User's Manual

19.4 Footprint

18,0

24,0

1,0

2,0 4,0

2,0

22,0 1,5

4,0

2,2

6,0

Figure 20: Footprint and dimensions [mm]

The following points have to be considered:

• To avoid the risk of short circuits, a minimum clearance of at least 14 mm between the

opposing pad rows has to be maintained! No routing on the top layer of a carrier PCB

(i.e. "under" the module) shall be performed.

• For the module variant with integrated antenna the marked corner area of 7.3 x 13.8 m-

m has to be kept free from metal, on any layer.

• The four bottom side pads are optionally for the ﬁrmware update using JTAG can be

left open when JTAG update is not needed in the customer’s application.

• This footprint is also compatible to the radio modules Tarvos-I, Tarvos-II, Thadeus and

Titania.

19.5 Antenna free area

To avoid inﬂuence and mismatching of the antenna the recommended free area around the

antenna should be maintained. As rule of thumb a minimum distance of metal parts to the

antenna of λ/10 should be kept (see ﬁgure

). Even though metal parts would inﬂuence

the characteristic of the antenna, but the direct inﬂuence and matching keep an acceptable

level.