太赫兹科学与电子信息学报, 2016, 14 (1): 13, 网络出版: 2016-03-24
太赫兹双通道行波管高频系统
Terahertz high frequency structure with double channels
摘要
设计了一个基于交错双光栅的双路并联慢波结构,该结构采用两注电子及均匀恒磁场聚焦系统,具有平面二维结构。对该慢波结构的色散等冷测特性进行了详细研究,采用功分器和传输变换结构构成高频互作用电路,输出口为WR-2.8 标准波导口,在305 GHz~335 GHz 获得较好的传输特性,反射系数S 11<?15 dB,传输系数S 21>?4.4 dB。利用三维粒子模拟计算的方法,分析比较了单路及双路行波管放大特性。在电流密度53.57 A/cm2 情况下增益达到14.586 dB,是一种极具发展潜力的太赫兹器件。
Abstract
A novel slow wave structure with dual-gratings in parallel based on staggered double channels is proposed. The structure formed by double beams and a focusing system has a two-dimensional structure. Dispersion characteristics of slow-wave structure are simulated and analyzed in detail. The high frequency structure consists of power dividers and transmissions, and its output ports are standard waveguide named WR-2.8. The transmission losses of the whole RF structure S 21>?4.4 dB and the reflection parameter S 11<?15 dB are achieved. The beam-wave interaction properties of single channel and double channels are also simulated, and the gain can reach 14.586 dB with a current density of 53.57 A/cm2. Because of lower current density and simple structure, the RF system shows the application potential for terahertz Traveling Wave Tube(TWT).
李浩光, 杨军, 邓光晟, 黄小玲. 太赫兹双通道行波管高频系统[J]. 太赫兹科学与电子信息学报, 2016, 14(1): 13. LI Haoguanga, YANG Juna, DENG Guangshenga, HUANG Xiaoling. Terahertz high frequency structure with double channels[J]. Journal of terahertz science and electronic information technology, 2016, 14(1): 13.