Lighting fixtures incorporating Rf antennae
First Claim
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1. A lighting fixture including an external lamp housing for confinement of a lamp and an electrical control system, the external lamp housing including:
- a first lower enclosure portion thereof formed from electrically non-conductive material, the first lower enclosure portion forming a suitable substrate for a radio frequency antenna which is integrally formed therewith preferably in the form of an electrically conductive pattern or wire disposed on or in a sidewall of the first lower enclosure portion, the radio frequency antenna including a plurality of electrically conductive elements of appropriate length to correspond to an appropriate operational frequency of an RF driver circuit, wherein each element is spaced at appropriate fractions of the operational wavelength for maximum transmission efficiency; and
wherein the first lower enclosure portion is formed from a translucent material through which optical output of the lighting fixture is directed such that the lower enclosure portion presents a line of sight to the lamp in at least two opposing directions substantially along a horizontal plane passing through or adjacent to the lamp, anda second substantially opaque portion confining the electrical control system of the lighting fixture.
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Abstract
A lighting fixture, such as for street lighting, comprises an external housing (11) which has a radio frequency antenna (26, 26a, 27) integrally formed therewith. The RF antenna enables telemanagement signals to be passed to the lighting fixture, and for the telemanagement signals to be passed between lighting fixtures in a network. The RF antenna is ideally located in or on a translucent dome portion (14) of the lighting fixture which is invariably formed from a dielectric (non-conductive) material and therefore avoids undesirable RF shielding in at least preferred directions.
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Citations
14 Claims
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1. A lighting fixture including an external lamp housing for confinement of a lamp and an electrical control system, the external lamp housing including:
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a first lower enclosure portion thereof formed from electrically non-conductive material, the first lower enclosure portion forming a suitable substrate for a radio frequency antenna which is integrally formed therewith preferably in the form of an electrically conductive pattern or wire disposed on or in a sidewall of the first lower enclosure portion, the radio frequency antenna including a plurality of electrically conductive elements of appropriate length to correspond to an appropriate operational frequency of an RF driver circuit, wherein each element is spaced at appropriate fractions of the operational wavelength for maximum transmission efficiency; and
wherein the first lower enclosure portion is formed from a translucent material through which optical output of the lighting fixture is directed such that the lower enclosure portion presents a line of sight to the lamp in at least two opposing directions substantially along a horizontal plane passing through or adjacent to the lamp, anda second substantially opaque portion confining the electrical control system of the lighting fixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification