COMPONENT OF SURFACE WAVES THAT CAN BE CONSULTED BY RADIO WITH OPTIMAL CODE DISTANCING.

摘要

Component of surface waves (1) coded, intended for a radio consultation system with identification tag (ID) (S, E, 1), with a substrate plate (10), with piezoelectric property of the material on its surface ( 11), with at least one electroacoustic transducer (12), comprising an interdigital structure that is located on the surface (11) of the platelet of the substrate (10), which is used for the generation of an acoustic surface wave (15) on the surface (11) with a direction of main propagation of the waves (115) determined by this structure, and with a reflector structure (20), comprising respective reflectors (21 '') as code elements (21), which are spaced apart in this direction of wave propagation (115) on this surface (11) of the substrate plate (10), characterized in that for the placement of the reflectors (21 '') at the correct distances a pos matrix ions (30 ¿) with basic values (130) at equal distances from each other, which is aligned in the direction of the main propagation of the waves (115) and in which the measure of the distance of the matrix (t) is sized according to the path, which travels the acoustic surface wave (15) within the predetermined period of time (0, 5, 0, 33 ... s) through the inaccuracy of the time-dimensioned measurement () of the system (S, E, 1), and because from these basic values (130) of this position matrix (30), the only basic values that are occupied with the reflectors as distributed positions corresponding to the respective code, are those in which the distances between adjacent reflectors they are always at least of equal magnitude as the resolution of the structure (t) (1 s) given across the frequency bandwidth of the system.