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Create fractal Koch snowflake antenna

The `fractalSnowflake`

object creates a Koch snowflake
fractal antenna. These fractal antennas are used in mobile phone, Wi-Fi^{®}, and radar applications.

A fractal antenna uses a fractal, a self-similar design that is repeated in different dimensions so as to maximize effective the length or increase the perimeter of the material that transmits or receives electromagnetic radiation. This makes the fractal antennas compact and therefore suitable for use in small and complex circuits. Fractal antennas also have higher input impedance or resistance due to their length or increased perimeter.

All fractal antennas are printed structures that are etched on a dielectric substrate.

creates a
Koch’s snowflake fractal antenna. The default fractal is centered at the
origin, and the number of iterations is set to 2. The length of the fractal
is for an operating frequency of 4.15 GHz.`ant`

= fractalSnowflake

sets properties using one or more name-value pairs. For example,
`ant`

= fractalSnowflake(Name,Value)`ant = fractalSnowflake('Numiterations',4)`

creates a
Koch's snowflake with four iterations.

`show` | Display antenna or array structure; display shape as filled patch |

`impedance` | Input impedance of antenna; scan impedance of array |

`sparameters` | S-parameter object |

`returnLoss` | Return loss of antenna; scan return loss of array |

`vswr` | Voltage standing wave ratio of antenna |

`optimize` | Optimize antenna or array using SADEA optimizer |

`pattern` | Radiation pattern and phase of antenna or array; Embedded pattern of antenna element in array |

`patternAzimuth` | Azimuth pattern of antenna or array |

`patternElevation` | Elevation pattern of antenna or array |

`axialRatio` | Axial ratio of antenna |

`beamwidth` | Beamwidth of antenna |

`current` | Current distribution on metal or dielectric antenna or array surface |

`charge` | Charge distribution on metal or dielectric antenna or array surface |

`efficiency` | Radiation efficiency of antenna |

`EHfields` | Electric and magnetic fields of antennas; Embedded electric and magnetic fields of antenna element in arrays |

`mesh` | Mesh properties of metal or dielectric antenna or array structure |

`design` | Design prototype antenna or arrays for resonance at specified frequency |