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Quasi-3D helix metamaterial is constructed from multilayered 2D spiral structure with capacitive coupling between the adjacent layers. The sample is implemented with PCB, and linearly polarized microwave source is used in the measurement. The polarization plane is rotated to the opposite directions with left- and right-handed samples. The ratio of rotation angles is consistent with theoretical prediction.
This paper investigates the polarization rotation effect of metamaterial with a lattice of flattened spiral segments. This multilayered structure can be fabricated easily, and the simulation result shows that it can rotate the polarization effectively.
A gas-sensing probe has been investigated that involves the use of microwave resonant circuitry to detect frequency shifts/Q-changes in a resonant microwave cavity caused by absorption of chemical/biological agents onto carbon nanotubes (CNTs). Tests were made with single walled (SWNTs) to determine maximum selectivity of the probe. The ultimate goal is to accumulate a battery of test data for selected...
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