COMBINED RADIO AND ACOUSTIC ANTENNA Russian patent published in 2001 - IPC

FIELD: meteorological equipment for atmospheric sounding, in particular, devices for determining the main meteorological quantities in the boundary atmospheric layer, applicable in the interests of the aircraft take-off and landing safety service. SUBSTANCE: a radioacoustic feed in the form of a section of a metal rectangular waveguide with a cross-section, whose dimensions provide for propagation of the first electromagnetic mode is installed in the combined radioacoustic feed in the focus of the parabolic mirror, an electroacoustic transducer with an acoustic matching device is inserted on the side of one end in the waveguide section, cross metal grid and a coaxial-waveguide junction matched for electromagnetic oscillations, the second end of the waveguide section is connected to the throat of the pyramidal metal horn, the parabolic mirror is provided with an outside expanding metal barrel of broken profile, having a soundradioabsorbing inner coating, the excess of the barrel longitudinal dimension over the first end of the waveguide section makes up a value of not less than the mirror diameter. EFFECT: reduced level of lateral radiation at reception of electromagnetic and acoustic waves. 2 dwg