Apparatus for detection of the gradient of a magnetic field,...

Details Apparatus for detection of the gradient of a magnetic field,... Apparatus for detection of the gradient of a magnetic field,...

2005-09-09

2009-02-24

Dinh, Trinh V (Department: 2821)

Communications: radio wave antennas

Antennas

Including magnetic material

C343S7000MS, C343S850000, C343S853000, C343S893000

Reexamination Certificate

active

07495624

ABSTRACT:
An apparatus for detection of the gradient of a magnetic field includes at least four antenna elements (11, 12, 13, 14) composed of a ferromagnetic material, which are arranged in pairs, and a bridge circuit having at least four resistance elements (1, 2, 3, 4), which are associated with the antenna elements (11, 12, 13, 14) or antenna element pairs. Each antenna element pair has at least one associated resistance element (1, 2, 3, 4) whose resistance value is dependent on the field strength and on the direction of the magnetic field, and which resistance element (1, 2, 3, 4) is arranged in a field area (19) which extends between the two antenna elements (11, 12, 13, 14) of the antenna element pair. The invention also relates to a method for production of an apparatus which is intended for detection of the gradient of a magnetic field.

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