[[Image:PMOM9.png|thumb|300px|EM.Picasso's Substrate Layer dialog.]]
[[Image:pmom_phys5.png|thumb|400px|EM.Picasso's Virtual Domain Settings dialog.]]
=== Understanding the Background Structure ===
You can delete a layer by selecting its row in the table and clicking the '''Delete''' button. To move a layer up and down, click on its row to select and highlight it. Then click either the '''Move Up''' or '''Move Down''' buttons consecutively to move the selected layer to the desired location in the stack-up. Note that you cannot delete or move the top or bottom half-spaces.
=== Editing Substrate Layers ===After creating a substrate layer, you can always edit its properties in the Layer Stack-up Settings dialog. Click on any layer's row in the table to select and highlight it and then click the '''Edit''' button. The substrate layer dialog opens up, where you can change the layer's label and assigned color. In the material properties section of the dialog, you can change the name of the material and its properties: permittivity (e<sub>r</sub>), permeability (µ<sub>r</sub>), electric conductivity (s) and magnetic conductivity (s<sub>m</sub>). To define electrical losses, you can either assign a value for electric conductivity (s), or alternatively, define a loss tangent for the material. In the latter case, check the box labeled "'''Specify Loss Tangent'''" and enter a value for it. In this case, the electric conductivity field becomes greyed out and reflects the corresponding s value at the center frequency of the project. You can also set the thickness of any substrate layer in the project units except for the top and bottom half-spaces.
After creating a substrate layerFor better visualization of your planar structure, you can always edit its properties in the Layer Stack-up Settings dialogEM. Click on any layer's row Picasso displays a virtual domain in the table a default orange color to select and highlight it and then click represent part of the '''Edit''' buttoninfinite background structure. The substrate layer dialog opens up, where you can change size of this virtual domain is a quarter wavelength offset from the layer's label and assigned color. In largest bounding box that encompasses all the material properties section of finite objects in the dialog, you project workspace. You can change the name size of the material and virtual domain or its properties: permittivity (e<sub>r</sub>), permeability (µ<sub>r</sub>), electric conductivity (s) and magnetic conductivity (s<sub>m</sub>). To define electrical lossesdisplay color from the Domain Settings dialog, which you can access either assign a value for electric conductivity (s), or alternatively, define a loss tangent for by clicking the material'''Computational Domain''' [[File:domain_icon. In png]] button of the latter case'''Simulate Toolbar''', check the box labeled or by selecting '''Simulate "gt;Computational Domain > Domain Settings...'''Specify Loss Tangentfrom the Simulate Menu or by right clicking the '''" Virtual Domain''' item of the Navigation Tree and enter a value for itselecting '''Domain Settings. In this case..''' from the contextual menu, or using the electric conductivity field becomes greyed out keyboard shortcut '''Ctrl+A'''. Keep in mind that the virtual domain is only for visualization purpose and reflects does not affect the corresponding s value at the center frequency of the projectMoM simulation. You can The virtual domain also set the thickness of shows the substrate layer layers in the project unitstranslucent colors. Note that If you cannot change the thickness assign different colors to your substrate layers, you have get a better visualization of the top and bottom half-spaces. You can only change their material propertiesmultilayer virtual domain box surrounding your project structure.
=== Defining Traces & Object Sets ===
You can manage your project's layer hierarchy from the Layer Stack-up Settings dialog. You can add, delete and move around substrate layers, metallic and slot traces and embedded object sets. Metallic and slot traces can move among the interface planes between neighboring substrate layers. Embedded object sets including PEC vias and finite dielectric objects can move from substrate layer into another. When you delete a trace from the Layer Stack-up Settings dialog, all of its objects are deleted from the project workspace, too. You can also delete metallic and slot traces or embedded object sets from the Navigation Tree. To do so, right click on the name of the trace or object set in the Navigation Tree and select '''Delete''' from the contextual menu. You can also delete all the traces or object sets of the same type from the contextual menu of the respective type category in the Navigation Tree.
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For better visualization of your planar structure, [[EM.Cube]] displays a virtual domain in a default orange color to represent part of the infinite background structure. The size of this virtual domain is a quarter wavelength offset from the largest bounding box that encompasses all the finite objects in the project workspace. You can change the size of the virtual domain or its display color from the Domain Settings dialog, which you can access either by clicking the '''Computational Domain''' [[File:domain_icon.png]] button of the '''Simulate Toolbar''', or by selecting '''Simulate > Computational Domain > Domain Settings...''' from the Simulate Menu or by right clicking the '''Virtual Domain''' item of the Navigation Tree and selecting '''Domain Settings...''' from the contextual menu, or using the keyboard shortcut '''Ctrl+A'''. But keep in mind that the virtual domain is only for visualization purpose and does not affect the MoM simulation. The virtual domain also shows the substrate layers in translucent colors. As you change the colors assigned to the substrate layers, you will see a multilayer virtual domain box surrounding your project structure.
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[[File:pmom_phys5.png]]
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Figure 1: [[Planar Module]]'s Virtual Domain Settings dialog.
By default, the last defined trace or embedded object set is active. You can activate any trace or embedded object set at any time for drawing new objects. You can move one or more selected objects from any trace or embedded object set to another group of the same type or of different type. First select an object in the project workspace or in the Navigation Tree. Then, right click on the highlighted selection and select '''Move To >''' from the contextual menu. This opens another sub-menu containing '''Planar''' and a list of all the other [[EM.Cube]] modules that have already defined object groups. Select '''Planar''' or any other available module, and yet another sub-menu opens up with a list of all the available traces and embedded object sets already defined in your project. Select the desired group, and all the selected objects will move to that group. When selecting multiple objects from the Navigation Tree, make sure that you hold the keyboard's '''Shift Key''' or '''Ctrl Key''' down while selecting a group's name from the contextual menu.
You couple two or more sources using the '''Port Definition Dialog'''. To do so, you need to change the default port assignments. First, delete all the ports that are to be coupled from the Port List of the dialog. Then, define a new port by clicking the '''Add''' button of the dialog. This opens up the Add Port dialog, which consists of two tables: '''Available''' sources on the left and '''Associated''' sources on the right. A right arrow ('''-->''') button and a left arrow ('''<--''') button let you move the sources freely between these two tables. You will see in the "Available" table a list of all the sources that you deleted earlier. You may even see more available sources. Select all the sources that you want to couple and move them to the "Associated" table on the right. You can make multiple selections using the keyboard's '''Shift''' and '''Ctrl''' keys. Closing the Add Port dialog returns you to the Port Definition dialog, where you will now see the names of all the coupled sources next to the name of the newly added port.
{{Note|It is your responsibility to set up coupled ports and coupled [[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|[[Transmission Lines|transmission lines]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]] properly. For example, to excite the desirable odd mode of a coplanar waveguide (CPW), you need to create two rectangular slots parallel to and aligned with each other and place two gap sources on them with the same offsets and opposite polarities. To excite the even mode of the CPW, you use the same polarity for the two collocated gap sources. Whether you define a coupled port for the CPW or not, the right definition of sources will excite the proper mode. The couple ports are needed only for correct calculation of the port characteristics.}}
[[File:PMOM51(2).png|800px]]