A new ocean wave and sea surface current monitoring system with horizontally-(HH) and vertically-(VV) polarized X-band radar was developed.Two experiments into the use of the radar system were carried out at two sites...A new ocean wave and sea surface current monitoring system with horizontally-(HH) and vertically-(VV) polarized X-band radar was developed.Two experiments into the use of the radar system were carried out at two sites,respectively,for calibration process in Zhangzi Island of the Yellow Sea,and for validation in the Yellow Sea and South China Sea.Ocean wave parameters and sea surface current velocities were retrieved from the dual polarized radar image sequences based on an inverse method.The results obtained from dual-polarized radar data sets acquired in Zhangzi Island are compared with those from an ocean directional buoy.The results show that ocean wave parameters and sea surface current velocities retrieved from radar image sets are in a good agreement with those observed by the buoy.In particular,it has been found that the vertically-polarized radar is better than the horizontally-polarized radar in retrieving ocean wave parameters,especially in detecting the significant wave height below 1.0 m.展开更多
提出了应用0.13μm SiGe BiCMOS工艺设计的全集成X和Ka波段T/R多功能芯片。包括5位数控移相器、低噪声放大器、功率放大器和收发控制开关都被集成在单片上。首次将分布式结构应用在多功能芯片的小信号放大器设计中,而且将堆叠式结构的...提出了应用0.13μm SiGe BiCMOS工艺设计的全集成X和Ka波段T/R多功能芯片。包括5位数控移相器、低噪声放大器、功率放大器和收发控制开关都被集成在单片上。首次将分布式结构应用在多功能芯片的小信号放大器设计中,而且将堆叠式结构的功放集成在收发芯片中,此两款多功能芯片均有着带宽宽、增益高、输出功率大等优点。其中X波段收发芯片接收、发射增益分别达到25 d B、22 d B,发射输出P-1d B达到28 d Bm;Ka波段收发芯片接收、发射增益分别达到17 d B、14 d B,发射输出P-1 d B达到20.5 d Bm。此两款应用硅基工艺设计的多功能芯片指标均达到国际先进水平,为X和Ka波段相控阵系统的小型化和低成本化提供了良好的条件。展开更多
基金Supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (Nos.KZCX1-YW-12-04,KZCX2-YW-201)the Instrument Developing Project of the Chinese Academy of Sciences (No.YZ200724)
文摘A new ocean wave and sea surface current monitoring system with horizontally-(HH) and vertically-(VV) polarized X-band radar was developed.Two experiments into the use of the radar system were carried out at two sites,respectively,for calibration process in Zhangzi Island of the Yellow Sea,and for validation in the Yellow Sea and South China Sea.Ocean wave parameters and sea surface current velocities were retrieved from the dual polarized radar image sequences based on an inverse method.The results obtained from dual-polarized radar data sets acquired in Zhangzi Island are compared with those from an ocean directional buoy.The results show that ocean wave parameters and sea surface current velocities retrieved from radar image sets are in a good agreement with those observed by the buoy.In particular,it has been found that the vertically-polarized radar is better than the horizontally-polarized radar in retrieving ocean wave parameters,especially in detecting the significant wave height below 1.0 m.
文摘提出了应用0.13μm SiGe BiCMOS工艺设计的全集成X和Ka波段T/R多功能芯片。包括5位数控移相器、低噪声放大器、功率放大器和收发控制开关都被集成在单片上。首次将分布式结构应用在多功能芯片的小信号放大器设计中,而且将堆叠式结构的功放集成在收发芯片中,此两款多功能芯片均有着带宽宽、增益高、输出功率大等优点。其中X波段收发芯片接收、发射增益分别达到25 d B、22 d B,发射输出P-1d B达到28 d Bm;Ka波段收发芯片接收、发射增益分别达到17 d B、14 d B,发射输出P-1 d B达到20.5 d Bm。此两款应用硅基工艺设计的多功能芯片指标均达到国际先进水平,为X和Ka波段相控阵系统的小型化和低成本化提供了良好的条件。
