Battery powered passive keyless entry system for premise entry

摘要

A passive keyless entry (PKE) system, comprising a DC power source and a base station with a housing that includes a first portion being made of a first material that shields radio frequency (RF) signaling and a second portion being made of a second material that permits RF signaling, is particularly adapted for premise entry and is designed to be powered by common household batteries to unlock a premise door as a user approaches within a prescribed arms-length distance from the premise door. The PKE system further comprises a printed circuit board and a low frequency (LF) emitting antenna coil positioned both perpendicular to the printed circuit board and behind the second material of the housing while having a center axis oriented in a horizontal orientation. The LF emitting antenna coil transmits a LF interrogating signal upon detecting a user within the prescribed arms-length distance from the base station.

主权项

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.