![fdtd antenna simulator fdtd antenna simulator](http://a.fsdn.com/con/app/proj/fdtdantennasimu/screenshots/198010.jpg)
- #FDTD ANTENNA SIMULATOR HOW TO#
- #FDTD ANTENNA SIMULATOR FULL VERSION#
- #FDTD ANTENNA SIMULATOR MOVIE#
- #FDTD ANTENNA SIMULATOR PATCH#
Basically, there's a demonstrable need for a user-friendly 3D high frequency electromagnetics simulator in the open-source space, but nobody's picked it up yet. Still, you can solve small problems with it, like basic microstrip antennas.
#FDTD ANTENNA SIMULATOR FULL VERSION#
It's got most of the features of the full version but the mesh size is heavily restricted. FEKO is a professional EM field sim comparable to HFSS or CST which has a big list of solvers: MoM, FEM, FDTD, and UTD, as well as several hybrid MoM-FEM solvers. FEKO Lite is the free version of FEKO (registration required).
#FDTD ANTENNA SIMULATOR PATCH#
You can also do patch antennas with it, but you can't view the far-field patterns unless you buy the full version, so it'd be good for tuning return loss only. It's good for simple printed transmission line structures like microstrip, hybrid couplers, and filters. Very similar product to Agilent Momentum that's included in ADS. Sonnet Lite is the free version of Sonnet, which is a planar EM simulator based on the Method of Moments. Also, the license prohibits commercial use. Unfortunately, development has stalled and apparently it's difficult to run on Windows on the latest Python. The main drawback I can see is that as it's more of a physics research package it doesn't include postprocessing features helpful for EE, namely s-parameter output and far-field radiation pattern computation - you'd need to write your own postprocessor. Looks more like it's geared towards photonics applications, although the physics are the same. If you can handle the lack of UI, this package is the best truly free option right now. Again - making a UI would be a great weekend project if anyone's looking.
![fdtd antenna simulator fdtd antenna simulator](http://cdn.comsol.com/wordpress/2015/04/Corrugated-circular-horn-antenna-app.png)
The main drawback is the interface - there's no UI, rather, the software is used programmatically through a MATLAB/Octave frontend. As an FDTD package, it will be a lot more memory heavy than a FEM or MoM simulator, but RAM is cheap these days. OpenEMS is a free FDTD (Finite Difference Time Domain) simulator suitable for a wide range of computational EM problems. There's definitely a demand for a modern 3D CAD type frontend, if anyone's looking for a weekend project. There are a few graphical interfaces available (4NEC2 is the most popular free one) but they are all pretty old. It's a command line program that takes a text file input, where each line of text represents an 80 column punched card in a card stack. It was originally written in the 1970s at Lawrence Livermore National Lab, so the interface leaves much to be desired. A quick summary of the options that *are* free: NEC-2 is a public domain Method-of-Moments (MoM) simulator suitable mainly for wire antennas and some planar antennas which do not rely on dielectric structures (so no patch antenna simulations). It's getting to the point where I'm seriously considering writing my own FDTD engine. I believe this is caused by the diffraction and fringing of the aperture which is not taken into account by Balanis in his analysis of a waveguide aperture.Quote from: Kelbit on January 23, 2016, 09:10:25 am I have been searching for a good free 3D field simulator for a while. In addition, there seems to be some non-uniform continuity in the back. The directivity shows what seems to be one main back lobe.
#FDTD ANTENNA SIMULATOR MOVIE#
To do this, I had to manipulate already published script/code to obtain data which is otherwise not an already written function/script output.įigure 3 shows the directivity of the waveguide aperture and you can find the FDTD simulation in Figure 4, which shows a movie of the actual electric field magnitude squared simulation being pulsed (initially a Gaussian pulse with center frequency at 15GHz and cutoffs at 10GHz and 20GHz). I was able to reproduce a well known solution to a problem to test my understanding and proper usage of OpenEMS and FDTD. ABC should be placed at least half wavelength from the antenna.
![fdtd antenna simulator fdtd antenna simulator](https://www.matecdev.com/img/bempp.png)
#FDTD ANTENNA SIMULATOR HOW TO#
I learned how to properly use OpenEMS to model antennas via the FDTD algorithm by setting up proper mesh and boundary conditions and other parameters. MUR can be applied in any case and its implementation takes into account the conformal cells. Relative Magnitude of Electric field given in Antenna Theory by Balanis