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Quick calculation method for direction pattern and beam pointing direction of VICTS antenna

An antenna pattern and fast calculation technology, applied in the field of satellite communication antennas, to achieve the effect of eliminating inherent large errors, enhancing practical value, and increasing practical value

Active Publication Date: 2018-06-22
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU +1
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  • Abstract
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Problems solved by technology

[0005] In order to overcome the defects existing in the prior art, the purpose of the present invention is to provide a VICTS antenna pattern and beam pointing fast calculation method, the present invention is based on the dynamic coordinate system, the beam scanning theoretical model of the VICTS antenna is established, which can be used to quickly Calculate the beam pointing of the antenna and the pattern of the VICTS antenna with arbitrary aperture shape and arbitrary amplitude distribution. This method not only simplifies the complexity of the model, but also eliminates the problem of large calculation errors under a fixed reference coordinate system, and can accurately Revealing the double nonlinear and non-independent characteristics of VICTS antenna beam scanning

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  • Quick calculation method for direction pattern and beam pointing direction of VICTS antenna
  • Quick calculation method for direction pattern and beam pointing direction of VICTS antenna
  • Quick calculation method for direction pattern and beam pointing direction of VICTS antenna

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specific example

[0109] For a circular-aperture VICTS antenna with a diameter of 480 mm and an operating frequency of 12.25-12.75 GHz, under the conditions of γ = 30° and f = 12.75 GHz, the theoretical model and the full-wave electromagnetic simulation software CST are used to carry out calculation and analysis. The results are as follows Figure 6 , 7, 8. Figure 6 is the schematic diagram of the input amplitude distribution and aperture surface of the theoretical model, Figure 7 is the direction diagram calculated by using the theoretical model, Figure 8 It is the pattern obtained by using CST full-wave electromagnetic simulation software. At 12.5GHz, the elevation angle and azimuth angle of beam pointing under different rotation angles are in Figure 9 given in. Among them, (θ,φ), (θ cal ,φ cal ) and (θ closeed ,φ closeded ) represent the beam pointing pitch angle (the angle deviating from the front normal) and the azimuth angle obtained by using the full-wave simulation, the theor...

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Abstract

The invention belongs to the technical field of satellite communication antennae and particularly relates to a quick calculation method for a direction pattern and a beam pointing direction of a VICTSantenna. The method comprises the steps of firstly, theorizing a physical model, and making a radiation slot equivalent to an array consisting of discretized magnetic current elements; secondly, establishing a dynamic coordinate system, under a CTS layer rotation condition, dynamically selecting an X axis and a Y axis to be always vertical and parallel to the radiation slot, taking a rotary center of the VICTS antenna as a coordinate origin, and building a beam scanning theoretical model of the VICTS antenna in the dynamic coordinate system; and realizing quick calculation of the beam scanning theoretical model by utilizing fast Fourier transform. Based on the dynamic coordinate system, the beam scanning theoretical model of the VICTS antenna is built; and the method can be used for quickly calculating the beam pointing direction of the antenna and the direction pattern of the VICTS antenna with any aperture shape and any amplitude distribution.

Description

technical field [0001] The invention belongs to the technical field of satellite communication antennas, in particular to a fast calculation method for a VICTS antenna pattern and beam pointing. Background technique [0002] VICTS (Variable Tilt Angle Continuous Section Array) antenna is a new type of low-profile antenna. The antenna rotates through the one-dimensional plane of each functional layer to realize the adjustment and matching of beam azimuth, elevation two-dimensional scanning and polarization angle. The antenna feed is simple, the longitudinal section of the whole machine is low, it has the characteristics of high gain, flexible beam scanning, high mobility, etc., and has broad application prospects in the field of satellite mobile communication. [0003] However, the theoretical design of the VICTS antenna is extremely difficult. The antenna pattern is completely different from that of the reflector antenna, and has asymmetric and dynamic characteristics. Chan...

Claims

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Application Information

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IPC IPC(8): G06F17/50H01Q21/00
CPCG06F30/20H01Q21/00
Inventor 雷雪高峻陈国虎李天鹏刘铮胡浩明魏进进徐志坚张刚安娜
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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