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A miniaturized S-band GaAs SSPA for Satellite Application 用于卫星的小型化s波段GaAs SSPA
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652273
Xiangyu Du, Ning Hua, Kai Chen, Yafei Shen, Jing Wang, Zhenhao Wang
{"title":"A miniaturized S-band GaAs SSPA for Satellite Application","authors":"Xiangyu Du, Ning Hua, Kai Chen, Yafei Shen, Jing Wang, Zhenhao Wang","doi":"10.23919/CISS51089.2021.9652273","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652273","url":null,"abstract":"A miniaturized S-band (2.2GHz-2.3GHz) GaAs SSPA with high output power of 12W was introduced. The production was composed of the power module and the RF amplifier module. The SSPA possesses good performance of high output power 41.97dBm, wide bandwidth 15MHz, high gain stability 0.22dB, flat group delay 2.5ns and flat amplitude and phase modulation 1.55°/dB. The SSPA was fabricated in a single package occupying area of 144.5mm×100mm×33mm. The weight of the SSPA is merely 780g which is advantageous in small aircraft application. In this paper, the design, simulation, test of performance and environmental suitability of the SSPA were discussed.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"147 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120882716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A matching method for low SNR SAR images 一种低信噪比SAR图像的匹配方法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652194
Qingqing Li, Di Zhang, Zhikai Yu, Panhu Li, Jiaqi Li
{"title":"A matching method for low SNR SAR images","authors":"Qingqing Li, Di Zhang, Zhikai Yu, Panhu Li, Jiaqi Li","doi":"10.23919/CISS51089.2021.9652194","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652194","url":null,"abstract":"Aiming at the requirement of high accuracy of synthetic aperture radar (SAR) image matching in scene matching guidance technology, and the problem that traditional matching method is not suitable for low signal to noise ratio (SNR) SAR image, a new SAR image matching method based on Scale-invariant feature transform (SIFT) feature is proposed. Firstly, the enhanced Lee filter is used to pre-process the image, and then the ROEWA is used to assign the main direction and construct the feature vector for SIFT feature points. Finally, the matching result is obtained according to the bidirectional Euclidean distance. The reliability and robustness of the proposed method are verified by comparative simulation.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132833242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Semi-active Control of Low Frequency Vibration of SAR Satellite under Fast Maneuvering Conditions 快速机动条件下SAR卫星低频振动半主动控制研究
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652312
Chen Zhu, Xingtian Liu, Fagang Zhao
{"title":"Research on Semi-active Control of Low Frequency Vibration of SAR Satellite under Fast Maneuvering Conditions","authors":"Chen Zhu, Xingtian Liu, Fagang Zhao","doi":"10.23919/CISS51089.2021.9652312","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652312","url":null,"abstract":"Synthetic Aperture Radar (SAR) satellite is a kind of high-resolution earth observation system. Due to the vibration sensitivity of the SAR antenna, maintaining the stability of the structure is the fundamental to ensure the imaging accuracy , so it is particularly important to suppress the vibration of the SAR satellite. In this paper, a finite element model of the SAR antenna with integrated relaxation dampers is established, the maneuvering conditions of the SAR satellite are simulated and analyzed, and the influence of the semi-active control on the vibration suppression effect of the SAR antenna is studied. The results show that the semi-active vibration control based on the relaxation damper has a good vibration suppression effect on the SAR antenna. The displacement amplitude is attenuated by more than 80% within 10s, and the time of complete attenuation is shortened by more than 50%. Provides a new idea for vibration suppression of large-scale SAR antennas, which has guiding significance for actual engineering.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122638169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
SAR Image Classification Using Non-Parametric Estimators of Shannon Entropy 基于Shannon熵非参数估计的SAR图像分类
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652326
Julia Cassetti, Daiana Delgadino, Andrea A. Rey, A. Frery
{"title":"SAR Image Classification Using Non-Parametric Estimators of Shannon Entropy","authors":"Julia Cassetti, Daiana Delgadino, Andrea A. Rey, A. Frery","doi":"10.23919/CISS51089.2021.9652326","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652326","url":null,"abstract":"Remote sensing with Synthetic Aperture Radar (SAR) data has become a vital tool for environmental studies. But they suffer the presence of speckle noise which hinders the analysis and interpretation of this kind of images. It has been shown that the ${mathcal{G}^0}$ family of distributions is a suitable model for SAR intensity because it possesses the ability to characterize areas with different degrees of texture. Information theory has gained a place in signal and image processing for parameter estimation and feature extraction. In this paper we evaluate the performance of different parametric and non-parametric Shannon entropy estimators in the single look cases, as attribute in the algorithm used for classification SAR images. These estimators were analyzed through Kappa and accuracy indexes. Finally, we apply these estimators to actual data.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122878583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Attitude steering analysis of long inter-satellite baseline spaceborne SAR system 长星间基线星载SAR系统姿态转向分析
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652276
Dong Yang, Hui Wang
{"title":"Attitude steering analysis of long inter-satellite baseline spaceborne SAR system","authors":"Dong Yang, Hui Wang","doi":"10.23919/CISS51089.2021.9652276","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652276","url":null,"abstract":"Doppler steering is one of the important functions of the SAR satellite attitude and orbit control system when it is running in orbit. In order to improve the imaging effect of the SAR system, the traditional single-satellite SAR satellite conducts two-dimensional guidance through the yaw axis and pitch axis to reduce the influence of the earth's rotation on the Doppler center frequency. For the bistatic SAR system, the relative motion between the two satellites makes the analysis more complicated. Therefore, it is necessary to analyze the Doppler effect and steering law of the bistatic SAR system, providing the relevant foundation for the bistatic SAR system and multi-base formation.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127972425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and Fabrication of a High-Gain Low-Sidelobe V-Band Wideband Gap Waveguide Slot Antenna Array 高增益低旁瓣v波段宽带波导缝隙天线阵列的设计与制造
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652360
Zhang Tao, Zhan Peng, Huang Yong, Lu Xunxun, Ma Yao, Liu Chao
{"title":"Design and Fabrication of a High-Gain Low-Sidelobe V-Band Wideband Gap Waveguide Slot Antenna Array","authors":"Zhang Tao, Zhan Peng, Huang Yong, Lu Xunxun, Ma Yao, Liu Chao","doi":"10.23919/CISS51089.2021.9652360","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652360","url":null,"abstract":"This paper presents the design of a high efficiency corporate-fed 16×16-slot array antenna in the V band. The antenna is built using three unconnected metal layers in ridge gap waveguide (RGW) technology. A 2×2 cavity-backed slot subarray is designed in a ridge gap waveguide cavity. The cavity is fed through a coupling slot from a ridge gap waveguide corporate-feed network in the lower layer. The subarray is numerically optimized in an infinite array environment. The corporate-feed network is realized by a texture of pins and a guiding ridge. The simulated antenna element shows a relative bandwidth input reflection coefficient better than -10 dB, and a -25 dB sidelobe level and -40 null depth have been realized.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116806776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Ship ISAR Imaging Algorithm Based on MPT-MDPT 基于MPT-MDPT的舰船ISAR成像算法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652223
Songbo Tao, Yugui Zeng, Miaoyu Li, Yingwei Wang, Yi Liang
{"title":"A Ship ISAR Imaging Algorithm Based on MPT-MDPT","authors":"Songbo Tao, Yugui Zeng, Miaoyu Li, Yingwei Wang, Yi Liang","doi":"10.23919/CISS51089.2021.9652223","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652223","url":null,"abstract":"The ship target is the focus of attention in marine monitoring activities. Due to the non-cooperative characteristic of the target, it is difficult to directly obtain the target's rotation information, so it is necessary to estimate the frequency modulation rate from the target echo. Aiming at the problem that the traditional frequency modulation rate estimation algorithm requires traversal search and the calculation is large, an ISAR ship target imaging method based on main peak tracking-multiple delay discrete polynomial phase transform (MPT-MDPT) is proposed. First, perform multi-delay discrete polynomial phase transformation on the echo data after motion compensation, and then use the main peak tracking technology to determine the corresponding main peak position under different delays to eliminate the interference of pseudo peaks, and finally calculate the frequency modulation rate according to the main peak position, which greatly reduces the amount of calculation for frequency modulation rate estimation. The simulation data processing results verify the effectiveness of the proposed algorithm.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117142406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spaceborne bistatic FMCW SAR imaging method based on FS algorithm 基于FS算法的星载双基地FMCW SAR成像方法
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652211
Lipeng Feng, Hui Wang, Shichao Zheng, Qiang Zhao, Zhaoyang Zeng, Xiang Chen
{"title":"Spaceborne bistatic FMCW SAR imaging method based on FS algorithm","authors":"Lipeng Feng, Hui Wang, Shichao Zheng, Qiang Zhao, Zhaoyang Zeng, Xiang Chen","doi":"10.23919/CISS51089.2021.9652211","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652211","url":null,"abstract":"Frequency modulated continuous wave synthetic aperture radar (FMCW SAR) is a new radar system, which has a series of advantages such as small volume, light weight, high resolution, low power consumption and low interception. At present, FMCW system is widely adopted in small or micro SAR. FMCW SAR transmits signals in the whole sweep period (PRT), and the duty cycle of the signal is more than 80%. Ignoring the instantaneous range change of the target caused by the continuous movement of the radar platform in the process of transmitting the signal will lead to the distortion of the received echo signal. In order to improve the antenna isolation and enhance the application of the algorithm in practical engineering, this paper adopts the same orbit forward dual satellite mode with the space of 10km and the side view of the transmitting satellite, and models the echo signal of FMCW SAR under the dual satellite system, The signal characteristics are analyzed. This paper explains that the continuous motion of the dual satellite platform produces a Doppler frequency shift in the range direction. Firstly, frequency scaling is performed in the azimuth frequency domain, and then the residual video phase (RVP) compensation is completed in the two-dimensional frequency domain. An improved frequency scaling (FS) algorithm suitable for dual satellite FMCW SAR imaging processing is given, The correctness and feasibility of echo model and imaging algorithm are verified by point target simulation.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116164989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal Behavior of Lithium Ion Battery for SAR Satellites SAR卫星用锂离子电池热性能研究
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652392
Mao Ya, Wang Bingxin, Ma Shangde, Guo Rui, Xie Jingying, Wang Ke
{"title":"Thermal Behavior of Lithium Ion Battery for SAR Satellites","authors":"Mao Ya, Wang Bingxin, Ma Shangde, Guo Rui, Xie Jingying, Wang Ke","doi":"10.23919/CISS51089.2021.9652392","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652392","url":null,"abstract":"For the improvement of the safety and reliability requirements of lithium ion batteries for space system, we have researched the thermal characteristic of NCA/C lithium ion battery for the large power synthetic aperture radar (SAR) satellites. The electrochemical performance and heat generation behavior under different states were studied. The charge and discharge processes of NCA/ graphite battery are exothermic in different currents, and the total heat increases with the current rate, as tested by Accelerating Rate Calorimeter.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126011689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Research on a Power Supply Scheme of Composite Bus for SAR Satellite SAR卫星复合母线供电方案的研究
2021 2nd China International SAR Symposium (CISS) Pub Date : 2021-11-03 DOI: 10.23919/CISS51089.2021.9652369
Junchao Song, Guojun Wang, Chengrong Cao, Hu Lei, Zhanlin Yang, Yubao Xin
{"title":"Research on a Power Supply Scheme of Composite Bus for SAR Satellite","authors":"Junchao Song, Guojun Wang, Chengrong Cao, Hu Lei, Zhanlin Yang, Yubao Xin","doi":"10.23919/CISS51089.2021.9652369","DOIUrl":"https://doi.org/10.23919/CISS51089.2021.9652369","url":null,"abstract":"When the SAR satellite load is working, the high-frequency pulse and high power will cause disturbance to the power supply bus. In order to solve this problem, the traditional SAR satellite's power sub-system adopts the method of independent power supply for the satellite load and the platform, that is, one bus bar provides power for the load, and another bus bar provides power for the entire satellite platform load. Although this method can solve the problem of the entire satellite bus disturbance, however, it will increase the weight and volume of the power system, which is not conducive to the miniaturization and lightweight development of the entire satellite. This paper proposes a power supply scheme for the composite busbar of SAR satellites below 15kW. The primary busbar supplies power to the load, and the primary busbar is converted to platform power supply. The converter adopts isolation and high-power filtering technology to ensure the power supply busbar’s power supply. For power quality, the entire system only needs to be equipped with a set of batteries. Compared with the traditional design, the power quality ratio is improved. This power supply scheme can provide design reference for the subsequent high-power SAR satellite power supply system.","PeriodicalId":318218,"journal":{"name":"2021 2nd China International SAR Symposium (CISS)","volume":"41 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123476512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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