F-inverted compact antenna for wireless sensor networks and manufacturing method
First Claim
1. An F-inverted compact antenna for ultra low volume Wireless Sensor Networks (WSN), comprising:
- a ground plane board,a dielectric block attached to a surface of said ground plane board at a predetermined location thereof, anda helically contoured member attached to said dielectric block and disposed with an axis of said helically contoured member extending substantially in parallel to said surface of said ground plane board, said helically contoured member including a pre-wound wire portion having a first end and a second end and a plurality of coils between said first and second ends, and a wire part coupled at a tapping end thereof to said pre-wound wire portion at a predetermined tapping point,wherein said first end of said pre-wound wire portion and another end of said wire part opposite to said tapping end thereof are coupled respectively to feeding and shorting points of said compact antenna.
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Accused Products
Abstract
An F-inverted compact antenna for ultra-low volume Wireless Sensor Networks is developed with a volume of 0.024λ×0.06λ×0.076λ, ground plane included, where λ is a resonating frequency of the antenna. The radiation efficiency attained is 48.53% and the peak gain is −1.38 dB. The antenna is easily scaled to higher operating frequencies up to 2500 MHz bands with comparable performance. The antenna successfully transmits and receives signals with tolerable errors. It includes a standard PCB board with dielectric block thereon and helically contoured antenna wound from a copper wire attached to the dielectric block and oriented with the helix axis parallel to the PCB. The antenna demonstrates omnidirectional radiation patterns and is highly integratable with WSN, specifically in Smart Dust sensors. The antenna balances the trade offs between performance and overall size and may be manufactured with the use of milling technique and laser cutters.
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Citations
20 Claims
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1. An F-inverted compact antenna for ultra low volume Wireless Sensor Networks (WSN), comprising:
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a ground plane board, a dielectric block attached to a surface of said ground plane board at a predetermined location thereof, and a helically contoured member attached to said dielectric block and disposed with an axis of said helically contoured member extending substantially in parallel to said surface of said ground plane board, said helically contoured member including a pre-wound wire portion having a first end and a second end and a plurality of coils between said first and second ends, and a wire part coupled at a tapping end thereof to said pre-wound wire portion at a predetermined tapping point, wherein said first end of said pre-wound wire portion and another end of said wire part opposite to said tapping end thereof are coupled respectively to feeding and shorting points of said compact antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for manufacturing an F-inverted compact antenna for ultra-low volume Wireless Sensor Networks (WSN), comprising the steps of:
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providing a ground plane board of predetermined dimensions compatible with the ultra-low volume WSN, forming a dielectric block having a plurality substantially parallel receiving structures of predetermined dimensions, and spaced predetermined distance one from another, attaching said dielectric block to a surface of said ground plane board at a predefined position thereof, pre-winding a wire of a predetermined length and diameter into a helically contoured member having a plurality of coils coordinated with said receiving structures of said dielectric block, said helically contoured member having a first end and a second end, coupling a tapping end of a wire part of a predetermined length to a predetermined tapping location of a respective one of said plurality of coils, attaching said helically contoured member to said dielectric block with the axis of said helically contoured member extending substantially in parallel to said surface of said ground plane board, wherein each of said plurality of coils of said helically contoured member is received in a respective one of said plurality of receiving structures of said dielectric block, and coupling said first end of said helically contoured member to a feeding point, and shorting said wire part to said ground plane board. - View Dependent Claims (19, 20)
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Specification