典型地物的毫米波双极化辐射特性测量技术研究

Research on Millimeter Wave Dual-polarization Radiation Characteristics of Typical Ground Objects

摘要:

针对典型地物目标的毫米波双极化辐射特性数据库不完善的问题，对天空、水面和植被土地3种典型地物目标进行8mm波段双极化辐射特性研究，并对比水平和垂直方向的辐射温度，分析它们的极化现象；根据毫米波辐射测量的基本原理，设计了8mm波段双极化辐射计和定标源；以典型地物背景的毫米波辐射特性为基础，利用8mm双通道辐射计对3种地物背景的辐射特性数据进行采集，并进行处理与分析；实验探究了不同地物背景的极化效应，丰富了辐射特性数据库，为典型地物目标成像和目标识别提供了有效的数据支持。

Abstract:

Aim at the incomplete database of millimeter-wave dual-polarization radiation characteristics of typical ground objects, the 8 mm-band dual-polarization radiation characteristics of three typical ground objects in the sky, water surface, and vegetation land were studied, and the horizontal and vertical radiation were compared. Temperature, analyze their polarization. Based on the basic principle of millimeter-wave radiation measurement, an 8-mm dual-polarization radiometer and a calibration source are designed. Based on the millimeter-wave radiation characteristics of typical feature backgrounds, the 8-mm dual-channel radiometer is used to radiate three types of feature backgrounds. Characteristic data were collected, processed and analyzed; experiments explored the polarization effects of different ground objects backgrounds, enriched the radiation characteristics database, and provided effective data support for typical ground object imaging and target recognition.