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Terahertz communication system suitable for low-orbit satellites

A terahertz and signal technology, applied in the field of satellite communication, can solve the problems of low modulation and demodulation rate, insufficient power of terahertz source, and excessive noise of terahertz receiver, and achieve the effect of reasonable structure and excellent performance.

Active Publication Date: 2021-09-03
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0005]However, there are still practical application problems of terahertz communication on satellites: the power of terahertz source is insufficient, the noise of terahertz receiver is too large, and the rate of modulation and demodulation is not enough. These problems greatly restrict the development of terahertz technology in space applications, and due to the limitation of devices, there are still some difficulties in terahertz long-distance high-speed transmission

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  • Terahertz communication system suitable for low-orbit satellites
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  • Terahertz communication system suitable for low-orbit satellites

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Embodiment Construction

[0021] Below, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0022] The technical problem to be solved by the present invention is that the practical application of terahertz communication on satellites is difficult, the power of terahertz source is insufficient, the noise of terahertz receiver is too large, and the rate of modulation and demodulation is low. These problems will greatly restrict terahertz technology In the development of space applications, due to the limitation of devices, there are still some difficulties in the long-distance high-speed transmission of terahertz.

[0023] The invention combines the technical basis of the current microelectronics field, and designs a feasible system scheme and a practical practical scheme for application, and has been applied to the actual inter-satellite communication.

[0024] refer to Figure 1 to Figure 4 , the terahertz receiving load in this emb...

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Abstract

The invention discloses a terahertz communication system suitable for low-orbit satellites, and belongs to the technical field of satellite communication. According to the system, on-satellite 100M clock reference is adopted in a local oscillation link, phase noise is reduced, the frequency is kept stable, and frequency deviation caused by multiple times of frequency doubling is reduced. The traveling wave tube amplifier enables the power of a transmitting load to be improved to more than 5W, and the antenna gain reaches 48dB. A solid-state amplifier is adopted in a radio frequency link and serves as a driving stage of a traveling wave tube amplifier. An isolator is additionally arranged between the solid-state amplifier and the traveling wave tube amplifier, so reflected energy is prevented from entering the up-conversion through a loop to damage radio frequency devices such as a frequency mixer, a frequency multiplier and a solid-state power amplifier in the up-conversion. According to the invention, transmission of terahertz between low-orbit satellites is realized, and the transmission effect has the characteristics of high speed and long distance.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a terahertz communication system applicable to low-orbit satellites. Background technique [0002] Terahertz (terahertz) generally refers to the electromagnetic wave band with a frequency in the range of 0.1 to 10 THz on the electromagnetic spectrum. Terahertz waves are between microwave and millimeter waves and infrared, in the transition zone from macroscopic theory to microscopic quantum theory, and in the intersection area of ​​electronics and photonics. The special position determines that it has special properties different from other wave bands. [0003] Compared with microwave communication, the advantages of terahertz communication are as follows: 1) Abundant bandwidth resources and larger communication capacity; 2) terahertz waves are completely absorbed by the atmosphere and cannot reach the surface of the earth, so terahertz waves have better confident...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18521H04B7/18515H04B7/18513Y02D30/70
Inventor 崔冬暖段玮倩宋瑞良
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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