Bartlett apodization on thin-film LiTaO3 SH-SAW resonators raises Q from 688 to 1522, enabling a 4.3 GHz third-order ladder filter with 1.59 dB insertion loss, 3.24% FBW, and >14 dB out-of-band rejection in 0.4 mm².
Practical demonstrations of FR3-band thin-film lithium niobate acoustic filter design
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Q-Enhanced SH-SAW Ladder Filter in Thin-Film Lithium Tantalate Using Bartlett Apodization
Bartlett apodization on thin-film LiTaO3 SH-SAW resonators raises Q from 688 to 1522, enabling a 4.3 GHz third-order ladder filter with 1.59 dB insertion loss, 3.24% FBW, and >14 dB out-of-band rejection in 0.4 mm².