TY - GEN
T1 - High-Order Input-Reflectionless Quasi-Elliptic-Type Wideband Bandpass Filter Using Dual-Mode Slotline Resonator
AU - Yang, Li
AU - Psychogiou, Dimitra
AU - Gomez-Garcia, Roberto
N1 - Publisher Copyright:
© 2022 The Institute of Electronics Information and Communication Engineers (IEICE) of Japan.
PY - 2022
Y1 - 2022
N2 - A high-order input-reflectionless quasi-elliptic-type wideband bandpass filter (BPF) that exploits a complementary-diplexer-based topology is reported. Firstly, a fourth-order wideband microstrip-to-microstrip vertical transition employing a dual-mode slotline resonator as the reflective-type BPF channel is designed. It features a sharp-rejection BPF response with two close-to-passband transmission zeros (TZs). To attain broadband input-reflectionless behavior, a shunt resistively-terminated microstrip p-shape network is used as the absorptive bandstop-filter (BSF) channel. The RF theoretical operational principle of the conceived broadband BPF is detailed. Compared to prior-art high-order input-/two-port-reflectionless wideband BPFs, the proposed BPF features not only improved passband flatness at the passband edges, but also relatively-high stopband power-attenuation levels and power-absorption ratios. For experimental-validation purposes, a two-layer fourth-order BPF microstrip prototype centered at 1 GHz is developed and tested.
AB - A high-order input-reflectionless quasi-elliptic-type wideband bandpass filter (BPF) that exploits a complementary-diplexer-based topology is reported. Firstly, a fourth-order wideband microstrip-to-microstrip vertical transition employing a dual-mode slotline resonator as the reflective-type BPF channel is designed. It features a sharp-rejection BPF response with two close-to-passband transmission zeros (TZs). To attain broadband input-reflectionless behavior, a shunt resistively-terminated microstrip p-shape network is used as the absorptive bandstop-filter (BSF) channel. The RF theoretical operational principle of the conceived broadband BPF is detailed. Compared to prior-art high-order input-/two-port-reflectionless wideband BPFs, the proposed BPF features not only improved passband flatness at the passband edges, but also relatively-high stopband power-attenuation levels and power-absorption ratios. For experimental-validation purposes, a two-layer fourth-order BPF microstrip prototype centered at 1 GHz is developed and tested.
KW - Absorptive filter
KW - bandpass filter (BPF)
KW - reflectionles filter
KW - two-layer structure
KW - wideband filter
UR - https://www.scopus.com/pages/publications/85146730212
M3 - Conference proceeding
AN - SCOPUS:85146730212
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 455
EP - 457
BT - 2022 Asia-Pacific Microwave Conference, APMC 2022 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 Asia-Pacific Microwave Conference, APMC 2022
Y2 - 29 November 2022 through 2 December 2022
ER -