Bratashov Daniil Nikolayevich RussiaSaratov State University, 410012, Russia, Saratov, Astrakhanskaya street, 83dn2010@gmail.com Author's articles Research of the Contact Pads Topology Influence on the Parameters Reproducibility of the Current Oscillations in Mesa-Planar Structures Based on Semi-Insulatinggallium Arsenide