Two-axis, single output magnetic field sensing antenna
First Claim
1. An antenna assembly for sensing a time-varying magnetic field having a predetermined frequency, comprising:
- a first element having a sensing axis producing an amplitude response to the magnetic field and a transverse axis orthogonal to said sensing axis, said first element including at least one inductor; and
a second element in electrical communication with said first element, said second element having a sensing axis producing an amplitude response to the magnetic field and a transverse axis orthogonal to said sensing axis, said second element sensing axis being orthogonal to said first element sensing axis, either of said first element sensing axis and said first element transverse axis being co-linear with said second element transverse axis, said second element including at least one inductor.
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Accused Products
Abstract
A passive, non-multiplexed, two-axis antenna for sensing time-varying magnetic fields of a particular carrier frequency at a second point in space as produced by a electromagnetic field generator located at a first point in space. The antenna has a particular sensitive plane and produces a single output signal having amplitude proportionally related to the magnitude of the incident magnetic field'"'"'s vector projection onto the antenna'"'"'s sensitive plane. If the phase of the magnetic field is known, then the antenna'"'"'s signal is processed to obtain the incident magnetic field'"'"'s vector components. The antenna enables the realization of two- or three-axis magnetic field receivers with reduced signal processing complexity, cost and power requirements.
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Citations
17 Claims
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1. An antenna assembly for sensing a time-varying magnetic field having a predetermined frequency, comprising:
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a first element having a sensing axis producing an amplitude response to the magnetic field and a transverse axis orthogonal to said sensing axis, said first element including at least one inductor; and
a second element in electrical communication with said first element, said second element having a sensing axis producing an amplitude response to the magnetic field and a transverse axis orthogonal to said sensing axis, said second element sensing axis being orthogonal to said first element sensing axis, either of said first element sensing axis and said first element transverse axis being co-linear with said second element transverse axis, said second element including at least one inductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification