Antenna structure, for different range communication modes
The invention provides an antenna structure comprising a plurality of wire segments formed in a loop. Connecting units are provided between the wire segments, each of which is switchable between a conductive state and a reactive state. With the connecting units in the conductive state a loop antenna is formed with a first (longer) signal range and with the connecting units in the reactive state an antenna structure is formed with a second (shorter) signal range. Said reactive state is adapted to introduce a phase delay between the adjacent wire segments. This enables the same antenna to be used for long range signal communication and short range communication, for example for system configuration or commissioning. The antenna structure may be used with luminaires of a lighting system.
SIGNIFY HOLDING B.V.
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Gang You Liang Wei Hong Peiliang
Wang Li Shi Zhao Dong