A Novel Wireless Internal Calibration Method of Spaceborne SAR
Internal calibration measures the changes in amplitude and phase of a system during imaging via the calibration loop built in Synthetic Aperture Radar (SAR). Internal calibration is also an important factor to improve the radiation accuracy of the radar. In this study, a novel wireless internal cali...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
China Science Publishing & Media Ltd. (CSPM)
2018-08-01
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| Series: | Leida xuebao |
| Subjects: | |
| Online Access: | http://radars.ie.ac.cn/fileup/HTML/R18005.htm |
| _version_ | 1827613614872199168 |
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| author | Wang Pei Sun Huifeng Yu Weidong |
| author_facet | Wang Pei Sun Huifeng Yu Weidong |
| author_sort | Wang Pei |
| collection | DOAJ |
| description | Internal calibration measures the changes in amplitude and phase of a system during imaging via the calibration loop built in Synthetic Aperture Radar (SAR). Internal calibration is also an important factor to improve the radiation accuracy of the radar. In this study, a novel wireless internal calibration method with
auxiliary antenna is presented, considering that the traditional scheme is inefficient, as the calibration loop cannot cover the path from the TR (Transmitter-Receiver) output to the antenna radiator. The calibration loop also results in a complicated and heavy network. The principle and model of the new method is given, and
the TR performance and system transfer function calibration approach are deduced. In addition, error analysis is conducted. The simulation results show that TR amplitude calibration errors caused by the rod of auxiliary antenna are at a 10–3 dB level, and phase calibration errors are obtained from the simulation curve in the paper; transfer function amplitude calibration errors are less than 0.1 dB, and phase calibration errors are not sensitive to the bias of the rod. Finally, the simulation results based on typical parameters of spaceborne SAR and the individual TR calibration experiments confirm the availability and feasibility of this novel method. |
| first_indexed | 2024-03-09T08:42:18Z |
| format | Article |
| id | doaj.art-d29c46ab5a94480ea7d1dbe24df00ba9 |
| institution | Directory Open Access Journal |
| issn | 2095-283X 2095-283X |
| language | English |
| last_indexed | 2024-03-09T08:42:18Z |
| publishDate | 2018-08-01 |
| publisher | China Science Publishing & Media Ltd. (CSPM) |
| record_format | Article |
| series | Leida xuebao |
| spelling | doaj.art-d29c46ab5a94480ea7d1dbe24df00ba92023-12-02T16:35:17ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2095-283X2018-08-017442543610.12000/JR18005A Novel Wireless Internal Calibration Method of Spaceborne SARWang Pei0Sun Huifeng1Yu Weidong2①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(University of Chinese Academy of Sciences, Beijing 100049, China)①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)Internal calibration measures the changes in amplitude and phase of a system during imaging via the calibration loop built in Synthetic Aperture Radar (SAR). Internal calibration is also an important factor to improve the radiation accuracy of the radar. In this study, a novel wireless internal calibration method with auxiliary antenna is presented, considering that the traditional scheme is inefficient, as the calibration loop cannot cover the path from the TR (Transmitter-Receiver) output to the antenna radiator. The calibration loop also results in a complicated and heavy network. The principle and model of the new method is given, and the TR performance and system transfer function calibration approach are deduced. In addition, error analysis is conducted. The simulation results show that TR amplitude calibration errors caused by the rod of auxiliary antenna are at a 10–3 dB level, and phase calibration errors are obtained from the simulation curve in the paper; transfer function amplitude calibration errors are less than 0.1 dB, and phase calibration errors are not sensitive to the bias of the rod. Finally, the simulation results based on typical parameters of spaceborne SAR and the individual TR calibration experiments confirm the availability and feasibility of this novel method.http://radars.ie.ac.cn/fileup/HTML/R18005.htmSynthetic Aperture Radar (SAR)Internal calibrationWireless transmissionAmplitude and phase errorTransfer function |
| spellingShingle | Wang Pei Sun Huifeng Yu Weidong A Novel Wireless Internal Calibration Method of Spaceborne SAR Leida xuebao Synthetic Aperture Radar (SAR) Internal calibration Wireless transmission Amplitude and phase error Transfer function |
| title | A Novel Wireless Internal Calibration Method of Spaceborne SAR |
| title_full | A Novel Wireless Internal Calibration Method of Spaceborne SAR |
| title_fullStr | A Novel Wireless Internal Calibration Method of Spaceborne SAR |
| title_full_unstemmed | A Novel Wireless Internal Calibration Method of Spaceborne SAR |
| title_short | A Novel Wireless Internal Calibration Method of Spaceborne SAR |
| title_sort | novel wireless internal calibration method of spaceborne sar |
| topic | Synthetic Aperture Radar (SAR) Internal calibration Wireless transmission Amplitude and phase error Transfer function |
| url | http://radars.ie.ac.cn/fileup/HTML/R18005.htm |
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