Electronic ID tag and co-operating antenna
An electronic ID tag ( 2 ) for mounting in a body ( 18 ), in which at least the identity of the body ( 18 ) is to be remotely readable, the electronic ID tag ( 2 ) including an identifiable chip ( 24 ) which is electrically connected to at least one adjacent antenna ( 26 ), the identifiable chip ( 24 ) being arranged to receive energy via the adjacent antenna ( 26 ) and by means of this energy to transmit, via the adjacent antenna ( 26 ), a signal including the identity of the electronic ID tag to a distant antenna ( 1 ), and there being arranged, between the adjacent antenna ( 26 ) and the identifiable chip ( 24 ) and between the identifiable chip ( 24 ) and a ground-plane plate ( 28 ) impedance-matched inductances ( 34, 40 ), the electronic ID tag ( 2 ) being placed, with advantage, in the box portion or pin ( 44 ) of a body ( 18 ), whereby it is protected against mechanical wear.
1. An electronic ID tag for mounting in a body wherein at least an identity of the body is remotely readable, the electronic ID tag comprising:
an identifiable chip wherein the identifiable chip is electrically connected to at least one adjacent antenna wherein the identifiable chip is arranged to receive energy via the adjacent antenna wherein the identifiable chip is arranged to transmit a signal to a distant antenna by means of the energy via the adjacent antenna wherein the signal includes the identity of the body wherein impedance-matched inductances are arranged between the adjacent antenna and the identifiable chip and between the identifiable chip and a ground-plane plate.
2. The electronic ID tag of claim 1 wherein the identifiable chip and the adjacent antenna are encapsulated in a housing by a casting substance wherein a dielectric constant of the casting substance is less than 5 times a dielectric constant of air.
3. The electronic ID tag of claim 1 wherein the energy is supplied to the identifiable chip by the distant antenna.
4. The electronic ID tag of claim 1 wherein the identifiable chip is electrically connected to the body.
5. The electronic ID tag of claim 2 wherein the housing is electrically conductive wherein the housing is arranged to be attached in a tag recess of the body.
6. The electronic ID tag of claim 1 wherein the electronic ID tag is placed in a pin of the body wherein the pin protects the electronic ID tag against mechanical wear.