microstrip tunable negative refractive index metamaterial and phase shifter

• Online Access: http://hdl.handle.net/2047/d20002190

A tunable negative refractive index metamaterial and miniature phase shifter have been designed and fabricated in a microstrip configuration for applications in radio frequency integrated circuits. The metamaterial consists of plasmonic copper wires and yttrium iron garnet slabs having a low insertion loss of 5 dB at the center of the transmission band. The yttrium iron garnet material enables the magnetic field tuning of the negative refractive index in a dynamic frequency band from 7.0 to 11.0 GHz. The insertion phase can be tuned by 45 degrees continuously by varying the bias field from 3.8 to 4.6 kOe at 9.0 GHz.