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Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A 0.35 THz Extended Interaction Oscillator based on Overmoded and Bi-Periodic Structure
AU - Xu, Che
AU - Meng, Lin
AU - Paoloni, Claudio
AU - Qin, Yu
AU - Bin, Lianjie
AU - Wang, Bin
AU - Li, Hailong
AU - Yin, Yong
N1 - ©2021 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
PY - 2021/11/30
Y1 - 2021/11/30
N2 - An improved topology of Extended interaction oscillators (EIO) is presented with enhanced efficiency at 0.35 THz. A bi-periodic ladder-type structure is used for optimizing the performance of the TM 31−2π mode operation, based on bi-periodic interaction gaps composed of staggered short and long slots. The bi-periodic interaction mechanism permits to operate the circuit with a standing-wave field between the π and 2π modes, thus providing the potential to combine the advantages of both π and 2π modes in terms of both coupling and output performance. The resulting transverse TM 31 operating mechanism exhibits a good agreement with the bi-periodic structure in terms of coupling performance, with the short slot length positively correlated with the value of effective characteristic impedance M2R/Q . The circuit demonstrates attractive coupling and output characteristics by optimization of M2R/Q and Qe . A state-of-the-art value M2R/Q of 59.69 Ω and a moderate Qe of 2523.52 are achieved for a proposed eight-period ladder-type EIO. An RF power of 540 W is obtained with a 42.5 kV, 0.6 A sheet beam, with 2.1% electronic efficiency at 0.35 THz.
AB - An improved topology of Extended interaction oscillators (EIO) is presented with enhanced efficiency at 0.35 THz. A bi-periodic ladder-type structure is used for optimizing the performance of the TM 31−2π mode operation, based on bi-periodic interaction gaps composed of staggered short and long slots. The bi-periodic interaction mechanism permits to operate the circuit with a standing-wave field between the π and 2π modes, thus providing the potential to combine the advantages of both π and 2π modes in terms of both coupling and output performance. The resulting transverse TM 31 operating mechanism exhibits a good agreement with the bi-periodic structure in terms of coupling performance, with the short slot length positively correlated with the value of effective characteristic impedance M2R/Q . The circuit demonstrates attractive coupling and output characteristics by optimization of M2R/Q and Qe . A state-of-the-art value M2R/Q of 59.69 Ω and a moderate Qe of 2523.52 are achieved for a proposed eight-period ladder-type EIO. An RF power of 540 W is obtained with a 42.5 kV, 0.6 A sheet beam, with 2.1% electronic efficiency at 0.35 THz.
KW - Bi-periodic structure
KW - extended interaction oscillator (EIO)
KW - terahertz sources
KW - vacuum electronics
U2 - 10.1109/TED.2021.3108741
DO - 10.1109/TED.2021.3108741
M3 - Journal article
VL - 68
SP - 5814
EP - 5819
JO - IEEE Transactions on Electron Devices
JF - IEEE Transactions on Electron Devices
SN - 0018-9383
IS - 11
ER -