Proximity sensor & antenna combine to optimise functions

The ProxAnt TL 1.0 is a seven band main antenna, a proximity sensor chip and all needed components included on the same flexible circuit board. Without requiring physical contact, the sensor recognises when it is close to the user and sends a signal to the host processor to reduce the transmission power to the antenna, thus lowering SAR. The sensor also recognises movement to avoid a false trigger. Dimensions for the antenna carrier (X x Y x Z) are 60x11.2x4.2mm.

The proximity sensor footprint dimension (X x Y) is 13x8.8mm. The proximity sensor area extends 6mm from the antenna carrier in the Y-dimension and occupies the same volume as the antenna to optimise space utilisation in a compact module. During product development design changes are flexible and easier because only the ProxAnt package needs optimisation, and not the main PCB.

"The ProxAnt optimises the antenna and proximity function as one entity, instead of separately. This integration minimises the combined size and simplifies logistics to give the best possible antenna performance," explained Jon Yu, GM for Pulse Electronics Wireless Consumer Business Unit.