Abstract
A metallic photonic crystal of copper rods of diameter 2 mm at lattice constant 10 mm for x-band microwave is fabricated and experiments are carried out to measure flat and forbidden bends for 18 GHz. Positive and negative refraction are studied by creating defaults in the photonic crystal. A plasma column, which is formed by Micro-hollow cathode discharge (MHCD) at atmospheric pressure, is situated between transmitter and photonic crystal. Electromagnetic bend gaps are studied. Due to presence of plasma column forbidden and flat bends can be interchanged. Therefore, transmission of microwave can be controlled by switching ON and OFF the plasma column.
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