Millimeter wave and infrared electronics for investigations of acoustic-electromagnetic phenomena due to activity of Popocatepetl volcano

The report is devoted to millimeter and sub millimeter electronics intended for research of acoustic-electromagnetic phenomena caused by Popocatepetl volcano (Mexico). The main purpose is to present different types of sensors, one of them is based on a red and infra red silicon detector (avalanche photodiode with separated regions of absorption and multiplication). This sensor guarantees both a good sensibility and a wide range of sensing in infra red range. It has the advantage of a realization as a planar array. For millimeter and sub millimeter radar measurements, using a modulator based on the surface oriented p-i-n structure with "deep" junctions is possible. For the remote measurements of basic meteorological parameters and chemical state by means of radio brightness temperatures (radiometer systems), a low noise receiver based on a dielectric waveguides and Schottky diodes cooled by means of cryoelectronic elements can be used