TY - CHAP
T1 - Input- Reflectionless Acoustic-Wave-Lumped- Element Resonator-Based Bandpass Filters
AU - Psychogiou, Dimitra
AU - Simpson, Dakotah J.
AU - Gomez-Garcia, Roberto
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/8/17
Y1 - 2018/8/17
N2 - This paper reports on an RF design methodology for acoustic-wave-resonator-(AWR)-based bandpass filters (BPFs) with input-reflectionless behavior in both their passband and stopband regions. The proposed concept is based on acoustic-wave-lumped-element resonators (AWLRs) that are incorporated in se-ries-cascaded reflectionless stages (RLSs). Each RLS comprises a first-order bandpass section-shaped by three impedance inverters and one AWLR-and a first-order resistively-terminated bandstop section-shaped by two impedance inverters and one AWLR-that are designed to exhibit complementary transfer functions. In this manner, an input-reflectionless behavior can be obtained both at the passband and stopband regions of the filter. In addition, the use of AWLRs in the RLSs facilitates the realization of high-quality-factor (pmb Q > 10,000) quasi-elliptic-type transfer functions with fractional bandwidths (FBWs) that are wider than the electromechanical coupling coefficient (k t 2) of its constituent AWRs. For proof-of-concept validation purposes, one- and two-state prototypes were manufactured, and measured at 418 MHz using commercially-available surface-acoustic-wave resonators.
AB - This paper reports on an RF design methodology for acoustic-wave-resonator-(AWR)-based bandpass filters (BPFs) with input-reflectionless behavior in both their passband and stopband regions. The proposed concept is based on acoustic-wave-lumped-element resonators (AWLRs) that are incorporated in se-ries-cascaded reflectionless stages (RLSs). Each RLS comprises a first-order bandpass section-shaped by three impedance inverters and one AWLR-and a first-order resistively-terminated bandstop section-shaped by two impedance inverters and one AWLR-that are designed to exhibit complementary transfer functions. In this manner, an input-reflectionless behavior can be obtained both at the passband and stopband regions of the filter. In addition, the use of AWLRs in the RLSs facilitates the realization of high-quality-factor (pmb Q > 10,000) quasi-elliptic-type transfer functions with fractional bandwidths (FBWs) that are wider than the electromechanical coupling coefficient (k t 2) of its constituent AWRs. For proof-of-concept validation purposes, one- and two-state prototypes were manufactured, and measured at 418 MHz using commercially-available surface-acoustic-wave resonators.
KW - Acoustic-wave (AW) filter
KW - bandpass filter (BPF)
KW - enhancement
KW - high-quality-factor (Q) filter
KW - reflectionless filter
KW - RF/microwave filter
KW - surface-acoustic-wave resonator
UR - https://www.scopus.com/pages/publications/85053046460
U2 - 10.1109/MWSYM.2018.8439676
DO - 10.1109/MWSYM.2018.8439676
M3 - Chapter
AN - SCOPUS:85053046460
SN - 9781538650677
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 852
EP - 855
BT - Proceedings of the 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE/MTT-S International Microwave Symposium, IMS 2018
Y2 - 10 June 2018 through 15 June 2018
ER -