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How can I remove the hole in ground plane and add the wire probe in this step file ? [v 2023.1]
Here I am attaching the Step file of a probe fed microstrip patch. This step file already have a cylindrical probe attached with the patch. Also there is a hole in the ground plane of the antenna. How can I remove the cylindrical probe from this file and can add wire probe? How can I fill up this ground plane hole in this…
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POWER CALCULATION FOR array antenna(V 2023.1)
Hello I am using an "active port" simulation for a 4x1 conformal probe-fed antenna array. My question is: when we select the voltage source for each port (see the screenshot), it is 1 V for each port in my array. Then what is actually the input power of my total array ? For doing the active port simulation, see my other…
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Altair Feko: What's new in Feko 2026
Highlights of the 2026 Release The Feko 2026 release features extensions to many different solvers - enhancing Feko's capabilities in propagation modelling, network planning as well as general and specialist EM analysis application areas. There are various performance improvements, interoperability, and API extensions,…
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FEKO How to set and check local mesh?
I want to assign different solver settings to different regions of my .stl model, which imposes requirements on the triangle (mesh) size. I have already set the mesh size for triangle label 0_1 to lambda/10, but I'm still getting the following error: Triangle 50669 is too large (surface/lambda^2 = 2.14301E+01) ERROR 120:…
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hwFeko2025.1 Can not be installed on windows 11
Hi, i am trying to install Feko2025 on windows 11. However there is an issue that causes the installation process to stop. The InstallAnywhere proceeds to 100% then it stops and closes. Instead of opening the splash screen as described in the installation guide, nothing happens. I am admin on my machine, and executed the…
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Feko: Reciprocal Excitation solution configuration – CADFEKO and POSTFEKO workflow
Overview The antenna reciprocity theorem [1] relates the antenna load current for given plane wave excitation to the radiation pattern when the antenna is excited. The antenna is assumed to be made of linear and reciprocal components. With the CADFEKO Reciprocal Excitation solution configuration, the antenna load response…
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Rotman Lens Toolkit for Feko
Rotman Lens is a two dimensional, wide-angle microwave lens capable of steering a beam through the use of input ports being individually excited. The number of input ports determine the resolution of the steerability of the beam, and the angle of the outermost ports determines the full angle of the steerability. A white…
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Issue with Student License Activation in FEKO
To whom it may concern, I am experiencing an issue with my FEKO student license. Although my key appears to be active, I am unable to get the software running properly. I have followed the setup procedure using the “almutil_gui.exe” utility as described in the documentation, but the error persists. For your reference, see…
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Coax-Fed and Line-Fed Dipole Models in FEKO — Feed Simplification
Hello, I am working on modeling a simple planar dipole antenna in Altair FEKO using two different feeding approaches. My goal is to simplify the feed model for use in array simulations with an infinite ground plane, while ensuring that the results remain consistent with a more physically detailed coaxial feed model and…
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can anybody check my file and where i am going wrong, reflection coefficient is nearly 0 ?
https://us.v-cdn.net/6038102/uploads/E4PUY9A83QIG/model-mod.cfx I am expecting the reflection co-efficient (db) least than -10db but i have no clue where i am doing worng??
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can anybody explain how to optimize my s11 parameter and gain?
https://us.v-cdn.net/6038102/uploads/M0Z7XNW8Q3R8/model-mod.cfx while i am trying to run OPTFEKO it is throwing error 180…….
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How can I fix this triangular mesh error 2331? Feko V 2025.1
https://us.v-cdn.net/6038102/uploads/Y3V3DHB3937P/model.cfx hello, I’m getting FEKO error 2331: “Two triangular surface patches overlap” in my antenna model. It happens when meshing the patch and ground layers in my stacked geometry. Could someone explain how to fix overlapping surface meshes or misaligned solids in…
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How should I set thickness in the face media property window ?
In Feko, I can choose "thickness" when entering a media for one of my layers : Should i set it to be of the thickness of my antenna ? For example, my antenna here is a flat metallic sheet of 1mm of thickness. Is 1e-3 the right parameter here ? Thx !
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Action Required: Update to Linux RHEL/CIQ Rocky 9.4 for HyperWorks 2026 Release
Introduction To our valued Altair community, This article provides important advance notice regarding a required change for the upcoming HyperWorks 2026, which is scheduled for release later this year. To maintain the highest standards of security and performance, we are updating the supported Linux operating system…
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Why is my License not recognized.
HelloI have a recurring issuse with my Feko throwing the following error messages on startup. The software has worked a few days ago, the license is valid. For whatever reason, i seem to completely miss the "altair_lic.dat" file I am looking forward to any helpful inputs. Error message: An error occurred while checking out…
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FEKO on Linux
Hello, I was wondering if the student edition license can be used on a linux machine? Thanks!
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Extracting Power flux density in W/m2 from Postfeko using Lua script
Hi Community, I am writing a lua script to extract power flux density (PFD) from postfeko. Below is the metadata of the nearfield data using Getdata() function. DataSet: Number of axes = 2 Frequency axis spanning from XX Hz to YY Hz with n values. Number of quantities = 7 EFieldComp1 is a Complex with the unit V/m…
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FEKO cannot connect to TUM academic license — verified student on Altair One but no license availabl
Hello Altair Support Team, I am a student at Technische Universität München (TUM) and have already verified my Altair One account using my university email (go34tej@tum .de). However, when launching Altair FEKO 2025.1, I receive the following error: “Error Code: 9 – Feature not found License Path: C:\Program…
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Mesh Model Import issue
I trying to import a Mesh model of an Fighter Aircraft in Feko. I have generated a mesh on it in hypermesh 2025 version. And exported the file as a .fhm file. but ,while importing the fhm file in feko it was throwing me the below shown error.Can Anybody please help getting over this issue?
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FEKO Problem with Magnetic symmetry and plane wave
Hello, I am building an antenna, symmetric according to (XZ) plane and excited by a plane wave, polarized with E field along (Y). The software complains about the symmetry in regard to the polarization. Here are the error message from the log file, the plane wave setting and the symmetry settings. I suspect the mesh has an…
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Mutual Coupling between two SPH sources
1] I want to check the mutual coupling between two SPH sources separated by distance of 900mm. For that i have two SPH sources oriented in Broadside direction of Patch antenna array & 45 degree in XY plane.(Note : Both the sources are oriented in Azimuth plane). if we can check the mutual coupling between these equivalent…
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How to check the E-field value for calculating power handling capability of my antenna?[V 2023.1]
Hello, I want to check the power handling capability of my conformal array antenna; for that, I created the near-field surface from the top of the patches to the cylindrical…
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Issue when trying to run CAD FEKO
I'm trying to run CADFEKO v2025.1 and I am seeing a license error with the following message: "An error occurred while checking out a license. Altair License Manager: License error Feature(s): GlobalZoneAM, HyperWorks, HWFEKOGUI Error Code: 9 Error Description: Feature not found" What could be causing this issue? I was…
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Problem with student license FEKO 2025.1.1
Hello, I have a problem with my student license of FEKO. Here is my error : "An error occurred while checking out a license. Altair License Manager: License error Feature(s): GlobalZoneEU, HyperWorks, HWFEKOGUI Error Code: 9 Error Description: Feature not found License Path:…
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Is it possible to deactivate a license for renewal without access to the previous device?
I recently had my hard drive corrupt and when I went to open up Feko again to use my student license, it said "Error activating license: This license was already activated using different HostIDs." However, I don't have access to the other one so I can't deactivate it. Is there an easy way to get around that?
