused by rough surface of the loss of transmission line generation multiplied by transmission line
Loss obtains the loss of transmission line copper foil, so that being previously obtained transmission line copper by the above-mentioned parameter of transmission line in PCB design phase
Foil loss, without carrying out actual measurement after pcb board forms.
Further, due to the technical solution of the present embodiment can it is accurate, be previously obtained the loss of transmission line copper foil so that setting
Meter personnel can evaluate transmission line designed by it, whether used copper foil type meets wanting for product specific signal frequency
It asks, can voluntarily carry out corresponding optimization processing early period in design, reach the target of optimization link performance, be produced into reduce
Originally with product design risk, shorten the design cycle.
Optionally, impedance obtains module 41 when obtaining the impedance of transmission line, is specifically used for: obtaining the frequency variable resistance of transmission line
Anti- RAC_total；Obtain the DC impedance R of transmission lineDC；According to formulaCalculate the impedance of transmission line
Rtotal。
Optionally, impedance obtains module 41 in the frequency-dependent impedance R for obtaining transmission lineAC_totalWhen, it is specifically used for: obtains transmission
The distance H of reference planes on line-spacing1, distance H of the transmission line away from lower reference planes2, the lower line width W of transmission line1, transmission line it is upper
Line width W2, the frequency fre of signal to be transmitted；According to formulaThe frequency of reference planes in calculating
Impedance RAC1_plane；According to formulaCalculate the frequency-dependent impedance of lower reference planes
RAC2_plane；According to formulaCalculate the frequency-dependent impedance R of transmission line upper surfaceAC1_trace；According to formulaCalculate the frequency-dependent impedance R of transmission line lower surfaceAC2_trace；According to formulaCalculate the frequency-dependent impedance R of transmission lineAC_total；Its
In, σ is the conductivity of copper, and μ is space permeability, and δ is skin depth, and formula is
Optionally, impedance obtains module 41 in the DC impedance R for obtaining transmission lineDCWhen, it is specifically used for: obtains transmission line
Lower line width W1, the upper line width W of transmission line2With copper thickness T；According to formulaCalculate transmission line
DC impedance RDC。
Optionally, loss calculation module 42 calculates smooth using the impedance of transmission line as the series resistance of transmission line
When non-frequency becomes the loss that transmission line generates, it is specifically used for: according to formulaIt calculates smooth non-frequency and becomes transmission line
The loss α of generation；Wherein, RtotalIt is the impedance of transmission line.
Optionally, loss obtains module 43 in the loss for generating smooth non-frequency change transmission line multiplied by the coarse of transmission line
Loss caused by surface is specifically used for when obtaining the loss of transmission line copper foil: obtaining roughness rms C；Using
Hammerstad equationIt calculates and K is lost caused by the rough surface of transmission lineH；Root
According to formula Insertion losscop=α * KH, the transmission line copper foil loss Insertion loss of unit of account lengthcop；Its
In, α is the loss that smooth non-frequency becomes that transmission line generates, and δ is skin depth, and formula isσ is copper
Conductivity, μ is space permeability, and fre is the frequency of signal to be transmitted.
Optionally, loss obtains module 43 in the loss for generating smooth non-frequency change transmission line multiplied by the coarse of transmission line
Loss caused by surface is specifically used for when obtaining the loss of transmission line copper foil: obtaining the length L of transmission line；According to formula
Insertion losscop_L=L* α * KH, the transmission line copper foil loss Insertion loss of computational length Lcop_L；Wherein, α is
Smooth non-frequency becomes the loss that transmission line generates, KHIt is Hammerstad equation.
Any embodiment of that present invention institute can be performed in the computing device of the loss of transmission line copper foil provided by the embodiment of the present invention
The calculation method of the transmission line copper foil loss of offer, has the corresponding functional module of execution method and beneficial effect.
Embodiment five
Fig. 5 is the structural schematic diagram for a kind of electronic equipment that the embodiment of the present invention five provides, as shown in figure 5, the electronics is set
Standby includes processor 50, memory 51, input unit 52 and output device 53；The quantity of processor 50 can be in electronic equipment
One or more, in Fig. 5 by taking a processor 50 as an example；Processor 50, memory 51,52 and of input unit in electronic equipment
Output device 53 can be connected by bus or other modes, in Fig. 5 for being connected by bus.
Memory 51 is used as a kind of computer readable storage medium, can be used for storing software program, journey can be performed in computer
Sequence and module, the corresponding program instruction of the calculation method/module (example being lost such as the transmission line copper foil in the embodiment of the present invention
Such as, the impedance in the computing device of transmission line copper foil loss obtains module 41, loss calculation module 42 and loss and obtains module
43).Software program, instruction and the module that processor 50 is stored in memory 51 by operation, thereby executing electronic equipment
Various function application and data processing, that is, realize the calculation method of above-mentioned transmission line copper foil loss.
Memory 51 can mainly include storing program area and storage data area, wherein storing program area can store operation system
Application program needed for system, at least one function；Storage data area, which can be stored, uses created data etc. according to terminal.This
Outside, memory 51 may include high-speed random access memory, can also include nonvolatile memory, for example, at least a magnetic
Disk storage device, flush memory device or other non-volatile solid state memory parts.In some instances, memory 51 can be further
Including the memory remotely located relative to processor 50, these remote memories can pass through network connection to electronic equipment.
The example of above-mentioned network includes but is not limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
Input unit 52 can be used for receiving the parameter of the transmission line of input, and generate with the user setting of electronic equipment with
And the related key signals input of function control.Output device 53 may include that display screen etc. shows equipment, for showing human-computer interaction
Interface.
Embodiment six
The embodiment of the present invention six also provides a kind of computer readable storage medium for being stored thereon with computer program, calculates
Machine program when being executed by computer processor for executing a kind of calculation method of transmission line copper foil loss, this method comprises:
Obtain the impedance of transmission line；
Using the impedance of transmission line as the series resistance of transmission line, calculates smooth non-frequency and become the loss that transmission line generates；
Smooth non-frequency is become and is lost caused by rough surface of the loss of transmission line generation multiplied by transmission line, is transmitted
The loss of line copper foil.
Certainly, a kind of computer-readable storage medium being stored thereon with computer program provided by the embodiment of the present invention
Matter, computer executable instructions are not limited to method operation as above, can also be performed provided by any embodiment of the invention
Relevant operation in the calculation method of transmission line copper foil loss.
By the description above with respect to embodiment, it is apparent to those skilled in the art that, the present invention
It can be realized by software and required common hardware, naturally it is also possible to which by hardware realization, but in many cases, the former is more
Good embodiment.Based on this understanding, technical solution of the present invention substantially in other words contributes to the prior art
Part can be embodied in the form of software products, which can store in computer readable storage medium
In, floppy disk, read-only memory (Read-Only Memory, ROM), random access memory (Random such as computer
Access Memory, RAM), flash memory (FLASH), hard disk or CD etc., including some instructions are with so that a computer is set
The method that standby (can be personal computer, server or the network equipment etc.) executes each embodiment of the present invention.
It is worth noting that, in the embodiment of the computing device of above-mentioned transmission line copper foil loss, included each unit
It is only divided according to the functional logic, but is not limited to the above division with module, as long as can be realized corresponding function
Energy；In addition, the specific name of each functional unit is also only for convenience of distinguishing each other, the guarantor being not intended to restrict the invention
Protect range.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of calculation method of transmission line copper foil loss characterized by comprising
Obtain the impedance of transmission line；
Using the impedance of the transmission line as the series resistance of the transmission line, calculates smooth non-frequency and become the damage that transmission line generates
Consumption；
The smooth non-frequency is become and is lost caused by rough surface of the loss of transmission line generation multiplied by the transmission line, is obtained
The transmission line copper foil loss.
2. the method according to claim 1, wherein the impedance for obtaining transmission line includes:
Obtain the frequency-dependent impedance R of the transmission lineAC_total；
Obtain the DC impedance R of the transmission lineDC；
According to formulaCalculate the impedance R of the transmission linetotal。
3. according to the method described in claim 2, it is characterized in that, the frequency-dependent impedance R for obtaining the transmission lineAC_total,
Include:
Obtain distance H of the transmission line away from upper reference planes1, the distance H of the transmission line away from lower reference planes2, the transmission
The lower line width W of line1, the upper line width W of the transmission line2, the frequency fre of signal to be transmitted；
According to formulaCalculate the frequency-dependent impedance R of the upper reference planesAC1_plane；
According to formulaCalculate the frequency-dependent impedance R of the lower reference planesAC2_plane；
According to formulaCalculate the frequency-dependent impedance R of transmission line upper surfaceAC1_trace；
According to formulaCalculate the frequency-dependent impedance R of transmission line lower surfaceAC2_trace；
According to formulaCalculate the frequency of the transmission line
Impedance RAC_total；
Wherein, σ is the conductivity of copper, and μ is space permeability, and δ is skin depth, and formula is
4. according to the method described in claim 2, it is characterized in that, the DC impedance R for obtaining the transmission lineDC, comprising:
Obtain the lower line width W of the transmission line1, the upper line width W of the transmission line2With copper thickness T；
According to formulaCalculate the DC impedance R of the transmission lineDC；
Wherein, σ is the conductivity of copper.
5. the method according to claim 1, wherein described using the impedance of the transmission line as the transmission line
Series resistance, calculate smooth non-frequency and become the loss that transmission line generates, comprising:
According to formulaIt calculates smooth non-frequency and becomes the loss α that transmission line generates；
Wherein, RtotalIt is the impedance of the transmission line.
6. the method according to claim 1, wherein described become the smooth non-frequency damage that transmission line generates
It consumes and is lost caused by the rough surface multiplied by the transmission line, obtain the transmission line copper foil loss, comprising:
Obtain roughness rms C；
Using Hammerstad equationThe rough surface for calculating the transmission line causes
Loss KH；
According to formula Insertion losscop=α * KH, calculate the transmission line copper foil loss Insertion of the unit length
losscop；
Wherein, α is the loss that smooth non-frequency becomes that transmission line generates, and δ is skin depth, and formula isσ
It is the conductivity of copper, μ is space permeability, and fre is the frequency of signal to be transmitted.
7. method according to claim 1-6, which is characterized in that described that the smooth non-frequency is become transmission line
It is lost caused by rough surface of the loss of generation multiplied by the transmission line, obtains the transmission line copper foil loss, comprising:
Obtain the length L of the transmission line；
According to formula Insertion losscop_L=L* α * KH, the transmission line copper foil loss Insertion of computational length L
losscop_L；
Wherein, α is the loss that smooth non-frequency becomes that transmission line generates, KHIt is Hammerstad equation.
8. a kind of computing device of transmission line copper foil loss characterized by comprising
Impedance obtains module, for obtaining the impedance of transmission line；
Loss calculation module, it is smooth non-for calculating using the impedance of the transmission line as the series resistance of the transmission line
Frequency becomes the loss that transmission line generates；
Loss obtains module, for the smooth non-frequency to be become to the loss of transmission line generation multiplied by the coarse table of the transmission line
Loss caused by face obtains the transmission line copper foil loss.
9. a kind of electronic equipment, which is characterized in that the electronic equipment includes:
One or more processors；
Memory, for storing one or more programs,
When one or more of programs are executed by one or more of processors, so that one or more of processors are real
The now calculation method of the transmission line copper foil loss as described in any in claim 1-7.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
The calculation method of the transmission line copper foil loss as described in any in claim 1-7 is realized when execution.
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