Thermal-structural Coupled Deformation Analysis of MIMO Radar Antenna Array

The MIMO radar antenna array will produce structural deformation under the action of heating and gravity. The structural deformation of the antenna array will cause great damage to the electrical performance of the antenna, such as increasing the sidelobe level and decreasing the antenna gain, widening the non-centralized lobe, decreasing the ability of receiving and receiving signals of the antenna, and so on. Network coverage reduction, etc. In this paper, ANSYS software is used to simulate the deformation of antenna array of coherent MIMO radar. The deformation and stress of antenna array from 0 to 90 degrees under rigid fixed conditions at temperatures of 20 degrees and 100 degrees are studied respectively. The results show that with the increase of the installation angle, the deformation of the front decreases, and the reduction speed is faster and faster. When the installation angle is less than 45 degrees, the stress decreases gradually and the velocity slows down with the increase of the angle. When the installation angle is greater than 45 degrees, the stress increases gradually and tends to increase rapidly.

[1]  P. Cheng,et al.  Heat transfer and pressure drop in fractal tree-like microchannel nets , 2002 .

[2]  Jian Li,et al.  Target detection and parameter estimation for MIMO radar systems , 2008, IEEE Transactions on Aerospace and Electronic Systems.

[3]  Clark W. Bullard,et al.  Air-side thermal hydraulic performance of multi-louvered fin aluminum heat exchangers , 2002 .

[4]  H.S.C. Wang.  Performance of phased array antennas with mechanical errors , 1990 .

[5]  Kaiguo Fan,et al.  Integrated geometric and thermal error modeling and compensation for vertical machining centers , 2015 .

[6]  Zichen Chen,et al.  Thermal-structure characteristics coupling analysis and optimisation for horizontal CNC machining centre spindle , 2014 .

[7]  M. C. Cunha,et al.  The influence of laser surface treatment on the fatigue crack growth of AA 2024-T3 aluminum alloy alclad sheet , 2017 .

[8]  P. Glockner,et al.  Effects of thermo-mechanical coupling in a plastic cylinder , 1996 .

[9]  James K. Hsiao.  Array Sidelobes, Error Tolerance, Gain, and Beamwidth , 1984 .

[10]  Jian Li,et al.  MIMO Radar with Colocated Antennas , 2007, IEEE Signal Processing Magazine.

[11]  D.W. Bliss,et al.  Multiple-input multiple-output (MIMO) radar: performance issues , 2004, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004..

[12]  M. Eslami,et al.  AXISYMMETRIC MECHANICAL AND THERMAL STRESSES IN THICK SHORT LENGTH FGM CYLINDERS , 2009 .

[13]  Ya-Peng Shen,et al.  A DIRECT FINITE ELEMENT METHOD STUDY OF GENERALIZED THERMOELASTIC PROBLEMS , 2006 .

[14]  S. Pellegrino,et al.  AN INTRODUCTION TO THE ANALYSIS OF SYMMETRIC STRUCTURES , 1999 .