[https://interferencetechnology.com/antenna-fundamentals/](https://interferencetechnology.com/antenna-fundamentals/)

  

[https://home.zhaw.ch/kunr/NTM1/literatur/Rhode_Schwarz_Antenna_Basics.pdf](https://home.zhaw.ch/kunr/NTM1/literatur/Rhode_Schwarz_Antenna_Basics.pdf)