Design and Analyze H-Notch Patch Using Design Variables
This example shows how to define the metal patch, dielectric, and ground plane layers in H-notch using design variables in the PCB Antenna Designer app.
Open New Session
Type this command at the command line to open the PCB Antenna Designer app.
On the Design tab, click New Session to start a new session and open a blank canvas.
Define Board Shape
To design a PCB stack, you must first define a board shape. Select Rectangle from the
Shapes section on the toolbar. Drag the shape on the canvas to create a rectangle.
Use the Design Variables tab to add variables for the board center, board length, and board width. To add a new variable, click . Add the following to the table:
Add the variables to the
Rectangle1 properties tab.
Add Ground, Metal, and Dielectric Layer
Click Add Layer on the toolbar and then select Metal Layer to add a metal layer.
Set the Name of the metal layer to
Click Add Layer on the toolbar and then select Dielectric Layer to add a dielectric layer
Click Add Layer on the toolbar and then select Metal Layer to add a metal layer. Set the name of this layer to
HNotchLayer on the PCB Stack navigation tree and then
select Rectangle from the Shapes section on the toolbar. Drag the shape onto the canvas to create a rectangular patch.
Use the Design Variables tab to set the properties of the HPatch
Create Top Notch
Select Rectangle from the Shapes section and drag the shape to the top of the shape to create a top notch in the patch layer. Set the properties of
Rectangle3 to the following using the Design Variable tab.
Create Bottom Notch
TopNotch from the canvas and then copy the layer by clicking Copy in the Actions section. Click Paste to paste a copy of
TopNotch. Doing so creates a rectangle
TopNotch_Copy_1 with identical dimensions to the
Set the properties of
TopNotch_Copy_1 to the following:
Subtract Top and Bottom Notch Layers from Metal Patch
TopNotch and then click Subtract in the Shapes section of the toolbar to remove both rectangles.
BottomNotch and click Subtract in the Shapes section of the toolbar to remove both rectangles.
Set Dimensions for Ground Plane
The ground plane must be same size as the
HNotchLayer. To make the ground plane the same size as
HPatch and select Copy.
GroundPlane and click Paste on the toolbar to paste the rectangle in the
The app copies the rectangle to the ground plane layer with the name
HPatch have the same dimensions.
Set the properties of
HPatch_Copy(1) to the following:
HNotchLayer metal layer on the PCB Stack navigation tree and then click Add Feed in the Feed Via section on the toolbar. You can add a feed only to a metal layer.
As the PCB Stack navigation tree shows, the app adds the feed to
Select the parent
Feed node on the PCB Stack navigation tree, and then set the FeedDiameter to
1 and FeedViaModel to
Strip. FeedDiameter is a global property.
Change Position of Feed
Feed1 on the PCB Stack navigation tree. In the Properties pane, set Center to
In the 3D-View pane, you can see that the feed is connected only to
Change Start Layer and Stop Layer
Connect the feed from HNotchLayer to GroundPlane by setting StartLayer to HNotchLayer and StopLayer to GroundPlane. This creates a feed on the GroundPlane which connects to the HNotchLayer.
Change Metal Properties
Layers in on the PCB Stack navigation tree and set the Type of the metal layer to
Copper in the Properties pane.
Click Validate Design on the toolbar to validate your board shape, layers, feed, via, and load.
Analyze H-Notch Unit Element
In the Analysis tab, set the Center Frequency to
4.65 GHz and Frequency Range to
Select Impedance from the Vector Frequency Analysis section on the toolbar to plot the impedance plot. The impedance plot shows that the PCB stack antenna resonates at 4.6 GHz.
Click 3D Pattern from the Scalar Frequency Analysis section on the toolbar to plot the 3-D far-field radiation pattern of the antenna. The directivity of the H-notch patch unit element is 5.93 dBi.