RYZ012

R12DS0002EU0101 Rev.1.01

Page 15 of 24

May.05.22

Antenna Trace Design

The antenna trace connecting the modules RF pad with the antenna connector must be designed to have 50

Ohms impedance. The impedance of the trace depends on different parameters such as the dielectric

constant, trace width and height and distances to ground planes. The integrator should use a calculator such

as AWR TXLine to compute the exact geometry of the antenna trace. The picture below shows an exemplary

configuration for a Coplanar Wave Gu

ide antenna trace with εr = 4.7 and 1 mm substrate height.

Figure 10. AWR TXLine Tool for Antenna Trace Impedance Calculation

Antennas

RYZ012A1

The RYZ012A1 has an integrated antenna. The host integrator should follow the instructions from to ensure

best antenna performance.

RYZ012B1

The RYZ012B1 does not have an own antenna, but comes with an antenna pad instead. The antenna must

be provided by the host device. Please strictly follow the integration instructions given to ensure proper

antenna performance.

RYZ012B1 has been certified in all regions with antenna model

PulseLarsen W1095K

Which is a monopole antenna with 1 dBi gain.

FCC/ISED (North America)

FCC/ISED covered regions allow the use of other monopole antennas with less than 1dBi gain. Antennas

which do not fulfill both requirements must be tested before they may be used with the module. Please

contact Renesas for further information.

Important Notice: If the antenna is not fixed to the device, the antenna connector must be unique (non-

standard). One type of antenna connector that fulfils this requirement is the Reverse SMA connector.