SAW SPECTRAL LIMITER FOR NARROW BAND INTERFERENCE SUPPRESSION

MANY WIDEBAND COMMUNICATIONS, RADAR AND EW RECEIVERS COULD BENEFIT FROM A SIMPLE MEANS OF NARROW BAND (IE AN ORDER OF MAGNITUDE LESS THAN THE DESIRED SIGNAL'S SPECTRAL BANDWIDTH) INTERFERENCE SUPPRESSION. SURFACE ACOUSTIC WAVES (SAW) OFFER SUCH A CAPABILITY BECAUSE THEY CAN: 1. SORT FREQUENCIES INTO MULTIPLE SPATIAL CHANNELS, AND 2. INDEPENDENTLY SATURATE ANY CHANNEL IN THE PRESENCE OF A LARGE SIGNAL. THE DEVICE IS MONOLITHIC, SIMPLE, SMALL, PASSIVE, 2-PORT, AND POTENTIALLY LOW COST. PHONON PROPOSES TO BUILD A SAW SPECTRAL LIMITER ON LITHIUM NIOBATE USING LOWLOSS TRANSDUCERS WITH 300 MHZ CENTER FREQUENCY, 75 MHZ BANDWIDTH, AT LEAST 10 EFFECTIVE LIMITING SUB-CHANNELS, AND AT LEAST 10 DB OF INTERFERENCE SUPPRESSION. NOTE THAT SUPPRESSION CAN BE MULTIPLIED BY CASCADING DEVICES. THRU ANALYSIS AND DEVICE EXPERIMENTATION, PHONON WILL STUDY THE MAXIMIZATION OF SUPPRESSION. PHONON WILL DELIVER TWO PROTOTYPES.