TY - GEN
T1 - A π-type Isolation Network for Improvement of Matching and Isolation in Reconfigurable Multifunctional Bandpass Filter
AU - Zhu, Xu
AU - Yang, Tao
AU - Chi, Pei Ling
AU - Xu, Ruimin
N1 - Publisher Copyright:
© 2019 European Microwave Association (EuMA).
PY - 2019/10
Y1 - 2019/10
N2 - In this paper, a method for improving the output impedance match and isolation between output ports of the reconfigurable single-to-balanced (SE-BAL), power-dividing (PD) and single-ended (SE) multifunctional filter is presented. By adding the varactor-tuned π-type isolation network to the outputs of the tunable multifunctional filter, both the matching and isolation at the output ports are improved to a large degree over the full tuning range. Compared to the original standalone multifunctional filter, the measured output return loss and isolation of the filter with π-type isolation network are improved by more than 10 dB at center frequency of each tuning state under the SE-BAL and PD filtering mode, while the measured output return loss and isolation for the SE filtering mode still keeps better than -20 dB in the whole tuning range.
AB - In this paper, a method for improving the output impedance match and isolation between output ports of the reconfigurable single-to-balanced (SE-BAL), power-dividing (PD) and single-ended (SE) multifunctional filter is presented. By adding the varactor-tuned π-type isolation network to the outputs of the tunable multifunctional filter, both the matching and isolation at the output ports are improved to a large degree over the full tuning range. Compared to the original standalone multifunctional filter, the measured output return loss and isolation of the filter with π-type isolation network are improved by more than 10 dB at center frequency of each tuning state under the SE-BAL and PD filtering mode, while the measured output return loss and isolation for the SE filtering mode still keeps better than -20 dB in the whole tuning range.
KW - filtering power divider
KW - isolation network
KW - reconfigurable filter
KW - single-ended filter
KW - single-to-balanced filter
UR - http://www.scopus.com/inward/record.url?scp=85076340648&partnerID=8YFLogxK
U2 - 10.23919/EuMC.2019.8910785
DO - 10.23919/EuMC.2019.8910785
M3 - Conference contribution
AN - SCOPUS:85076340648
T3 - 2019 49th European Microwave Conference, EuMC 2019
SP - 125
EP - 128
BT - 2019 49th European Microwave Conference, EuMC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 49th European Microwave Conference, EuMC 2019
Y2 - 1 October 2019 through 3 October 2019
ER -