An improved antenna group delay measurement method using a three-antenna extrapolation technique

Haoyu Lin, Zhenfei Song, Xuetian Wang, Hongmin Gao

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

In order to minimize the error due to multiple reflections between antennas in the conventional group delay (GD) measurement, an improved antenna GD measurement method is proposed. In this method, antenna group delay is measured as a function of distances using a three-antenna extrapolation method. The GD is determined by averaging a set of measured GD values according to a derived multiple-reflection error model. Measurement in frequency band of (1575.42 ± 16) MHz for a circularly polarized helical antenna is presented, which gives the detail measurement procedures and validates the method. The uncertainty evaluation for this measurement was carried out as well, and an expanded uncertainty of 0.20 ns (k = 2) has been achieved. One more measurement example in frequency band of (4000 ± 10) MHz for a standard gain horn antenna with an expanded uncertainty of 0.12 ns (k = 2) is also presented briefly in this paper.

Original languageEnglish
Pages (from-to)675-681
Number of pages7
JournalRadioengineering
Volume26
Issue number3
DOIs
Publication statusPublished - 1 Sept 2017

Keywords

  • Antenna measurement
  • Group delay
  • Three-antenna extrapolation
  • Uncertainty evaluation

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Lin, H., Song, Z., Wang, X., & Gao, H. (2017). An improved antenna group delay measurement method using a three-antenna extrapolation technique. Radioengineering, 26(3), 675-681. https://doi.org/10.13164/re.2017.0675