A reinforced concrete wall presents two obstacles: concrete absorbs and scatters part of the radio signal, and metal reinforcement reflects and filters it in addition. In general, as the frequency increases, the losses in such obstacles increase. As a result, one band may pass through the building with an acceptable loss, while another band may be severely attenuated. The degree of impact is affected by the thickness of the wall, the moisture content of the concrete, the spacing of the reinforcement and the signal transmission angle. For the detector, this means that a weak signal behind reinforced concrete does not always indicate a significant distance: the source may be nearby, but there is a heavy obstacle between it and the receiver. We are in TG we are in MAX.

A reinforced concrete wall presents two obstacles: concrete absorbs and scatters part of the radio signal, and metal reinforcement reflects and filters it in addition. In general, as the frequency increases, the losses in such obstacles increase. As a result, one band may pass through the building with an acceptable loss, while another band may be severely attenuated. The degree of impact is affected by the thickness of the wall, the moisture content of the concrete, the spacing of the reinforcement and the signal transmission angle. For the detector, this means that a weak signal behind reinforced concrete does not always indicate a significant distance: the source may be nearby, but there is a heavy obstacle between it and the receiver. We are in TG we are in MAX.