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Space-borne microwave and laser communication link integrating system and application method

A technology of laser communication and satellite-borne microwave, which is applied in the field of satellite communication, can solve the problems of no communication terminal transmission integration, etc., and achieve the effects of good technical inheritance, light weight and low power consumption

Inactive Publication Date: 2015-07-22
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, domestic and foreign studies have analyzed the design schemes of laser communication and RoFSO communication systems. The two communication systems are designed separately, and there is a defect that the two communication terminals have not been integrated.

Method used

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  • Space-borne microwave and laser communication link integrating system and application method
  • Space-borne microwave and laser communication link integrating system and application method
  • Space-borne microwave and laser communication link integrating system and application method

Examples

Experimental program
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Effect test

Embodiment 1

[0092] In order to verify the integrated system and application method of spaceborne microwave and laser communication links, the following examples were carried out:

[0093] attached figure 1 The baseband data rate is 2.5Gbit / s, the laser (1) is modulated by direct modulation, the modulated light wavelength is 1552.52nm, the optical signal power at the output end of the laser (1) is 30dBm, and the light modulated by the laser (1) The signal is amplified by the first optical amplifier (2), and the signal amplified by the first optical amplifier (2) passes through the second beam controller (3) and the first beam controller (4), and is sent out through the optical antenna . After the optical signal emitted by the optical antenna is transmitted through 2km, it is input to the avalanche photodiode APD detector through the optical receiving antenna, the first beam controller (4), the second beam controller (3) and the lens (18), and the avalanche photodiode The gain of the APD ...

Embodiment 2

[0095]When the radio frequency antenna (7) receives a signal in the C-band, the received C-band microwave signal is amplified by the electric amplifier (8), and the microwave / optical modulation module (10) adopts an external modulation method to modulate the amplified microwave signal In the optical domain, the modulated laser power is 35dBm, and the modulated light-borne microwave signal is transmitted through the second optical amplifier (11), the third optical beam controller (12), the first optical amplifier (4) and the optical antenna, and passes through 2km After transmission, it is received by the optical antenna, coupled to the optical / microwave demodulation module (13) through the third beam controller (12) and the first optical amplifier (4), and the detector used in this module is a needle photodiode PIN detection The device has a responsivity of 1A / w. The optical domain spectrum diagram of the light-borne microwave signal can be measured by the spectrum analyzer at ...

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Abstract

The invention discloses a space-borne microwave and laser communication link integrating system and an application method. The integrating system comprises a laser, light amplifiers, a convergent lens, a light beam controller, an optical antenna, a photoelectric detector, a microwave / light demodulator, a light / microwave demodulator, a multiplexer, an electricity amplifier and a radio frequency antenna. The application method includes that a digital signal is modulated to a light area via the laser; an optical signal is coupled to the optical antenna for transmitting via light beam coupling; the optical signal is received and coupled to the photoelectric detector by the optical antenna; the optical signal is received by the optical antenna, processed by the light beam controller, coupled to the light / microwave demodulator, and converted into a microwave signal, the microwave signal is amplified by the electricity amplifier and coupled to the radio frequency antenna for transmitting; the microwave signal is received by the radio frequency antenna, amplified by the electricity amplifier and input to the multiplexer to realize microwave signal combination, then is modulated to the light area via the microwave / light demodulator; and finally the combined signal is coupled to the optical antenna for transmitting via the light beam controller. The space-borne microwave and laser communication link integrating system is small in size, low in energy consumption, and can be widely used in military and civil space-borne communication industry.

Description

technical field [0001] The invention relates to satellite communication, in particular to an integrated system and application method of satellite-borne microwave and laser communication links. Background technique [0002] Satellite communication technology is widely used in military and civilian fields. With the development of military communication and civilian communication technology, higher and higher requirements are put forward for the bandwidth and capacity of microwave communication. It is necessary to expand the range of electromagnetic spectrum and develop satellite laser communication technology. [0003] Satellite laser communication technology has a high data transmission rate and can realize ultra-high-speed data transmission. It has important applications in high-resolution ground-to-ground high-speed data transmission systems, inter-satellite high-speed backbone links, and space-based broadband backbone networks. In addition, the satellite laser communicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/118
Inventor 李勇军谭庆贵朱子行蒋炜赵尚弘李瑞欣康巧燕
Owner AIR FORCE UNIV PLA
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