Design H-Notch Patch Unit Element

This step of the tutorial shows how to design an unit element for a 1-by-2 H-notch linear array. You design the H-notch unit element by subtracting the top and bottom notches from the substrate.

Create H-Notch

Select the `HNotchLayer` on the PCB Stack navigation tree and then `s`elect Rectangle from the Shapes section on the toolbar. Drag the shape onto the canvas to create a rectangular patch.

Set the properties of `Rectangle2` to the following:

• Name `HPatch`

• Center`[0,0]`

• Length`20`

• Width`20`

Click the Canvas Settings button and select Snap to grid to allow easier and more accurate drawing. Then set the Grid Size to `0.5` mm.

The app displays the drawn shape.

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:

• Name `TopNotch`

• Center`[0,7]`

• Length`6 `

• Width`6`

Create Bottom Notch

Select `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 `TopNotch` layer.

Set the properties of `TopNotch_Copy_1` to the following:

• Name `BottomNotch`

• Center`[0,-7]`

Subtract Top and Bottom Notch Layers from Metal Patch

Select `HPatch` and `TopNotch` and then click Subtract in the Shapes section of the toolbar to remove both rectangles.

The app updates the `HPatch` layer.

Select the `HPatch` and `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`, right-click `HPatch` and select Copy.

Right-click the `GroundPlane` and click Paste on the toolbar to paste the rectangle in the `GroundPlane`.

The app copies the rectangle to the ground plane layer with the name `HPatch_Copy(1)`. `HPatch_Copy(1)` and `HPatch` have the same dimensions.

Set the properties of `HPatch_Copy(1)` to the following:

• Name `GroundPlaneRect`

• Center`[0,7]`

• Length`23 `

• Width`23`

Select the `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 `HNotchLayer` as `Feed1`.

For more information on feeds and vias, refer to the `FeedLocation` and `ViaLocation` properties in the documentation of the `pcbStack` object.

Change Properties of Feed

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

Select `Feed1` on the PCB Stack navigation tree. In the Properties pane, set Center to `[-3,-3]`.

In the 3D-View pane, you can see that the feed is connected only to `HNotchLayer`.

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

Select the `Layers` in on the PCB Stack navigation tree and set the Type of the metal layer to `Copper` in the Properties pane.

Validate Design

Click Validate Design on the toolbar to validate your board shape, layers, feed, via, and load.