Title :
True quadrature taps for s.a.w. delay lines
Author :
Murray, R.J. ; Peach, R.C. ; Neylon, S.
Author_Institution :
General Electric Company Ltd., Hirst Research Centre, Wembley, UK
Abstract :
A novel technique is described in which a combination of geometrically symmetric and antisymmetric interdigital transducers may be employed to produce a constant 90° phase difference between two taps on a surface-acoustic-wave delay line. This relative phase difference is maintained at 90° over the whole transducer bandwidth.
Keywords :
surface acoustic wave devices; ultrasonic delay lines; ultrasonic transducers; antisymmetric interdigital transducers; geometrically symmetric interdigital transducers; surface acoustic wave delay lines; true quadrature taps;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780424
