Photoconductive THz Antennas

被引：0

作者：

Khiabani, Neda ^{[1
]}

Huang, Yi ^{[1
]}

Shen, Yao-chun ^{[1
]}

Sajak, Aznida Abu Bakar ^{[1
]}

机构：

[1] Univ Liverpool, Dept Elect Engn & Elect, Liverpool L69 3GJ, Merseyside, England

来源：

2013 LOUGHBOROUGH ANTENNAS AND PROPAGATION CONFERENCE (LAPC) | 2013年

关键词：

THz CW system; THz photoconductive natenna; THz photomixer antena; THz pulsed system; TERAHERTZ; GAAS; PHOTOMIXERS; GENERATION; RADIATION; POWER;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Terahertz (THz) antennas based upon photoconduction techniques in THz pulsed and continuous-wave (CW) systems are introduced and compared. It is addressed that the differences in the excitation of these antennas lead to different design requirements. In both antenna types, optical-to-electrical conversion efficiency is very low - this means that employing techniques which can enhance the generated THz photocurrent in the antenna gap is necessary. Comparison of impedance matching of these antennas demonstrates that matching efficiency is a much more severe problem in a CW system than in a pulsed system. Regarding the coupling of the THz wave to the air, both antenna types suffer from low radiation efficiency due to the losses in photoconductive substrate. Considering these analyses, a simplified block diagram on how different parameters can improve the radiated THz power and efficiency is presented and finally a new THz photomixer solution with improved performance is demonstrated.

引用

页码：307 / 310

页数：4

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