It is also important to properly orient the anchor vertically. In most cases, it should be tilted down to the ground. The angle of the tilt depends on the anchor’s height and the dimensions of the location cell.
Consider the following scenario. The anchors are placed 6 meters high and are oriented towards each other diagonally. Now they need to be tilted towards the surface where the tags are located so the signal covers the location area. The anchor should be pointed to the surface below the opposite anchor. The tilt is approximately 10.6 degrees from the wall. Of course, the higher the anchors are mounted the more the anchors need to be tilted and vice versa.
A similar situation is shown in 3D picture. The green rectangles are anchors (SYNC Layer) and the blue rectangle at the bottom is the surface where the tags are moving (tag movement level) and the 3D diagonal is visualized using pink color. Again, the anchor is pointed just below the other anchor in the opposite direction diagonally.
When the anchor is tilted to its maximum, the signal might not reach the opposite anchor and this could disrupt the synchronization of the anchors. On the other hand, tilting the anchors too little may cause that the main lobe of the signal will be pointed towards the opposite wall rather than the location area.