Numerical Analysis of High Radiation Intensity Dipole Antenna Arrays with Terahertz Chokes
Received:March 08, 2018  Revised:September 14, 2018  download
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Author NameAffiliationE-mail
CHEN Jing-Yuan Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences
University of Chinese Academy of Sciences 
jingyuan10@126.com 
LIN Zhong-Xi Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences  
LIN Qi Fujian Institute of Research on the Structure of Matter,Chinese Academy of SciencesUniversity of Chinese Academy of Sciences  
XU Yu-Lan Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences
University of Chinese Academy of Sciences 
 
SU Hui Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences huisu@fjirsm.ac.cn 
Abstract:To improve terahertz (THz) radiation intensity, the dipole antenna arrays with THz chokes on a thin LT-GaAs film are designed. The output radiation of the proposed linear array can be linearly enhanced by increasing the number of elements, while the average matching efficiency is changed insignificantly. The AC component flowing into the coplanar strip line (CPS) is limited by THz chokes which leads to a more stable resonant frequency, and the average matching efficiency is twice that of an array without chokes. We find the staggered array has a narrower emission spectrum than the gridding one due to the coupling of adjacent elements in the vertical direction. By designing the array on a polyimide lens instead of a silicon lens, a high input resistance can be obtained, and the total efficiency is raised from 25% to 35%.
keywords:Terahertz dipole antenna array  LT-GaAs film  THz choke  High input resistance  Polyimide lens  High radiation intensity
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Copyright:《Journal of Infrared And Millimeter Waves》