Wideband Microwave Acoustic Delay Line with Exceptionally Smooth Phase and Loss Response

Design techniques for high performance microwave delay lines which have superior bandwidth, phase linearity and spurious echo characteristics are presented. Utilization of these techniques to realize a 4 /spl mu/s L-band unit which has insertion loss of 30 /spl plusmn/0.5 dB over the 500 MHz band centered at 1.7 GHz, with triple-transit suppression greater than 45 dB and phase deviation from linearity of less than /spl plusmn/2.5/spl deg/, are described.