TY - JOUR
T1 - Broadband Mechanical Intermodulation Tuner Using Reconfigurable Distributed Nonlinearity
AU - Chen, Xiong
AU - Ren, Tianxiong
AU - Pommerenke, David J.
AU - Yu, Ming
PY - 2022/1/1
Y1 - 2022/1/1
N2 - A broadband intermodulation (IM) tuner using reconfigurable nonlinearity to generate tunable IM magnitude and phase reference is proposed and demonstrated in this work. The IM-tuning mechanism is based on changing the physical positions of nonlinear source in the cavity transmission field line. In this design, the high-density electromagnetic (EM) field is optimized to be focused around the center of the transmission line; by regulating the position of nonlinear reactor (NR) in this EM field, the IM phase and magnitude can all be adjusted. By tolerance design principle, the port reflection of the transmission line can always keep stable although in different NR positions. The experiment proves the IM tuning can reach more than 65 dB in magnitude and 2\pi in phase from 700 to 2700 MHz, while the minimal IM level is below -112 dBm at 2 dBm \times43 dBm and the finest IM magnitude and phase resolution reach 0.1 dB and 1°, respectively. The tunable IM reference can serve for the IM measurement on passive devices and also work as an IM calibrator and mitigator for IM test and suppression in whole S band.
AB - A broadband intermodulation (IM) tuner using reconfigurable nonlinearity to generate tunable IM magnitude and phase reference is proposed and demonstrated in this work. The IM-tuning mechanism is based on changing the physical positions of nonlinear source in the cavity transmission field line. In this design, the high-density electromagnetic (EM) field is optimized to be focused around the center of the transmission line; by regulating the position of nonlinear reactor (NR) in this EM field, the IM phase and magnitude can all be adjusted. By tolerance design principle, the port reflection of the transmission line can always keep stable although in different NR positions. The experiment proves the IM tuning can reach more than 65 dB in magnitude and 2\pi in phase from 700 to 2700 MHz, while the minimal IM level is below -112 dBm at 2 dBm \times43 dBm and the finest IM magnitude and phase resolution reach 0.1 dB and 1°, respectively. The tunable IM reference can serve for the IM measurement on passive devices and also work as an IM calibrator and mitigator for IM test and suppression in whole S band.
KW - Ferrites
KW - Impedance
KW - Intermodulation (IM) tuner
KW - Microstrip
KW - Nonlinear distortion
KW - nonlinear reactor (NR)
KW - Power transmission lines
KW - reconfigurable nonlinearity
KW - Schottky diodes
KW - tunable IM.
KW - Tuners
KW - tunable IM
UR - http://www.scopus.com/inward/record.url?scp=85112607039&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2021.3098850
DO - 10.1109/TMTT.2021.3098850
M3 - Article
AN - SCOPUS:85112607039
SN - 0018-9480
VL - 70
SP - 5
EP - 13
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 1
ER -