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Photonics-based Near-field Measurement and Far-field Characterization for 300-GHz Band Antenna Testing
Photonics-based Near-field Measurement and Far-field Characterization for 300-GHz Band Antenna Testing
- Source :
- IEEE Open Journal of Antennas and Propagation, IEEE Open Journal of Antennas and Propagation, 2022, 3, pp.24-31. ⟨10.1109/OJAP.2021.3133470⟩, IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 24-31 (2022)
- Publication Year :
- 2021
-
Abstract
- International audience; In this study, photonics-based near-field measurement and far-field characterization in a 300-GHz band are demonstrated using an electrooptic (EO) sensor with planar scanning. The field to be measured is up-converted to the optical domain (1550 nm) at the EO sensor and delivered to the measurement system with optical fiber. The typical phase drift of the system is 0.46° for the one-dimensional measurement time of 13 s, which is smaller than the standard deviation of the phase measurement of 1.2° for this time scale. The far-field patterns of a horn antenna calculated from the measured near-field distribution are compared with that measured with the direct far-field measurement system using a vector network analyzer. For the angular related parameters, the accuracy of the results obtained by our near-field measurement are comparable to that of those obtained by direct far-field measurements. The sidelobe level discrepancy (approximately 1 dB) between the results obtained based on our near-field measurement and those from the direct far-field measurements are attributed to the excess noise of the probe correction data. We believe that photonics-based near-field measurements with spherical EO probe scanning will pave the way for the characterization of high-gain antennas at the 300-GHz band.
- Subjects :
- [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism
planar scanning
Telecommunication
photonics technology
TK5101-6720
measurement
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
300 GHz
[SPI.TRON]Engineering Sciences [physics]/Electronics
Subjects
Details
- ISSN :
- 26376431
- Database :
- OpenAIRE
- Journal :
- IEEE Open Journal of Antennas and Propagation
- Accession number :
- edsair.doi.dedup.....3f4b657b1003df983de4fd8c2f392525
- Full Text :
- https://doi.org/10.1109/ojap.2021.3133470