SAW-Based (Surface-Acoustic-Wave-Based) 100MHz-Bandwidth Adaptive Filter

摘要

We report the design and operation of a wideband adaptive filter which uses a 350-tap SAW/FET programmable transversal filter. The SAW/FET device incorporates surface-acoustic-wave (SAW) signal propagation in conjunction with a field-effect-transistor (FET)-controlled sampling array. The adaptive processor uses a digital computer to calculate the tap-weight updates and achieves up to 25 dB of adaptive CW cancellation.