EMCoS Antenna Vlab

Computational Technique

The calculation core of EMCoS Antenna VirtualLab is TriD solver. This Method of Moment (MoM) based module offers accurate results with an extremely fast out-of-core solver for the resulting equation system.
TriD is the integrated solver for the smart analysis of electromagnetic response of complicated structures placed in free space or above a ground plane. Metallic structures consisting of arbitrary shape wires and surface antennas (PEC or metal-dielectric) are handled in TriD. The program allows finite conductivity of wire segments by specifying their resistance, inductance and capacitance. Different types of excitation sources are available in TriD including incident plane wave, voltage source over a wire segment, current sources, impressed currents, electric and magnetic dipoles as well as any arbitrary combination of sources.
The core of TriD is based on the Method of Moments (MoM) to numerically solve the Electric Field Integral Equations (EFIE) for the induced electric currents on wires and surfaces. Triangular basis functions for the surface and segment currents and special basis functions for the junction currents have been developed into TriD to calculate the induced electric currents on the whole structure.
With a well equipped modern PC, solution of problems with 40.000 unknowns and more can be done. TriD automatically chooses the best solver without user interaction. With the inverted equation system both the current and charge distributions on the whole structure are available, and the desired characteristics of the structure are calculated both in near and far field. Special calculation features aiding antenna calculations are implemented.
The out-of-core and parallel solvers allow the calculation of very large problems.

Special calculation techniques are supported:

  • Matrix Partitioning for extremely fast and accurate optimization calculations

A partitioned MoM scheme is intended to effectively handle series of geometries having a predominant common part. This scheme is based on a partitioned calculation and inversion of unvarying (basis) and differing (additional) parts of impedance matrices to quickly obtain solutions to EM problems on a series of geometries.

  • Physical Optics (PO) calculation core for very high frequencies

This solution allows reducing computational time and memory for electrically large type of problems.

  • Frequency an
    Convenient solution for investigation of input parameters and interactions in multi-port systems (EMCoS Antenna VirtualLab stores N port simulation results in Touchstone format)
    d Time Domain analysis
  • Error Estimation functions for model improvement
  • Adaptive Frequency Sampling (AFS) for fast frequency sweeps

The method for obtaining correct frequency sweep with minimum number of frequency points based on construction of rational fitting polynom. This approach results in much faster calculatio n of frequency characteristics of antennas

  • N Port solution technique for S, Y, Z matrices analysis
  • Fast and accurate out-of-core equations system solvers
  • Powerful antenna calculation and optimization functions

Various antenna parameters including current, impedance and power characteristics, antenna gain and efficiency. Convenient post-processing tools are effective for further antenna analysis and optimization