Aerial arrays for inductive communications systems
First Claim
1. A magnetic inductive communication system comprising:
- a base unit for transmitting a first rotating magnetic inductive field and for receiving a second rotating magnetic inductive field; and
a remote unit for transmitting the second rotating magnetic field and for receiving the first rotating magnetic inductive field,wherein the rotating fields avoid directional nulls by providing a continuous constant response throughout a range of angles without switching between multiple transducers.
1 Assignment
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Accused Products
Abstract
A communication link includes a base unit and a remote unit that each include a transmit aerial and a receive aerial. These units communicate via magnetic inductive fields. The transmit aerial may be an array that shapes the field to transmit in front of the base unit to minimize interference between adjacent base units. Transmission from the base unit to the remote unit preferably uses magnetic inductive fields that are orthogonal to the magnetic inductive fields that transmit from the remote unit to the base unit. Accordingly, the aerials include aerials for receiving and transmitting in such orientations. A tri-axial array includes three aerials that are orthogonal to each other to allow the aerials to be driven by currents that are phase shifted and amplitude modulated so that the plane of the field is selectively tilted to maximize coupling between the base unit and remote unit. Such tilting allows the user of the remote unit to move relative to the base unit and maintain maximum coupling.
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Citations
9 Claims
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1. A magnetic inductive communication system comprising:
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a base unit for transmitting a first rotating magnetic inductive field and for receiving a second rotating magnetic inductive field; and a remote unit for transmitting the second rotating magnetic field and for receiving the first rotating magnetic inductive field, wherein the rotating fields avoid directional nulls by providing a continuous constant response throughout a range of angles without switching between multiple transducers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A magnetic inductive communication system, comprising:
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a first aerial for generating a first magnetic inductive field and for receiving a second magnetic inductive field, wherein the first aerial is a loop and the first magnetic inductive field is generated external to a space enclosed by the loop; and a second aerial for generating the second magnetic inductive field and for receiving the first magnetic inductive field, wherein the first magnetic inductive field communicates data from the first aerial to the second aerial and the second magnetic inductive field communicates data from the second aerial to the first aerial, wherein the first aerial is an aerial array that comprises a main multi-turn loop aerial and an auxiliary multi-turn loop aerial that respectively generate a main magnetic inductive field and an auxiliary magnetic inductive field to generate the first magnetic inductive field, the main multi-turn loop aerial being spaced apart from the auxiliary multi-turn loop aerial at a distance at which the sum of the main and auxiliary magnetic inductive fields is directional and quasi-static. - View Dependent Claims (9)
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Specification