BM63 datasheet(34/56 Pages) MICROCHIP

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BM63

DS60001431A-Page 34

Advance Information

 2016 Microchip Technology Inc.

FIGURE 6-2:

PCB ANTENNA RADIATION PATTERN

6.2

Module Placement Guidelines

For Bluetooth-enabled products, the antenna placement

affects the overall performance of the system. The

antenna requires free space to radiate RF signals and it

should not be surrounded by the ground plane. Microchip

recommends that the areas underneath the antenna on

the host PCB must not contain copper on the top, inner, or

bottom layers, as illustrated in Figure 6-1.

A low-impedance ground plane will ensure the best radio

performance (best range, lowest noise). The ground

plane can be extended beyond the minimum recommen-

dation as required for the main PCB EMC noise reduction.

For the best range performance, keep all external metal at

least 15 mm away from the on-board PCB trace antenna.

Figure 6-3 and Figure 6-4 illustrate the good and poor

placement of the BM63 module on a host board with GND

plane.

TABLE 6-1:

PCB ANTENNA

CHARACTERISTICS

Parameter

Values

Frequency

2400 MHz ~ 2480 MHz

Peak Gain

1.927 dBi

Efficiency

73.41%

BM63 Datasheet(PDF) 34 Page - Microchip Technology