CLM920_NC3_LTE Module Hardware User Guide
Shang Hai YUGE Information Technology co., LTD
Page 24 of 37
3.10.2 RF Connector Size
Customers are advised to use the RF Connector connection method.
The antenna connector must use a coaxial connector with a 50 ohm characteristic impedance and
use an RF cable with as little insertion loss as possible.
Murata's MM9329-2700 connector is recommended.
Figure 3-18 RF connector size chart
Table 3-4 Main parameters of the RF connector
Rated condition
Environmental conditions
Frequency Range
DC to 6GHZ
–
40
°
C to +85
°
C
Characteristic impedance
50
Ω
–
40
°
C to +85
°
C
Figure 3-19 Matching coaxial RF line size
The CLM920_NC5 Mini PCIE module provides three RF antenna interfaces, which are the main set
antenna, diversity antenna and GPS antenna (optional). Connected to the antenna must be a 50 ohm
characteristic impedance trace.
In actual use, the antenna board can be debugged and optimized according to the user's circuit board.
The motherboard R1/R2/R3/R4 defaults to 0 ohms, and C1/C2/C3/C4 defaults to empty. During the
internal period, it is recommended to attach a bidirectional TVS tube at the antenna connection