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An Active Polarization Controller

A controller and vertical polarization technology, which is applied in the field of satellite mobile communication applications, can solve the problems of easy loose structure, large footprint of mechanical polarization controller, and long motor control cycle, so as to eliminate polarization interference and occupy a small space , high reliability effect

Inactive Publication Date: 2018-05-22
BEIJING AEROSPACE GUANGHUA ELECTRONIC TECH CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing design: In order to eliminate polarization interference, a mechanical polarization controller is usually used. The mechanical polarization controller has the disadvantages of large footprint, long motor control cycle, and easy loosening of the structure after long-term use.

Method used

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Firstly, the basic principle of the active polarization controller is described.

[0029] as attached figure 2 As shown, where Eh and Ev are the horizontal polarization signal and vertical polarization signal of the satellite respectively, and E ∥ ,E ⊥ are the horizontal and vertical signals output by the external antenna, θ is the polarization angle of the antenna, E ∥ ,E ⊥ The relationship with Eh and Ev is as follows:

[0030] E. ∥ =cosθEh–sinθEv (1)

[0031] E. ⊥ =sinθEh+cosθEv (2)

[0032] The formula obtained by inverting the coefficient matrix is ​​as follows:

[0033] Eh=cosθE ∥ +sinθE ⊥ (3)

[0034] Ev=-sinθE ∥ +cosθE ⊥ (4)

[0035] Formulas (3) and (4) show that the horizontal signal and the vertical signal can be weighted to obtain the satellite horizontal polarization signal and the satellite vertical polarization signal. The nega...

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Abstract

An active polarization controller realizes the polarization tracking function of the antenna in a moving state. The active polarization controller includes two signal input terminals, a signal output terminal, a low noise amplifier circuit, a polarization control circuit and a power supply circuit. The low noise amplifier circuit completes signal receiving and amplification functions, the polarization control circuit realizes the polarization tracking function, and the power supply circuit supplies power for the low noise amplifier circuit and the polarization control circuit. The purpose of the invention is to adjust and eliminate the cross-polarization interference of the "communication in motion" receiving antenna, so as to improve the quality of mobile satellite communication.

Description

technical field [0001] The invention relates to an active polarization controller, which belongs to the application field of satellite mobile communication. Background technique [0002] "Mobile Communication" can use fixed satellite resources to carry out mobile communication services, and can overcome the constraints of geographical location and equipment, and is widely used in emergency response, disaster relief, media communication and other fields. In the 2013 Ya'an earthquake, the land communication facilities in mountainous areas were destroyed. At that time, the armed police and fire trucks sent images and videos of the disaster-affected areas through "Mobile Communication" at the first time, which played an important role in the earthquake relief work. [0003] In order to work normally, the "communication in motion" must always be aligned with the satellite in the three dimensions of azimuth, elevation and polarization like a stationary earth station. However, mob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/24
Inventor 吴成才巩莉梁青云韩雪付平李鹏赵海娜杜文洲
Owner BEIJING AEROSPACE GUANGHUA ELECTRONIC TECH CO LTD
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