Overbraid

Also known as overshields, outershields, or oversleeves, overbraids are types of shields that are generally fabricated using braided strands and are commonly wrapped around one or more cables as a secondary fabrication step. MHARNESS includes properties for a variety of common stranded copper-tinned overbraids whose parameters were experimentally measured and several types of Glenair overbraids. If twisted cables are desired, clickhere.

Instructions

Click Cabling within the Harness section under the MHARNESS tab in the Ribbon. Then select Overbraid from the drop-down menu.
Using the select line tool, select the line segments that comprise the overbraid by left clicking them individually or by using the lasso function. The selected segments will turn blue and the line junctions will show as blue dots. The red, boxed U at each end point stands for unterminated endpoint.
Using the select point tool, select the unterminated endpoints. They will turn yellow.
In the HUD, click the ellipsis next to Definition. Click the Library Tab, expand the desired overbraid category, and finally select the overbraid type. If the overbraid has been previously used in the project, the type can also be selected from the Local Tab, rather than the Library Tab. Note when applying a cable type from the local tab that all cables defined with that specific cable name will share the same properties; therefore, it is recommended that the Short Name be assigned in the cable metadata.
After choosing the type, the properties of the overbraid can be changed within the Properties Panel.
Click OK to complete the definition.
Adjust the definitions of the Overbraid at any time by right clicking it within the Simulation Tree and selecting Edit from the pop-up menu.
To view a cross section of the overbraid after it has been created, select the Inspect Cross Section tool from the Harness section within the MHARNESS tab of the ribbon and hover over the overbraid line.

General

Options

Entry	Meaning
Definition	Local definition type assigned to this overbraid.
Overbraid Shape	Overbraid geometry type.

Ellipse Geometry

Ellipse Geometry Options

Entry	Meaning
X-Radius	Overbraid radius along X (horizontal) axis [mm].
Y-Radius	Overbraid radius along Y (vertical) axis [mm].

Polygon Geometry

Polygon Geometry Options

Entry	Meaning
Width	Width of rectangular overbraid [mm].
Height	Height of rectangular overbraid [mm].

Circular Geometry

Circular Geometry Options

Entry	Meaning
Radius	Minimum radius of overbraid [mm].
Twisted	Should the contents be twisted [T/F].
Pitch	Contents twist rate [twists/m].

Terminations

Terminations Options

Entry	Meaning
Junction Count	Number of junctions in the proposed route.
Terminations	Termination points in the proposed route.

Resistance

Resistance Options

Entry	Meaning
Value Type	Constant value or radius-dependent (estimate) of resistance.
Value	Resistance value [Ω/m].
Area	Minimum area of overbraid [mm^2]. Calculated, not user-entered.
Skin Depth Effects	Does the overbraid exhibits frequency dependent skin depth effects? [T/F].
Conductivity	DC conductivity of overbraid [S/m].
Thickness	Thickness of the overbraid [mm].

Jacket

Jacket Options

Entry	Meaning
Thickness	Thickness of the jacket [mm].
Dielectric	Dielectric constant of the jacket.
Color	Color of the jacket.

Filler

Filler Options

Entry	Meaning
Thickness	Thickness of the background filler material [mm].
Dielectric	Dielectric constant of the background filler material.
Color	Color of the background filler material.

Transfer Inductance

Transfer Inductance Options

Entry	Meaning
Transfer Inductance	Transfer inductance properties of the overbraid.
Method	Method for defining braid parameters [Measured/Analytic].
Transfer Inductance Analytic Model	Transfer inductance analytical approximation model.
Value	Transfer inductance value [H/m]. Only active for Measured Method and Constant Value Type.
Value Type	Is the Value constant or radius-dependent?
Construction	Construction type of the overbraid.
Strand Radius	Radius of wire strands composing the overbraid [mm].
Strand Conductivity (σ)	Conductivity of wire strands composing the overbraid [S/m].
Strand Count	Number of strands per carrier.
Carrier Count	Number of carriers in a braid.
Weave Angle	Weave angle of wire strands composing the overbraid [deg].
Tube Conductivity (σ)	Conductivity of the tube composing the overbraid [S/m]. Only active for Tubular Construction.
Tube Thickness	Thickness of the tube composing the overbraid [m]. Only active for Tubular Construction.

Loss Tangent Parameters

Loss Tangent Parameters Options

Entry	Meaning
Enable Loss Tangent	Enable loss tangent for this overbraid? [True/False].
Loss Tangent	Loss tangent value.
Measured Frequency	Frequency at which the loss tangent was measured [MHz].

Metadata

Metadata Options

Entry	Meaning
Part Number	Manufacturer part number of the overbraid [optional].
Company	Name of company that manufactures the overbraid [optional].
Category	Category or type of the overbraid [optional].
Abbreviation	Abbreviated reference of the overbraid [optional].
Description	Description of the overbraid [optional].
Short Name	Short name for the overbraid [optional].
Long Name	Longer name for the overbraid [optional].
Version	Version of the overbraid [optional].
Signal ID	ID for the signal on the overbraid [optional].