Design and Simulation of a 0.23-THz Extended Interaction Amplifier With Trapezoid-Neck Cavities
Design and Simulation of a 0.23-THz Extended Interaction Amplifier With Trapezoid-Neck Cavities
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DOI：
10.1109/ted.2021.3074112
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发表时间：
2021-06
影响因子：
3.1
通讯作者：
Yu-Xue Ji;Zongjun Shi;F. Lan;Jin Xu;Yanyu Wei;Ziqiang Yang;Yubo Liu
中科院分区：
文献类型：
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作者：
Yu-Xue Ji;Zongjun Shi;F. Lan;Jin Xu;Yanyu Wei;Ziqiang Yang;Yubo Liu
针对扩展互作用放大器（EIA），在传统梯形谐振腔的基础上，结合对称梯形颈腔，提出了一种新颖的谐振腔设计。谐振腔采用三间隙结构，其特性阻抗高于相应的单间隙结构。梯形颈部的影响进行了分析的TM 31- $2\pi $模式在太赫兹范围内。为了拓宽EIA的增益带宽，采用了交错调谐的方法，并提出了一种六腔结构。在交错调谐状态下，当输入驱动信号为20 mW时，所设计的多腔EIA在0.23THz处产生稳定的输出功率，增益约为35.05dB，效率为1.51%，带宽大于1.1GHz-3dB，14.7 kV电压和0.29 A电流通过束隧道。
We address extended interaction amplifier (EIA) and put forward a novel resonant cavity design based on a traditional ladder-type resonant cavitycombined with symmetrically trapezoidal neck cavities. The resonant cavity exploits a three-gap structure with characteristic impedance higher than the corresponding single-gap structure. The effects of the trapezoidal necks are analyzed for the TM31- $2\pi $ mode in the terahertz range. To broaden the gain bandwidth of the EIA, a stagger-tuning method is employed, and a six-cavity structure is proposed. After the stagger-tuning state, the designed multicavity EIA produces stable output power from a 20-mW input driving signal, with a gain of about 35.05 dB and efficiency 1.51% at 0.23 THz, with more than 1.1 GHz–3 dB bandwidth when a sheet beam with a dimension of 0.7 mm $\times $ 0.1 mm, 14.7-kV voltage and 0.29-A current passes through the beam tunnel.