TY - CHAP
T1 - Bandwidth enlargement in acoustic-wave RF bandpass filters with planar transversal circuits
AU - Gomez-Garcia, Roberto
AU - Psychogiou, Dimitra
AU - Loeches-Sanchez, Raul
AU - Peroulis, Dimitrios
N1 - Publisher Copyright:
© 2015 EuMA.
PY - 2015/12/2
Y1 - 2015/12/2
N2 - A straightforward technique to increase the bandwidth of narrow-band frequency-selective circuits for its exploitation in surface-Acoustic-wave (SAW) RF bandpass filters (BPFs) is presented. It is based on inserting the narrow-band circuit in a two-path transversal filtering section (TFS) so that its transmission band is enlarged by means of constructive signal-energy interactions. Out-of-band transmission zeros (TZs) can also be produced through destructive signal-interference phenomena for high-selectivity BPF development with multi-TFS-cascaded design strategies. The proposed bandwidth-enlargement procedure can be either applied to complete BPFs or single resonators as it is theoretically proven through two ideally synthesized examples. Furthermore, its experimental usefulness is verified with the manufacturing and characterization of a two-stage mixed-Technology SAW/microstrip BPF prototype at 890 MHz. This circuit shows a passband-width of ≈ 5× broader than that of its embedded on-chip SAW BPF (i.e., ≈ 3× wider than the kt2 of the constituent SAW resonator), while offering physical-size-reduction, passband-insertion-loss, and stopband-bandwidth advantages in relation to its conventional signal-interference planar filter counterpart.
AB - A straightforward technique to increase the bandwidth of narrow-band frequency-selective circuits for its exploitation in surface-Acoustic-wave (SAW) RF bandpass filters (BPFs) is presented. It is based on inserting the narrow-band circuit in a two-path transversal filtering section (TFS) so that its transmission band is enlarged by means of constructive signal-energy interactions. Out-of-band transmission zeros (TZs) can also be produced through destructive signal-interference phenomena for high-selectivity BPF development with multi-TFS-cascaded design strategies. The proposed bandwidth-enlargement procedure can be either applied to complete BPFs or single resonators as it is theoretically proven through two ideally synthesized examples. Furthermore, its experimental usefulness is verified with the manufacturing and characterization of a two-stage mixed-Technology SAW/microstrip BPF prototype at 890 MHz. This circuit shows a passband-width of ≈ 5× broader than that of its embedded on-chip SAW BPF (i.e., ≈ 3× wider than the kt2 of the constituent SAW resonator), while offering physical-size-reduction, passband-insertion-loss, and stopband-bandwidth advantages in relation to its conventional signal-interference planar filter counterpart.
UR - https://www.scopus.com/pages/publications/84964329440
U2 - 10.1109/EuMC.2015.7345791
DO - 10.1109/EuMC.2015.7345791
M3 - Chapter
AN - SCOPUS:84964329440
T3 - European Microwave Week 2015: "Freedom Through Microwaves", EuMW 2015 - Conference Proceedings; 2015 45th European Microwave Conference Proceedings, EuMC
SP - 426
EP - 429
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 -
