TY - CHAP
T1 - Acoustic-wave-lumped-element resonator (AWLR) architectures for high-Q reflective bandstop filters
AU - Psychogiou, Dimitra
AU - Gomez-Garcia, Roberto
AU - Peroulis, Dimitrios
N1 - Publisher Copyright:
© 2015 EuMA.
PY - 2015/12/2
Y1 - 2015/12/2
N2 - The RF design of a new family of reflective-Type bandstop filters (BSFs) with small form factor, narrow bandwidth (BW) and large stopband attenuation is presented in this paper. The proposed filter geometries are based on mixed acoustic-wave-lumped-element resonator (AWLR) architectures that are effectively combined with lumped-element impedance inverters. Contrary to conventional all-AW filter topologies, the achieved stopband BW is no longer limited by the electromechanical coupling coefficient (kt2) of the acoustic wave (AW) resonator. Furthermore, their resulting stopbands exhibit effective quality factors (Qseff) that are at least 50 times higher than in traditional lumped-element filters. First-and second-order BSF prototypes that consist of commercially-Available surface acoustic wave (SAW) resonators and surface mounted devices (SMDs) have been designed, built and measured at 418 MHz. Measured stopbands with 3dB-BWs between 0.25 MHz and 0.72 MHz, maximum stopband attenuation ranging from 20 to 30 dB, and passband loss between 0.4 and 1 dB are presented as proof-of-concept demonstrators.
AB - The RF design of a new family of reflective-Type bandstop filters (BSFs) with small form factor, narrow bandwidth (BW) and large stopband attenuation is presented in this paper. The proposed filter geometries are based on mixed acoustic-wave-lumped-element resonator (AWLR) architectures that are effectively combined with lumped-element impedance inverters. Contrary to conventional all-AW filter topologies, the achieved stopband BW is no longer limited by the electromechanical coupling coefficient (kt2) of the acoustic wave (AW) resonator. Furthermore, their resulting stopbands exhibit effective quality factors (Qseff) that are at least 50 times higher than in traditional lumped-element filters. First-and second-order BSF prototypes that consist of commercially-Available surface acoustic wave (SAW) resonators and surface mounted devices (SMDs) have been designed, built and measured at 418 MHz. Measured stopbands with 3dB-BWs between 0.25 MHz and 0.72 MHz, maximum stopband attenuation ranging from 20 to 30 dB, and passband loss between 0.4 and 1 dB are presented as proof-of-concept demonstrators.
KW - Acoustic wave (AW) filter
KW - attenuation
KW - bandstop filter (BSF)
KW - compact filter
KW - high-quality-factor (Q) filter
KW - large-Attenuation filter
KW - narrowband filter
KW - notch filter
UR - https://www.scopus.com/pages/publications/84964319798
U2 - 10.1109/EuMC.2015.7345790
DO - 10.1109/EuMC.2015.7345790
M3 - Chapter
AN - SCOPUS:84964319798
T3 - European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC
SP - 422
EP - 425
BT - European Microwave Week 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 45th European Microwave Conference, EuMC 2015
Y2 - 7 September 2015 through 10 September 2015
ER -