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BM62 Scheda tecnica(PDF) 40 Page - Microchip Technology

Il numero della parte BM62
Spiegazioni elettronici  Bluetooth짰 4.2 Stereo Audio Module
PDF  70 Pages
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

BM62 Scheda tecnica(HTML) 40 Page - Microchip Technology

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BM62/64
DS60001403A - Page 40
 2016 Microchip Technology Inc.
FIGURE 6-2:
ANTENNA 3D RADIATION PATTERN AT 2441 MHZ
6.2
Module Placement Guidelines
For a Bluetooth product, the antenna placement
affects the performance of the whole system. The antenna
requires free space to radiate RF signals and it cannot be
surrounded by the ground plane. Microchip recommends
that the areas underneath the antenna on the host PCB
must not contain copper on top, inner, or bottom layer 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 reduc-
tion. 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 examples of good
and poor placement of the BM62/64 module on a host
board with GND plane.
TABLE 6-1:
BM62/64 ANTENNA
CHARACTERISTICS
Parameter
Values
Frequency
2400 MHz ~ 2480 MHz
Peak Gain
1.927 dBi
Efficiency
73.41%



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