▎ 摘　　要

NOVELTY - The device has a receiver that is configured to receive a harmonic signal and performs a detection process. The transmitter and the receiver are connected to the duplexer, and are connected to the first antenna by a duplexer for transmitting or receiving signals. The two non-adjacent microstrip connecting lines are respectively connected in series to form a direct current circuit, and a microstrip connecting line is connected to the second dual frequency antenna. A microstrip cable is connected to the radio frequeny (RF) front end of the RFID chip by a DC blocking capacitor. The RFID chip is connected to the DC power supply by a resistor in parallel with the DC circuit. The RFID chip is used to determine the resistance of the multilayer graphene patch according to the voltage and current of the DC circuit, and determine the gas concentration to be measured according to the magnitude of the resistance. USE - Graphene-based gas sensing and harmonic detection integrated device. ADVANTAGE - The graphene-based gas sensing and harmonic detection integrated device fully utilizes the nonlinear characteristics and gas sensing characteristics of graphene, and provides high integration, low power consumption and small device size through harmonics into wireless detection and signal transmission. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for detecting graphene-based gas sensing and harmonic detecting integrated device. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the graphene-based gas sensing and harmonic detection integrated device. (Drawing includes non-English language text)