Learning Forum

[robb.raffaelli]

I am sweeping frequency from 10k to 20MHz and cannot get simulation to run. Is there a simple video in the trianing forum you can recommend for trying to excite a coaxial fed loop antenna using lumped ports for the center conductor and shield? See errors below, and thank you for your help.

 

Robb

 

[info] GRPC server running on port: 50051.

  HFSSDesign1 (Terminal Network)

    [info] Parts Circle2 and Center_Conductor intersect. Center_Conductor will take precedence in the region of intersection. (06:02:07 PM  Feb 08, 2025)

    [info] Parts Circle2 and Cylinder4 intersect. Circle2 will take precedence in the region of intersection. (06:02:07 PM  Feb 08, 2025)

    [info] Parts Circle2 and Cylinder2 intersect. Circle2 will take precedence in the region of intersection. (06:02:07 PM  Feb 08, 2025)

    [error] Tau first attempt and classic second attempt both failed (06:02:07 PM  Feb 08, 2025)

    [info] Failed to delete temporary files on server 'localhost'. You may want to manually delete directory 'C:\Users.....

    [error] Simulation completed with execution error on server: Local Machine. (06:02:14 PM  Feb 08, 2025)

    [error] No conductors were found on port '2', so auto assignment of conductors on that port cannot proceed. (06:13:47 PM  Feb 08, 2025)

    [info] Solution Setup 'Setup1': Multiple frequencies adapt is not supported in a design without active ports. Solve setup has been changed to use single frequency adapt. (06:15:33 PM  Feb 08, 2025)

    [info] Solution Setup 'Setup1': Multiple frequencies adapt is not supported in a design without active ports. Solve setup has been changed to use single frequency adapt. (06:17:40 PM  Feb 08, 2025)

    [error] Terminals cannot be assigned because either there are no conducting objects or all conducting objects have been designated as terminal reference conductors. (06:20:06 PM  Feb 08, 2025)

    [error] Terminals cannot be assigned because either there are no conducting objects or all conducting objects have been designated as terminal reference conductors. (06:20:49 PM  Feb 08, 2025)

    [error] No conductors were found on port '2', so auto assignment of conductors on that port cannot proceed. (06:22:35 PM  Feb 08, 2025)

New_Coax_New_Helix_H_Field (C:/Users....

  HFSSDesign1 (Terminal Network)

    [info] Parts Polyline5 and Inner_Conductor_E_Field_Plate1_Split2 intersect. Polyline5 will take precedence in the region of intersection. (11:37:19 AM  Feb 01, 2025)

    [info] Parts Polyline5 and Dielectric_Split1 intersect. Polyline5 will take precedence in the region of intersection. (11:37:19 AM  Feb 01, 2025)

    [info] Parts Polyline5 and Sphere2 intersect. Sphere2 will take precedence in the region of intersection. (11:37:19 AM  Feb 01, 2025)

    [info] Parts Inner_Conductor_E_Field_Plate1_Split2 and Sphere2 intersect. Sphere2 will take precedence in the region of intersection. (11:37:19 AM  Feb 01, 2025)

    [info] Failed to delete temporary files on server 'localhost'. You may want to manually delete directory 'C:\Users\....

    [info] Normal completion of simulation on server: Local Machine. (11:38:22 AM  Feb 01, 2025)

  HFSSDesign2 (Terminal Network)

    [warning] HFSSDesign2: Solutions have been invalidated. Undo to recover. (02:14:55 PM  Feb 08, 2025)

 

[Praneeth]

Hi Robb, 

Thank you for reaching out to the Ansys learning forum. Your patience is much appreciated.

It looks like the port assignment is not proper, so you are getting some related errors. Please see if the coax feed is connected properly to the antenna or you can share screenshots to help us serve you better.

Best regards,
Praneeth,
Click here to join Electronics Community and build a network. 

[robb.raffaelli]

Praneeth, do you have an email I can forward the file to? Hopefully you can have a look and see what mistake I made setting up the ports, I cannot seem to figure out what is giving the issue.

 

Very Respectfully,

 

Robb

 

 

 

[Praneeth]

Hi Robb,

Please note that Ansys personnel cannot share email addresses and cannot access the attachments on the forum because of export restrictions.

You can use Antenna toolkit available under "ACT extensions" which can create standard antennas for your reference. Please go through some free video based Ansys Innovation Courses on how to use this toolkit - Microstrip Patch Antenna Creation Using Ansys HFSS Antenna Toolkit — Lesson 3 | ANSYS Innovation Courses.

In addition, there are example projects available through "Open Examples > HFSS > Antennas". 

Best regards,
Praneeth.