Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- 2004.10a
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- Pages.577-580
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- 2004
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- 1226-9743(pISSN)
A Noise Re-radiation Calibration Technique in Interferometric Synthetic Aperture Radiometer for Sub-Y-type Array at Ka-Band
- Seo Seungwon (Sensor System Laboratory, Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
- Kim Sunghyun (Sensor System Laboratory, Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
- Choi Junho (Sensor System Laboratory, Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
- Park Hyuk (Sensor System Laboratory, Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
- Lee Hojin (Sensor System Laboratory, Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
- Kim Yonghoon (Sensor System Laboratory, Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
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Kang Gumsil
(Satellite Application Department Korea Aerospace Research Institute)
- Published : 2004.10.01
Abstract
To overcome with large size noise source distribution network design difficulty in interferometric radiometer system, especially for sub-Y-type array, a new on-board calibration technique using noise re-radiation is proposed in this paper. The suggested calibration technique is using noise re-radiation effect of center antenna after noise source injection from matched load. This approach is especially proper to sub-Y-type array interferometric synthetic aperture radiometer in mm-wave frequency band. Compared with noise injection network of a conventional synthetic aperture radiometer, the system mass, volume, and hardware complexity is reduced and cost-effective. Only one internal noise source, matched load, is used for injection using noise re-radiation technique a small set of sub-Y receiver channels is calibrated. Detailed calibration scenario is discussed and simulation results about noise reradiation effect are presented.
Keywords