BM78 Datasheet, PDF (39/60 Pages) Microchip Technology – Bluetooth® 4.2 Dual-Mode Module

BM78
Figure 6-3 illustrates the recommendations for mount-
ing the BM78SPPS5MC2/NC2 on the host PCB, and it
also shows the minimum ground plane area to the left
and right of the module for the best antenna perfor-
mance.
Avoid top copper layer near the test pin area. When
designing the host PCB, the areas under the antenna
should not contain any top, inner, or bottom copper
layer. A low-impedance ground plane will ensure best
radio performance (best range and lowest noise). The
ground plane can be extended beyond the minimum
recommended as needed for host PCB EMC noise
reduction. For best range performance, keep all exter-
nal metal at least 31 mm away from the ceramic chip
antenna.
FIGURE 6-3:
BM78SPPS5MC2/NC2 HOST PCB MOUNTING SUGGESTION
 2016 Microchip Technology Inc.
Advance Information
DS60001380A-Page 39