An RFID device, comprising: - a substrate; - an antenna including: i. a first antenna section on a first side of the substrate, the first antenna section including a first plurality of vias that extend through the substrate from the first side of the substrate to a second side of the substrate, wherein the first plurality of vias are separated from one another on the first side by the substrate and electrically connected to the first antenna section by respective first conductive traces on the first side of the substrate; ii. a second antenna section on the first side of the substrate and separated from the first antenna section by a non-conductive part of the substrate; and iii. a third antenna section on at least the second side of the substrate, the third antenna section being electrically connected to conductive portions of the first plurality of vias and the second antenna section; and - a circuit on the substrate to process signals of the antenna, the circuit including a first terminal electrically connected to the first antenna section and a second terminal electrically connected to the second antenna section - characterized in that the RFID device further comprises a protective material that encases the circuit and the first, second, and third antenna sections (115, 125, 150) and exposes the first plurality of vias. - a substrate; - an antenna including: i. a first antenna section on a first side of the substrate, the first antenna section including a first plurality of vias that extend through the substrate from the first side of the substrate to a second side of the substrate, wherein the first plurality of vias are separated from one another on the first side by the substrate and electrically connected to the first antenna section by respective first conductive traces on the first side of the substrate; ii. a second antenna section on the first side of the substrate and separated from the first antenna section by a non-conductive part of the substrate; and iii. a third antenna section on at least the second side of the substrate, the third antenna section being electrically connected to conductive portions of the first plurality of vias and the second antenna section; and i. a first antenna section on a first side of the substrate, the first antenna section including a first plurality of vias that extend through the substrate from the first side of the substrate to a second side of the substrate, wherein the first plurality of vias are separated from one another on the first side by the substrate and electrically connected to the first antenna section by respective first conductive traces on the first side of the substrate; ii. a second antenna section on the first side of the substrate and separated from the first antenna section by a non-conductive part of the substrate; and iii. a third antenna section on at least the second side of the substrate, the third antenna section being electrically connected to conductive portions of the first plurality of vias and the second antenna section; and - a circuit on the substrate to process signals of the antenna, the circuit including a first terminal electrically connected to the first antenna section and a second terminal electrically connected to the second antenna section - characterized in that the RFID device further comprises a protective material that encases the circuit and the first, second, and third antenna sections (115, 125, 150) and exposes the first plurality of vias.