@misc{Rakov_Denis_S._A,
 author={Rakov, Denis S. and Rakov, Aleksandr S. and Kudryavtsev, Andrey N. and Krasnenko, Nikolay P. and Chursin, Yury A. and Murin, Maksim A.},
 pages={301-307},
 abstract={<p>
 The paper presents results of numerical calculations and experimental 
 data on the directional pattern of two 38-element parametric arrays 
 composed of ultrasound sources. Two types of antenna arrays are 
 considered, namely with parallel and coaxial connections of ultrasonic 
 transducers (elements). The results of selecting and functional testing 
 of unit elements are described in this paper. It is found that in the 
 coaxial element connection of the antenna array, the level of side lobes 
 is higher than that in the parallel element connection.
 </p>},
 title={A Study of Directional Patterns of Ultrasonic Parametric Array},
 type={Article},
 keywords={antenna array, ultrasonic transducer, primary frequency, differential frequency, parametric array},
}