Luminaire assembly, system and method
AssigneeSignify Holding B.V.
InventorsGUIDO THEO MARIA LAMERICHS, HENRICUS MATHIJS MARIA CREEMERS
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Abstract
An outdoor luminaire (1) is provided, comprising a light module (3), an RF module (5) and a canopy (7). The light module (3) is at least partly covered by the canopy (7) and comprises a light source (9) for emitting light from the luminaire (1). The RF module (5) is at least partly covered by the canopy (7) and comprises one or more antennas (21) configured for emitting and/or receiving an RF signal in a predetermined RF frequency band and along a respective signal beam path (SP). The canopy (7) comprises one or more RF windows (23) associated with the one or more antennas (21). Each antenna (21) is spaced from the associated window (23) by a reflection minimizing distance (d) and the window has a loss minimizing thickness (t).
Claims14
An outdoor luminaire comprising a light module, an RF module, and a canopy,
- wherein the light module is at least partly covered by the canopy and comprises a light source for emitting light from the luminaire,
- wherein the RF module is at least partly covered by the canopy and comprises one or more antennas configured to emit and/or receive an RF signal in a predetermined RF frequency band along a respective signal beam path,
- wherein the canopy comprises one or more RF windows associated with the one or more antennas,
- wherein the RF module and the canopy are arranged such that for each assembly of an antenna and an RF window associated with each other, respectively,
- the RF signal beam path passes through the RF window,
- the antenna is spaced along the signal beam path from an inner surface of the RF window by a reflection minimizing distance of an odd integer times half an effective wavelength of the RF signal between the antenna and the window, wherein d=((2m−1)/2)λm wherein m is a positive integer, and
- the RF window has a loss minimizing thickness along the signal beam path being substantially of an odd integer times half an effective wavelength of the signal in the window, wherein t=((2n−1)/2)λw wherein n is a positive integer, and
- wherein the RF window has a radius of curvature about the signal beam path of at least one of 10 times the effective wavelength of the signal in the window and 10 times the effective wavelength of the signal between the antenna and the inner window surface.
A computer implemented method for designing a luminaire canopy for an outdoor luminaire, comprising:
- a processor of a computer system configured to:
- receive RF signal data indicative of at least one of an RF frequency and an RF wavelength of an RF signal, the RF signal being in a predetermined RF frequency band,
- receive first RF window data indicative of a position, an orientation and of a first window surface of an RF window in the canopy,
- receive first signal beam path data indicative of a signal beam path of the RF signal traversing the RF window,
- receive window material data indicative of a dielectric constant (relative permittivity) of the RF window for the predetermined RF frequency band,
- receive first antenna data indicative of one or more antenna fixtures relative to a position and an orientation of an emission and/or detection member of an RF antenna configured to emit and/or receive the RF signal, respectively, along the signal beam path,
- and
- calculate second RF window data indicative of,
- a position and an orientation of a second window surface of the RF window opposite the first window surface along the signal beam path, and of,
- a loss minimizing thickness of the RF window from the first surface to the second surface along the signal beam path of substantially an odd integer times half an effective wavelength of the signal in the RF window, wherein t=(2n−1)/2λw, wherein n is a positive integer,
- determine, based on at least one of the first and second RF window data, one of the first and second window surfaces as an inner window surface of the RF window on an inside of the canopy and the other one of the first and second window surfaces as an outer window surface of the RF window on an outside of the canopy,
- calculate second antenna data indicative of a position and an orientation of the one or more antenna fixtures, associated with the emission and/or detection member of the antenna being spaced along the signal beam path from the inner window surface by a reflection minimizing distance of an odd integer times half an effective wavelength of the signal between the antenna and the inner window surface, wherein d=((2m−1)/2)λm, wherein m is a positive integer, and
- determine a curvature of the first and/or second window surface about the signal beam path, wherein the curvature has a radius of curvature of at least one of 10 times the effective wavelength of the signal in the window and 10 times the effective wavelength of the signal between the antenna and the inner window surface.
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Dependencies are inferred from the claim text.