Material Properties

Radar waves propagate freely in a vacuum. When the waves hit an object, the signal changes due to the influence of the object's properties. Depending on the materials, the radar waves are completely or partially absorbed or reflected. There is also a penetration of various substances. Absorbing materials are generally poorer radar targets. They also generate a certain amount of reflection at the boundary layers due to the so-called matter jump. However, the vast majority of the radar wave is usually absorbed, which makes reliable measurements on these targets more difficult.

Material	Absorption	Reflection	Transmission
Metal	None	Total reflection at straight incidence, refraction, and partial reflection possible at oblique incidence	None
Wood	Medium to high (Depending on the humidity)	Low	Low
Water	Very high	Depending on the angle of incidence, partial or total reflection possible	Low
Foams	Low	Low	Very low
Plastics	Low to high (Depending on the thickness and type of plastic)	Low to high (Depending on the thickness and type of plastic)	Low to high (Depending on the thickness and type of plastic)
Glass	Low to high (Depending on the thickness of the glass)	Low to high (Depending on the thickness of the glass)	Low to high (Depending on the thicknessof the glass)
Clothing	Medium to high (Depending on the humidity)	Low	Low
Rain	Low	Low	Very high
People	Medium	Medium	Low
Ice	Very high	Depending on the angle of incidence, partial or total reflection possible	None, due to absorption

Handling Material Properties with Industrial Radar Sensors

Learn More about Radar Technology

e-news

ニュースレターを購読すると、オートメーションの世界に関するニュースや興味深い情報を定期的に受け取ることができます。

当社のオンラインマガジンをチェックしてください！成功ストーリーやアプリケーションレポート、インタビュー、地域ニュースが待っています。

Defying Elements

Pepperl+Fuchs industrial radar sensors offer you interference-free distance and velocity measurement—even in rain, fog, wind, or dust. Learn more about this unique sensory operating principle and all the advantages it opens up for you.

製品