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Vivaldi antenna

Problem Description

The simulation of broadband antenna designs can be very time consuming because of the complexity of the antenna geometries and the time it takes to simulate each frequency point of interest. Axial ratio, input impedance and gain typically have to be characterised and optimised for maximal bandwidth, creating the necessity for a tool that can perform these functions in simulation before expensive prototypes are built.

FEKO Solution

FEKO is ideally suited to this application and includes the following features that may be applied to these problems:

• Method of Moments (MoM) based simulation engine that discretises only model elements where currents flow.
• A full-featured CAD GUI for easy construction or importing of complex antenna geometries and specification of solution requirements.
• A built-in optimiser for the optimisation of antenna characteristics over several goal functions.
• Adaptive Frequency Sampling (AFS) for the adaptive scanning of wide frequency bands, thereby limiting the number of frequency points that have to be simulated, while still accurately characterising model performance.