ArticleMicromachines2026
A Low-Loss Hybrid Acoustic Bandpass Filter with Continuously Tunable Fractional Bandwidth.
Article in Micromachines, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors.
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Abstract
This research proposes a low-loss hybrid acoustic bandpass filter with continuously tunable fractional bandwidth. A reconfigurable acoustic-wave-lumped-element resonator (AWLR) module with a varactor diode is studied. Based on the reconfigurable AWLR modules, two ladder-type tunable filters, including a single-series/single-shunt configuration (Type I) and a single-series/two-shunt configuration (Type II), are designed. Their analytical expressions are derived to directly predict their electrical characteristics. Their calculated and simulated insertion loss and 3 dB fractional bandwidth show good agreement, which validates the correctness of the theoretical analysis. The proposed two configurations of the reconfigurable AWLR-based filters are fabricated and measured. The Type I filter achieves a 3 dB fractional bandwidth tuning range from 1.16
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