DUAL ANTENNA WIRELESS COMMUNICATION DEVICE IN A LOAD CONTROL SYSTEM
First Claim
1. A wireless communication device for use in a load control system for controlling one or more electrical loads, the wireless communication device comprising:
- a counterpoise;
a first antenna having a longitudinal axis extending substantially perpendicular to the counterpoise;
a second antenna extending in a plane that is substantially parallel to the counterpoise, the first and second antennas sharing the counterpoise; and
an radio-frequency communication circuit coupled to the first and second antennas for transmitting a first wireless signal via the first antenna at a transmission frequency and a second wireless signal via the second antenna at the transmission frequency.
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Accused Products
Abstract
A wireless communication device for use in a load control system for controlling one or more electrical loads may comprise a counterpoise, a first and second antennas, a RF communication circuit and a control circuit. The two antennas may be oriented differently and spaced apart from each other. For example, the first antenna may extend perpendicularly from the counterpoise while the second antenna extends in a plane substantially parallel to the counterpoise. The first antenna may extend from the counterpoise at a point substantially central to the counterpoise while the second antenna may extend along a perimeter of the counterpoise. The RF communication circuit may transmit wireless signals via the first and second antennas. The control circuit may cause the RF communication circuit to transmit a first wireless signal in a first time slot and a second wireless signal in a second time slot.
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Citations
34 Claims
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1. A wireless communication device for use in a load control system for controlling one or more electrical loads, the wireless communication device comprising:
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a counterpoise; a first antenna having a longitudinal axis extending substantially perpendicular to the counterpoise; a second antenna extending in a plane that is substantially parallel to the counterpoise, the first and second antennas sharing the counterpoise; and an radio-frequency communication circuit coupled to the first and second antennas for transmitting a first wireless signal via the first antenna at a transmission frequency and a second wireless signal via the second antenna at the transmission frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A wireless communication device comprising:
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a counterpoise; a first antenna having a longitudinal axis extending in a direction substantially perpendicular to the counterpoise; a second antenna extending in a plane that is substantially parallel to the counterpoise, the first and second antennas sharing the counterpoise; and a radio-frequency communication circuit coupled to the first and second antennas for transmitting a first wireless signal via the first antenna at a transmission frequency and a second wireless signal via the second antenna at the transmission frequency; wherein the first and second antennas are spaced apart by less than a quarter of a wavelength of the transmission frequency. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A wireless communication device for use in a load control system for controlling one or more electrical loads, the wireless communication device comprising:
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a counterpoise defining a substantially circular area; a first antenna having a longitudinal axis extending from the area of the counterpoise in a direction substantially perpendicular to the counterpoise; a second antenna extending in a substantially circular manner in an area that is outside the area of the counterpoise and substantially parallel to the counterpoise; a radio-frequency communication circuit coupled to the first and second antennas for transmitting a first wireless signal via the first antenna at a transmission frequency and a second wireless signal via the second antenna at the transmission frequency; and a control circuit coupled to the radio-frequency communication circuit for causing the radio-frequency communication circuit to transmit the first wireless signal in a first time slot and the second wireless signal in a second time slot. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification