Using Meander Open Complementary Split Ring Resonator (MOCSRR) Particles to Design a Compact UHF RFID Tag Antenna

In this letter, a new printed dipole that uses series-connected meander open complementary split ring resonator (MOCSRR) particles is introduced. It is shown that by using the antenna presented here on a prototype passive UHF radio frequency identification (RFID) tag, useful read ranges up to 4.1 m can be achieved. The printed dipole on the prototype resonates at an overall dimension of approximately 0.1λ₀, where λ₀ is the free-space wavelength at resonance. The equivalent circuit of each MOCSRR particle is extracted and compared to the equivalent circuit of an open complementary split ring resonator (OCSRR) particle with the same overall dimensions and an OCSRR particle with larger overall dimensions. It is shown that the MOCSRR particle resonates at a lower frequency than both of the OCSRR particles, thus contributing to the lower resonant frequency of the antenna. The read range of the prototype is comparable to other passive UHF RFID tags with dimensions that are up to twice the overall size.