User Manual

USER MANUAL V1.05
© 2013 EnOcean | www.enocean.com STM 330 / STM 331 / STM 330C / STM 332U / STM 333U User Manual V1.10 | Page 24/33
STM 330 / STM 331 / STM 330C / STM 332U / STM 333U
4.5 Antenna layout
4.5.1 Whip antenna (STM 330 / STM 330C / STM 332U)
Specification of the whip antenna; L=150 mm @ 315 MHz, L=86 mm @ 868 MHz,
L=64mm @ 902.875MHz
Antenna layout recommendation:
STM 330 without host PCB STM 330 with host PCB
Glass, wood, concrete, metal
868/902 MHz: > 2 cm
315 MHz: > 4 cm
868/902 MHz: > 1 cm
315 MHz: > 2 cm
868/902 MHz: > 2 cm
315 MHz: > 4 cm
Host PCB
GND plane