Learning Forum

[ramon_ea1gth]

I guess this is a minor issue (small bug?), but puzzled me for a while when practicing with the document 'Getting Started with HFSS 3D Layout: Slot Fed Patch Antenna'.

Page 28, section 'Create Return Loss Report' indicates: 'In the Project Manager, under Analysis> PlanarEM right-click Sweep 1 and select Results> Plot Templates> Return Loss from the shortcut menu.'

When this action is done, the report is displayed but with no trace. The reason is found in the Properties window of the report: the chosen X Component is the non-existent variable F, instead of the variable Freq. Once changed the X Component to the existent variable Freq, the trace is displayed. However, if this report is launched from the Results ribbon, Standard report icon, select 2D, Category S Parameter, the report is correctly created with the trace and Freq as the default X Component.

I am using ANSYS Electronics Desktop 2021 R1.

On the other hand, there was some discussion about the definition of return loss and I would expect positive values in dB for the return loss (as opposed to the usual S11 negative values), as commented here:

T. S. Bird, "Definition and Misuse of Return Loss [Report of the Transactions Editor-in-Chief]," in IEEE Antennas and Propagation Magazine, vol. 51, no. 2, pp. 166-167, April 2009, doi: 10.1109/MAP.2009.5162049.

https://ieeexplore.ieee.org/document/5162049?arnumber=5162049

[Praneeth]

Thank you for reaching to us and we appreciate your patience on this issue.
We have verified at our side, and the plot is shown as per the getting started guide (GSG).
Kindly check if some settings were changed at your side.
I will suggest to start from blank session of AEDT as shown in the GSG and try to see at your end.
All the very best.