Download GENESYS 2003 Enterprise Simulation

Simulation
dialog, and the input mode number can be changed in the Port mode to excite box. The
control information about what input and what mode are actually excited in the structure
is printed out in the listing file (see “PPLT: Input __ mode ___ will be incident.” in the
listing file).
An output binary file with the extension .EMV is created by EMPOWER to pass data to
the viewer program. (In a GENESYS Workspace, the internal name of this file is
EMPOWER.EMV) An optional self-documented ASCII data file with extension .PLX
can also be written for import into other programs.
To understand the viewer, a review of EMPOWER input and mode representations is
helpful. A circuit can have external and/or internal inputs. External inputs are
transformed to eigenmode space, de-embedded, and normalized to characteristic
impedances of eigenmodes. They could be one-mode or multimode (modally coupled)
and the incident wave for these inputs can be one of the input eigenmodes. The incident
wave is a harmonic function of time. Its magnitude is unity, and it corresponds both to
one Watt instantaneous power and 1/2 Watt time averaged power. The initial phase of the
incident wave is zero. Other eigenmodes of the structure are terminated by their
characteristic impedances and are perfectly matched. It numerically represents a row of
the generalized scattering matrix.
The internal ports are often locations where lumped elements will be included by
GENESYS.Parameters of the lumped elements are not required for the EMPOWER
simulation. Thus internal ports default to 1 ohm normalization. In this case, the viewer
data may not be as useful, since the lumped elements are not taken into account by the
viewer.
It is also possible to use an internal port as a source of energy to excite a structure. The
termination impedance can be specified using the option -NI<n>. In this case, the
internal inputs are terminated by virtual transmission lines with the specified characteristic
impedance. The unit incident wave is excited at the specified input. Note that if option NI<n> is used then the external inputs are also terminated by transmission lines (or loads)
with this impedance after de-embedding and transformation into the mode space if
necessary.
If the excitation conditions are defined, EMPOWER calculates the scattering matrix S
with default or defined normalization first. Then it creates an excitation vector
A=[0...,1,....,0] that contains only one unit element corresponding to the specified input.
The other elements of the vector are zeros. Reflected waves vector B are calculated from
the equation:
B=S*A
Then the simulator defines normalized voltages and currents in mode space, denormalizes
them, and restores the grid currents and voltages inside regions corresponding to all input
surface current regions. Finally, using the input region variables, the program calculates
non-zero grid currents Ig for strip-like structures or voltages Vg for slot-like structures.
The grid currents and voltages are locally defined model currents and voltages (see the
Theory section), and their units are Amperes and Volts accordingly. The grid currents and
voltages together with their coordinates on the grid are stored in the .EMV file. (The same
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