ZED-F9T - Integration Manual
Figure 33: ZED-F9T reference design for antenna bias
L1: MURATA LQW15A LQW15ANR12J00 0402 120N 5% 0.11A -55/+125C
D1: TYCO, 0.25PF, PESD0402-140 -55/+125C
C2: MURATA GRM0335C1H470JA01 47pF ±5% 50Vdc C0G(EIA) 0±30ppm -55 to 125C
C3: MURATA GRM155R61A104KA01 CER X5R 0402 100N 10% 10V
R2: RES THICK FILM CHIP 1206 10R 5% 0.25W
It is recommended to use active current limiting. If active current limiting is not used, the following
important points covered below need to be taken into account:
Figure 34: ZED-F9T VCC_RF antenna bias
The bias-t inductor and current limiting resistor must be selected to be reliable with a short
on the antenna feed if no active current limiter is used. Our recommended part has a limit of
110 mA, a part with a higher current capability will be needed if the short circuit current is
UBX-19005590 - R01
4 Design
Page 63 of 80
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