Metal wire grids has been used as polarizer in microwave and optical systems, as the spacing between wires d becomes smaller than the wavelength λ, the extinguish ratio between two polarization becomes large. In this experiment, the metal wire grid is replaced by Cold Cathode Florence Light (CCFL) tubes arranged in a tight formation, and the spacing between tube s is around 8 mm. Several metal wire grids of similar spacing are also constructed. Both kinds of grids are placed in an anechoic chamber and transmission measurements were conducted with a network analyzer.
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