Using Circuit Simulators >Chapter 4: Working with Data Files
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Touchstone SnP Format

These files contain small-signal G-, H-, S-, Y-, or Z-network parameters described by frequency-dependent linear network parameters for 1- to 10-port components. The 2-port component files can also contain frequency-dependent noise parameters. This data file format is also known as Touchstone format.

An .snp file can be used with an SnP component to model the behavior of a linear model using S-parameters. The file contains the S-parameters, the component is placed within the schematic.

This section describes:

  • Choosing an .snp file for use with an SnP component

  • An overview of the SnP file

  • The basic SnP format

  • Adding noise to a 2-port Snp file

  • The basic SnP format applied to G-, H-, S-, Y-, and Z-parameters, plus examples of each

Linking an .snp File to an SnP Component

To link a file to the component:

  1. Add an SnP component to your schematic. It can be found in the Data Items library.

  2. Select the File parameter. Ensure that the Parameter Entry Mode is set to Network Parameter File Name.

  3. In the File Name field, enter the name of the file you want to use:

      • You can type the name directly in the field.

      • Click Data files list to locate a file in the current project (or any files located based on the setting of the DATAFILES variable in de_sim.cfg).

      • Click Browse to locate a file outside the current project.

      • Click Copy template to select an example file that you can customize.

  4. After you select a file, click Edit if you want to view the file or change its contents.

For instructions on how to set the remaining parameters, click Help in the open component dialog box.

Overview

SnP data files are ASCII text files in which data appears line by line, one line per data point, in increasing order of frequency. Each line of data consists of a frequency value and one or more pairs of values for the magnitude and phase of each S-parameter at that frequency. Values are separated by one or more spaces, tabs or commands. Comments are preceded by an exclamation mark (!). Comments can appear on separate lines, or after the data on any line or lines. Extra spaces are ignored. Recommendations for filenames are:

1-port: filename.s1p

2-port: filename.s2p

Up to 10 ports can be defined.

You can specify the following parameters in an .snp file:

S

=

Scattering parameters

Y

=

Admittance parameters

Z

=

Impedance parameters

H

=

Hybrid-h parameters

G

=

Hybrid-g parameters


Note    The mismatched port impedance is not supported by the ADS simulator. If a Touchstone file has the input/output mismatch information in the header, it is ignored by the DAC and the SnP components, and a default matching 50 ohm port impedance is used.

The following sections discuss the content and format of network parameter files as input for circuit analysis.

Basic SnP File Format

The following example shows the general format for component data files. It consists of:

  • An option line

  • Data lines

  • Comments

The Option Line

The option line, specifying the frequency units and the normalizing impedance, precedes the data lines.

# (freq_units  parameter  format  R n)

<data line>

...

<data line>

where:
#

=

The delimiter that tells the program you are specifying these parameters

freq_units

=

Sets the units. Options are GHz, MHz, KHz, or Hz.

parameter

=

Sets the desired parameter. Options are:
  S, Y or Z for S1P components
  S, Y, Z, G, or H for S2P components
  S for S3P or S4P components

format

=

The format desired. Options are:
  DB for dB-angle
  MA for magnitude angle
  RI for real-imaginary

This does not apply to noise parameters. (Refer to Adding Noise Parameters to an SnP File.)

R n

=

The reference resistance in ohms, where n is a positive number of ohms; which is the real impedance to which the parameters are normalized.

In summary, the option line should read:

For .s1p files:

#
[HZ/KHZ/MHZ/GHZ]
[S/Y/Z]
[MA/DB/RI]
[R n]

For .s2p files:

#
[HZ/KHZ/MHZ/GHZ]
[S/Y/Z/G/H]
[MA/DB/RI]
[R n]

For .s3p/.s4p files:

#
[HZ/KHZ/MHZ/GHZ]
[S]
[MA/DB/RI]
[R n]

where square brackets [...] indicate optional information; .../.../.../ indicates that you select one of the choices; and, n is replaced by a positive number.

Default Option Line

The default option line for component data files is:

# GHZ S MA R 50

Option Line Examples

Frequency in GHz, S-parameters in real-imaginary format, normalized 100 ohms:

# GHz S RI R 100

Frequency in KHz, Y-parameters in real-imaginary format, normalized 100 ohms:

# KHz Y RI R 100

Frequency in Hz, Z-parameters in magnitude-degree format, normalized to 1 ohm:

# Hz Z  MA R 1

Frequency in KHz, H-parameters in real-imaginary format normalized to 1 ohm:

# KHz H RI R 1

Frequency in Hz, G-parameters in magnitude-degree, format normalized to 1 ohm:

# Hz G MA R 1

Data Lines

Data lines contain the data of interest. A special format is used for 2-port data files where all of the network parameter data for a single frequency is listed on one line. The order of the network parameters is:

N11, N21, N12, N22

For 3-port or higher data files, the network parameters appear in the file in a matrix form, each row starting on a separate line. A maximum of four network parameters (with 2 real numbers for each) appear on any line. The remaining network parameters are continued on as many additional lines as are needed.

The following sections describe the data-line format for single and multi-port components.

Data-line Formats

When you type the data below the option line, the columns need not line up precisely like those shown. The syntax for entering data is as follows:

1-port Component

Magnitude-Angle format:
(Columns:

f
Mag
Ang)

f
|S11|
<S11

2-port Component

Magnitude-Angle format:
f

|S11| <S11 |S21| <S21 |S12| <S12 |S22| <S22

Real-Imaginary format:
f

Re{S11} Im{S11} Re{S21} Im{S21} Re{S12} Im{S12} Re{S22} Im{S22}

dB-Angle format:
f

20log10|x11| <x11 20log10|x21| <x21 20log10|x12| <x12 20log10|x22| <x22

where
x

=

S/Y/Z/H/G

f

=

Frequency


Note    For each s1p and s2p file format, the data must be on one line.

3-port Component

Magnitude-Angle format:
(Columns:

f
Mag
Ang
Mag
Ang
Mag
Ang)

f
|S11|
<S11
|S12|
<S12
|S13|
<S13



|S21|
<S21
|S22|
<S22
|S23|
<S23



|S31|
<S31
|S32|
<S32
|S33|
<S33

4-port Component

Magnitude-Angle format:
(Columns:

f
Mag
Ang
Mag
Ang
Mag
Ang
Mag
Ang)

f
|S11|
<S11
|S12|
<S12
|S13|
<S13
|S14|
<S14



|S21|
<S21
|S22|
<S22
|S23|
<S23
|S24|
<S24



|S31|
<S31
|S32|
<S32
|S33|
<S33
|S34|
<S34



|S41|
<S41
|S42|
<S42
|S43|
<S43
|S44|
<S44

where:
f

=

Frequency

Mag

=

Magnitude of S-parameter Sij

Ang

=

Angle of S-parameter Sij

Adding Comments to Data Files

You can document your data files by preceding a comment with the exclamation mark (!) on any line. A comment can be the only entry on a line or can follow the data on any line.

Adding Noise Parameters to an SnP File

Noise parameters can be included in SnP 2-port data files. Noise data can follow G-, H-, S-, Y-, or Z-parameters described for each frequency. The x values are data.

Each line of a noise parameter has the following five entries:

x1     x2      x3    x4    x5

where:
x1

=

Frequency in units. The first point of noise data must have a frequency less than the frequency of the last S-parameter frequency

x2

=

Minimum noise figure in dB

x3

=

Source reflection coefficient to realize minimum noise figure (MA)

x4

=

Phase in degrees of the reflection coefficient (MA)

x5

=

Normalized effective noise resistance. The system simulator requires this parameter to meet physical requirements. If the user-supplied x5 value is less than allowed for this requirement, then the system simulator will force this x5 value to the lowest physical limit.


Note    The frequencies for noise parameters and network parameters need not match. The only requirement is that the lowest noise-parameter frequency be less than or equal to the highest network-parameter frequency. This allows the file processor to determine where network parameters end and noise parameters begin.

The source reflection coefficient and effective noise resistance are normalized to the same resistance as specified for the network parameters.

Example File Containing Noise Data

This is an example of a data file with noise data:

    ! NEC710
    # GHZ S MA R 50
     2  .95   -26  3.57  157  .04  76  .66  -14
    22  .60  -144  1.30   40  .14  40  .56  -85
    ! NOISE PARAMETERS
     4  .7    .64   69  .38
    18   2.7  .46  -33  .40

Applying the SnP Format, and Examples

In this section are formatting references and examples for:

  • G-parameter files

  • H-parameter files

  • S-parameter files

  • Y- and Z-parameter files

Guidelines

  • The optimum source reflection coefficient and the normalized effective noise resistance are assumed to be with respect to the normalizing resistance value (appearing after the R keyword) on the header line.

  • The frequencies for noise parameters and G-, H-, S-, Y-, or Z-parameters (network parameters) do not have to match. The only requirement is that the lowest noise parameter frequency be less than or equal to the highest network parameter frequency. This allows the file processor to determine where G-, H-, S-, Y-, or Z-parameters end and noise parameters begin.

G-parameter Files

G-parameter files (Hybrid-g parameters) use MA or RI format. They are strictly 2-port files. G-parameter measurements are:

G11

input admittance (port 2 open)

G22

output impedance (port 1 shorted)

G21

forward voltage gain (port 2 open)

G12

reverse current gain (port 1 shorted)

G-parameter MA and RI File Formats
 #     frequency_unit     G     MA     R   impedance
 freq  magG11  angG11  magG21  angG21  magG12  angG12  magG22  angG22
 
 #     frequency_unit     G     RI     R   impedance
 freq  reG11  imG11  reG21  imG21  reG12  imG12  reG22  imG22
G-parameter File Example
 ! symbol freq-unit parameter-type data-format keyword impedance-ohms
 #   KHZ   G   MA   R   1
 ! freq  magG11  angG11  magG21  angG21  magG12  angG12  magG22  angG22
    2    .95     -26     3.57     157    .04     76      .66     -14
    3    .93     -40     3.53     147    .05     69      .65     -20
    4    .89     -52     3.23     136    .06     62      .63     -26

H-parameter Files

H-parameter files (Hybrid-h parameters) use MA or RI format. They are strictly 2-port files. H-parameter measurements are:

H11

input impedance (port 2 shorted)

H22

output admittance (port 1 open)

H21

forward current gain (port 2 shorted)

H12

reverse voltage gain (port 1 open)

H-parameter File Example
 ! symbol  freq-unit  parameter-type  data-format  keyword  impedance-ohms
 #   KHZ   H    MA   R   1
 !  freq  magH11  angH11  magH21  angH21  magH12  angH12  magH22  angH22
    2     .95     -26     3.57    157     .04     76      .66     -14
    3     .93     -40     3.53    147     .05     69      .65     -20
    4     .89     -52     3.23    136     .06     62      .63     -26

S-parameter Files

S-parameter files (scattering parameters) can have MA, RI, or DB format for files with 1 to 99 ports.

S-parameter 1-port MA, RI, and DB File Formats
 #   frequency_unit   S   MA   R   impedance
 freq   magS11   angS11
 
 #   frequency_unit   S   RI   R   impedance
 freq   reS11   imS11
 
 #   frequency_unit   S   DB   R   impedance
 freq  dbS11   angS11
S-parameter 2-port MA, RI, and DB File Formats
 #   frequency_unit   S   MA   R   impedance
 freq   magS11   angS11   magS21   angS21   magS12   angS12   magS22   angS22
 
 #   frequency_unit   S   RI   R   impedance
 freq   reS11   imS11   reS21   imS21   reS12   imS12   reS22   imS22 
 
 #   frequency_unit   S   DB   R   impedance
 freq   dbS11   angS11   dbS21   angS21   dbS12   angS12   dbS22   angS22
S-parameter 3-port MA, RI, and DB File Formats
 #   frequency_unit   S   MA   R   impedance
 freq   magS11   angS11   magS12   angS12   magS13   angS13 ! 1st row
        magS21   angS21   magS22   angS22   magS23   angS23 ! 2nd row
        magS31   angS31   magS32   angS32   magS33   angS33 ! 3rd row
 
 #   frequency_unit   S   RI   R   impedance
 freq   reS11   imS11   reS12   imS12   reS13   imS13 ! 1st row
        reS21   imS21   reS22   imS22   reS23   imS23 ! 2nd row
        reS31   imS31   reS32   imS32   reS33   imS33 ! 3rd row
 
 #   frequency_unit   S   DB   R   impedance
 freq   dbS11   angS11   dbS12   angS12   dbS13   angS13 ! 1st row
        dbS21   angS21   dbS22   angS22   dbS23   angS23 ! 2nd row
        dbS31   angS31   dbS32   angS32   dbS33   angS33 ! 3rd row
S-parameter 4-port MA, RI, and DB File Formats
 #   frequency_unit   S   MA   R   impedance
 ! 1st row
 freq  magS11  angS11  magS12  angS12  magS13  angS13  magS14  angS14 
     magS21  angS21  magS22  angS22  magS23  angS23  magS24  angS24 ! 2nd row
     magS31  angS31  magS32  angS32  magS33  angS33  magS34  angS34 ! 3rd row
     magS41  angS41  magS42  angS42  magS43  angS43  magS44  angS44 ! 4th row
 
 #   frequency_unit   S   RI   R   impedance
 freq  reS11  imS11  reS12  imS12  reS13  imS13  reS14  imS14 ! 1st row
       reS21  imS21  reS22  imS22  reS23  imS23  reS24  imS24 ! 2nd row
       reS31  imS31  reS32  imS32  reS33  imS33  reS34  imS34 ! 3rd row
       reS41  imS41  reS42  imS42  reS43  imS43  reS44  imS44 ! 4th row
 
 #   frequency_unit   S   DB   R   impedance
 freq  dbS11  angS11  dbS12  angS12  dbS13  angS13  dbS14  angS14 ! 1st row
       dbS21  angS21  dbS22  angS22  dbS23  angS23  dbS24  angS24 ! 2nd row
       dbS31  angS31  dbS32  angS32  dbS33  angS33  dbS34  angS34 ! 3rd row
       dbS41  angS41  dbS42  angS42  dbS43  angS43  dbS44  angS44 ! 4th row
S-parameter 1-port File Example
 ! symbol  freq-unit  parameter-type  data-format  keyword  impedance-ohms
 #   MHZ   S   MA   R   50
 ! freq    magS11  angS11    (commented header line)
   2.000  0.894  -12.136
   3.000  0.893  -18.179
   4.000  0.891  -24.193
S-parameter 5- to 99-port File Formats

These file formats appear in a matrix form similar to the 3- and 4-port files, except that only four S-parameters (with 2 real numbers for each) can appear on a given line. Therefore, the remaining S-parameters in that row of the S-matrix continue on the next line of the file.

Each row of the S-matrix must begin on a new line of the file. The first line of the first row of the S-matrix begins with the frequency value.

S-parameter 10-port File Example (at One Frequency)
 #   frequency_unit   S   MA   R   impedance
 freq magS11 angS11 magS12 angS12 magS13 angS13 magS14 angS14 ! 1st row
 magS15 angS15 magS16 angS16 magS17 angS17 magS18 angS18
 magS19 angS19 magS1,10 angS1,10
 
 magS21 angS21 magS22 angS22 magS23 angS23 magS24 angS24 ! 2nd row
 magS25 angS25 magS26 angS26 magS27 angS27 magS28 angS28
 magS29 angS29 magS2,10 angS2,10
 
 magS31 angS31 magS32 angS32 magS33 angS33 magS34 angS34 ! 3rd row
 magS35 angS35 magS36 angS36 magS37 angS37 magS38 angS38
 magS39 angS39 magS3,10 angS3,10
 
 magS41 angS41 magS42 angS42 magS43 angS43 magS44 angS44 ! 4th row
 magS45 angS45 magS46 angS46 magS47 angS47 magS48 angS48
 magS49 angS49 magS4,10 angS4,10
 
 magS51 angS51 magS52 angS52 magS53 angS53 magS54 angS54 ! 5th row
 magS55 angS55 magS56 angS56 magS57 angS57 magS58 angS58
 magS59 angS59 magS5,10 angS5,10
 
 magS61 angS61 magS62 angS62 magS63 angS63 magS64 angS64 ! 6th row
 magS65 angS65 magS66 angS66 magS67 angS67 magS68 angS68
 magS69 angS69 magS6,10 angS6,10
 
 magS71 angS71 magS72 angS72 magS73 angS73 magS74 angS74 ! 7th row
 magS75 angS75 magS76 angS76 magS77 angS77 magS78 angS78
 magS79 angS79 magS7,10 angS7,10
 
 magS81 angS81 magS82 angS82 magS83 angS83 magS84 angS84 ! 8th row
 magS85 angS85 magS86 angS86 magS87 angS87 magS88 angS88
 magS89 angS89 magS8,10 angS8,10
 
 magS91 angS91 magS92 angS92 magS93 angS93 magS94 angS94 ! 9th row
 magS95 angS95 magS96 angS96 magS97 angS97 magS98 angS98
 magS99 angS99 magS9,10 angS9,10
 !10th row
 magS10,1 angS10,1 magS10,2 angS10,2 magS10,3 angS10,3 magS10,4 angS10,4 
 magS10,5 angS10,5 magS10,6 angS10,6 magS10,7 angS10,7 magS10,8 angS10,8 
magS10,9 angS10,9 magS10,10 angS10,10
Linear 1-port (.s1p) File Example
 # GHZ   S   RI   R   50.0
     1.00000000    0.9488    -0.2017
     1.50000000    0.9077    -0.3125
     2.00000000    0.8539    -0.4165
     2.50000000    0.7884    -0.5120
     3.00000000    0.7124    -0.5978
     3.50000000    0.6321    -0.6546
     4.00000000    0.5479    -0.7013
     4.50000000    0.4701    -0.7380
     5.00000000    0.3904    -0.7663
     5.50000000    0.3302    -0.7778
     6.00000000    0.2702    -0.7848
     6.50000000    0.2041    -0.7890
     7.00000000    0.1389    -0.7878
     7.50000000    0.0894    -0.7849
     8.00000000    0.0408    -0.7789
     8.50000000    0.0134    -0.7649
     9.50000000    0.0654    -0.7471
     9.00000000    0.1094    -0.7319
     10.0000000    0.1518    -0.7140
Linear 2-port (.s2p) File Example
 # GHZ    S   RI   R   50.0
 1.0000  0.3926  -0.1211  -0.0003  -0.0021  -0.0003  -0.0021  0.3926  -0.1211
 2.0000  0.3517  -0.3054  -0.0096  -0.0298  -0.0096  -0.0298  0.3517  -0.3054
 10.000  0.3419   0.3336  -0.0134   0.0379  -0.0134   0.0379  0.3419   0.3336
 !Noise params
  1.0000  2.0000  -0.1211  -0.0003  .4
  2.0000  2.5000  -0.3054  -0.0096  .45
  3.0000  3.0000  -0.6916  -0.6933  .5
  4.0000  3.5000  -0.3756   0.4617  .55
  5.0000  4.0000   0.3880   0.6848  .6
  6.0000  4.5000   0.0343   0.0383  .65
  7.0000  5.0000   0.6916   0.6933  .7
  8.0000  5.5000   0.5659   0.1000  .75
  9.0000  6.0000   0.4145   0.0307  .8
 10.0000  6.5000   0.3336   0.0134  .85
Linear 3-port (.s3p) File Example
 #  GHZ  S  MA  R  50.0
 !  POWER DIVIDER, 3-PORT
 5.00000  0.24254  136.711   0.68599  -43.3139  0.68599  -43.3139
          0.68599  -43.3139  0.08081   66.1846  0.28009  -59.1165
          0.68599  -43.3139  0.28009  -59.1165  0.08081   66.1846
 6.00000  0.20347  127.652   0.69232  -52.3816  0.69232  -52.3816
          0.69232  -52.3816  0.05057   52.0604  0.22159  -65.1817
          0.69232  -52.3816  0.22159  -65.1817  0.05057   52.0604
 7.00000  0.15848  118.436   0.69817  -61.6117  0.69817  -61.6117
          0.69817  -61.6117  0.02804   38.6500  0.16581  -71.2358
          0.69817  -61.6117  0.16581  -71.2358  0.02804   38.6500
Linear 4-port (.s4p) File Example
 #  GHZ  S  MA  R  50
 5.00000 0.60262  161.240  0.40611 -42.2029 0.42918 -66.5876 0.53640 -79.3473
         0.40611  -42.2029 0.60262 161.240  0.53640 -79.3473 0.42918 -66.5876
         0.42918  -66.5876 0.53640 -79.3473 0.60262 161.240  0.40611 -42.2029
         0.53640  -79.3473 0.42918 -66.5876 0.40611 -42.2029 0.60262 161.240
 6.00000 0.57701  150.379  0.40942 -44.3428 0.41011 -81.2449 0.57554 -95.7731
         0.40942  -44.3428 0.57701 150.379  0.57554 -95.7731 0.41011 -81.2449
         0.41011  -81.2449 0.57554 -95.7731 0.57701 150.379  0.40942 -44.3428
         0.57554  -95.7731 0.41011 -81.2449 0.40942 -44.3428 0.57701 150.379
 7.00000 0.50641  136.693  0.45378 -46.4151 0.37845 -99.0918 0.62802 -114.196
         0.45378  -46.4151 0.50641 136.693  0.62802 -114.196 0.37845 -99.0918
         0.37845  -99.0918 0.62802 -114.196 0.50641 136.693  0.45378 -46.4151
         0.62802 -114.196  0.37845 -99.0918 0.45378 -46.4151 0.50641 136.693

Y- and Z-parameter Files

Immittance parameters are specified in MA or RI format, where the # line has Y for admittance and Z for impedance. Both are normalized to the reference resistance.

Y- (Z-) Parameter 1-port MA and RI File Formats

    #   frequency_unit   Y   MA   R   impedance
    freq  magY11  angY11
 
    #   frequency_unit   Y   RI   R   impedance
    freq  reY11  imY11

Y- (Z-) Parameter 2-port MA and RI File Formats

    #   frequency_unit   Y   MA   R   impedance
    freq  magY11  angY11  magY21  angY21  magY12  angY12  magY22  angY22

    #   frequency_unit   Y   RI   R   impedance
    freq  reY11  imY11  reY21  imY21  reY12  imY12  reY22  imY22 

Y- (Z-) Parameter 3-port MA and RI File Formats

 freq  magY11  angY11  magY12  angY12  magY13  angY13 ! 1st row
       magY21  angY21  magY22  angY22  magY23  angY23 ! 2nd row
       magY31  angY31  magY32  angY32  magY33  angY33 ! 3rd row

 #  frequency_unit  Y  RI  R  impedance
 freq  reY11  imY11  reY12  imY12  reY13  imY13 ! 1st row
       reY21  imY21  reY22  imY22  reY23  imY23 ! 2nd row
       reY31  imY31  reY32  imY32  reY33  imY33 ! 3rd row

Y- (Z-) Parameter 4-port MA and RI File Formats

 #  frequency_unit  Y  MA  R  impedance
 freq magY11 angY11  magY12  angY12  magY13  angY13  magY14  angY14 ! 1st row
      magY21 angY21  magY22  angY22  magY23  angY23  magY24  angY24 ! 2nd row
      magY31 angY31  magY32  angY32  magY33  angY33  magY34  angY34 ! 3rd row
      magY41 angY41  magY42  angY42  magY43  angY43  magY44  angY44 ! 4th row
 
 #  frequency_unit  Y  RI  R  impedance
 freq  reY11  imY11  reY12  imY12  reY13  imY13  reY14  imY14 ! 1st row
       reY21  imY21  reY22  imY22  reY23  imY23  reY24  imY24 ! 2nd row
       reY31  imY31  reY32  imY32  reY33  imY33  reY34  imY34 ! 3rd row
       reY41  imY41  reY42  imY42  reY43  imY43  reY44  imY44 ! 4th row

Y- (Z-) Parameter 3-port File Example

 ! symbol  freq-unit  parameter-type  data-format  keyword  impedance-ohms
     #     GHz     Y     MA     R      1
 ! freq  magY11  angY11  magY12  angY12  magY13  angY13  ! 1st line
 !       magY21  angY21  magY22  angY22  magY23  angY23  ! 2nd line
 !       magY31  angY31  magY32  angY32  magY33  angY33  ! 3rd line
 
    4   0.008    83.122   8.5e-04   -86.740   0.007    -98.037
        0.046   -12.740   0.005      36.580   0.049    171.554
        0.046   177.588   0.004    -152.638   0.050      0.134
    8   0.016    79.068   0.002     -84.015   0.014   -102.924
        0.049   -23.015   0.006      52.828   0.051    164.123
        0.048   175.827   0.005    -139.640   0.052     -0.004
   12   0.025    73.501   0.003     -81.736   0.023   -109.374
        0.058   -36.736   0.009      58.596   0.058    152.007
        0.055   169.129   0.007    -136.047   0.059     -5.349
   18   0.036    65.138   0.004     -71.761   0.033   -119.900
        0.059   -54.761   0.013      72.274   0.052    137.118
        0.052   162.979   0.010    -121.976   0.055     -6.677

Y- (Z-) Parameter 5- to 99-port File Formats

These file formats appear in a matrix form similar to 3- and 4-port files. Only four Y-, or Z-parameters (with 2 real numbers for each) can appear on a given line; therefore, the remaining parameters in that row of the matrix continue on the next line of the file. Each row of the Y-matrix must begin on a new line of the file. The first line of the first row of the Y-matrix begins with the frequency value. The actual Y- (Z-) parameter value is obtained by dividing (multiplying) the file entry with the reference resistance.

Y- (Z-) Parameter 10-port File Example (at one frequency)

 #   frequency_unit   Y   MA   R   impedance
 freq magY11 angY11 magY12 angY12 magY13 angY13 magY14 angY14 ! 1st row
 magY15 angY15 magY16 angY16 magY17 angY17 magY18 angY18
 magY19 angY19 magY1,10 ngY1,10
 
 magY21 angY21 magY22 angY22 magY23 angY23 magY24 angY24 ! 2nd row
 magY25 angY25 magY26 angY26 magY27 angY27 magY28 angY28
 magY29 angY29 magY2,10 angY2,10 
 
 magY31 angY31 magY32 angY32 magY33 angY33 magY34 angY34 ! 3rd row
 magY35 angY35 magY36 angY36 magY37 angY37 magY38 angY38
 magY39 angY39 magY3,10 angY3,10 
 
 magY41 angY41 magY42 angY42 magY43 angY43 magY44 angY44 ! 4th row
 magY45 angY45 magY46 angY46 magY47 angY47 magY48 angY48
 magY49 angY49 magY4,10 angY4,10 
 
 magY51 angY51 magY52 angY52 magY53 angY53 magY54 angY54 ! 5th row
 magY55 angY55 magY56 angY56 magY57 angY57 magY58 angY58
 magY59 angY59 magY5,10 angY5,10 
 
 magY61 angY61 magY62 angY62 magY63 angY63 magY64 angY64 ! 6th row
 magY65 angY65 magY66 angY66 magY67 angY67 magY68 angY68
 magY69 angY69 magY6,10 angY6,10 
 
 magY71 angY71 magY72 angY72 magY73 angY73 magY74 angY74 ! 7th row
 magY75 angY75 magY76 angY76 magY77 angY77 magY78 angY78
 magY79 angY79 magY7,10 angY7,10 
 
 magY81 angY81 magY82 angY82 magY83 angY83 magY84 angY84 ! 8th row
 magY85 angY85 magY86 angY86 magY87 angY87 magY88 angY88
 magY89 angY89 magY8,10 angY8,10 
 
 magY91 angY91 magY92 angY92 magY93 angY93 magY94 angY94 ! 9th row
 magY95 angY95 magY96 angY96 magY97 angY97 magY98 angY98
 magY99 angY99 magY9,10 angY9,10 
 !10th row
 magY10,1 angY10,1 magY10,2 angY10,2 magY10,3 angY10,3 magY10,4 angY10,4 
 magY10,5 angY10,5 magY10,6 angY10,6 magY10,7 angY10,7 magY10,8 angY10,8 
 magY10,9 angY10,9 magY10,10 angY10,10

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