SU1136309A1 - Dispersion delay line based on acoustic surface waves - Google Patents

Abstract

1. DISPERSION LINE OF DELAY ON SURFACE ACOUSTIC WAVES (SAW), containing a piezoelectric acoustic duct, on the surface; which, in parallel acoustic channels, are the input and output interdigital transducers (IDT) and n reflective structures (wasps) with uneven pitch of elements in them, located one below the other on one side of the input and output B1Sh, about m and so that, in order to increase the degree of integration, n-1 reversible SAW communication elements are inserted into it, located on the acoustic duct between the input and output LIRs in the corresponding n-1 parallel acoustic channels adjacent, OS. 9

Description

WITH

9

: o; o

2. Line according to claim. It differs from the fact that each OS is released;

Nena in the form of two herringbone reflective gratings.

 The invention relates to acoustoelectronics, in particular to the dispersion lines of the delay of radio frequency signals on surface acoustic waves, and can be used in electronic devices for processing analog signals. The dispersion delay line (D113) on surface acoustic waves (1IAB) is known, which contains a piezoelectric acoustic conduit with input channels arranged on its surface in parallel acoustic channels. and output interdigital transducers (VS11) and a reflective structure (wasps), made in the form of two reflective gratings with an uneven pitch element in them forming a herringbone-type OS. The disadvantage of this D) 13 is the limited duration of the processed signals, equal to twice the acoustic length of one reflector. Closest to the invention, the PR of the technical nature is D) 13 at IIAB, containing a piezoelectric acoustic duct, on the surface of which in parallel acoustic channels are located the input and output HS11, n reflective structures with uneven pitch of elements in them, and n multiband taps (No. 10 ) placed in acoustic channels correspondingly. z reflective structures. This p-cascade LLL provides the ability to process or generate signals of duration iZT, where T is the acoustic length of one OS. The disadvantage of the known DLZ on IIAB is the low degree of integration, due to the need to place reflective structures both on one and on the other side of BUIil, which is accompanied by additional distortions of the amplitude-frequency and impulse characteristics of the DLZ. The purpose of the invention is to increase the degree of integration of the DLZ. The goal is achieved by the fact that in DLZ on 11AB, containing a piezoelectric acoustic duct, on the surface of which, in parallel, acoustic channels, are the input and output LSIs and OS, with non-uniform elements in them located one below the other on one side of input and output IDT, n-1 reversible communication elements (RES) of surfactants are placed on the duct between the input and outputs of the loudspeakers in the corresponding n-parallel acoustic channels adjacent to the IRI; each OS is made in the form of two reflective herringbone-type lattices. The figure shows the dispersion delay line on the surfactant. The SAW on the SAW contains a piezoelectric acoustic duct 1, an input 2 and an output 3 LISH located on the surface of the acoustic duct in parallel acoustic channels, n OS 4, each of which is made in the form of two reflective gratings 5 and 6 of the herringbone type with uneven pitch of elements in them, All OSs are located on one side of the input and output VS, n-1 RES surfactant 7, located between the input and output LSI in the corresponding p-1 parallel acoustic channels of adjacent OS, each of the RES surfactant 7 consists of MIO 8 and two multibandi-shaped reflectors 9 and 10, placed one relative to the other mirror symmetrically. At the ends of the duct can be applied absorbent coating 11. D113 on the surfactant works as follows.

31

The input LSI 2, when an electric signal is applied to it, excites the IIAB, propagating along the sound duct 1 in the direction of OS 4.. This I1AB, successively reflecting from the two OS forming reflector gratings 5 and 6, hits the RES 7, which repeats IIAB from channel A channel B. Indeed, the surfactant reflected by reflective arrays 5 and 6 falls on the pole A M1GO 8, which equally distributes the energy IIAB between two adjacent acoustic channels A and B as a result of both parts of the surfactant beam fall on the I-shaped reflectors 9 and 10 respectively that reflect the energy of the surfactant is about-1 to the MPO. 8, and the latter combines the energy of both beams into one beam, propagating already in channel B in the direction of OS 4. Next, the described process is repeated in the next stage of DG13.

094

In this case, since the duration of processing or the formation of a signal in one stage is 2T, where T is the acoustic length of one OS, then

The total duration of processing or signal formation in DOS containing p cascades is 2pT, as in the known DLS, at the same time because of the possibility of placing all OS on one side of the input and output IDT, this DLL on the surfactant is characterized by a higher degree of integration compared to the known DPS.

In addition, due to the full acoustic isolation of neighboring channels, 4 € tMy contributes to the performance of each OS in the form of two reflective gratings / type of fir tree, this DL31 on SAW is characterized by a reduced level of distortion of the amplitude-frequency and impulse characteristics.

Claims (2)

1. DISPERSION LINE OF DELAY ON SURFACE ACOUSTIC WAVES (SAW) containing a piezo. electric duct, on top; of which in parallel acoustic channels the input and output interdigital transducers (IDTs) and η reflective structures (OS) are located with an uneven pitch of elements located in them, located one below the other on the same side of the input and output IDTs, “and -” characterized in that, in order to increase the degree of integration, p-1 reverse SAW communication elements are introduced into it, located on the sound duct between the input and output IDTs in the corresponding p-1 parallel acoustic channels adjacent. OS S. /// I, 1 1 | b? B i Τ ’ U / / U-U / '/ U -D-1 1 ⁵ ... d I 2. The line according to π.1, with the result of which, each OS is not in the form of two herringbone-type reflective gratings.