Continuous terahertz wave generation based on photomixers coupled to Fibonacci fractal tree antennas

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• 作者：H. Jafari ; H. Heidarzadeh ; G. Rostami ; M. Dolatyari…
• 关键词：Terahertz ; Photomixer ; Fibonacci fractal antenna ; High radiation power ; THz generation
• 刊名：Optical and Quantum Electronics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：48
• 期：12
• 全文大小：2,895 KB
• 刊物主题：Optics, Optoelectronics, Plasmonics and Optical Devices; Electrical Engineering; Characterization and Evaluation of Materials; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-817X
• 卷排序：48

文摘

A comprehensive analysis and numerical simulation of continuous wave terahertz (THz) generation based on photomixing is performed in this paper. For numerical investigation, both semiconductor and electromagnetic equations are considered. The effects of photomixer parameters and geometry of the antenna on terahertz power generation (photocurrent and radiated power) are investigated. In this work, for improving performance of the integrated antenna, the fractal tree antenna for two different geometries (the narrow and wide configurations) using the Fibonacci sequence is presented. We demonstrate that the fractal tree antenna with Fibonacci series arrangement in the both cases of narrow and wide configurations increases the THz radiation power more than twice in comparison to usual dipole antenna.