Research Of Wind Profile Radar Antenna

Wind profiling radar in meteorological observations play an important role ,based on the wind profile radar target in this paper, demonstrated the wind profiler radar antenna's collectivity development scheme and the problems need to be solved.By the choice of the form of radar antenna unit ,confirmed the use of coaxial collinear antenna (coco) as the basic unit of radiation scheme.The main contents include:1,Analysing Characteristics of the coaxial element, modeling in simulation software HFSS, simulating its patterns,standing waves.The results showed that in the absence of a balanced feed, the coaxial collinear antenna'VSWR characteristic is poor, and therefore devised a compensation-type balun.In addition, the selection also coaxial media were discussed and ultimately choose to PTFE as a coaxial coaxial medium as the basic unit of radiation.2,Do a detailed analysis of the antenna network. According to the antenna performance requirements, the antenna is divided into upper and lower two-front.For example the upper front, H surface elements of the amplitude distribution using Taylor's distribution, the phase using equal phase distribution. In the E plane with three units form a linear array of radiation pattern -3dB, 0dB,-3dB of the ladder-type distribution.At the same time under the direction of Figure lobe half-power beam width of the main requirements to determine their unit number and unit spacing.And to write programs using MATLAB to calculate its amplitude and phase weighted ideal pattern.3,The antenna beam pointing to the formation of five different.Wind profiling radar beam has five, respectively, point to different directions in the use of rapid transformation in the five-beam.In order to achieve beam switching, and under the premise of reducing the cost of using the combination of switching and transmission-line phase-shift unit.In the actual measurement also verified the reliability of this unit.After obtaining the full text analysis and simulation results, the processing of the antenna in-kind, and the right kind, were tested. The article at the end of the antenna measured results are analyzed, suggesting improvements to further improve the performance of the radar wind profiler.