Fault Detection of Microwave Components using Direct Display Field Representation Microwave Thermography

This contribution handles a method for the direct display of electromagnetic fields on an indicator cell. For this, the phenomenon of thermochromism is used to visualize the resulting thermal footprint caused by an incident electromagnetic wave. Fundamentals regarding the transient dielectric heating behavior as well as the indicator cell design are shown. Simulations and measurements that verify the applicability of fault detection by investigating a defected
$2\times 2$
patch array antenna, are presented and discussed in detail.