Title :
CAD of precise SAW convolvers with high relative bandwidth
Author :
Grassl, H.P. ; Reindl, Leonhard ; W¿¿rz, H.W. ; Ruile, Werner
Author_Institution :
Siemens AG, Mÿnchen, West Germany
Abstract :
A CAD procedure for optimisation of SAW convolvers with narrow-aperture focusing chirp transducers including fully planar matching networks is demonstrated. A new finger arrangement to suppress internal reflections in broadband chirp transducers has been devised. As an example, 160 MHz bandwidth centred at 350MHz with 17.5¿s delay line length was realised with an efficiency of ¿63dBm, flat to ±0.8dB and phase-linear to ±6°.
Keywords :
CAD; signal processing; surface acoustic wave devices; 160 MHz; 17.5 mus; 350 MHz; CAD procedure; SAW convolvers; broadband chirp transducers; delay line length; finger arrangement; fully planar matching networks; high relative bandwidth; narrow-aperture focusing chirp transducers; optimisation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19860884
