Estimating Nearly Square CP Element Parameters — Ansoft Designer 7.0 在线帮助文档，Ansys Designer 教程

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Estimating Nearly Square CP Element Parameters

Use this command to estimate the dimensions of a nearly square, circularly polarized (CP) element. The feed points for these patches are not arbitrary. For a nearly square patch, you need to feed the patch at the corner of the patch.

Before using this command, keep the following things in mind:

• The values estimated by this command are for the current active layer only. Depending on the substrate parameters, the patch parameters may be different for patches on different layers; therefore, it is important that you are on the desired metal layer before accessing this command.

• This command is disabled if your structure does not contain ground planes or if it contains two ground planes and you have selected a metal layer between them.

• The method used to estimate the patch parameters is an approximate method based on the cavity model; therefore, the values given are only rough estimates.

To estimate a CP nearly square patch:

1. Select the trace layer on which the patch lies.

2. Click Printed Antennas>CP Nearly Square. Estimate parameters appear on the right side of the Estimate module’s window.

3. Enter the frequency in the Frequency box, in GHz. This frequency is independent of the maximum frequency entered in the solution setup.

4. Click Calculate to perform the estimate. The estimated information appears in the following boxes:

Horizontal Length

Displays the dimension of the perturbed patch in the horizontal or x direction in the current working units.

Vertical Length

Displays the dimension of the perturbed patch in the vertical or y direction in the current working units.


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