What is WIPL-D company?
WIPL-D d.o.o. is a privately-owned company dedicated to development of commercial EM software and consulting in the wide field of electromagnetism.
What does the abbreviation WIPL-D stand for?
WI stands for wires, PL stands for plates, and D stands for dielectrics.
What is WIPL-D software suite?
WIPL-D software suite is a full 3D EM simulation tool consisted of two main products (WIPL-D Pro CAD and WIPL-D Pro) and different add-on tools (for circuit analysis, optimization, GPU acceleration, etc.)
What is WIPL-D Pro?
WIPL-D Pro is a general 3D electromagnetic solver that analyzes arbitrary metallic and/or dielectric structure in the frequency domain.
What is the theoretical basis of WIPL-D Pro kernel?
MoM (Method of Moments) / (surface integral equations) / surfaces equivalence theorem / wires - right truncated cones (cylinders) / plates - bilinear surfaces (flat quads) / wire-to-plate junctions / automatic meshing of electrically large plates / polynomial approximation of currents (higher order, rooftop) / automatic satisfaction of current continuity at free ends and multiple junctions / LU decomposition / CG iterative method. (The kernel of WIPL-D Pro is an original product and is theoretically well documented with more than 30 referenced IEE and IEEE journal and conference articles.)
What is the difference between Lite and Pro version?
WIPL-D Lite was a limited license of WIPL-D Pro v6, distributed through Artech House (released over 10 years ago). The software was distributed along with the book and was intended to students, hobbyists, small business customers, private consultants and commercial users who solve electrically small problems. Since that time, WIPL-D Pro has been evolving as a commercial product with numerous features added. WIPL-D Lite is no available for purchase anymore. Instead, we offer WIPL-D Starter.
Who are intended users?
The intended users are engineers (both in industry and research facilities), scientists and graduate students. The primary use is the research and design of various types of antennas, scatterers, passive microwave circuit components, as well as solving EMC/EMI, antenna placement, radome and other common EM problems. The software package is also used in teaching and popular among entrepreneurs, consultants, hobbyists…
How one can test the software?
The software can be tested by trying the 30-day demo (check the WIPL-D Community and DEMO section) or by requesting a benchmark from our team.

Advantages of WIPL-D software

What is the advantage of WIPL-D software over codes using wire-grid modeling?
Wire grid EM simulation originates in the beginning of EM simulation tools development, especially for the shielding problems. Since WIPL-D suite uses wires as mesh entity, it is possible to simulate wire grid models. However, such modelling requires a lot more mesh elements and unknowns than the modelling via quadrilateral patches, which is the suggested method in WIPL-D. The EM simulation of solid metallic surfaces modelled as wire grids is much more time consuming. Also, creating wire grid models manually is demanding so advanced algorithms are necessary. Plus, wire grid modelling is not applicable to dielectric surfaces. WIPL-D suite supports both approaches but the modelling via surface patches is recommended.
What is the advantage of the WIPL-D software over the FEM and MoM/VIE based programs?
WIPL-D kernel applies MoM/SIE, where the the unknown quantities are surface currents. In the FEM and MoM/VIE, the unknown quantities are volume fields and currents. Hence, the total number of unknowns and analysis time required by the MoM/SIE are typically much lower than those of the FEM and MoM/VIE. Additionally, the FEM and MoM/VIE have difficulties in modelling wire and thin plate structures. Another major difference is the absence of the bounding box for radiating problems. WIPL-D can simulate two antennas using the same requirements whether they are separated 1 or 100 wavelengths.
What is the advantage of WIPL-D software over time domain analysis?
WIPL-D software performs analysis in the frequency domain (one frequency point after another, sometimes simultaneously at multiple CPU/GPU/nodes). In order to obtain the same result by time domain analysis, the analysis should be performed in a sufficient time interval. After that, the Fourier transform must be applied. This is an indirect way of obtaining results in the frequency domain and because of that it is less efficient.
What is the advantage of the WIPL-D software over the FD-TD?
WIPL-D kernel applies MoM/SIE, which means it does not use absorbing boundary conditions and discretization of the volume outside of the simulation model. The accuracy of the FD-TD modeling is mostly related to the discretization quality and minimum one discretization point per tenth of the wavelength is recommended. In case of electrically moderate or large structures, the approach yields a very high number of discretization points. As an end result, this typically leads to extremely long computation time. If the required EM result is simulated at single frequency or at finite number of frequencies, it may be expected that WIPL-D software needs an order of magnitude smaller computation time.
What is the advantage of the WIPL-D software over codes that treat substrates as infinite layers?
WIPL-D suite simulates multilayers structures in a realistic way, as finite size 3D EM problems (finite size dielectric volumes). This includes printed elements, vias, holes etc. In EM simulation, such layers can sometimes be treated as infinite layers of dielectric (as in 2d or 2.5D solvers), but this is always an approximation used in order to speed up simulations and reduce requirements.
What is the advantage of WIPL-D software over codes based on triangle patch modeling?
WIPL-D software is based on quadrilateral patch modeling, which is two timed more efficient than rooftop basis function. In addition, WIPL-D Pro combines quadrilateral modeling with higher order basis functions, thus requiring an order of magnitude less number of unknowns than classical triangular modeling (mesh elements up to 2 lambda). Typical rooftop elements need to be lambda/10, lambda/8, lambda/6 for stable and accurate results.
What are the options for speeding-up the solution in WIPL-D?
Numerous. First of all, the users need to adapt to the fact WIPL successfully applies higher order basis functions. In practice this means that entire microstrip patch antenna (typically 0.5 lambda by 0.5 lambda) should be modeled as a single mesh element (plate). Next, all large EM problems are treated by special features to decrease number of unknowns where possible (antenna placement reduction, shadow reduction, specific features for reflectors and radomes, reduction of simulation referent frequency…). Such numerically efficient model is simulated by using advantage of parallel processing. CPUs with multiple cores/threads are used in the most efficient way (nearly 100%). For electrically moderate and large EM problems, the tremendous speed-up in WIPL-D is achieved by using GPU acceleration, with an add-on to WIPL-D Pro. It uses one or more GPU cards to solve problems which cannot be solved in reasonable time by using only CPU. GPU solver takes advantage of both RAM and hard-disk resources. WIPL-D technical support team offers customers unlimited assistance to simulate their projects more efficiently.

EM Problems One Can Solve Using WIPL-D Software

What are the typical electrical quantities provided by WIPL-D software?
WIPL-D software provides current distribution over the structure's surface, network parameters of multiport devices (y, z, s-parameters), radiation pattern of antennas, antenna arrays and other radiating structures, and near field everywhere inside and outside the structure (e.g., inside EMC facilities, inside human tissues, and in the vicinity of antennas).
What are the typical antennas and antenna arrays that WIPL-D software can handle?
Yagi-Uda arrays / log-periodic antennas / wire and strip helicoidal antennas / metallic or dielectric horns excited by probe fed waveguides / reflector antennas with feeds and feed struts / slotted waveguide arrays / microstrip patch antennas over finite substrates / dielectric rod and resonator antennas / lens antennas.
May I model antennas mounted on vehicles (airplanes) and still use PC for modeling?
YES. WIPL-D software offers very effective calculation. The required number of the unknowns per square wavelength for electrically large plates is very small (10-20). This is the essential difference and advantage over other frequency domain codes. Using 15000 unknowns and 3 symmetry planes WIPL-D Pro can handle structures up to 10 000 wavelength squared.
Does WIPL-D software take into account influence of a radome on antenna characteristics?
YES. WIPL-D software offers very precise modeling of radomes as dielectric bodies, or very efficient modeling using distributed loading option.
May I model antennas above the real ground using WIPL-D Pro?
YES. The influence of ground on the current distribution is taken into account by a ground clamp below the antenna.
Can I use WIPL-D Pro to de-embed s-parameters of multiport devices, modeled together with real feeding structures?
YES. The de-embedding procedure for the s-parameter extraction is provided as a feature of the WIPL-D Pro. You can even apply the procedure to determine s-parameters of new types of discontinuities of new types of guiding structures.
Is WIPL-D software able to model and analyze planar (single and multi-layer) structures?
YES. However, WIPL-D software models planar structures as finite-size structures. (All layers are modeled as finite-sized bodies. Ground planes can be modeled as infinite PECs, or as finite-size metallic plates).
Can I calculate complex waveguide junctions and filters using WIPL-D software?
YES. WIPL-D software is already tested and applied for designs of the 3D dielectric filters for a large wireless company, with success. Waveguide structures, corrugated horn antennas with feedings, cavity filter designs are tested.
May I efficiently model 3D TEM cell and other EMC facilities by WIPL-D software?
YES. Owing to high efficiency, the analysis can be performed at very high frequencies (at which 3D cell becomes electrically very large). Due to smart interpolation, WIPL-D Pro obtains response in wide frequency range using reduced number of frequency samples.


May I specify lossy materials, with possibly high dielectric and magnetic constant?
YES. Stable results are obtained if product of relative electric and magnetic constant is less than 1000.
Can I take into account skin-effect losses?
YES. Skin-effect is treated as specific distributed loading. You can define different specific conductivities for various wires, plates, or their groups.
May I take into account end effect or abrupt changes in wire radius of fat wires?
You can adjust independently starting and ending wire radius. Wire end can be represented as almost flat cone, while abrupt change of wire radius can be represented as almost flat frill.
How can I model curved surfaces with quadrilateral surface patches?
Since the year of 2012, we introduced two different modeling ways: one through WIPL-D Pro and the other through our add-on tool called WIPL-D Pro CAD. WIPL-D software uses quadrilateral meshing and in WIPL-D Pro quads are the simplest surfaces defined by four arbitrary-spaced nodes. In particular, WIPL-D Pro has routines for creation of some basic curved surfaces (spheres, ellipsoids, super spheroids, parabolic surfaces, etc.). On the other hand, WIPL-D Pro CAD is a tool for 3D solid modeling with almost automating meshing capability. WIPL-D Pro CAD has various built-in primitives along with different types of manipulations and Boolean operations.
Is there any limitation regarding wire-to-plate junctions?
NO. You can attach a wire in the middle of a plate, to plate edge, to plate corner, to wedge and to tip of a metallic body. It is only recommended not to connect more than two wires to a plate.
Is it possible to import different CAD formats into WIPL-D?
YES. WIPL-D Pro CAD allows import and conversion of the following formats: Parasolid, Stereolitography, CATIA v4, CATIA v5, Pro/Engineer, Unigraphics, Inventor, Solidworks, ACIS (SAT), IGES, STEP and VDA-FS
How should I perform structure optimization?
WIPL-D Pro offers very easy symbolic definition of the geometrical sizes, including symbol definition by the mathematical combination of the different symbols, previously defined. This allows simple control of the key parameters to be optimized. WIPL-D Optimizer enables you to optimize your structure to satisfy some given criteria. All efficient optimization routines are available, including Genetic algorithm, Simulated Annealing, Simplex, Gradient, Random and Systematic Search.

WIPL-D Community and DEMO

What is WIPL-D demo?
WIPL-D demo is a free 30-day trial of the latest release of WIPL-D software.
How can I get WIPL-D demo?
WIPL-D demo can be downloaded from our web-site upon the registration in WIPL-D community. It also comes on a CD inside the promotional brochure that is being handed out by our representative on the shows we attend worldwide.
What's in the WIPL-D Demo download?
The download contains executables, pdf manuals, and example projects.
Should I uninstall any previous demo version of WIPL-D software?
Please uninstall any old versions of the software and delete the entire WIPL-D installation folder.
I registered into WIPL-D Community and got message to confirm the registration by verifying my e mail address (click the link in e-mail), but I got no e-mail?
Sometimes, our e-mails end up into SPAM folder, so please check your SPAM e-mail. If our e-mail is not there, please contact us so we can complete your registration manually.

WIPL-D Software: Licensing & Setup Info

When opening the WIPL-D software for the first time, the software asks for a password. Which is it?
The initial password is: wipl (4 characters). You can change the password in Configure/Password
Which Operating Systems are supported?
WIPL-D software is supported on 64-bit Windows 7, 8.x, 10 and Windows Server 2003/2008, …. Support for Windows Vista and lower version is no longer available. Also, version for 32-bit systems can be made per user request except for GPU add-ons, which are only supported on 64-bit systems. The kernel can run on Linux platforms as well. For more information about Linux platforms and cluster options, contact our sales department.
Which are the hardware requirements?
For more info on hardware requirements, please check our Support/Configure WIPL-D Software page.
How can I check which version of software I run?
Open Help>About submenu. The opened window shows information about the license.

Pricing Info

How can I get a price for the software?
You can contact our sales department and get the quotation for any product you might need.
What comes with the WIPL-D software suite?
WIPL-D software is consisted of WIPL-D Pro (MoM numerical kernel and basic modeler) and various add-on tools (for CAD modelling and CAD import, for optimization, for time domain analysis, etc.).
What is the price for professional WIPL-D software license?
The price of the software is formed based on the items included in the license (WIPL-D Pro and add on tools if there are any included). For more detailed explanation and official price list, please send your request to Sales team.
How the price for WIPL-D Pro is formed?
The price for WIPL-D Pro depends on the number of unknowns and supported number of threads. The number of unknowns depends much on the size of the problem you need to simulate. The default number of supported threads is 4 - support for more threads is available for the additional fee.
How many unknowns I need?
To give you an idea how many unknowns you would need, it usually takes around 30 unknowns per lambda x lambda patch in case of metallic structures, while it requires twice as much for dielectrics.
What options are there for purchasing of the software?
Software can be purchased in a form of permanent license or rented on a yearly basis depending on your needs and budget.
Are there any discounts for small companies/ start-ups?
Yes, we offer certain discount for small companies and start-ups. For more info, please contact Sales.

Company Info

When was the company founded?
The first commercial product was soled back in 1995, while WIPL-D d.o.o. (HQ office in Belgrade) was formally founded in 2002.
Where are your offices located?
WIPL-D HQ is located in Belgrade, Serbia, while we have distributors worldwide – please have a look at our Representatives page.
Where people can meet your representatives in person?
Each year we attend conferences worldwide (USA, Europe, etc.). For more info, please check our News&Events section on the web-site, the category labeled as “Events”.
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