Title :
Surface-wave delay lines with near-octave bandwidth
Author :
Reeder, T.M. ; Adams, P.L.
Author_Institution :
Stanford University, W. W. Hansen Laboratories of Physics, Stanford, USA
Abstract :
Efficient operation of lithium-niobate delay lines over bandwidths approaching one octave is reported. The transducers are of a 3-electrode (N = 1) interdigital design. Broad bandwidth to the series-resonant transducer is obtained by the use of a lumped-element impedance invertor coupling network. A 9.1 ¿s delay line is described, which gives 55% 3 dB bandwidth centred at 235 MHz with 25 dB minimum loss and over 50 dB minimum triple-transit suppression.
Keywords :
surface phenomena; ultrasonic delay lines; ultrasonic transducers; lithium niobate; lumped element impedance invertor coupling network; near octave bandwidth; surface wave delay line; ultrasonic transducer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19710385
