MAGIC3D Simulations of a 500-W Ka-Band Coupled-Cavity Traveling-Wave Tube
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The 3-D particle-in-cell (PIC) simulations of a Ka-band coupled-cavity traveling-wave tube (CCTWT) are shown. The computational analysis of the Ka-band coupled-cavity slow-wave structure was conducted through the use of an electromagnetic PIC code MAGIC3D. The choice of a double-slot staggered RF cavity circuit was made because of a wide frequency bandwidth, moderate interaction impedance, and excellent thermal dissipation properties. We investigated the large-signal and nonlinear beam dynamics of a Ka-band CCTWT using MAGIC3D. The center frequency of the Ka-band CCTWT can be tuned from 28.4 to 30 GHz by varying the cathode voltage. Hot-test simulations show that the 84-cavity Ka-band CCTWT produces 540 W of saturated output power at 29 GHz with an electronic efficiency of 8.1% and a gain of 28 dB when the beam voltage and current are set to 17 kV and 390 mA, respectively.
Date issued
2008-12Department
Massachusetts Institute of Technology. Plasma Science and Fusion CenterJournal
IEEE Transactions on Electron Devices
Publisher
Institute of Electrical and Electronics Engineers
Citation
Hae Jin Kim, Hyoung Jong Kim, and Jin Joo Choi. “MAGIC3D Simulations of a 500-W Ka-Band Coupled-Cavity Traveling-Wave Tube.” Electron Devices, IEEE Transactions on 56.1 (2009): 149-155. © 2008 Institute of Electrical and Electronics Engineers
Version: Final published version
Other identifiers
INSPEC Accession Number: 10370165
ISSN
0018-9383
Keywords
double-slot staggered coupled cavity, MAGIC3D, traveling-wave tube