Airborne Polarimetric Doppler Weather Radar: Antenna Aperture and Beam Forming Architecture

2019 IEEE International Symposium on Phased Array System & Technology (PAST) Pub Date : 2019-10-01 DOI:10.1109/PAST43306.2019.9020932

J. Vivekanandan, Adam Karboski, E. Loew

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引用次数: 3

Abstract

Radar performance depends on antenna characteristics, transmit power, transmit waveform and receiver design. Phased array radar (PAR) with solid-state amplifiers, attenuators and phase shifters uses additional signal processing schemes for achieving desired sensitivity, scan rate and data quality than in the case of a mechanically scanning radar that uses high-power klystron, magnetron or traveling wave tube transmitters. Active electronic scanning array (AESA) enables rapid scanning - the radar beam could be steered to any angular direction nearly instantly. Transmit and receive beam characteristics of AESA could be made independent of each other by an appropriate amplitude and/or phase weighting of the individual radiating element transmit and receive signals. Rapid steering of the antenna beam is suitable for beam multiplexing (BMX). BMX enables the collection of independent sample pairs of radar signals that reduce errors in radar measurements while providing rapid updates of scan volumes. Scan strategies for pencil beam and broad beam configurations are presented with regard to collecting reflectivity and radial velocity within a specified standard deviation of error. Beamforming radar architectures for pencil beam and broad beam configuration are described.

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机载极化多普勒天气雷达:天线孔径和波束形成结构

雷达性能取决于天线特性、发射功率、发射波形和接收机设计。与使用高功率速调管、磁控管或行波管发射机的机械扫描雷达相比，具有固态放大器、衰减器和移相器的相控阵雷达(PAR)使用额外的信号处理方案来实现所需的灵敏度、扫描速率和数据质量。有源电子扫描阵列(AESA)可以实现快速扫描-雷达波束几乎可以立即转向任何角度方向。通过对发射和接收信号的各个辐射元件进行适当的幅度和/或相位加权，可以使有源相控阵的发射和接收波束特性相互独立。天线波束的快速转向适用于波束复用(BMX)。BMX能够收集独立的雷达信号样本对，减少雷达测量中的误差，同时提供扫描体积的快速更新。在给定的标准误差范围内，提出了铅笔束和宽束结构的扫描策略，以收集反射率和径向速度。描述了铅笔波束和宽波束配置的波束形成雷达结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE International Symposium on Phased Array System & Technology (PAST)

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