Tag for attachment to an animal
A tag for attachment to an animal comprising: a transmitter unit for generating a transmitter signal; a first antenna unit connected with the transmitter unit, for emitting the transmitter signal; an energy source for providing electrical energy to at least the transmitter unit; and a housing in which the transmitter unit, antenna unit and the energy source are included, the housing being provided with an attachment opening for receiving therethrough an attachment element for attachment of the tag to the animal, characterized in that the first antenna unit is provided with at least one first winding which extends around the attachment opening.
1. A tag for attachment to an animal, the tag being an active tag comprising:
a transmitter unit for generating a transmitter signal;
a first antenna unit connected with the transmitter unit, for emitting the transmitter signal;
an energy source for providing electrical energy to at least the transmitter unit; and a housing in which the transmitter unit, antenna unit and the energy source are included, the housing being provided with
an attachment opening for receiving therethrough an attachment element for attachment of the active tag to the animal, wherein the first antenna unit is provided with at least one first winding which extends around the attachment opening, the antenna unit being provided with a conductive wire comprising the at least one first winding, the conductive wire on one side comprising a connection side which is connected with the transmitter unit and on the other side comprising a free end.
2. The tag according to claim 1 , wherein the at least one first winding of the first antenna unit is configured to form a magnetic axis which substantially corresponds to an axial length of the attachment opening and/or to an axial length of the attachment element when the attachment element is received by the opening.
3. The tag according to claim 1 , wherein the at least one first winding comprises a multiplicity of first windings which in combination form a helix.
4. The tag according to claim 3 , wherein an axial length of the helix formed by the first windings substantially corresponds to an axial length of the attachment opening and/or to an axial length of the attachment element when the attachment element is received by the opening.
5. The tag according to claim 1 , wherein the attachment opening is provided outside a center of gravity of the active tag.
6. The tag according to claim 1 , wherein the housing comprises a substantially disc-shaped body part, the attachment opening being provided outside a center of the disc-shaped body part and being provided outside the disc-shaped body part.
7. The tag according to claim 1 , wherein the active tag is further provided with a processor for generating information with which the transmitter signal is modulated by the transmitter unit, wherein the processor is included in the housing and wherein in use, the energy source provides the processor with energy for the operation of the processor.
8. The tag according to claim 7 , wherein the active tag is further provided with at least one sensor system which is connected with the processor for generating at least a part of the information.
9. The tag according to claim 8 , wherein the sensor system comprises at least one of a temperature sensor, heart rhythm sensor, biosensor, a GPS sensor or G sensor.
10. The tag according to claim 1 , wherein the active tag is further provided with at least one receiver unit which is included in the housing and is connected with the antenna unit, wherein, in use, the energy source provides the receiver unit with energy for the operation of the receiver unit.
11. The tag according to claim 1 , wherein a least diameter of the at least one winding of the first antenna unit is at most 3 times, the maximum diameter of the attachment opening.
12. The tag according to claim 1 , wherein the active tag is further provided with the attachment element, wherein the attachment element is provided with a pin which, in use, extends through the attachment opening, wherein the pin comprises a rigid part which is made of metal and/or glass-filled plastic.
13. The tag according to claim 12 , wherein the pin is in the form of an arrow-shaped rod, wherein the arrow-shaped rod comprises an arrow head and an arrow body, wherein the axial length of the arrow body is approximately equal to the axial length of the attachment opening.
14. The tag according to claim 13 , wherein the attachment element comprises a base, wherein the pin extends from the base in a direction directed away from the base, wherein, in use, the base and an outer surface of the housing form opposite clamp surfaces for clamping there between a part of the body of the animal.
15. The tag according to claim 1 , wherein the first antenna unit is configured to emit the transmitter signal at a frequency which is less than 2.5 GHz.
16. The tag according to claim 1 , wherein the first antenna unit is configured to irradiate at least one receiver with the transmitter signal for determining the position of the active tag with the aid of the at least one receiver.
17. The tag according to claim 1 , wherein the transmitter signal contains information about the identification of the active tag.
18. The tag according to claim 1 , wherein the housing is made substantially of a plastic.
19. The tag according to claim 1 , wherein the energy source comprises at least one of a battery and a resonant circuit.