Baughman, Ray.

Niver, Edip

Zakhidov, A. Alex

Zakhidov, A. Anvar

English

Tunability of split ring resonator (SRR) arrays and back plane strip elements (plasmon meshs), known to achieve left handed metamaterial was investigated using varactor diodes connected between the split rings. Numerical simulations and measurements were carried out when these elements were placed in a slotted microwave waveguide. The slotted waveguide medium was preferred to simplify the connectivity of the bias voltage power supply to change the junction capacitance of varactor diodes. The resonance frequency of the split ring resonator and back plane strip configuration was determined using single element loaded waveguide measurements. The effect of the arrays of such elements, assembled into 2-d and 3-d photonic crystals, were measured and additional resonances were observed below the expected resonance frequency of the split ring resonator configuration due to internal interaction of the structure with the surrounding waveguide. Reverse bias voltage was applied to varactor diodes and tunability in terms of shift of the resonance frequency of SRR, broadening of the stop band region and further increase in the transmission loss due to loading with varactor diodes were observed. Preliminary numerical simulations are in agreement with the measurements. Further optimization for higher tunability is in progress for achieving tunable left handed metamaterials

Osaka University Knowledge Archive

Tunable Split-Ring Resonator Photonic Crystals for Left-Handed Electromagnetic Meta-Materials

https://ir.library.osaka-u.ac.jp/repo/ouka/all/81696/eme_10_02_193.pdf

Tunable Split-Ring Resonator Photonic Crystals for Left-Handed Electromagnetic Meta-Materials

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