Abstract: This paper reports on a 6.4-GHz spurious-free filter based on first-order symmetric (S1) mode resonator fabricated in X-cut lithium niobate (LN) thin film. Specifically, we studied the ...
Mammotion is best known for building robot lawn mowers, having only introduced its first robotic pool cleaner in July 2025, but it’s looking to shake up the market with its second effort, now on ...
The S1 heart sound happens when the tricuspid and mitral valves close. A loud S1 may mean there is a problem with the heart, like mitral stenosis or tachycardia. Mitral stenosis is when the mitral ...
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