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High Precision and Difference Measurement of Inter-element Amplitude and Phase Bias Errors Based on Channel Multiplexing

  • Ke Zhang
  • Huaming Chen
  • Xiangwei Zhu
  • Guangfu Sun
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 340)

Abstract

Modern satellite navigation system receiver use adaptive antenna array to suppress the RF interference and mitigate multipath signals in different directions from signals of interest. The inter-element amplitude and phase bias errors can cause performance degradation in the receiver. This paper presents a measurement with high precision in anechoic chamber, where channel multiplexing, difference measuring is used to decrease bias error caused by too many measuring data. And calibrating equation is put forward based on the three-dimensional rotating turntable, so that inter-element wave-way difference can be removed. Analyses show that the measuring precision can be increased by nearly double with low complexity and high efficiency. Then an automatic measuring system is designed, and data is measured by a multichannel vector network analyzer. A four elements array are measured, comparison between the measuring and simulating results demonstrates that the phase error is less than 8° while the efficiency is improved by nearly 4 times to conventional measurement.

Keywords

Antenna array Amplitude and phase bias error Difference measuring Wave-way difference calibration Channel multiplexing 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Ke Zhang
    • 1
  • Huaming Chen
    • 1
  • Xiangwei Zhu
    • 1
  • Guangfu Sun
    • 1
  1. 1.National University of Defense TechnologyChangshaChina

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