About AToM

The AToM (Antenna Toolbox for MATLAB) is written entirely in MATLAB, so the user will enjoy its semi-open architecture and friendly operation through GUI or direct access to low level functions. Main simulation core is based on Method of moments, both for 3D wire and planar structures. Together with modal decomposition (Characteristic modes), the source concept, feeding synthesis and powerful optimization (FOPS optimizer), it will present unique tool for analysis and synthesis of (small) antennas. Full list of AToM features is available below.

AToM Features

AToM Design Viewer with a capacitive loop antenna and active pick-point tool. The PEC symmetric plane is enabled and highlighted by green color.

AToM DesignViewer

Draw the antenna interactively, visualize mesh grid, feeding scenarios, and boundary conditions. Take the advantage of AToM Workspace.

List of user-defined AToM variables which parametrize the capacitive loop antenna.

AToM Workspace

Create own variables and use them freely throughout the AToM to parametrize all your models. AToM Workspace is the primary gateway between variables in MATLAB workspace and AToM.

Record of AToM History for capacitive loop antenna.

AToM History

Rely on automatic MATLAB-executable record of your AToM session. Modify it, send it, share it.

A segment of MATLAB code with AToM-executable commands (start of MoM solver and acquisition of the results).

AToM Syntax

Have a full control of the AToM workflow. Access all powerful low-level functions and features. Combine freely AToM commands and other MATLAB commands.

Complex fractal body discretized using local density function (discretization is finer where high amplitudes of current density are expected).

Advanced Mesher

Use fast and versatile AToM mesher. Set up local density functions. Enjoy various settings of uniform mesh grid and full support of symmetries.

Characteristic mode decomposition of hexagon with perfectly symmetrical mesh grid.

GEP With Extended Support For CMs

Try out the far most advanced characteristic modes decomposition package. Adaptive tracking, accurate decomposition, symmetry based-tracking, scalable GEP definitions... all at your disposal.

Radiation pattern of dominant characteristic mode on hexagon.

Results Browser

Analyze your results swiftly with standalone AToM Results Browser or dig directly into the deep study with underlying elementary functions.

... and more

From antenna body, through discretization grid and definition of basis functions to characteristic modes...

AToM Addons

A particular solution drawn in AntennaBuilder to maximize effective area of a receiving antenna.

Antenna Builder

Addon for AToM with easy controllable interface to design planar antenna structures. Various figure of metrics can be evaluated and optimized.

More about and download Antenna Builder...
Version 1.0
Requirements: AToM

Delaunay mesh grid of a horn antenna exported as vector graphics into LaTeX/TikZ and compiled as PDF.

AToM2TikZ

AToM2TikZ is a package for conversion of MATLAB plots generated by AToM into LATEX/TikZ macros. The strategy used to generate the plots is similar as for Matlab2TikZ package. AToM2TikZ can generate vector graphics for mesh grids, current plots, charge plots, radiation patterns, topology sensitivity samples, etc.

More about and download AToM2TikZ...
Version 1.0
Requirements: AToM

Optimal current for maximal radiation efficiency with self-resonant constraint. L-shape plate is made of copper, electrical size is ka=1/2. Graphical results exported with AToM2TikZ addon.

Fundamental Bounds

FunBo is a package for the computation of physical limitations on selected electromagnetic metrics based on linear or quadratic forms. A typical workflow contains definition of the optimization problem, evaluation of required method-of-moments (MoM) matrices, and initialization of an appropriate solver. AToM can be used to compute the matrices, utilizing either volumetric MoM or surface equivalence MoM. Many standard optimization problems (e.g., minimum Q-factor, maximum radiation efficiency, maximum gain) are already implemented in the package as examples. The package also allows to setup partial control over the total degrees of freedom using separation into the controllable and uncontrollble regions. Current examples are based on AToM functions evaluating the MoM matrices, however, the core functions of the package are standalone and can be also used with user supplied matrices.

More about Fundamental Bounds...
Version 1.0
Requirements: AToM

Gradient-based topology optimization of a PEC rectangular plate for minimization of radiation Q-factor. The electrical size is ka=1/2. Optimization has been slowed down approximately 1000 times.

Topology Optimization

More about Topology Optimization...
Not available yet
Requirements: AToM, FOPS

VOlumetric Method of Moments

Comming soon...

Download

The free version can be downloaded here. Visit download for more information.

Changelog

Documentation

AToM Documentation
(PDF, 4.69 MB)
version from Mar 23, 2020

AToM Features
(PDF, 895.12 kB)
version from Mar 27, 2020

AToM Functions
(PDF, 809.86 kB)
version from Mar 23, 2020

AToM Operators
(PDF, 481.75 kB)
version from May 24, 2021

Live Scripts

LS1: Meanders
(ZIP, 355.85 kB)
version from Jun 18, 2019

LS2: Symmetries
(ZIP, 364.01 kB)
version from Jun 10, 2020

White Papers

Analysis of dual-PIFA antenna polarization diversity
(PDF, 466.64 kB)
version from Oct 08, 2018

Analysis of four-arm electrically small helix antenna
(PDF, 420.04 kB)
version from Oct 08, 2018

Design of circularly polarized antenna
(PDF, 1.2 MB)
version from Oct 08, 2018

Fundamental Bounds to Time-Harmonic Quadratic Metrics in Electromagnetism: Overview and Implementation
(PDF, 1.08 MB)
version from Dec 16, 2023

Christmas cards

PF 2019
(PDF, 1.12 MB)
version from Dec 19, 2021

PF 2020
(PDF, 1.97 MB)
version from Dec 19, 2021

PF 2021
(PDF, 1.51 MB)
version from Dec 19, 2021

PF 2022
(PDF, 435.01 kB)
version from Dec 19, 2021

PF 2023
(PDF, 643.59 kB)
version from Dec 15, 2023

PF 2024
(PDF, 288.04 kB)
version from Dec 15, 2023

References

List of publications where AToM was cited.

Neuman, V., Capek, M., Jelinek, L., Lehtovuori, A., Viikari, V.: Trade-off Between Optimal Efficiency and Envelope Correlation Coefficient of MIMO for Antenna Clusters, IEEE Transactions on Antennas and Propagation, pp. 1-11, Accepted, 2023.
Capek, M., Jelinek, L.: Fundamental Bound on Maximum Gain as a Sum of Lossy Characteristic Modes and Its Feasibility, IEEE Transactions on Antennas and Propagation, pp. 1-13, Early Access, 2023.
Tucek, J., Capek, M., Jelinek, L., Sigmund, O.: Density-Based Topology Optimization in Method of Moments: Q-factor Minimization, IEEE Transactions on Antennas and Propagation, pp. 1-14, Early Access, 2023.
Capek, M., Jelinek, L., Kadlec, P., Gustafsson, M.: Optimal Inverse Design Based on Memetic Algorithms - Part 1: Theory and Implementation, IEEE Transactions on Antennas and Propagation, Vol. 71, No. 11, pp. 8806-8816, Nov. 2023.
Capek, M., Jelinek, L., Kadlec, P., Gustafsson, M.: Optimal Inverse Design Based on Memetic Algorithms - Part 2: Examples and Properties, IEEE Transactions on Antennas and Propagation, Vol. 71, No. 11, pp. 8817-8826, Nov. 2023.
Capek, M., Jelinek, L.: Transducer and Radiation Efficiency Figures of a Multiport Antenna Array, IEEE Transactions on Antennas and Propagation, Vol. 71, No. 7, pp. 6132-6137, Jul. 2023.
Lundgren, J., Schab, K., Capek, M., Gustafsson, M., Jelinek, L.: Iterative Calculation of Characteristic Modes Using Arbitrary Full-wave Solvers, IEEE Antennas and Wireless Propagation Letters, Vol. 22, No. 4, pp. 799-803, Apr. 2023.
Capek, M., Lundgren, J., Gustafsson, M., Schab, K., Jelinek, L.: Characteristic Mode Decomposition Using the Scattering Dyadic in Arbitrary Full-Wave Solvers, IEEE Transactions on Antennas and Propagation, Vol. 71, No. 1, pp. 830-839, Jan. 2023.
Schab, K., Jelinek, L., Capek, M., Gustafsson, M.: Upper Bounds on Focusing Efficiency, Optics Express, Vol. 20, Issue 25, pp. 45705-45723, Dec 2022.
Gustaffson, M., Jelinek, L., Schab, K., Capek, M.: Unified Theory of Characteristic Modes: Part II - Tracking, Losses, and FEM Evaluation, IEEE Transactions on Antennas and Propagation, Vol. 70, No. 13, pp. 11814-11824, Dec. 2022.
Gustaffson, M., Jelinek, L., Schab, K., Capek, M.: Unified Theory of Characteristic Modes: Part I - Fundamentals, IEEE Transactions on Antennas and Propagation, Vol. 70, No. 12, pp. 11801-11813, Dec. 2022.
Liska, J., Jelinek, L., Capek, M.: Performance Bounds of Magnetic Traps for Neutral Particles, Physical Review A, Vol. 106, 053110, Nov. 2022.
Losenicky, V., Jelinek, L., Capek, M., Gustafsson, M.: Method of Moments and T-matrix Hybrid, IEEE Transactions on Antennas and Propagation, Vol. 70, No. 5, pp. 3560-3574, May 2022.
Capek, M., Schab, K.: Computational Aspects of Characteristic Mode Decomposition - An Overview, IEEE Antennas and Propagation Magazine, Vol. 64, No. 2, pp. 23-31, April 2022.
Capek, M., Jelinek, L., Masek, M.: A Role of Symmetries in Evaluation of Fundamental Bounds, IEEE Transactions on Antennas and Propagation, Vol. 69, No. 11, pp. 7729-7742, Apr. 2021.
Masek, M., Jelinek, L., Capek, M.: Excitation of Orthogonal Radiation States, IEEE Transactions on Antennas and Propagation, Vol. 69, No. 9, pp. 5365-5376, Sept. 2021.
Ehrenborg, C., Gustafsson, M., Capek, M.: Capacity Bounds and Degrees of Freedom for MIMO Antennas Constrained by Q-Factor, IEEE Transactions on Antennas and Propagation, Vol. 69, No. 9, pp. 5388-5400, Apr. 2021.
Capek, M., Jelinek, L., Masek, M.: Finding Optimal Total Active Reflection Coefficient and Realized Gain for Multi-port Lossy Antennas, IEEE Transactions on Antennas and Propagation, Vol. 69, No. 5, pp. 2481-2493, Oct. 2020.
Gustafsson, M., Schab, K., Jelinek, L., Capek, M.: Upper Bounds on Absorption and Scattering, New Journal of Physics, Vol. 22, pp. 1-25, Jul. 2020.
Masek, M., Capek, C., Jelinek, L., Schab, K.: Modal Tracking Based on Group Theory, IEEE Transactions on Antennas and Propagation, Vol. 68, No. 2, pp. 927-937, Feb. 2020.
Gustafsson, M., Capek, M.: Maximum Gain, Effective Area, and Directivity, IEEE Transactions on Antennas and Propagation, Vol. 67, No. 8, pp. 5282-5293, Aug. 2019.
Capek, M., Jelinek, L., Schab, K., Gustafsson, M., Jonsson, L., Ferrero, F., Ehrenborg, C.: Optimal Planar Electric Dipole Antennas, IEEE Antennas and Propagation Magazine, pp. 1-10, 2019.
Capek, M., Jelinek, L., Gustafsson, M.: Inversion-Free Evaluation of Nearest Neighbors in Method of Moments, IEEE Antennas and Wireless Propagation Letters, pp. 1-5, 2019.
Capek, M., Jelinek, L., Gustafsson, M.: Shape Synthesis Based on Topology Sensitivity, IEEE Transactions on Antennas and Propagation, Vol. 67, No. 6, pp. 3889-3901, June 2019.
Gustafsson, M., Capek, M., Schab, K.: Tradeoff Between Antenna Efficiency and Q-Factor, IEEE Transactions on Antennas and Propagation, Vol. 67, No. 4, pp. 2482-2493, April 2019.
Tayli, D., Capek, M., Akrou, L., Losenicky, V., Jelinek, L., Gustafsson, M.: Accurate and Efficient Evaluation of Characteristic Modes, IEEE Transactions on Antennas and Propagation, Vol. 66, No. 12, pp. 7066-7075, Dec. 2018.
Jelinek, L., Schab, K., Capek, M.: The Radiation Efficiency Cost of Resonance Tuning, IEEE Transactions on Antennas and Propagation, Vol. 66, No. 12, pp. 6716-6723, Dec. 2018.
Losenicky, V., Jelinek, L., Capek, M., M. Gustafsson: Dissipation Factors of Spherical Current Modes on Multiple Spherical Layers, IEEE Transactions on Antennas and Propagation, Vol. 66, No. 9, pp. 4948-4952, Sept. 2018.
Capek, M., Hazdra, P., Adler, V., Kadlec, V., Sedenka, V., Marek, M., Masek, M., Losenicky, V., Strambach, M., Mazanek, M., Rymus, J.: AToM: A Versatile MATLAB Tool for Antenna Synthesis, EuCAP 2018, London, UK, 2018.
Capek, M., Tayli, D., Akrou, L., Losenicky, V., Jelinek, L., Gustafsson, M.: Accurate Evaluation of Characteristic Modes, EuCAP 2018, London, UK, 2018.
Chen, Y., Schab, K., Capek, M., Masek, M., Lau, B. K., Aliakbariabar, H., Haykir, Y., Wu, Q., Strydom, W., Peitzmeier, N., Jovicic, M., Genovesi, S., Dicandia, F. A.: Benchmark Problem Definition and Cross-Validation for Characteristic Mode Solvers, EuCAP 2018, London, UK, 2018.
Capek, M., Jelinek, L.: Optimal Currents and Optimal Antennas, EuCAP 2018, London, UK, 2018.
Masek, M., Capek, M., Jelinek, J.: Mode Tracking Based on Group Theory, EuCAP 2018, London, UK, 2018.
Capek, M., Gustafsson, M., Schab, K.: Minimization of Antenna Quality Factor, IEEE Transactions on Antennas and Propagation, Vol. 65, No. 8, pp. 4115-4123, Aug. 2017.
Capek, M., Losenicky, V., Jelinek, L., Gustafsson M.: Validating the Characteristic Modes Solvers, IEEE Transactions on Antennas and Propagation, Vol. 65, No. 8, pp. 4134--4145, Aug. 2017.
Gustafsson, M., Capek, M., Schab, K.: Fundamental Limitations on the Quality Factor and Related Problems for Small Antennas, IEEE APS/USNC-URSI, San Diego, USA, 2017.
Capek, M., Losenicky, V., Jelinek, L., Gustafsson, M., Tayli, D.: Numerical Benchmark Based on Characteristic Modes of a Spherical Shell, IEEE APS/USNC-URSI, San Diego, USA, 2017.
Jelinek, L., Kratky, O., Capek, M.: Polarizability Tensors of Highly Conductive Bodies, IEEE APS/USNC-URSI, San Diego, USA, 2017.
Jelinek, L., Kratky, O., Capek, M.: An Evaluation of Polarizability Tensors of Arbitrarily Shaped Highly Conducting Bodies, IET Microwaves, Antennas and Propagation, Vol. 11, No. 6, pp. 852-858, May 2017.
Gustafsson, M., Capek, M., Schab, K.: Minimum Q-factors for Antennas, EuCAP 2017, Paris, France, 2017.
Capek, M., Jelinek, L., Kadlec, P., Strambach, M.: Excitation of Optimal and Suboptimal Currents, EuCAP 2017, Paris, France, 2017.
Capek, M., Hazdra, P., Masek, M., Losenicky, V.: Analytical Representation of Characteristic Modes Decomposition, IEEE Transactions on Antennas and Propagation, Vol. 65, No. 2, pp. 713-720, Feb. 2017.
Jelinek, L., Capek, M.: Optimal Currents in the Characteristic Modes Basis, IEEE APS/USNC-URSI, Fajardo, Puerto Rico, 2016.
Capek, M., Jelinek, L.: Optimal Composition of Modal Currents For Minimal Quality Factor Q, IEEE Transactions on Antennas and Propagation, Vol. 64, No. 12, pp. 5230-5242, Dec. 2016.
Capek, M., Masek, M., Hazdra, P.: Some Numerical Aspects of Characteristic Mode Decomposition, EuCAP 2016, Davos, Switzerland, 2016.
Capek, M., Hazdra, P., Mazanek, M., Raida, Z., Rymus, J.: The Antenna Toolbox for Matlab (AToM), EuCAP 2015, Lisbon, Portugal, 2015.
Capek, M., Eichler, J., Hazdra, P., Mazanek, M.: A Method for the Evaluation of Radiation Efficiency Based on Modal Approach, EuCAP 2014, Hague, Netherlands, 2014.
Kozak, F., Capek, M., Jenik, V., Hudec, P., Skvor, Z.: Simulation of Electromagnetic Field of a Fast Moving Target Close to Antennas, EuCAP 2013, Gothenburg, Sweden, 2013.