Patent ID: 8965287
Filing Date: 2015-02-24
Classification: G07C

Abstract:
1. A base station comprising: a housing including a first portion being made of a first material and a second portion being made of a second material different than the first material, the second material having a composition to shield radio frequency (RF) signaling while the first material having a composition that allows for the propagation, transmission or reception of RF signaling; a power source; a printed circuit board; and a low frequency (LF) transmitter coupled to the power source and mounted on the printed circuit board, the LF transmitter comprises a LF emitting antenna coil positioned both perpendicular to the printed circuit board and behind the first material of the housing and having a center axis oriented in a horizontal orientation, the LF antenna coil transmitting an interrogating signal upon detecting a user within a prescribed arms-length distance from the base station.