Hangzhou Tuya Inc.
NM1 Module Hardware Design Manual
https://www.tuya.com
Page 10 of 29
Table 2- 3 Line loss requirements
Frequency Band
Requirement
LTE B5, B8, B20
Line loss < 1 dB
LTE B1, B3
Line loss < 1.5 dB
Table 2- 4 Antenna requirements
Item
Requirement
Frequency band
LTE B1, B3, B5,B8, B20
Standing wave ratio (SWR)
≤ 2
Efficiency (%)
≥ 30
Maximum input power (W)
50
Input impedance (ohm)
50
Polarization type
Linear polarization
Note: The NM1 module is being developed to support the frequency bands with an asterisk (*).
Table 2- 5 Conducted RF transmit power
Frequency Band
Maximum Value (dBm)
Minimum Value (dBm)
B1
23±2 dBm
< –39
B3
23±2 dBm
< –39
B5
23±2 dBm
< –39
B8
23±2 dBm
< –39
B20
23±2 dBm
< –39
Note:
1. The designed conducted RF transmit power complies with the NB-IoT protocol in 3GPP Release 13 and Release 14.
2. The NM1 module is being developed to support the frequency bands with an asterisk (*).
