A multi-mode W-band radar/radiometer for experimental studies

Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197) Pub Date : 1998-05-11 DOI:10.1109/NRC.1998.677980

S. Nadimi, J. Bredow

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Abstract

This paper describes a 75-110 GHz millimeter-wave system with versatile functionality, for studying fundamental scattering, emission and absorption behaviors in the laboratory or in restricted field conditions. The primary studies of interest currently concern absorption spectra or behavior of pollutant gases and particulates; scattering and emission from clouds and fog; scattering, absorption and emission from snow and other natural dense media; and the reflection-transmission behavior of periodic structures such as waveguide gratings. A block diagram level design of the instrument is presented. The 75-110 GHz spectrum is monitored by using 2 receiver IF sections and dividing the region into 9 GHz wide segments. Frequency stability is maintained by locking all oscillators to a high quality ovenized crystal oscillator. Preselection is done at the input using quasioptical techniques in order to reduce insertion loss which would be encountered in waveguide filters. The system operates as a spectrometer, pulse radar, step frequency radar and radiometer.

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用于实验研究的多模w波段雷达/辐射计

本文介绍了一种具有多种功能的75-110 GHz毫米波系统，用于在实验室或受限的现场条件下研究基本散射、发射和吸收行为。目前主要关注的是污染物气体和颗粒物的吸收光谱或行为;云和雾的散射和发射;雪和其他天然致密介质的散射、吸收和发射;以及波导光栅等周期性结构的反射-透射特性。给出了仪器的框图级设计。75-110 GHz频谱通过使用2个接收机中频段并将该区域划分为9 GHz宽段来监控。通过将所有振荡器锁定到高质量的烤箱晶体振荡器来保持频率稳定性。使用准光学技术在输入端进行预选，以减少波导滤波器中可能遇到的插入损耗。该系统作为光谱仪、脉冲雷达、步进频率雷达和辐射计工作。

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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Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197)

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