On-road slot antenna with corrugated ground for road-curtain machine-to-machine RFID application

A novel slot antenna designed on the road surface for machine-to-machine (M2M) RFID communication is presented. A corrugated ground plane with perturbed surface impedance is used underneath the antenna´s radiator to adjust the antenna´s radiation pattern, which otherwise will be highly affected by the properties of the road surface. The proposed antenna configuration is verified by full-wave simulations with various road surface conditions. The results show that the antenna has a stable performance with different road conditions. It possesses more than 12 dB return loss, more than 1.4 dBi gain, vertical polarization, and desirable radiation pattern from 880 MHz to 960 MHz.