Coupled structural–electromagnetic–thermal modelling and analysis of active phased array antennas

Wang, C.S.; Duan, Baoyan; Zhang, F.S.; Zhu, Min

doi:10.1049/iet-map.2008.0274

Cited by 63 publications

(31 citation statements)

References 9 publications

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“…e flatness error will cause resonant frequency offset, impedance mismatch, gain loss, and sidelobe level increase [15][16][17]. erefore, it is necessary to study the effect of structure deformation on the electrical performance of microstrip antennas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ground Plane Deformation on Electrical Performance of Air Microstrip Antennas

Wang

Lou

et al. 2020

International Journal of Antennas and Propagation

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This paper covers the variation of electrical performance of air microstrip antennas due to its ground plane deformation. A typical sinusoidal function is utilized to characterize the shape of deformation, based on which different shapes of ground plane can be obtained by changing control parameters. From the simulation results by HFSS, there is a strong linear relationship between the offset of resonant frequency and the amplitude of deformation. The equivalent thickness of the air medium is introduced into the calculation model, and then the mathematical model is established to describe the resonant frequency offset and deformation amplitude. It can also be seen from the radiation pattern that the directivity decreases with the increase of deformation. The proposed method can be used to predict the effect of ground plane deformation on electrical performance of air microstrip antennas.

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Section: Introductionmentioning

confidence: 99%

Effect of Ground Plane Deformation on Electrical Performance of Air Microstrip Antennas

Wang

Lou

et al. 2020

International Journal of Antennas and Propagation

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“…The subreflector array adjustment was used to achieve the match of the subreflector shape and to compensate for the loss of electrical 2 Shock and Vibration performance, which was caused by the main surface deformation from the slow changes such as gravity and temperature [6]. With considering the effect of temperature on the structural deformation, the optimal structure of reflector back frame was obtained by use of topology optimization, which could realize the effective inhibition to structural deformation caused by temperature gradient [7,8]. An electromechanical coupling analysis method of electromagnetic performance was proposed for the 40m antenna structural deformation in the solar radiation [9].…”

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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Coupled structural–electromagnetic–thermal modelling and analysis of active phased array antennas

Cited by 63 publications

References 9 publications

Effect of Ground Plane Deformation on Electrical Performance of Air Microstrip Antennas

Effect of Ground Plane Deformation on Electrical Performance of Air Microstrip Antennas

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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