Rf Antenna Interface - Quectel BC68 Manual

4.9. RF Antenna Interface

RF_ANT and BT_ANT of M66 are compatible to RF_ANT of BC68. The RF antenna interface has an
impedance of 50Ω. A reference circuit for the interface is shown below. In order to achieve better RF
performance, a π-type matching circuit should be reserved, and
(R1/C1/C2) should be placed as close the antenna as
capacitors C1 and C2 are not mounted.
BC68&M66_Compatible_Design
Module
M66 BT_ANT
BC68/M66 RF_ANT
Figure 14: Reference Circuit of RF Interface
GSM/GPRS/NB-IoT Module Series
BC68&M66 Compatible Design
the π-type
possible. By default, the resistance of R1 is 0Ω and
R1 0R
C1
C2
NM NM
matching components
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