▎ 摘　　要

NOVELTY - The antenna (12) has electrical contact with one region of oxygenated graphene (9). An insulator of less than 100 micro meter thickness is present. The oxygenated graphene is arranged to alter electrical properties of antenna in response to environmental changes experienced by oxygenated graphene. The electrical properties of antenna alters by the oxygenated graphene comprise multiple resonant frequency of the antenna. An input impedance of antenna or a minimum scattering power of antenna is in response to environmental changes experienced by oxygenated graphene. USE - Antenna for RFID transponder and sensor (claimed) for measuring environmental conditions such as humidity, temperature and the presence of chemical compounds in vehicles, buildings and medical devices etc. ADVANTAGE - The effectiveness of wireless printed graphene enabled RFID oxygenated graphene humidity detection is increased. The sensor can be assembled layer by layer to fabricate a multifunctional sensor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of detecting an environmental change. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an operating principle of the GO based RFID sensor system. Oxygenated graphene (9) Antenna (12) Vapour (13) Backscattering signal (14) RFID reader (15)