x

## 留言板

Investigation on longitudinal mode selection in O-type HPM devices

## Investigation on longitudinal mode selection in O-type HPM devices

Zhang Jun, Zhong Hui-Huang
• #### Abstract

The reason of the emergence of longitudinal modes in the single-mode slow-wave structure(SWS) is analyzed in terms of the transmission line theory, which proves that the occurrence of the longitudinal modes can be attributed to the unmatchi ng between the impedance of the SWS and that of its input and output ends. With the method of S-parameter, the features, such as frequency, field distributi on and the Q-factor of the longitudinal modes of TM01 mode in the over moded SWS are investigated, and the influence of the period-number of the SWS on the number, the frequency interval and the Q-factor of longitudinal modes a re analyzed. It is proposed that the introduction of a well designed resonant ca vity to O-type HPM devices can help to achieve the longitudinal mode selection a nd reduce the period-number of the SWS, which not only can make the devices more compact, but also can avoid the destructive competition between various longitu dinal modes, therefore can enhance the efficiency and stabilize the frequency.

• Funds:

#### Cited By

•  [1] Zhang Ji-Ye, Zhang Jian-Wei, Zeng Yu-Gang, Zhang Jun, Ning Yong-Qiang, Zhang Xing, Qin Li, Liu Yun, Wang Li-Jun. Design of gain region of high-power vertical external cavity surface emitting semiconductor laser and its fabrication. Acta Physica Sinica, 2020, 69(5): 054204. doi: 10.7498/aps.69.20191787 [2] . Control of spiral waves in excitable media under polarized electric fields. Acta Physica Sinica, 2020, (): . doi: 10.7498/aps.69.20191934 [3] . The spring oscillator model degenerated into the coupled-mode theory by using secular perturbation theory. Acta Physica Sinica, 2020, (): . doi: 10.7498/aps.69.20191505 [4] Wang Jing-Li, Chen Zi-Yu, Chen He-Ming. Design of polarization-insensitive 1 × 2 multimode interference demultiplexer based on Si3N4/SiNx/Si3N4 sandwiched structure. Acta Physica Sinica, 2020, 69(5): 054206. doi: 10.7498/aps.69.20191449 [5] Bai Jia-Hao, Guo Jian-Gang. Theoretical studies on bidirectional interfacial shear stress transfer of graphene/flexible substrate composite structure. Acta Physica Sinica, 2020, 69(5): 056201. doi: 10.7498/aps.69.20191730 [6] Wang Xiao-Lei, Zhao Jie-Hui, Li Miao, Jiang Guang-Ke, Hu Xiao-Xue, Zhang Nan, Zhai Hong-Chen, Liu Wei-Wei. Tight focus and field enhancement of terahertz waves using a thickness-graded silver-plated strip probe based on spoof surface plasmons. Acta Physica Sinica, 2020, 69(5): 054201. doi: 10.7498/aps.69.20191531 [7] Liu Xiang, Mi Wen-Bo. Structure, Magnetic and Transport Properties of Fe3O4 near Verwey Transition. Acta Physica Sinica, 2020, 69(4): 040505. doi: 10.7498/aps.69.20191763 [8] . The physics-based model of AlGaN/GaN high electron mobility transistor outer fringing capacitances. Acta Physica Sinica, 2020, (): . doi: 10.7498/aps.69.20191931 [9] Ren Xian-Li, Zhang Wei-Wei, Wu Xiao-Yong, Wu Lu, Wang Yue-Xia. Prediction of short range order in high-entropy alloys and its effect on the electronic, magnetic and mechanical properties. Acta Physica Sinica, 2020, 69(4): 046102. doi: 10.7498/aps.69.20191671 [10] . Effect of Swift Heavy Ions Irradiation on the Microstructure and Current-Carrying Capability in YBa2Cu3O7-δ High Temperature Superconductor Films. Acta Physica Sinica, 2020, (): . doi: 10.7498/aps.69.20191914 [11] Hu Yao-Hua, Liu Yan, Mu Ge, Qin Qi, Tan Zhong-Wei, Wang Mu-Guang, Yan Feng-Ping. Application of compressive sensing based on multimode fiber specklegram in optical image encryption. Acta Physica Sinica, 2020, 69(3): 034203. doi: 10.7498/aps.69.20191143 [12] . Research on few-mode PAM regenerator based on nonlinear optical fiber loop mirror. Acta Physica Sinica, 2020, (): . doi: 10.7498/aps.69.20191858 [13] Huang Yong-Feng, Cao Huai-Xin, Wang Wen-Hua. Conjugate linear symmetry and its application to \begin{document}${\mathcal{P}}{\mathcal{T}}$\end{document}-symmetry quantum theory. Acta Physica Sinica, 2020, 69(3): 030301. doi: 10.7498/aps.69.20191173 [14] Dong Zheng-Qiong, Zhao Hang, Zhu Jin-Long, Shi Ya-Ting. Influence of incident illumination on optical scattering measurement of typical photoresist nanostructure. Acta Physica Sinica, 2020, 69(3): 030601. doi: 10.7498/aps.69.20191525 [15] . Molecular dynamics study on structural characteristics of Lennard-Jones supercritical fluids. Acta Physica Sinica, 2020, (): . doi: 10.7498/aps.69.20191591 [16] Zhao Jian-Ning, Liu Dong-Huan, Wei Dong, Shang Xin-Chun. Thermal rectification mechanism of one-dimensional composite structure with interface thermal contact resistance. Acta Physica Sinica, 2020, 69(5): 056501. doi: 10.7498/aps.69.20191409 [17] Fang Wen-Yu, Zhang Peng-Cheng, Zhao Jun, Kang Wen-Bin. Electronic structure and photocatalytic properties of H, F modified two-dimensional GeTe. Acta Physica Sinica, 2020, 69(5): 056301. doi: 10.7498/aps.69.20191391 [18] Liao Tian-Jun, Lü Yi-Xiang. Thermodynamic limit and optimal performance prediction of thermophotovoltaic energy conversion devices. Acta Physica Sinica, 2020, 69(5): 057202. doi: 10.7498/aps.69.20191835 [19] Luo Duan, Hui Dan-Dan, Wen Wen-Long, Li Li-Li, Xin Li-Wei, Zhong Zi-Yuan, Ji Chao, Chen Ping, He Kai, Wang Xing, Tian Jin-Shou. Design of femtosecond electron diffractometer with adjustable gap. Acta Physica Sinica, 2020, 69(5): 052901. doi: 10.7498/aps.69.20191157 [20] Zhao Chao-Ying, Fan Yu-Ting, Meng Yi-Chao, Guo Qi-Zhi, Tan Wei-Han. Orbital angular momentum mode of cylindrical spiral wave-guide. Acta Physica Sinica, 2020, 69(5): 054207. doi: 10.7498/aps.69.20190997
•  Citation:
##### Metrics
• Abstract views:  2768
• Cited By: 0
##### Publishing process
• Received Date:  19 December 2003
• Accepted Date:  11 February 2004
• Published Online:  19 January 2005

## Investigation on longitudinal mode selection in O-type HPM devices

• 1. 国防科技大学光电科学与工程学院，长沙 410073

Abstract: The reason of the emergence of longitudinal modes in the single-mode slow-wave structure(SWS) is analyzed in terms of the transmission line theory, which proves that the occurrence of the longitudinal modes can be attributed to the unmatchi ng between the impedance of the SWS and that of its input and output ends. With the method of S-parameter, the features, such as frequency, field distributi on and the Q-factor of the longitudinal modes of TM01 mode in the over moded SWS are investigated, and the influence of the period-number of the SWS on the number, the frequency interval and the Q-factor of longitudinal modes a re analyzed. It is proposed that the introduction of a well designed resonant ca vity to O-type HPM devices can help to achieve the longitudinal mode selection a nd reduce the period-number of the SWS, which not only can make the devices more compact, but also can avoid the destructive competition between various longitu dinal modes, therefore can enhance the efficiency and stabilize the frequency.

/