USER MANUAL
TCM 515Z – 2.4 GHZ IEEE 802.15.4 Transceiver
© 2017 EnOcean | www.enocean.com
F-710-017, V1.0
TCM 515Z User Manual | v1.6 | September 2017 | Page 16/46
Table 5 below lists the parameters of the components which have to be used for the pi low
pass filter.
Designator Value Notes
C1
1.0pF use Murata GRM1555 series or similar
C2
1.0pF use Murata GRM1555 series or similar
L1
3.1nH use Murata LQP15MN series or similar
Table 5 – Values of the pi low pass filter for the dipole antenna
The transmission line between TCM 515Z and the antenna has to be implemented as shown
in Figure 8 below.
w=1.00mm
s=0.15mm
h=0.90…2.00mm (See
Note 1)
Typical line impedance
on FR4=44…56Ω
Return loss>=24dB
Figure 8 – Detailed description of RF transmission line
Note (1): Coplanar waveguide modes are dominant in this configuration. Thus thickness of
substrate can be changed with the given limits.