高频地波雷达宽带收发开关

高频地波雷达宽带收发开关 Wide-Band T/R Switch for HF Ground Wave Radar 吴世才 WU Shi cai 1 2 first-author 杨子杰 YANG Zi jie 1 2 石振华 SHI Zhen hua 1 2 武汉大学电子信息学院 武汉大学电子信息学院 School of Electronic Information, Wuhan University School of Electronic Information, Wuhan University 武汉大学电子信息学院,湖北,武汉,430072 武汉大学电子信息学院,湖北,武汉,430072 根据共站高频雷达的工作原理和 PIN二极管的物理特性 ,研制了应用于高频地波雷达 OSMAR2 0 0 0的收发开关电路 ,实现一付相控阵天线收发共用 ,大大减少占地面积和投资 .这种具有宽带特性的收发开关采用双时宽双极性脉冲控制 ,电路简洁 ,效率高 ,脉冲波形好 ,工作稳定可靠 According to the physical characteristics of PIN diode and the need of T/R co located HF ground wave radar, a T/R switch circuit was developed for the phased array of OSMAR2000 HF ground wave radar. The phased array is thus realized transmitting and receiving bi functional, and by doing so the array area occupation and investment on the radar is both considerably reduced. The wide band T/R switch operates under the control of double time duration and bi polar pulses, which lead to a simple, high efficient circuitry and well shaped waveform. The switch’s stabilization and credibility has been observed in the radar’s operation. Phased array antenna are widely applied in mid and long range HF ground wave radar （HFGWR） systems which are used to sense sea state remotely. To achieve high sensitivity and precision, array aperture normally reaches as large as several hundred or several thousand meters. For example, the Canadian HF GWR system located at Newfoundland has a 880 m phased receiving array containing 40 monopoles, and a 40 m high log periodical transmitting antenna. It is by far not easy to find a suitable seaside site for such kind system. Reducing array size is critical in the practical application of HFGWR. Co using the same antenna both as transmitting and receiving antenna is an effective means to reduce array size. The technique has been applied in the OSMAR2000 HFGWR system developped under the 818 01 02 key project in the national 863 plans. OSMAR2000 has realized real time surveillence of surface currents, waveheight and wind field out to 200 km. Gated pulses control the role shifting of an antenna between transmitting and receiving, where it is linked reliably to the transmitter and isolated from the receiver during transmitting period, then linked to the receiver and isolated from the transmitter during receiving period. The T/R switch is a key component in OSMAR2000. 高频地波雷达 PIN二极管 发收开关 压地波脉冲 HF ground wave radar PIN diode T/R switch blank pulse TN958.93 国家 8 63计划资助项目 （863 -818-0 1-0 2 ） 2001-05-01 2021-04-01 5