FN990
Family Hardware Design Guide
1VV0301752 Rev. 3 Page 62 of 92 2022-10-07
Not Sub
ect to NDA
Antenna Requirements
Antennas for FN990 Family modules must meet the requirements listed in the table
below.
WCDMA/LTE/5G Sub-6 Antenna Requirements
Item Value
Frequency range
Depending on the frequency band(s) provided by the network operator, the
customer must use the most suitable antenna for that/those band(s).
The bands supported by the FN990 Family is provided in Section 2.2
Frequency Bands and CA / EN-DC Combinations
Impedance 50 Ohm
Input power > 24 dBm average power in WCDMA & LTE & 5G Sub-6
VSWR absolute max <= 10:1
VSWR recommended <= 2:1
Table 40: WCDMA / LTE / 5G Sub-6 Antenna Requirements
7.3.1. Antenna Cable
Connecting cables between the module and LTE/Sub-6 antenna must have 50 Ohm
impedance.
If the impedance of the module does not match, RF performance is significantly reduced.
Item Value
Impedance 50 Ohm
Max cable loss Less than 0.5 dB
Avoid coupling with other signals.
Table 413: Minimize Antenna Cable Recommendations
Warning: Impedance of antenna connector and RF cable must be
matched to 50 Ohm: mismatch will affect RF performance, especially
high insertion loss of RF cable will cause Tx power and Rx sensitivity
degradation.
Warning: The FN990 should be located away from noise sources: RF
cables and antennas should be installed away from noise sources
such as SMPS, USB/PCIe interfaces, etc.
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