USER MANUAL V1.2
© 2014 EnOcean | www.enocean.com
TCM 310 / TCM 310C / TCM 310U User Manual | v1.2 | July 2014 | Page 15/28
TCM 310 / TCM 310C / TCM 310U
4.2.4
Chip antenna (supplier: Mitsubishi Material, Type AM11DG-ST01)
315 MHz
Modular approval not available. Range and gain significantly reduced because of antenna
size vs. the wavelength. Small chip antennas at this frequency may be suited for space-
constrained applications. Check with supplier for matching circuit and board design guide-
lines. Supplier can make recommendations or do testing to optimize individual PCB design.
868.3 MHz
Additional matching circuit and proper board design is required.
Check with supplier for matching circuit and board design guidelines.
Connect matching circuit to RF_50 using 50 Ohm strip lines. Please follow 902 MHz board
design recommendations and dimensions. Be aware that matching values differ!
902.875 MHz
Limited modular approval is available. Please contact EnOcean to sign the mandatory lim-
ited modular approval user agreement. Dimensions may not be shortened. Matching circuit
is part of the limited modular approval and may not be changed. Minimum top and bottom
side ground plane required as shown below. Connect ground planes using multiple via as
shown. Connect matching circuit to RF_50. Use High Q wire wound inductors, e.g. 0603
Murata LQW18A series. Matching circuits values: L1 = 3.9 nH; L2 = 33 nH, L3 = 12 nH.
This antenna evaluation board is available upon request for use with EnOcean EDK 350 de-
veloper kit.
For any further questions or chip antenna quotes, please refer to Mitsubishi Materials web-
site at
www.mmea.com
or email to
.