US Patent 10009984 Lighting device with first and second coupled and inter-movable antennas

Presented is a lighting device (100) with a light source and a heat dissipating element, comprising: an RF communication circuit (102); a first antenna (105) electrically connected to the RF communication circuit and supported by a first portion (115) of lighting device; and a second antenna (125) adapted to communicate with external devices and electromagnetically coupled with the first antenna so that the second antenna is adapted to be excited by and to excite the first antenna, the second antenna is adapted to communicate with external devices and being supported by a second portion of the lighting device, wherein the second portion of the lighting device is movable with respect to the first portion of the lighting device.