Layout specification

AN3359

6/28

Doc ID 018585 Rev 1

2

Layout specification

PCB antennas, including the electrical parameters of PCB materials used, are layout

sensitive. STMicroelectronics recommends using a layout as close as possible to that

shown in Figure 2.

Figure 2.

Layout of Meander-like PCB antennae

The electrical parameters and performance of the PCB antenna are also determined by the

substrate used, in particular the thickness of the core and dielectric constants

.

Figure 3 illustrates a typical cross-section of the substrate in a PCB-antennae area.

ε

R