CST2013 MWS Examples: Yagi Antenna

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General Description

This example presents the calculation of a Yagi antenna, consisting of six elements, one reflector, four directors and one driven element.

Structure Generation

The input of the geometry is done parametrically referred to a wavelength of 10 mm. To obtain a flexible structure, each antenna element has its own parameters and thus is created separately as a very thin cylinder consisting of PEC material. To provide some space for the location of the excitation source a small gap is cut afterwards in the antenna which is used as the driven element.

Solver Setup

In order to enable a calculation one discrete port is defined as the excitation source, feeding the driven element as an electric dipole antenna. Before starting the simulation a farfield monitor is set at the respective frequency.

Post Processing

The previously defined farfield monitor offers now the possibility to investigate the radiation characteristics of the complete structure. The farfield results are listed in the folder Farfields and can be visualized in different ways. Here the directivity in linear scaling is shown.

Changing the dimensions and spacings of the elements the influence concerning the farfield properties can be examined.