Terahertz photoelectric conductive antenna array and use thereof

A photoconductive antenna and terahertz technology, which is applied in the field of terahertz radiation, can solve problems such as the input impedance of antenna arrays without consideration, and achieve the effects of overcoming light saturation, increasing input resistance, and increasing input resistance

Active Publication Date: 2018-08-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research work at home and abroad is mainly focused on improving the input resistance of a single antenna. When considering the antenna array, the existing work is generally to simply arrange the single antenna repeatedly according to the rules, without considering the improvement of the input impedance of the antenna array.

Method used

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  • Terahertz photoelectric conductive antenna array and use thereof
  • Terahertz photoelectric conductive antenna array and use thereof
  • Terahertz photoelectric conductive antenna array and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Growth of 3 micron thick low-temperature gallium arsenide on a 50 micron thick gallium arsenide substrate, and then vapor-deposited with gold Figure 4 shaped antenna array, gold-plated with a thickness of 0.5 µm. The model is arranged in 1 row and 3 columns, with a total of three antenna elements. Each antenna unit is a dipole antenna, and the illuminated area of ​​the antenna is indicated by a small arrow in the CST software, named port3, port1, and port2 from left to right. After software calculation, the input resistance and average resistance of the three ports in the working frequency band are obtained, and Figure 6 express. Remove the triangular choke coil in the model to get the input resistance and average resistance of the three ports in the working frequency band, such as Figure 7 . Since the total energy of the antenna array is formed by superimposing the energy of each unit, the average resistance is used here as an indicator for evaluating performanc...

Embodiment 2

[0034] On the basis of Embodiment 1, the triangular choke coil is changed to a trapezoidal choke coil, and other parameters remain unchanged. Calculated by CST software Figure 8 The input resistance (inset) and average resistance of the three ports in . Compared Figure 7 and Figure 8 It can be seen that after adding the ladder choke coil, the peak value of the average resistance increases from 457Ω to 3308Ω, an increase of 7.2 times.

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Abstract

The invention belongs to the technical field of terahertz radiation, and specifically relates to a terahertz photoelectric conductive antenna array and a use thereof. According to the terahertz photoelectric conductive antenna array disclosed in the invention, a choking coil is introduced to the antenna array, so that current diffusion to other antenna units can be prevented and stray capacitanceis improved, the input resistance of the terahertz photoelectric conductive antenna array is increased, and the matching efficiency and radiation efficiency are improved; compared with the antenna array without the choking coil, the input resistance of the photoelectric conductive antenna array disclosed in the invention is remarkably increased; and by virtue of the relatively high input resistance and low-temperature gallium arsenide and other semiconductor materials, the resistance differences of a formed illumination region are reduced, so that the matching efficiency and antenna radiationefficiency are improved, and the radiation power or detection sensitivity of the antenna are improved.

Description

technical field [0001] The invention belongs to the technical field of terahertz radiation, and in particular relates to a terahertz photoconductive antenna array and its application. Background technique [0002] Terahertz (0.1THz-10THz) radiation is the last wave band to be researched and developed in the field of electromagnetic waves. It is between the fields of photonics and electronics. It is called the "terahertz gap" because of its immature technology. Compared with other electromagnetic wave bands, terahertz has unique properties. It has the advantages of safety and strong penetrating ability in medical, security inspection, materials and other application fields, and has great application prospects. The terahertz emission source and detector of the photoconductive antenna based on semiconductor material has the advantages of room temperature operation, miniaturization, and low price. After the photoconductive antenna is made into an array, it can also overcome pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q23/00H01Q21/00H01Q1/38H01Q1/50H01Q1/22
CPCH01Q1/225H01Q1/38H01Q1/50H01Q21/00H01Q23/00
Inventor 陈景源林琦徐玉兰林中晞苏辉
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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