TY - CHAP
T1 - Fully-reconfigurable bandpass filter with static couplings and intrinsic-switching capabilities
AU - Gomez-Garcia, Roberto
AU - Munoz-Ferreras, Jose Maria
AU - Psychogiou, Dimitra
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/10/4
Y1 - 2017/10/4
N2 - A transfer-function-adaptive quasi-elliptic-type microwave bandpass filter is presented. The devised fully-reconfigurable filter is based on a resonator-cascade structure with static impedance inverters and only exploits the tuning of its resonating nodes to achieve all its reconfiguration properties. They include center-frequency, bandwidth, and transmission-zero (TZ) control for bandpass-type responses, as well as the intrinsic switching-off - i.e., without RF switches - of the filter. Moreover, it features less in-band insertion-loss levels and improved linearity behavior - specially for narrow-band states - when compared to more-classic bandwidth-tunable filters that use inter-resonator coupling variation. The operational foundations of the engineered fully-reconfigurable filter architecture are theoretically expounded in a coupling-matrix framework. Besides, a tunable three-pole microstrip filter prototype in the range 1.2-1.7 GHz is developed and tested for experimental-demonstration purposes.
AB - A transfer-function-adaptive quasi-elliptic-type microwave bandpass filter is presented. The devised fully-reconfigurable filter is based on a resonator-cascade structure with static impedance inverters and only exploits the tuning of its resonating nodes to achieve all its reconfiguration properties. They include center-frequency, bandwidth, and transmission-zero (TZ) control for bandpass-type responses, as well as the intrinsic switching-off - i.e., without RF switches - of the filter. Moreover, it features less in-band insertion-loss levels and improved linearity behavior - specially for narrow-band states - when compared to more-classic bandwidth-tunable filters that use inter-resonator coupling variation. The operational foundations of the engineered fully-reconfigurable filter architecture are theoretically expounded in a coupling-matrix framework. Besides, a tunable three-pole microstrip filter prototype in the range 1.2-1.7 GHz is developed and tested for experimental-demonstration purposes.
KW - Bandpass filter
KW - Microstrip filter
KW - Planar filter
KW - Reconfigurable filter
KW - Transmission zero (TZ)
KW - Tunable filter
UR - https://www.scopus.com/pages/publications/85032472469
U2 - 10.1109/MWSYM.2017.8058734
DO - 10.1109/MWSYM.2017.8058734
M3 - Chapter
AN - SCOPUS:85032472469
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 914
EP - 917
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 -