An antenna system (2a-d) for determining the transit of a moving object through an area of interest within a detection plane, the moving object emitting a magnetic field, the antenna system (2a-d) comprising: at least one loop antenna (4a-4d) for receiving the electromagnetic field, the at least one loop antenna arranged only within an antenna plane, the antenna plane being perpendicular to the detection plane, wherein the at least one loop antenna comprises a first signal path and a second signal path symmetrical to the detection plane, the first and second signal paths splitting at a first terminal and summing up at second terminal, the first signal path comprising a first conductor segment extending in parallel to the detection plane and the second signal path comprises a second conductor segment extending in parallel to the detection plane; a ground loop signal path connected to the terminals of the at least one loop antenna (4a-d) such as to close a conductive loop enclosing the detection plane to generate an exciting electromagnetic field, wherein an excitation signal in the conductive loop is split at the first terminal and summed up at the second terminal to use the first signal path and the second signal path of the at least one loop antenna (4a-4c) for the generation of the exciting electromagnetic field, wherein the exciting electromagnetic field is configured to excite the moving object to the emission of the magnetic field; wherein the first terminal is situated between a first coil being part of the first signal path and a second coil being part of the second signal path, the first coil and the second coil having windings of opposite orientation; wherein a transformer comprising said first coil and said second coil further comprises a third coil coupled to the first coil and the second coil such that essentially no current is induced in the third coil when a current through the first coil and the second coil is essentially equal; and further comprising a signal terminal comprising a first signal terminal coupled to a first side of the third coil and a second signal terminal coupled a different second side of the third coil for providing a receive signal (44a, 44b), the receive signal (44a, 44b) comprising information on a position of the moving object. at least one loop antenna (4a-4d) for receiving the electromagnetic field, the at least one loop antenna arranged only within an antenna plane, the antenna plane being perpendicular to the detection plane, wherein the at least one loop antenna comprises a first signal path and a second signal path symmetrical to the detection plane, the first and second signal paths splitting at a first terminal and summing up at second terminal, the first signal path comprising a first conductor segment extending in parallel to the detection plane and the second signal path comprises a second conductor segment extending in parallel to the detection plane; a ground loop signal path connected to the terminals of the at least one loop antenna (4a-d) such as to close a conductive loop enclosing the detection plane to generate an exciting electromagnetic field, wherein an excitation signal in the conductive loop is split at the first terminal and summed up at the second terminal to use the first signal path and the second signal path of the at least one loop antenna (4a-4c) for the generation of the exciting electromagnetic field, wherein the exciting electromagnetic field is configured to excite the moving object to the emission of the magnetic field; wherein the first terminal is situated between a first coil being part of the first signal path and a second coil being part of the second signal path, the first coil and the second coil having windings of opposite orientation; wherein a transformer comprising said first coil and said second coil further comprises a third coil coupled to the first coil and the second coil such that essentially no current is induced in the third coil when a current through the first coil and the second coil is essentially equal; and further comprising a signal terminal comprising a first signal terminal coupled to a first side of the third coil and a second signal terminal coupled a different second side of the third coil for providing a receive signal (44a, 44b), the receive signal (44a, 44b) comprising information on a position of the moving object.