A Cold-Cathode Microwave and Terahertz Radiation Source: Experimental Realization @10’s GHz and Computational Design @THz
A Cold-Cathode Microwave and Terahertz Radiation Source: Experimental Realization @10’s GHz and Computational Design @THz
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DOI：
10.1109/led.2019.2932097
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发表时间：
2019-07
影响因子：
4.9
通讯作者：
Yang Xing;Yu Zhang;N. Xu;Y. Ke;Baohong Li;S. Deng
中科院分区：
文献类型：
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作者：
Yang Xing;Yu Zhang;N. Xu;Y. Ke;Baohong Li;S. Deng
基于场发射冷阴极的真空电子器件由于具有快速响应和低功耗的独特特性，有可能实现紧凑、新颖的高频电磁波辐射源。本文利用场电子发射的非线性，研制了一种工作在千兆至太赫兹频率范围内的基于倍频原理的冷阴极辐射源。辐射源是通过引入紧凑的结构和两个可再入腔谐振器来实现的。基于这种结构，分别设计了频率为12.10 GHz和0.1THz的辐射源，并进行了数值模拟。在此基础上，制作了12.10 GHz的碳纳米管冷阴极辐射源，并进行了实验测试。结果表明，在功率为1.05 mW的6.05 GHz输入信号激励下，可获得12.10 GHz的电磁波输出，功率为98 mU/W。我们的研究为微波和太赫兹波的产生提供了一种方法。
Due to their unique characteristics of instant responses and low-power consumption, vacuum electronic devices based on field emission cold-cathode have potentials for realizing compact and novel high frequency electromagnetic wave radiation sources. Herein, a cold-cathode radiation source operating in the frequency range from gigahertz to terahertz is developed, which is based on frequency multiplication by taking advantage of nonlinearity of field electron emission. The radiation source is realized by introducing a compact structure with two re-entrant cavity resonators. Based on such a structure, radiation sources of frequencies at 12.10 GHz and 0.1 THz were, respectively, designed and simulated numerically. Based on the simulation results, the 12.10-GHz radiation source using carbon nanotubes cold-cathode was fabricated and tested experimentally. The results showed that an electromagnetic wave output at 12.10 GHz with power of $98~\mu \text{W}$ can be achieved upon excitation by a 6.05 GHz input signal with power of 1.05 mW. Our study provides an approach for microwave and terahertz wave generation.