Paper Abstract and Keywords |
Presentation |
2022-12-09 14:35
Optimal Design of Attenuator for Helix-TWTs by Using 3D Numerical Simulations Kenji Nakajima (GSST/NECSpace/NETS), Kunio Tsutaki (RIE Shizuoka Univ.), Yoichiro Neo, Hidenori Mimura (RIE Shizuoka Univ./GSST Shizuoka Univ.) ED2022-66 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
With the recent advancement of communication capacity and speed, traveling wave tubes (TWT), that are used as final stage amplifiers in communication systems, are in strong demand for higher performance such as high output power, high efficiency and low distortion. Helix type TWTs have an attenuator in the middle of the slow wave circuit in order to obtain a high gain of 40-50dB or more. The attenuator is formed by spraying carbon onto the three support rods that fix the helix, and this density (loss pattern) is an important design element in improving the performance of TWTs. In this research, we propose a method to optimize the loss pattern by 3D numerical simulation, that was difficult with the conventional design method. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
TWT / Numerical Simulation / Optimal Design / Attenuator / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 122, no. 298, ED2022-66, pp. 51-54, Dec. 2022. |
Paper # |
ED2022-66 |
Date of Issue |
2022-12-01 (ED) |
ISSN |
Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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ED2022-66 |