A microstrip tunable negative refractive index metamaterial and phase shifter

He, P.; Gao, J.; Marinis, C. T.; Parimi, P. V.; Vittoria, C.; Harris, V. G.
November 2008
Applied Physics Letters;11/10/2008, Vol. 93 Issue 19, p193505
Academic Journal
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° continuously by varying the bias field from 3.8 to 4.6 kOe at 9.0 GHz.


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