Probe for sampling differential electromagnetic fields
First Claim
1. A probe for use in sensing electromagnetic fields produced by a pair of wires, comprising:
- a) two conductors that are separated from each other, the two conductors being structured and arranged to be inserted between the pair of wires for capacitive coupling to the pair of wires;
b) an insulating material that is located between the conductors;
c) each of the conductors comprising a set of conducting strips, with each of the strips in a respective set being separated from adjacent strips in the same set by gaps that are electrically isolated from the adjacent strips, each of the conductors comprising a connecting conductor that conductively couples the strips in a respective set together at some portion along a length of the strips in the respective set.
3 Assignments
0 Petitions
Accused Products
Abstract
A probe for use in sampling signals from a pair of telephone wires has two conductors that are separated from each other by an insulating material such as a circuit board. Each of the conductors has an overall size and has plural nonconductive interstices therein so as to reduce the capacitance of the probe. In one embodiment, each of the conductors is shaped like a comb having conductive strips. Each of the conductors could alternatively be shaped in a zig zag manner. The telephone wires are oriented parallel to the strips so as to enhance coupling therebetween. The probe can have plural channels thereon, such as two conductors on each side of the insulating material. The strips of one conductor are located in the gaps of the other conductor which on the same side of the insulating material. The probe can reduce common mode noise by being balanced. A grounded guard trace on each side of the insulating material snubs homogeneous electric fields.
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Citations
19 Claims
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1. A probe for use in sensing electromagnetic fields produced by a pair of wires, comprising:
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a) two conductors that are separated from each other, the two conductors being structured and arranged to be inserted between the pair of wires for capacitive coupling to the pair of wires; b) an insulating material that is located between the conductors; c) each of the conductors comprising a set of conducting strips, with each of the strips in a respective set being separated from adjacent strips in the same set by gaps that are electrically isolated from the adjacent strips, each of the conductors comprising a connecting conductor that conductively couples the strips in a respective set together at some portion along a length of the strips in the respective set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17, 18, 19)
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12. A circuit board for use in detecting signals on telephone cables, comprising:
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a) a probe area having a first surface and an opposite second surface, the first surface having a first conductive plate and the second surface having a second conductive plate, with each of the first and second conductive plates having an overall size and having plural nonconductive interstices therein so as to reduce a capacitance between the first and second conductive plates, said probe area being structured and arranged to be inserted between a pair of wires for capacitive coupling to the pair of wires; b) an electronics area that is integral to and adjacent to the probe area, the electronics area being structured and arranged to receive sensing electronics for use in processing a signal collected by the first and second conductive plates. - View Dependent Claims (13)
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14. An apparatus for use in detecting signals on telephone wires, comprising:
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a) two conductors that are separated from each other; b) an insulating material that is located between the conductors; c) each of the conductors having an overall size and having plural nonconductive interstices therein so as to reduce a capacitance of the two conductors; d) a signal detector having two inputs, with each of the conductors being connected to one of the inputs, the signal detector also having a human intelligible output. - View Dependent Claims (15)
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16. A method of sensing a signal in a pair of wires, comprising the steps of:
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a) providing a probe having two comb shaped conductors that are separated from each other, the comb shaped conductors having conductive parallel teeth; b) inserting the probe between the wires in the pair such that the wires are parallel to the conductive teeth; c) collecting a portion of the signal from the pair of wires with the probe.
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Specification