Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (2): 271-276.doi: 10.3969/j.issn.1001-506X.2020.02.03

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Joint calibration of missile-loaded phased array antenna by least square method—artificial Hadamard matrix

Di WANG1,2(), Xuemei WANG1(), Min HE2(), Jinchang ZHANG2(), Xinglong WANG1(), Changpeng SU1()   

  1. 1. Graduate School of Rocket Force University of Engineering, Xi'an 710025, China
    2. Beijing Institute of Remote Sensing Equipment, Beijing 100854, China
  • Received:2019-04-29 Online:2020-02-01 Published:2020-01-23

Abstract:

In order to calibrate the phased array antenna of the ballistic missile seeker more accurately and make up for the shortcomings of the current rotating vector missile-loaded phased array in calibrating, the least square method—artificial Hadamard matrix joint calibration method is proposed. This method uses the least square method to solve the problem that the phase shifter could only provide discrete phase changes and could not accurately obtain the phase change value of the phase shifter when the antenna composite is in the maximum power condition. The artificial Hadamard matrix is constructed to group the antennas, and each group of phase shifters rotates multiple phase elements at the same time, causing that the measured signal changes obviously.Far field calibration experiment shows that this method can achieve calibration results for the missile-loaded phased array antenna very well.

Key words: missile-loaded phased array antenna, artificial Hadamard matrix, least square method, amplitude and phase calibration

CLC Number: 

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