Novel Passive Calibration Method for Fully Polarimetric Near Field MIMO Imaging Radars

Körner G, Oppelt D, Adametz J, Vossiek M (2019)

Publication Type: Conference contribution

Publication year: 2019

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 150-153

Conference Proceedings Title: GeMiC 2019 - 2019 German Microwave Conference

Event location: Stuttgart

ISBN: 9783982039701

DOI: 10.23919/GEMIC.2019.8698138

Abstract

In this paper a novel method for calibration of multiple-input multiple-output (MIMO), fully polarimetric near field radar systems is presented. The developed approach allows for the first time a practical and effective calibration, i.e. the correction / equalization of the frequency transfer function of all polarimetric radar channels even in a near field scenario where the target distance is not large compared to the MIMO antenna array dimension. In a first step, the mutual coupling between all channels is corrected by an empty space measurement. The polarimetric calibration is based on measurements with two simple, passive calibration standards. An offset short calibration of the co-polarized channels is conducted by using a mirroring reflection of a plane metal plate. A dihedral reflector is employed for the calibration of the cross-polarized channels. Since the dihedral reflection is distinctly directive and due to the close range acquisition condition, only channels with adjacent antenna elements can contribute to the calibration process. However, it is shown in this paper, that the sparse calibration data obtained from these few antenna combinations are sufficient for a successive calibration of all cross-polarized channels. This way, the novel method allows for a simple but yet effective calibration of fully polarimetric high resolution near field imaging MIMO radars based on two cost-efficient passive standards and with very low adjustment efforts during the calibration.

Authors with CRIS profile

How to cite

APA:

Körner, G., Oppelt, D., Adametz, J., & Vossiek, M. (2019). Novel Passive Calibration Method for Fully Polarimetric Near Field MIMO Imaging Radars. In GeMiC 2019 - 2019 German Microwave Conference (pp. 150-153). Stuttgart, DE: Institute of Electrical and Electronics Engineers Inc..

MLA:

Körner, Georg, et al. "Novel Passive Calibration Method for Fully Polarimetric Near Field MIMO Imaging Radars." Proceedings of the 12th German Microwave Conference, GeMiC 2019, Stuttgart Institute of Electrical and Electronics Engineers Inc., 2019. 150-153.

BibTeX: Download