Reflector Antenna Distortion Analysis Using MEFCM

Duan, Baoyan; Wang, C.S.

doi:10.1109/tap.2009.2028703

Cited by 81 publications

(60 citation statements)

References 7 publications

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“…In one hand, an artificial deformation on the antenna surface was accomplished by imposing some shims on the antenna backs as shown in Figure 5, and point 1 to point 13 were the positions of the shims. Based on the measuring data of the deformable surface, the random error model was built, and the electric properties of the antenna can be calculated by (3). On the other hand, the electric properties of the antenna also can be obtained by the simulation method shown in Figure 4.…”

Section: Testing Of the Theorymentioning

confidence: 99%

“…However, the reflector surface of the antenna in engineering application will never be fully consistent with the ideal surface, and there is necessarily some error. The error factors (random error and system error), as the significant factors affecting the antenna radiation characteristic, are the neck bottle against its rapid development [1][2][3]. Since Ruze published the first work on this subject and pursued the effect of small phase and amplitude error on the average sidelobe level [1].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the Random Error on the Radiation Characteristic of the Reflector Antenna Based on Two-Dimensional Fractal

Duan

Zheng

2012

International Journal of Antennas and Propagation

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Influence of the random error due to the distortion of the antenna reflector was discussed by using the two-dimensional fractal model. Firstly, a mathematical model of the random error was presented to investigate its impact on the radiation characteristic of the antenna, which was filtered from the two-dimensional fractal by using the wavelet analysis method. Based on the error model, a density formulation of the far field of the antenna with random error was deduced. Finally, a 3.7 m and a 3 m antennas were used to validate the proposed models, and a novel simulation method was put forward to remedy the deficiencies of existing software tools for the antenna with error. Results of the proposed methods showed a good agreement with the experimental data, and the existence of error broadened the beam width and raised the sidelobe level of the antenna, while it had little influence to the antenna gain. By comparison on results of the different scales error, the main influencing parameter of error was found out, which can provide the theoretical foundation for the control of the antenna surface working.

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Section: Testing Of the Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of the Random Error on the Radiation Characteristic of the Reflector Antenna Based on Two-Dimensional Fractal

Duan

Zheng

2012

International Journal of Antennas and Propagation

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show abstract

“…All of them have achieved good simulation results. The finite element software was used to analyze the structural deformation of the 40m antenna at different wind speeds, and the multi-field coupled model was proposed to analyze the pointing error caused by the structural deformation [12]. An antenna dynamic model was introduced to analyze the influence of the deformation of different structures on the pointing error.…”

Section: Introductionmentioning

confidence: 99%

A Correction Method of Estimating the Pointing Error for Reflector Antenna

Zhang

Huang

Liang

et al. 2018

Shock and Vibration

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The pointing error caused by the structural deformation of large reflector antennas has become the most challenging problem of antenna servo control. Especially with the increase of the antenna diameter and the working frequency, environmental loads not only make the structure deformation more obvious, but also make the pointing accuracy influenced by deformation more sensitive. In order to solve this problem, accurately estimating the pointing error caused by the structural deformation is the key. Based on the dynamic model of antenna structure and the analyzing model of pointing error, using the displacement information of sampling points on reflector, this paper proposes a correction method to achieve the purpose of accurately estimating the pointing error caused by the structural deformation. Using a 7.3-m Ka band antenna, the results show that the antenna maximum pointing error in theoretical model calculation is 0.0041 ∘ at 10m/s wind speed condition; however, the corrected pointing error would be about 0.0054 ∘ with considering the modeling error. After compensating the controller, the pointing error could be reduced to only 0.0008 ∘ and the performance of antenna pointing was improved.

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“…In the complicated electromagnetic jamming condition caused by a large number of other objects, the high gain and low sidelobe of array antenna are crucial parameters for the accurate acquisition of the targets' state [8,9]. However, affected by the fabrication accuracy and temperature load, the actual position of array element is inevitably deviated from its nominal position, resulting in a significant decrease in the gain and a severe increase in the side lobes [10][11][12][13][14][15][16]. This paper focusses on the design method of the position tolerance of antenna element.…”

Section: Introductionmentioning

confidence: 99%

Position Tolerance Design Method for Array Antenna in Internet of Things

Wang

Yuan

Yang

et al. 2018

Wireless Communications and Mobile Computing

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The position error of array antenna significantly deteriorates the gain and sidelobe of the array, which seriously hinders the realization of high performance of communication antenna for Internet of Things (IoT). Based on the sensitivity analysis theory, the sensitivity of the array radiation field with respect to the position of the antenna element is derived. Besides, a novel design method of position tolerance for array antenna is proposed and applied to a 20 × 20 planar array. Compared with the array designed by traditional method, the gain loss is basically the same (being 0.5 dB), while the peak sidelobe level is lowered by 1.937 dB ( = 0 ∘ )/1.586 dB ( = 90 ∘ ). Besides, the uncertainty analysis results show that the newly designed array has a much higher chance to achieve the desired performance, which fully demonstrates the innovation and effectiveness of the new method.

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Reflector Antenna Distortion Analysis Using MEFCM

Cited by 81 publications

References 7 publications

Effect of the Random Error on the Radiation Characteristic of the Reflector Antenna Based on Two-Dimensional Fractal

Effect of the Random Error on the Radiation Characteristic of the Reflector Antenna Based on Two-Dimensional Fractal

A Correction Method of Estimating the Pointing Error for Reflector Antenna

Position Tolerance Design Method for Array Antenna in Internet of Things

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