![]() However, despite their advantages, the main drawback of chipless tags is the absence of a dedicated standard and above all a strong limitation of use in terms of read range due to the impact of the environment: each object being also a reflective object. ![]() Due to the absence of any active electronics in chipless RFID tags, these structures have a great potential to be employed for sensing applications without the risk of damaging the IC, for example, in an environment with a high temperature level. ![]() However, there exists another category of RFID tags that do not include an IC (i.e., chipless tags) and where the signal backscattered to the reader consists on a ‘signature’ defined by the antenna (i.e., simple reflecting element) properties such as geometry and materials. In general, an RFID tag can be simplified as the association between an antenna (usually a dipole) and an integrated circuit (IC), which processes the signal originating from the reader. Passive RFID is a technology that originally identified objects associated to a device called a ‘tag’ using the backscattering technique.
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