At present the manufacture of surface acoustic wave use the technology of the final submicron . a series of the devices of low insertion loss , high q saw rayleigh surface acoustic wave resonators or stws that insertion loss has less than 5db , load quality factor ( ql ) is more than 1000 on the quartz piezoelectric with zero of first temperature factor in the research . these difference frequencies are 60mhz , 280mhz , 739mhz and 1ghz of normal frequency and at also surface acoustic wave . using 1 . 25db noise factor amplifier , careful design curcuit , good setting printed curcuit board , and using the 1ghz surface transverse wave resonator as frequency element , researching the low phase noise surface acoustic wave with sideband phase noise near ? 120dbc / hz deviating 1khz on carrier , spurious suppress with 80db
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