Identification sensor for structures buried in very deep places

摘要

A transponder for an RFID-type wireless communication and contactless identification system configured to be secured to (or near) a structure intended to be embedded, the transponder comprising at least first and second antenna elements ( 203-1, 203-2) comprising a set of antenna segments consisting of electrical wires constituting a circuit board, wherein the circuit board has an RFID chip and at least one tuning capacitor (202x), as well as coupling that allows electrical coupling of the antenna segments With means (281), the antenna segments are arranged close to each other at a distance of less than 3 mm, preferably less than 1 mm, allowing the appearance of a coupling capacitance (280) that can broaden the tolerance band of the RFID resonant frequency A transponder is provided. [Selection] Figure 7a