TY - GEN
T1 - A 1.32 to 1.89 GHz Diplexer/Filtering-Switch for Reconfigurable FDD/TDD Operations
AU - Wei, Zhihua
AU - Ning, Yuhang
AU - Chi, Pei Ling
AU - Xu, Ruimin
AU - Yang, Tao
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Time division duplexing (TDD) and frequency division duplexing (FDD) are two typical duplexing techniques in modern wireless systems. Adopting appropriate duplexing mode in specific scenarios can effectively improve the communication efficiency. In this paper, a novel reconfigurable diplexer/filtering-switch (RDFS) for reconfigurable TDD/FDD operations is presented. It is constructed by seven varactor loaded half-wavelength microstrip resonators. Common resonator technique is adopted to divide the seven resonators into two signal channels, while the controllable mixed electromagnetic coupling (CMEC) technique is employed for inter-stage couplings. With the proposed methods, not only the intrinsic reconfigurable diplexer and filtering-switching functions can be easily achieved, multiple transmission zeros are also introduced to improve the channel isolation in FDD operation and stopband suppression in TDD operation. A circuit prototype with a tunable center frequency covering 1.32-1.89 GHz is designed, fabricated and measured to validate the proposed method. Good agreement between the simulated and measured results can be observed.
AB - Time division duplexing (TDD) and frequency division duplexing (FDD) are two typical duplexing techniques in modern wireless systems. Adopting appropriate duplexing mode in specific scenarios can effectively improve the communication efficiency. In this paper, a novel reconfigurable diplexer/filtering-switch (RDFS) for reconfigurable TDD/FDD operations is presented. It is constructed by seven varactor loaded half-wavelength microstrip resonators. Common resonator technique is adopted to divide the seven resonators into two signal channels, while the controllable mixed electromagnetic coupling (CMEC) technique is employed for inter-stage couplings. With the proposed methods, not only the intrinsic reconfigurable diplexer and filtering-switching functions can be easily achieved, multiple transmission zeros are also introduced to improve the channel isolation in FDD operation and stopband suppression in TDD operation. A circuit prototype with a tunable center frequency covering 1.32-1.89 GHz is designed, fabricated and measured to validate the proposed method. Good agreement between the simulated and measured results can be observed.
KW - bandpass filter
KW - diplexer
KW - frequency division duplex
KW - single-pole double-throw switch
KW - time division duplex
UR - http://www.scopus.com/inward/record.url?scp=85168540463&partnerID=8YFLogxK
U2 - 10.1109/IMS37964.2023.10188013
DO - 10.1109/IMS37964.2023.10188013
M3 - Conference contribution
AN - SCOPUS:85168540463
T3 - IEEE MTT-S International Microwave Symposium Digest
SP - 839
EP - 842
BT - 2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE/MTT-S International Microwave Symposium, IMS 2023
Y2 - 11 June 2023 through 16 June 2023
ER -