Metal reflectivity investigation at 110-200 GHz

Reflectivity investigations were directed at high reflection metals like silver, copper, gold and aluminium to get mirrors with minimum possible reflection losses and on real metals and alloys which are widely used in high power electronics like stainless steel, titanium, brass and so on. The mm-wave range is a specific range because just in this range the skin-layer of metals may be higher as well as lower than the value of roughness for the main types of mechanical treatment. So it is expected that there must be a strong dependence of the reflection losses versus the roughness. This was confirmed by the experimental results.