Test cases marked with **** are not yet running correctly. An outline
of the issue is included.

AVAILABLE TEST CASES

Simple two conductor configurations

TWO_WIRE
 
Single mode propagation on a two wire transmission line.
AC analysis
 
TWO_WIRE_TRANSIENT
 
Single mode propagation on a two wire transmission line.
Transient analysis

WIRE_OVER_GROUND_PLANE
 
Single mode propagation on a wire with ground plane return
AC analysis
  
Simple multi-conductor configurations
 
THREE_WIRE_RIBBON_CABLE

Two mode propagation on three parallel wires.
The test case is configured for AC crosstalk analysis as described in C.R. Paul,
"Analysis of Multiconductor Transmission Lines" 1st edition, Wiley. Section 4.8.1
 
FOUR_WIRE_BUNDLE

The four wire bundle consists of four identical cylindrical conductors arranged 
at the corners of a square. The symmetry and the homogeneous cross section 
means that the modes are degenerate.
 
Test cases which make use of the library of cable models (MOD)

SINGLE_WIRE_MOD

This test case creates a cable model of a cylindrical condcutor and places it
in the library of cable models
 
TWO_WIRE_MOD

This test case reproduces the TWO_WIRE test case above but uses the single_wire
cable model in MOD. The bundle model and spice cable bundle model are also 
placed in MOD
 
TWO_WIRE_TRANSIENT_MOD

This test case reproduces the TWO_WIRE_TRANSIENT test case above but uses the single_wire
cable model in MOD. The bundle model and spice cable bundle model are also 
placed in MOD
 
WIRE_OVER_GROUND_PLANE_MOD

This test case reproduces the WIRE_OVER_GROUND_PLANE test case above but uses the single_wire
cable model in MOD. The bundle model and spice cable bundle model are also 
placed in MOD
 
TWO_WIRES_OVER_GROUND_PLANE_MOD

This test case models two wires over a groound plane and uses the single_wire
cable model in MOD. The bundle model and spice cable bundle model are also 
placed in MOD
  
Test cases for different cable types

COAX

Coaxial cable propagation test
 
TWINAX

Twinax cable propagation test. 
The model runs but has not yet been properly validated.
 
TWINAX_LAPLACE

Twinax cable propagation test using the numerical Laplace solver for the L,C matrix calculations. 
The model runs but has not yet been properly validated.

SHIELDED_TWISTED_PAIR

Shielded twisted pair propagation test. 
The model runs but has not yet been properly validated.

SHIELDED_TWISTED_PAIR_LAPLACE

Shielded twisted pair propagation test using the numerical Laplace solver for the L,C matrix calculations. 
The model runs but has not yet been properly validated.
  
SPACEWIRE

Spacewire propagation test.
 The model runs but has not yet been properly validated.
 
SPACEWIRE_LAPLACE

Spacewire propagation test using the numerical Laplace solver for the L,C matrix calculations.
The model runs but has not yet been properly validated.
 
TEST_ALL_CABLE_TYPES

This test case generates cable models for all the cable types.
The model runs but the individual cable models have not yet all been properly validated.

Overshield tests
 
COAX_FREE_SPACE

This test case models a coaxial cable with free space dielectric properties.
It is used to check the overshield model (OVERSHIELD_COAX_FREE_SPACE).
 
OVERSHIELD_COAX_FREE_SPACE

The COAX_FREE_SPACE cable bundle configuration is built from a cylindrical conductor and 
circular overshield.
 
COAX_FREE_SPACE_OVER_GROUND_PLANE

This test case models a coaxial cable with free space dielectric properties
over a ground plane. It is used to check the overshield model 
(OVERSHIELD_COAX_FREE_SPACE_OVER_GROUND_PLANE).
 
OVERSHIELD_COAX_FREE_SPACE_OVER_GROUND_PLANE

The COAX_FREE_SPACE_OVER_GROUND_PLANE cable bundle configuration is built 
from a cylindrical conductor and circular overshield along with a ground plane.
 
Multiple domain test cases

COAX_OVER_GROUND_PLANE

Coaxial cable over a ground plane. Note there is no transfer impedance coupling.
 
TWIN_COAX

Two parallel coaxial cables. Note there is no transfer impedance coupling.

TWIN_COAX_OVER_GROUND_PLANE 

Two parallel coaxial cables over a gorund plane. Note there is no transfer impedance coupling.

TWISTED_PAIR_OVER_GROUND_PLANE

Twisted pair over a gorund plane. Note there is no transfer impedance coupling.

Frequency dependent test  cases

FD_TWO_WIRE

Analysis of propagation on a two wire transmission line with frequency dependent 
'skin effect' model.

FD_TWO_WIRE_TRANSIENT

Transient analysis of propagation on a two wire transmission line with frequency dependent 
'skin effect' model.

FD_COAX

Analysis of propagation on a coaxial cable with frequency dependent 
'skin effect' model applied to the inner conductor and a frequency
dependent (debye model) dielectric. Note that there is no transfer
impedance in this model.

FD_COAX_TRANSIENT

Tansient analysis of propagation on a coaxial cable with frequency dependent 
'skin effect' model applied to the inner conductor and a frequency
dependent (debye model) dielectric. Note that there is no transfer
impedance in this model.
 
FD_THREE_WIRE

Analysis of propagation on a three wire transmission line with frequency dependent 
'skin effect' model. This tests the multi-mode propagation correction. 
 
Transfer impedance test cases

ZT_FD_COAX

Analysis of propagation on a coaxial cable with frequency dependent 
'skin effect' model applied to the inner conductor and a frequency
dependent (debye model) dielectric. There is also a transfer
impedance included in this model of the form R+jwL.
The model tests the coaxial mode propagation only. 

ZT_FD_COAX_AND_SINGLE_WIRE

Analysis of coupling from a coaxial mode on a frequency dependent 
coax cable onto an external circuit throught the transfer impedance
of the coax shield. The transfer impedance is of the form R+jwL.
 
ZT_TWIN_COAX

Analysis of coupling from a coaxial mode on a frequency dependent 
coax cable onto the coaxial model of a parallel coaxial cable through
an external circuit consisting of the two shields i.e. there are two
transfer impedance coupling terms included, first from internal to 
external mode and the second from the external to the internal mode.
The transfer impedance is of the form R+jwL.

ZT_FD_COAX_AND_SINGLE_WIRE_FREE_SPACE

Analysis of coupling from a coaxial mode on a frequency dependent 
coax cable onto an external circuit throught the transfer impedance
of the coax shield. The transfer impedance is of the form R+jwL.
The coax dielectric is free space in this test so that the result can
be compared to the same problem set up using a cylindrical conductor 
and an overshield (see below).

ZT_WIRE_WITH_OVERSHIELD_AND_SINGLE_WIRE

This is the same configuration as ZT_FD_COAX_AND_SINGLE_WIRE but the
coax is made of a cylindrical conductor and overshield. 

ZT_MULTI_MODE_1S_2V

Transfer impedance test case consisting of one wire in the source domain 
within an oversheild and two wires outside.in the victim domain  

ZT_MULTI_MODE_2S_1V

Transfer impedance test case consisting of two wires in the source domain 
within an oversheild and one wire outside.in the victim domain  

ZT_MULTI_MODE_2S_2V

Transfer impedance test case consisting of two wires in the source domain 
within an oversheild and two_wires outside.in the victim domain  

ZT_MULTI_MODE_2S_2V_REV

Transfer impedance test case consisting of two wires in the source domain 
outside an oversheild and two_wires inside.in the victim domain  

ZT_MULTI_MODE

Transfer impedance test case consisting of two wires within an oversheild
and three more wires outside.  

Incident field excitation test cases

TWO_WIRE_INCIDENT_FIELD_EXCITATION

Incident field excitation of a two wire transmission line 

THREE_WIRE_INCIDENT_FIELD_EXCITATION

Incident field excitation of a three wire transmission line 

COAX_OVER_GROUND_PLANE_INCIDENT_FIELD_EXCITATION

Incident field excitation of a coax cable over a ground plane

Laplace solver test cases

THREE_WIRE_LAPLACE

Two mode propagation on three parallel wires.
The test case is configured for AC crosstalk analysis as described in C.R. Paul,
"Analysis of Multiconductor Transmission Lines" 1st edition, Wiley. Section 4.8.1
The per-unit-length parameters are calculated using the numerical (Finite Element) Laplace solver

WIRE_OVER_GROUND_PLANE_LAPLACE
 
Single mode propagation on a wire with ground plane return
AC analysis
The per-unit-length parameters are calculated using the numerical (Finite Element) Laplace solver

OVERSHIELD_COAX_FREE_SPACE_LAPLACE

The COAX_FREE_SPACE cable bundle configuration is built from a cylindrical conductor and 
circular overshield.
The per-unit-length parameters are calculated using the numerical (Finite Element) Laplace solver

The following test cases are for the revised shield loss model in which the transfer impedance and
the shield conductor loss models are distinct.

ZT_FD_COAX2_AND_SINGLE_WIRE
FD_COAX2
ZT_FD_SHIELDED_TWISTED_PAIR2
ZT_FD_SHIELDED_TWISTED_PAIR2_OVER_GROUND
ZT_FD_TWINAX2_OVER_GROUND
ZT_FD_SPACEWIRE2_OVER_GROUND


TWISTED_PAIR_AND_SINGLE_WIRE_OVER_GROUND_PLANE_CM

Check the common mode coupling of the twisted pair model

TWISTED_PAIR_AND_SINGLE_WIRE_OVER_GROUND_PLANE_DM

Check that there is no differential mode couplign in the twisted pair model.



************************************************************************

Test cases which test the limits of the models
 
LONG_LOSSY_CABLE

This tests the propagation correction on a 10m length of frequency dependent 
transmission line
 
COMPLEX_BUNDLE
 
FD_LARGE_BUNDLE****

This test cases allows the production of a test case with an arbitrary number
of conductors so as to test whether there are any limits to the complexity
of cable bundles which may be modelled in Spice using this approach. 
The test case directory contains a FORTRAN code which should be compiled (make)
and run. The user is then asked for a number of conductors. The code then generates
the files required for a test case consisting of the required number of conductors
arranged in a row i.e. a ribbon cable.

The test case runs however problems are seen when using lossy models in ngspice 
with large numbers of conductors e.g. first order propagation correction model
with 20 conductors. Note that this test case does work in LTspice.
 
FD_LARGE_BUNDLE_TRANS****

This test cases allows the production of a test case with an arbitrary number
of conductors so as to test whether there are any limits to the complexity
of cable bundles which may be modelled in Spice using this approach. 

A cable with 50 conductors has been simulated using this test case although
the propagation correction was incorrect in this case for the reason outlined
above.


SHIELDED_TWISTED_PAIR_OVER_GROUND_10m

shielded twisted pair over ground - 10m length

SHIELDED_TWISTED_PAIR_OVER_GROUND_1m

shielded twisted pair over ground - 1m length

Thes last two test cases were used to test many bundle models connected in series. Here
10x 1m bundle models were connected in series and the results compared to the 10m model.
The comparison is not in the TEST_CASES as it is beyond the scope of the automatic
validation model.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

FULL TEST CASE LIST:

Working test cases run from the automatic script

COAX
COAX_AND_SINGLE_WIRE_EINC
COAX_AND_SINGLE_WIRE_EINC_REORDER
COAX_AND_SINGLE_WIRE_EINC_REORDER_TRANSIENT
COAX_AND_SINGLE_WIRE_REORDER
COAX_AND_TWO_WIRES_EINC
COAX_AND_TWO_WIRES_EINC_REORDER
COAX_AND_TWO_WIRES_EINC_REORDER_TRANSIENT
COAX_FREE_SPACE
COAX_FREE_SPACE_OVER_GROUND_PLANE
COAX_OVER_GROUND_PLANE
COAX_OVER_GROUND_PLANE_EINC
COAX_OVER_GROUND_PLANE_INCIDENT_FIELD_EXCITATION
COMPLEX_BUNDLE
CONNECTOR_AND_WIRE
CONNECTOR_OVER_GROUND_PLANE
DOUBLE_SHIELDED_COAX_AND_SINGLE_WIRE_OVER_GROUND_PLANE
DOUBLE_SHIELDED_COAX_AND_SINGLE_WIRE_OVER_GROUND_PLANE_2
DSUB_CONNECTOR
EINC_ZT_MULTI_MODE_1S_1V
EINC_ZT_MULTI_MODE_1S_2V
EINC_ZT_MULTI_MODE_2S_2V
EINC_ZT_TV_EQ_TS
EINC_ZT_TV_EQ_TZ
EINC_ZT_TZ_ZERO
FD_COAX
FD_COAX2
FD_THREE_WIRE
FD_TWISTED_PAIR_OVER_GROUND_PLANE
FD_TWO_WIRE
FD_TWO_WIRE_TRANSIENT
FLEX_CABLE_3_AND_SINGLE_WIRE_EINC
FLEX_CABLE_3_CONDUCTOR
FLEX_CABLE_3_EINC
FLEX_CABLE_3_GROUND_PLANE
FLEX_CABLE_3_OVERSHIELD
FLEX_CABLE_DIELECTRIC_3_CONDUCTOR
FLEX_CABLE_LOSSY_2_CONDUCTOR
LONG_LOSSY_CABLE
OVERSHIELD_COAX_FREE_SPACE
OVERSHIELD_COAX_FREE_SPACE_LAPLACE
OVERSHIELD_COAX_FREE_SPACE_OVER_GROUND_PLANE
OVERSHIELD_TWINAX_DIELECTRIC_LAPLACE
SHIELDED_TWISTED_PAIR
SHIELDED_TWISTED_PAIR_LAPLACE
SHIELDED_TWISTED_PAIR_OVER_GROUND_10m
SHIELDED_TWISTED_PAIR_OVER_GROUND_1m
SINGLE_WIRE_MOD
SPACEWIRE
SPACEWIRE_LAPLACE
THREE_WIRE_DIELECTRIC_LAPLACE
THREE_WIRE_INCIDENT_FIELD_EXCITATION
THREE_WIRE_LAPLACE
THREE_WIRE_RIBBON_CABLE
TWINAX
TWINAX_AND_TWO_WIRES
TWINAX_AND_TWO_WIRES_REORDER
TWINAX_LAPLACE
TWIN_COAX
TWIN_COAX_OVER_GROUND_PLANE
TWISTED_PAIR_AND_SINGLE_WIRE_OVER_GROUND_PLANE_CM
TWISTED_PAIR_AND_SINGLE_WIRE_OVER_GROUND_PLANE_DM
TWISTED_PAIR_OVER_GROUND_PLANE
TWISTED_PAIR_OVER_GROUND_PLANE_LAPLACE
TWO_COAX_OVER_GROUND_CROSSTALK
TWO_RECTANGULAR_CONDUCTORS
TWO_WIRE
TWO_WIRE_DIELECTRIC_GROUND_PLANE_LAPLACE
TWO_WIRE_FD_DIELECTRIC_LAPLACE
TWO_WIRE_INCIDENT_FIELD_EXCITATION
TWO_WIRE_MOD
TWO_WIRES_OVER_GROUND_PLANE_MOD
TWO_WIRE_TRANSIENT
TWO_WIRE_TRANSIENT_MOD
WIRE_OVER_GROUND_INCIDENT_FIELD_EXCITATION
WIRE_OVER_GROUND_PLANE
WIRE_OVER_GROUND_PLANE_LAPLACE
WIRE_OVER_GROUND_PLANE_MOD
ZT_FD_COAX
ZT_FD_COAX2_AND_SINGLE_WIRE
ZT_FD_COAX2_AND_SINGLE_WIRE_BIDIRECTIONAL_1
ZT_FD_COAX2_AND_SINGLE_WIRE_BIDIRECTIONAL_2
ZT_FD_COAX_AND_SINGLE_WIRE
ZT_FD_COAX_AND_SINGLE_WIRE_FREE_SPACE
ZT_FD_SHIELDED_TWISTED_PAIR
ZT_FD_SHIELDED_TWISTED_PAIR2
ZT_FD_SHIELDED_TWISTED_PAIR2_OVER_GROUND
ZT_FD_SPACEWIRE
ZT_FD_SPACEWIRE2
ZT_FD_SPACEWIRE2_OVER_GROUND
ZT_FD_TWINAX
ZT_FD_TWINAX2_OVER_GROUND
ZT_MULTI_MODE
ZT_MULTI_MODE_1S_2V
ZT_MULTI_MODE_2S_1V
ZT_MULTI_MODE_2S_2V
ZT_MULTI_MODE_2S_2V_REV
ZT_TWIN_COAX
ZT_TWIN_COAX_INCIDENT_FIELD_EXCITATION
ZT_TWIN_COAX_INCIDENT_FIELD_EXCITATION_USE_XIE
ZT_WIRE_WITH_OVERSHIELD_AND_SINGLE_WIRE
COAX_AND_SINGLE_WIRE
COAX_AND_SINGLE_WIRE_EINC_TRANSIENT
COAX_AND_TWO_WIRES_EINC_TRANSIENT

Directory for testing the calculation of frequency dependent transfer impedance and surface impedance
for braided shields.

SHIELD_TRANSFER_IMPEDANCE_AND_SURFACE_IMPEDANCE_CALCULATION