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The need of fabricating Surface Acoustic Wave (SAW) devices with an accurate frequency definition has lead SAW devices manufacturers to develop trimming processes. A current approach of trimming process widely used to decrease the frequency of SAW devices consists in etching the substrate between electrodes using an appropriate plasma. According to this principle, we have developed such a process...
Radar and communications systems require frequency references with ultimate noise performance with the aim of improving the sensitivity of the advanced devices. In order to achieve a very low noise floor combined with a high level output, AR-Electronique has studied and developed a new filter generation. In this paper, we present a specific filter design using monolithic crystal resonators technology...
Some phase noise benches used and developed by different research and commercial laboratories have to be tested. The problem is not to compare the performances of several oscillators, but to compare and to make an evaluation of the uncertainties, and of course, to compare the resolution and the reproducibility of the measurements, which are of interest for manufacturers. This comparison allows us...
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