Space-borne liquid crystal optical phased-array antenna beam pointing dynamic switching method

A phased array antenna, liquid crystal optics technology, applied in the field of satellite mobile communication, can solve the problems of low deflection efficiency of liquid crystal optical phased array and the like

Pending Publication Date: 2021-09-10
军事科学院系统工程研究院网络信息研究所
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Problems solved by technology

[0004] Aiming at the problem that the actual deflection efficiency of the existing liquid crystal optical phased array is low, the present invention di

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  • Space-borne liquid crystal optical phased-array antenna beam pointing dynamic switching method
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  • Space-borne liquid crystal optical phased-array antenna beam pointing dynamic switching method

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the embodiments.

[0033] like figure 1 As shown, the embodiment of the present invention discloses a method for dynamically switching the beam pointing of a space-borne liquid crystal optical phased array antenna, including the following steps:

[0034] S1. Obtain the current beam pointing angle θ of the satellite communication system by analyzing the agility characteristics of the beam switching of the spaceborne liquid crystal optical phased array antenna 1 ;

[0035] According to the liquid crystal optical phased array theory, from the initial beam pointing angle α of the spaceborne liquid crystal optical phased array antenna 1 and target beam pointing angle α 2 , get the corresponding initial driving voltage array value U 1 and the target drive voltage array value U 2 , where U 1 =[U 1 (1), U 1 (2),...,U 1 (M)], U 2 =[U 2 (1), U 2 (2),...,U 2 (M)], M is the number of unit anten...

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Abstract

The invention discloses a method for dynamically switching beam pointing of a satellite-borne liquid crystal optical phased-array antenna. The method comprises the following specific steps: acquiring a current satellite system beam pointing angle theta 1 and an expected antenna pointing angle theta 2; calculating an absolute value of a difference value between theta 1 and theta 2, comparing the absolute value with a switching threshold value, and if the absolute value is smaller than the threshold value, waiting for a time interval, and re-acquiring a current beam pointing angle theta 1; if the absolute value is larger than the threshold value, calculating the initial phase shift amount and the target phase shift amount of each electrode in the current antenna; adjusting the phase shift amount of the electrode i from the initial phase shift amount to the target phase shift amount, and adding 1 to i; judging whether i is greater than the total number N of the electrodes, and if so, completing beam pointing switching; otherwise, adjusting the phase shift amount of the electrode i from the initial phase shift amount to the target phase shift amount, repeating the previous step until i is larger than the total number N of the electrodes, and completing satellite beam pointing switching. The power is kept stable in the wave position switching process, and wave beam control can be effectively and conveniently achieved; the beam pointing angle is in smooth transition, and far-field light spot blazing can be avoided.

Description

technical field [0001] The invention belongs to the field of satellite mobile communication, and in particular relates to a method for dynamically switching beam direction of a space-borne liquid crystal optical phased array antenna. Background technique [0002] Liquid crystal optical phased array (LCOPA) technology is an advanced beam scanning technology, which has the advantages of low driving voltage, low SWaP, fast response speed, etc. It is widely used in adaptive optics, lidar and space optical communication and other fields. LCOPA achieves high-precision beam deflection and beam pointing through precise modulation of beam phase. Due to the limitation of the liquid crystal processing technology level, the actual deflection efficiency of the liquid crystal optical phased array is far lower than the theoretical level, and the elimination of defects caused by the processing technology can only rely on the improvement of the production technology level. Therefore, improv...

Claims

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Application Information

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IPC IPC(8): G02F1/29H04B7/185
CPCH04B7/1851G02F1/292Y02D30/70
Inventor 何元智
Owner 军事科学院系统工程研究院网络信息研究所
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