Dual-polarization phased array weather radar

Abstract

The invention relates to a dual-polarization phased array weather radar. The radar comprises a waveguide slot planar antenna array which is formed by alternately configuring horizontally polarized antennas and vertically polarized antennas; a DTRU subsystem which is composed of a DTRU module and a cooling fan; a digital beam forming / signal processing subsystem which consists of a signal processingand light transmission module and a timing synchronization module; and a servo subsystem, a frequency source and distribution network subsystem and a monitoring subsystem, thereby achieving multipleworking mode requirements of double-transmitting and double-receiving, single-transmitting and double-receiving, and single-transmitting and single-receiving of the whole system. The working requirements of pitching dimensional phase scanning and single / multi-beam receiving can be met, weather target information can be rapidly detected, and occurrence and development of disastrous weather such asrainstorm, hail and tornado can be effectively monitored; meanwhile, dual polarization has good performance of quantitatively measuring echo intensity, and large-range rainfall can be quantitatively estimated; fixed-point, quantitative and timing rainfall forecasting is realized, and reliable and scientific detection data is provided for military and civil meteorological guarantee.

Description

technical field [0001] The invention relates to the field of radar, in particular to a dual-polarization phased array weather radar. Background technique [0002] Weather radar is a kind of meteorological radar. It is the main tool for monitoring and early warning of strong convective weather. Its working principle is to obtain precipitation by emitting a series of pulsed electromagnetic waves and using the scattering effect of precipitation particles such as clouds, fog, rain, and snow on electromagnetic waves. The spatial location, strength distribution, vertical structure, etc. Radar can effectively monitor the occurrence and development of catastrophic weather such as heavy rain, hail, and tornado; at the same time, it has good performance in quantitatively measuring echo intensity, and can quantitatively estimate precipitation in a wide range; realize fixed-point, quantitative, and timing-based precipitation forecasting , to provide reliable and scientific detection da...

AI Technical Summary

Problems solved by technology

[0003]The operational weather radars in active service use mechanical scanning antennas with only a single beam. It usually takes 6 to 8 minutes to complete an airspace detection. For thunderstorms, downbursts, Aviation hazardous weather such as wind shear, due to its small scale and fast change speed, it is impossible to obtain the refined 3D structure of hazardous weather in real time, which affects the identification, monitoring and early warning of hazardous weather

In order to ensure the quality of the detection data, we can only reduce the number of volume scan elevation angles, which cannot achieve full coverage of the elevation airspace. Effective detection of rapidly changing mesoscale and small-scale weather hazards such as thunderstorms and downbursts

Images