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Active polarized tracker in high-accuracy low-noise Ku frequency band

A polarization tracking and low-noise technology, applied in the field of mobile satellite communications, can solve the problems of battlefield situation awareness, waste of time, and vulnerability to enemy attacks, and achieve accurate real-time tracking, precise control, and elimination of polarization interference. Effect

Active Publication Date: 2014-09-24
BEIJING RES INST OF TELEMETRY +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Not only is this a waste of time, it also creates issues with battlefield situational awareness and makes it vulnerable to enemy attack

Method used

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  • Active polarized tracker in high-accuracy low-noise Ku frequency band
  • Active polarized tracker in high-accuracy low-noise Ku frequency band
  • Active polarized tracker in high-accuracy low-noise Ku frequency band

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Embodiment Construction

[0021] Due to the increasing shortage of spectrum resources, satellite communication generally adopts the frequency multiplexing technology of orthogonal polarization. Ideally, the orthogonally polarized ports do not affect each other, but in practical applications, due to the disturbance of the polarization angle and the influence of atmospheric depolarization and other factors, cross-polarization interference will occur when communication satellites communicate with ground mobile terminals. Polarization angle disturbance refers to the "moving communication" satellite communication terminal encountering bumps, space barriers, etc. during the driving process, causing the attitude of the terminal to change at any time, causing the antenna to align with the satellite. The angle changes. Atmospheric depolarization refers to the multi-median effect of the troposphere, the depolarization of rainfall, and the Faraday rotation effect of the ionosphere, which cause the polarized wave ...

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Abstract

An active polarized tracker in a high-accuracy low-noise Ku frequency band enables the antenna polarization tracking function in a movement state to be achieved. The active polarized tracker comprises a low-noise amplifying circuit, a polarization control circuit, a power supply circuit and a phase shifter control circuit. The receiving and amplifying function of antenna signals can be achieved through the low-noise amplifying circuit, the phase correction and polarization tracking function can be achieved by the polarization control circuit, power is supplied to the low-noise amplifying circuit, a digital phase shifter and other devices by the power supply circuit, and a phase shifting state of the digital phase shifter is controlled through the phase shifter control circuit. Cross polarization interference of a communication-in-moving receiving antenna is adjusted and eliminated, so that the communication quality of a mobile satellite is improved.

Description

technical field [0001] The invention relates to a high-precision and low-noise Ku-band active polarization tracker, which belongs to the field of mobile satellite communication. Background technique [0002] During the Iraq War in 2003, the US military commander found that the communication system at that time could not meet the needs of the command during the movement, and the troops had to stop and erect antennas to communicate. Not only is this a waste of time, but it also creates problems with battlefield situational awareness and makes them vulnerable to enemy attack. This experience of the US military has promoted the development of "communication in motion" technology. The increasingly common application of digital networks in ground combat and the faster pace of command and control have also promoted the development of "communication in motion" technology. [0003] At present, "communication in motion" technology has become a hot satellite communication technology ...

Claims

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Application Information

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IPC IPC(8): H01Q3/34
Inventor 崔洁李洪涛祝大龙王慧玲李翠霞刘德喜张广栋
Owner BEIJING RES INST OF TELEMETRY
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