The Development of Frequency Multipliers for Terahertz Remote Sensing System

Yong Zhang; Chengkai Wu; Xiaoyu Liu; Li Wang; Chunyue Dai; Jianhang Cui; Yukun Li; Nicholas Kinar

doi:10.3390/rs14102486

Remote Sensing (May 2022)

The Development of Frequency Multipliers for Terahertz Remote Sensing System

Yong Zhang,
Chengkai Wu,
Xiaoyu Liu,
Li Wang,
Chunyue Dai,
Jianhang Cui,
Yukun Li,
Nicholas Kinar

Affiliations

Yong Zhang: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Chengkai Wu: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Xiaoyu Liu: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Li Wang: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Chunyue Dai: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Jianhang Cui: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Yukun Li: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Nicholas Kinar: Smart Water Systems Laboratory, University of Saskatchewan, Saskatoon, SK S7N 3H5, Canada

DOI: https://doi.org/10.3390/rs14102486
Journal volume & issue: Vol. 14, no. 10
p. 2486

Abstract

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This paper summarizes the development of novel Schottky-diode-based terahertz frequency multipliers. The basic structure and manufacturing process of planar Schottky barrier diodes (SBDs) are reviewed, along with other diode structures that have been proposed in the literature. A numerical modeling method for the novel diodes in the context of terahertz frequency multipliers is presented, which includes 3D electromagnetic (EM) modeling, electro-thermal modeling and modeling of physical non-ideal effects. Furthermore, a general design methodology for developing terahertz frequency multipliers is introduced, involving a sub-division design method (SDM), a global design method (GDM) and a half-sub-division and half-global design method (HS-HGDM). These methods are summarized and compared for 110 GHz and 220 GHz frequency multipliers in the context of communication and imaging applications. Laboratory measurements of these multipliers show good agreement with numerical simulations. Finally, several classic terahertz remote sensing systems are reviewed, and a 220 GHz remote sensing system established using novel frequency multipliers for security inspection purposes is presented along with associated imaging results.

Published in Remote Sensing

ISSN: 2072-4292 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science
Website: http://www.mdpi.com/journal/remotesensing/

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