The computer simulation and experimental investigation of the frequency dependencies of the reflectance and transmittance of photon crystals based on the microstrip lines in the 0–20 GHz frequency band have been performed. The investigations were conducted for the photon crystal with the irregularity, introduced as the changed geometry size of the stripline conductor or changed substrate permittivity of one of the sequence microstrip sections. A good agreement between the calculations and the experimental results has been obtained. The possibility for application of open microwave transmission lines for realizing the parameters measurement method of the material, which acts as irregularity in photon crystal, has been demonstrated.
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