Back to Search
Start Over
Calibration of a Polarimetric MIMO Array With Horn Elements for Near-Field Measurement.
- Source :
- IEEE Transactions on Antennas & Propagation; Jun2020, Vol. 68 Issue 6, p4489-4501, 13p
- Publication Year :
- 2020
-
Abstract
- Polarimetric multiple input and multiple output (MIMO) radar is capable of acquiring target’s high-resolution images and polarization scattering matrix (PSM). In this article, calibration of a polarimetric MIMO array of an instrumentation radar for near-field measurement is achieved at ${X}$ -band by using a rotatable double-antenna polarimetric active radar calibrator (RODAPARC) and a metal cylinder quickly and accurately. The theoretical PSM of the RODAPARC with different antenna rotation angles is derived from Huygens’ radiation electric field which is applicable to different bistatic angles. A polarimetric signal model is adopted to reduce the impact of the RODAPARC on calibration. Experimental studies are conducted on a polarimetric MIMO array which is measured and divided into quasi-monostatic and bistatic transceiver channels for assessment on the calibration performance. Promising calibration results are obtained with a polarization isolation improvement of about 16 dB and great reduction of the polarization channel gain error less than ±0.5 dB in amplitude and ±3° in phase. The calibrated polarization signatures for classic objects are consistent with the theoretical results. [ABSTRACT FROM AUTHOR]
- Subjects :
- CALIBRATION
S-matrix theory
NEAR-fields
ELECTRIC fields
RADAR
MEASUREMENT
Subjects
Details
- Language :
- English
- ISSN :
- 0018926X
- Volume :
- 68
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Antennas & Propagation
- Publication Type :
- Academic Journal
- Accession number :
- 143613869
- Full Text :
- https://doi.org/10.1109/TAP.2020.2975278