16-CHANNEL SURFACE-ACOUSTIC-WAVE GRATING-FILTER BANK FOR REAL TIME SPECTRAL ANALYSER

摘要

A 16-channel surface-acoustic-wave grating-filter bank has been constructed on four y-cut LiNbO3 crystals. Each channel has a 4 dB bandwidth of 6.7 MHz. The insertion loss at the peak of the passband of each channel is -32 dB, + or - 1.2 dB. The centre frequencies are 6.7 MHz apart and span the range 150-250 MHz. This filter has been incorporated in a real-time spectral analyser. (Author)