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Design, Fabrication and Measurement a Promising Photonic Crystal-like Structure inside a Rectangular Waveguide

Experimental and numerical studies of an electrodynamic structure assembled according to photonic crystals’ principles placed inside a X-band rectangular waveguide are considered. Such structures are promising for microwave electronics (vircators, FELs, and etc.). Efficient excitation of high-order (and, hence, high-frequency) electromagnetic modes is one the most valuable features of dispersion characteristics of photonic crystal-like structures. The proposed electrodynamic structure is a 2D array of thin metal pins. Transmission and reflection characteristics of the proposed structure were measured experimentally and evaluated numerically in K, Ka and Q bands. The experimental results are in good agreement with the numerical ones.