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User Manual May 2019 | Page 16/28
USER MANUAL
Energy Harvesting Magnet Contact Transmitter Module
STM 320 / STM 329 / STM 320U
(Stepcode DE and later)
4
APPLICATIONS INFORMATION
4.1
Helical antenna
868 MHz / 902 MHz
Antenna recommendation:
STM 320 without host PCB STM 320 with host PCB
Hos
t P
C
B
G
N
D
plane
Glass, wood, concrete, metal
868/902 MHz: > 2 mm
315 MHz: > 4 mm
868/902 MHz: > 5 mm
315 MHz: > 10 mm
Pl
as
ti
c
