> 4.1 | Antenna Installation

> To suit the physical design of individual applications TC65 offers two alternative approaches to connecting the antenna:

> • | Recommended approach: U.FL-R-SMT antenna connector from Hirose assembled on the component side of the PCB (top view on TC65). See Section 4.3 for details.

> • | Antenna pad and grounding plane placed on the bottom side. See Section 4.2.

> The U.FL-R-SMT connector has been chosen as antenna reference point (ARP) for the Siemens reference equipment submitted to type approve TC65. All RF data specified throughout this manual are related to the ARP. For compliance with the test results of the Siemens type approval you are advised to give priority to the connector, rather than using the antenna pad.
> IMPORTANT: Both solutions can only be applied alternatively. This means, whenever an antenna is plugged to the Hirose connector, the pad must not be used. Vice versa, if the antenna is connected to the pad, then the Hirose connector must be left empty.

> Antenna connected to Hirose connector: | Antenna connected to pad:

> Figure 40: Never use antenna connector and antenna pad at the same time
> No matter which option you choose, ensure that the antenna pad does not come into contact with the holding device or any other components of the host application. It needs to be surrounded by a restricted area filled with air, which must also be reserved 0.8mm in height.
> Figure 41: Restricted area around antenna pad