TY - GEN
T1 - RF design of acoustic-wave-lumped-element-resonator-(AWLR)-based bandpass filters with constant in-band group delay
AU - Psychogiou, Dimitra
AU - Gomez-Garda, Roberto
AU - Peroulis, Dimitrios
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/10/4
Y1 - 2017/10/4
N2 - This papers reports on the design of a new class of acoustic-wave-resonator-(AWR)-based bandpass filters (BPFs). Unlike conventional ladder- and lattice-type AWR architectures, it allows the realization of passbands with constant group delay (Tg) and larger bandwidth (BW). The devised configuration makes use of N identical hybrid acoustic-wave lumped-element resonators (AWLRs) - each of them contributing to one pole and two transmission zeros (TZs) - and N+1 lumped-element impedance inverters. As an added benefit, it exhibits power transmission response whose maximum realizable BW and Tg flatness does not depend on the electromechanical coupling coefficient (kt2) of its constituent AWRs. For experimental-demonstration purposes, a UHF-band three-pole/six-TZ BPF prototype with in-band linear phase was designed, manufactured, and measured using commercially-available surface-acoustic-wave (SAW) resonators. Its measured characteristics are summarized as: BW of 0.3 MHz, insertion- and return-loss of 2.1 dB and 32 dB, respectively, effective quality factor Qeff of 9,000, and in-band Tg between 1.78 ± 0.02 ps.
AB - This papers reports on the design of a new class of acoustic-wave-resonator-(AWR)-based bandpass filters (BPFs). Unlike conventional ladder- and lattice-type AWR architectures, it allows the realization of passbands with constant group delay (Tg) and larger bandwidth (BW). The devised configuration makes use of N identical hybrid acoustic-wave lumped-element resonators (AWLRs) - each of them contributing to one pole and two transmission zeros (TZs) - and N+1 lumped-element impedance inverters. As an added benefit, it exhibits power transmission response whose maximum realizable BW and Tg flatness does not depend on the electromechanical coupling coefficient (kt2) of its constituent AWRs. For experimental-demonstration purposes, a UHF-band three-pole/six-TZ BPF prototype with in-band linear phase was designed, manufactured, and measured using commercially-available surface-acoustic-wave (SAW) resonators. Its measured characteristics are summarized as: BW of 0.3 MHz, insertion- and return-loss of 2.1 dB and 32 dB, respectively, effective quality factor Qeff of 9,000, and in-band Tg between 1.78 ± 0.02 ps.
KW - Acoustic-wave (AW) filter
KW - Bandpass filter (BPF)
KW - Constant group delay
KW - Flat group delay
KW - Kt enhancement
KW - RF/microwave filter
KW - Surface acoustic-wave (SAW) resonator
UR - https://www.scopus.com/pages/publications/85032506811
U2 - 10.1109/MWSYM.2017.8058899
DO - 10.1109/MWSYM.2017.8058899
M3 - Conference proceeding
AN - SCOPUS:85032506811
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 1472
EP - 1475
BT - 2017 IEEE MTT-S International Microwave Symposium, IMS 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE MTT-S International Microwave Symposium, IMS 2017
Y2 - 4 June 2017 through 9 June 2017
ER -