Data Sheet

Bluegiga – A Silicon Labs Company 19
6.2 Effect on antenna matching of a metal sheet placed under the antenna
As an example on how a metal sheet placed in the vicinity of the module and/or antenna effect the antenna
matching we can examine Figure 9 below.
Figure 9 Effect of a metal sheet placed under the antenna on antenna matching
Violet curve
Metal sheet under antenna touching PCB
Blue curve
Same as on the left but distance is 1 mm