DEVICE OF IDENTIFICATION AT SURFACE ACOUSTIC WAVES

FIELD: radio engineering. ^ SUBSTANCE: identification device consists of casing, receiver-transmitter antenna, several acoustic channels, which are installed in different acoustic ducts. In every acoustic channel there is receiver-transmitter IDT and reflecting IDT in parallel acoustic channels with...

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Bibliographische Detailangaben
Hauptverfasser:	KARAPET'JAN GEVORK JAKOVLEVICH, BAGDASARJAN SERGEJ ALEKSANDROVICH, BAGDASARJAN ALEKSANDR SERGEEVICH, NEFEDOVA NAIRA ALEKSANDROVNA
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	FIELD: radio engineering. ^ SUBSTANCE: identification device consists of casing, receiver-transmitter antenna, several acoustic channels, which are installed in different acoustic ducts. In every acoustic channel there is receiver-transmitter IDT and reflecting IDT in parallel acoustic channels with the same period L0i, which is different in different acoustic ducts, and frequency-selective multiple-stripe directional coupler between them. The distance between transducers is different in different acoustic ducts. Receiver-transmitter IDT in all acoustic ducts are made unidirectional with internal reflectors and connected to antenna in parallel. ^ EFFECT: increases reflection factor of surface acoustic waves from reflecting IDT in different acoustic channels. ^ 2 dwg