应用于L波段风廓线雷达的2kW限幅器设计

Design of 2kW Limiter for L-Band Wind Profile Radar

边界层风廓线雷达为气象预报服务提供垂直性、连续性、高时空分辨率的探测数据。针对在全国各雷达站集中式雷达运行过程中限幅器频繁烧毁导致雷达停止工作的问题,设计了一种L波段2kW高功率无源限幅器。此款限幅器在电路前端引入双耦合电缆和功率电阻,增加了散热能力,一分为二限幅,使通过PIN二极管的功率降低一倍,电路后端多级二极管并联,逐级平缓限幅;具有承受功率高,限幅电平低,插入损耗小的特点。利用ADS软件进行仿真,并对限幅器进行了测试,结果表明各项指标满足设计要求。此款限幅器在边界层风廓线雷达上的应用,极大地提高了雷达稳定性。

The Boundary Layer Wind Profile Radar(WPR)provides vertical,continuous,and high spatial/temporal resolution detection data for weather forecasting services.Because the frequent burning of limiters during operation in centralized radar stations across China,an L-band high-power passive limiter is designed,which introduces dual-coupling cables and a power resistor at the front part of the circuit,divided into two limits and increased heat dissipation,to theoretically reduce the power by half through the PIN diode;the multi-stage diodes are in parallel at the back end,and the limiting process is gradual.The limiter is characterized by high withstand power,low limiting level and low insertion loss.Using ADS software for simulation,the limiter is tested,and the results meet the requirements of design.Application of this limiter in the boundary layer WPR greatly improves radar stability.