Category - Validation

Explore the Conformal Method of Moments (CMoM) and the exact kernel formulation behind the AN-SOF engine. Learn how curved segment modeling eliminates the accuracy issues and numerical singularities found in legacy MoM codes, enabling high-precision simulations from 60 Hz to microwave frequencies.

Understand the core mathematics of antenna simulation. This article explains the Electric Field Integral Equation (EFIE), the transition from surface to wire modeling, and why parametric geometry combined with an exact kernel is essential for accurate results in curved wire structures.

Learn why the Exact Kernel is superior to the common thin-wire approximation. This article explains how AN-SOF avoids non-physical current oscillations and input impedance divergence, ensuring stable, convergent results even when using high-density segmentation for thick wire structures.

Discover how the Method of Moments (MoM) converts complex integral equations into solvable linear algebra. This article breaks down the use of triangular basis functions, pulse testing, and the impedance matrix, explaining how AN-SOF uses these techniques to calculate precise current distributions.

Learn how AN-SOF models electromagnetic excitation through discrete voltage sources and incident plane waves. This article explains the critical differences between delta-gap and finite-gap feed models and details the mathematical integration used to simulate how external fields induce current across wire segments.

Compare the convergence and stability of curved vs. straight segments in antenna modeling. Using a helical antenna benchmark, this article demonstrates how AN-SOF’s curved segments provide faster, more stable results for resistance, reactance, and admittance while using significantly fewer computational resources.

This article validates AN-SOF’s results against the IEC FDIS 62232 standard by replicating an RBS panel antenna model with nine dipole radiators. The successful validation highlights AN-SOF’s ability to deliver highly accurate results, even with relatively simple models.

Discover the vital role of historical theoretical results alongside advanced numerical calculations in accurately approximating current distribution on linear antennas.

Discover the perfect balance: a simple dual-band vertical dipole, AN-SOF modeling, and real-world results. Elevate your ham radio experience.

This article validates AN-SOF's results against established formulas for V antennas, highlighting its advanced modeling capabilities. We explore optimal angles, directivity enhancements, and precise calculations, making AN-SOF a powerful tool for RF engineers, ham radio enthusiasts, and antenna designers.

This article presents a comprehensive comparison between AN-SOF's dipole antenna simulations and the renowned King-Middleton second-order solution. Through rigorous analysis and numerical experiments, we validate the accuracy and reliability of AN-SOF in predicting dipole antenna input impedance.

Verify the numerical precision of the AN-SOF engine through this detailed validation study of cylindrical dipoles. By testing the principle of energy conservation, comparing input resistance against far-field radiation resistance, we demonstrate a near-perfect correlation with errors below 0.035%. This article also explores gain convergence, establishing that 10 segments per wavelength are sufficient to achieve high-precision results for linear antenna modeling.

Examine the numerical stability of cylindrical dipole modeling through this rigorous convergence study. By analyzing input impedance as a function of discretization density and length-to-radius ratios, this article demonstrates how AN-SOF overcomes the traditional divergence issues found in many MoM codes, such as NEC-2. While older engines often fail to provide convergent reactance values when using a delta-gap source with fine segments, AN-SOF's exact kernel ensures monotonic stability. Validation against the classical 73.1 + j 42.5 Ohm half-wave dipole thin-wire limit and convergence analysis confirm the engine's precision for both resonant and anti-resonant linear antennas.

Explore the enhanced methodology for modeling LF/MF monopoles over radial wire ground screens. Learn how AN-SOF integrates Poynting’s theorem with the Exact Kernel to provide precise resistance and reactance calculations, validated against Professor James R. Wait’s classical analytical results. Essential for broadcast engineers seeking high-precision radiation efficiency and impedance matching data.

Validate the precision of the Conformal Method of Moments (CMoM) through this rigorous study of small loop antennas. By comparing simulated circular and square loops against classical asymptotic theory, we demonstrate how AN-SOF accurately models radiation resistance and directivity in the low-frequency limit, where antenna size is a tiny fraction of a wavelength. This article provides essential insights into shape-independence and numerical stability for electrically small radiator design.

Moving beyond the uniform-current simplifications of small antennas, this article analyzes the electromagnetic behavior of electrically large circular loops. By benchmarking AN-SOF numerical results against classical Fourier theory, we explore how loop circumference and wire thickness influence non-uniform current distributions, parallel/series resonances, and axial directivity. This detailed study validates the accuracy of CMoM for curved radiators.

Validate the electromagnetic behavior of the helical antenna in its Normal Mode through this detailed study referencing the foundational work of John D. Kraus. By analyzing the transition from a 3D helical structure to its theoretical loop-dipole equivalent, this article demonstrates how AN-SOF accurately captures the broadside radiation pattern and the asymptotic gain limit. Essential reading for engineers and designers modeling compact curved radiators and electrically small antennas.

AN-SOF simulations of axial-mode helical antennas closely match John D. Kraus’s classic measurements for gain and VSWR, confirming its accuracy. Using the Conformal Method of Moments, AN-SOF models true helix curvature, delivering reliable predictions for high-gain circularly polarized designs.