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- W3041902509 abstract "Acoustic-wave lumped-element resonator (AWLR)based filters with reconfigurable all-pass-to-bandstop transfer function are reported. They are based on in-series cascaded resonant stages that comprise two parallel RF signal paths, namely: 1) a thru-line and 2) an AWLR-based resonant section. Reconfigurability is achieved by altering the phase of the thruline through varactors. In this manner, the filter response can be reconfigured from an all-pass to an enhanced fractional bandwidth (FBW)-i.e., wider than the electromechanical coupling coefficient k <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>t</sub> <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> -bandstop one. For practical validation, two prototypes were designed and tested. They include 1) a single-stage prototype with insertion loss (IL) <; 0.38 dB in the all-pass mode and a bandstop mode with a center frequency of 917.5 MHz, an FBW of 0.29% (2.4 k <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>t</sub> <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> ), and a stopband isolation of 21.2 dB and 2) a two-stage prototype that exhibits an all-pass mode with IL <; 0.67 dB and a bandstop mode centered at 916.9 MHz, with an FBW of 0.47% (3.8 k <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>v</sub> <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> ) and a tunable isolation between 20 and 43 dB." @default.
- W3041902509 created "2020-07-16" @default.
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- W3041902509 date "2020-08-01" @default.
- W3041902509 modified "2023-09-23" @default.
- W3041902509 title "Reconfigurable All-Pass-to-Bandstop Acoustic-Wave-Lumped-Element Resonator Filters" @default.
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- W3041902509 doi "https://doi.org/10.1109/lmwc.2020.3004028" @default.
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