Pulsed Photoconductive Connected Slot Array Operating at the Sub-mm Wavelength Band

A. Garufo, A. Davies, I. Lager, N. Llombart, A. Neto, P. Sberna, G. Carluccio, J. Freeman, D. R. Bacon, L. Li, J. Bueno, J. Baselmans, E. Linfield
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Abstract

A novel pulsed photoconductive THz source is presented that is able to radiate mW-level average powers, over a large bandwidth by exploiting both the optical and electrical properties of photoconductive sources and the ultrawideband properties of connected antenna arrays. An optical system composed of a micro-lenses array splits the laser beam into N x N spots that host the active excitation of the antenna arrays. An “ad hoc” network has been adopted to bias the array active spots in order to implement a connected antenna array configuration. The array feeds a silicon lens to increase the directivity of the radiated THz beam. A slot array prototype has been designed, fabricated, and measured. The proposed solutions achieve excellent power radiation levels by making use of an accurate electromagnetic design. This solution can offer enhancements to any active system relying on pulsed photoconductive antennas.
工作于亚毫米波段的脉冲光导连接槽阵列
提出了一种新型脉冲光导太赫兹源,利用光导源的光学和电学特性以及连接的天线阵列的超宽带特性,能够在大带宽上辐射毫瓦级的平均功率。由微透镜阵列组成的光学系统将激光束分成N × N个光斑,这些光斑承载着天线阵列的主动激发。采用“自组织”网络对阵列有源点进行偏置,以实现连接的天线阵列配置。该阵列馈入一个硅透镜以增加辐射太赫兹光束的方向性。设计、制作和测量了一个槽阵原型。所提出的解决方案通过使用精确的电磁设计实现了优异的功率辐射水平。该解决方案可以增强任何依赖脉冲光导天线的有源系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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