Title :
Multiple Reflection and Multi-Echo Electroacoustic Bulkwave Delay Lines
Author :
Puyhaubert, J. ; Seguin, M.
Author_Institution :
LIGNES TELEGRAPHIQUES ET TELEPHONIQUES - B.P. N° 5 - 78702 CONFLANS Ste. H. France
Abstract :
The present paper describes new solutions to reduce the diffraction losses in the microwave bulkwave delay lines. By backfocusing the spreaded beam produced by the transducer, it is possible to concentrate the acoustic waves and increase the efficiency of the delay line. In this way, we have obtained at 2 GHz a 8 ¿s delay line with an attenuation less than 16 dB. By the same principle, reflection and focusing of an acoustic wave, it has been possible to build multiecho delay lines producing pulse trains with well-defined codes.
Keywords :
Acoustic beams; Acoustic pulses; Acoustic reflection; Acoustic transducers; Acoustic waves; Attenuation; Delay lines; Electromagnetic reflection; Optical reflection; Propagation losses;
Conference_Titel :
Microwave Conference, 1976. 6th European
Conference_Location :
Rome, Italy
DOI :
10.1109/EUMA.1976.332282
