Phase-Shifted Traveling-Wave-Tube Circuit for Ultrawideband High-Power Submillimeter-Wave Generation
Phase-Shifted Traveling-Wave-Tube Circuit for Ultrawideband High-Power Submillimeter-Wave Generation
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DOI：
10.1109/ted.2009.2015404
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发表时间：
2009-05-01
影响因子：
3.1
通讯作者：
Luhmann, Neville C., Jr.
中科院分区：
文献类型：
--
作者：
Shin, Young-Min;Barnett, Larry R.;Luhmann, Neville C., Jr.
一种新型慢波真空电子器件电路，由半周期交错双叶片阵列和高深宽比片状电子束组成，用于高功率宽带亚毫米波发电。基于有限差分时域算法的细胞内粒子仿真表明，该电路具有非常宽的固有带宽（在 220 GHz 工作频率附近超过 56 GHz），并具有 13 dB/cm 的适度增益。此外，假设光束功率为 5 kW，对应于 150-275 W 输出功率的工作频段，饱和转换效率预计为 3%-5.5%。特别重要的是，该结构基于 TE 基模相互作用，从而避免了复杂的过调制不稳定性，这种不稳定性通常会导致传统高纵横比结构中的杂散信号振荡。该平面电路具有简单的二维几何结构，具有良好的热稳定性和机械稳定性，并且与传统的微加工技术兼容。这一概念预计将为低毫米波和亚毫米波区域的多功能电子设备的潜在应用带来大量机会。
A novel slow-wave vacuum electron device circuit, consisting of a half-period-staggered double-vane array and a high-aspect ratio sheet electron beam, has been conceived for a high-power wideband submillimeter-wave generation. A particle-in-cell simulation, which is based on a finite-difference time-domain algorithm, has shown that this circuit has a very wide intrinsic bandwidth (in excess of 56 GHz around the operating frequency of 220 GHz) with a moderate gain of 13 dB/cm. Moreover, the saturated conversion efficiency is predicted to be 3%-5.5% over the operating band corresponding to an output power of 150-275 W, assuming a beam power of 5 kW. Of particular importance, this structure is based on the TE-fundamental mode interaction, thereby avoiding the complex overmoding instabilities that usually cause spurious signal oscillation in conventional high-aspect-ratio structures. This planar circuit has simple 2-D geometry that is thermally and mechanically robust as well as being compatible with conventional microfabrication techniques. This concept is expected to open numerous opportunities in potential applications of versatile electronic devices in the low-millimeter- and submillimeter-wave regions.