Antenna structure, for different range communication modes
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United States of America Patent
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Oct 26, 2021
Grant Date -
May 21, 2020
app pub date -
May 1, 2018
filing date -
May 10, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
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.
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