Scheduled System Maintenance:
On May 6th, single article purchases and IEEE account management will be unavailable from 8:00 AM - 5:00 PM ET (12:00 - 21:00 UTC). We apologize for the inconvenience.
By Topic

Theory and performance of perpendicular diffraction delay lines

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
2 Author(s)
Coquin, G.A. ; Bell Telephone Lab., Inc., Murray Hill, N.J. ; Tsu, R.

The perpendicular diffraction delay line was introduced recently as a new method for obtaining a linear variation of delay time with frequency. Basically, it consists of a transmitting array and a receiving array having elements with suitable nonuniform spacings, arranged perpendicular to each other. The dispersion arises because the effective path length of an ultrasonic beam between the input and output arrays changes with frequency. This paper presents a quantiative analysis of the perpendicular diffraction delay line together with experimental results obtained from a 2.2 Mc/s model. Also included is a complete design procedure based on interference theory. The theoretical analysis indicates that the device is capable of performing satisfactorily in any frequency range with fractional bandwidths up to 50 per cent. Measurements made on the experimental model are in good agreement with the theory.

Published in:

Proceedings of the IEEE  (Volume:53 ,  Issue: 6 )