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一、前言在现代通讯、导航、雷达和电子对抗等领域的微波天线设备中,经常要求具备能迅速改变电磁波极化特性的装置,以使这些设备具有极化变换的特性。早期使用的变极化线路都是机械控制的,随着现代目标速度的不断提高、干扰机性能的不断改善以及对目标性质识别功能的要求越来越高,这种慢速度的变极化线路已不相适应。在单脉冲和相控阵等各种体制的雷达设备中,提出了希望在微秒或毫微秒量级实现快速变极化的要求。二极管和铁氧体移相器以及变极化器的研制成功并日臻完善,为快速变极化技术提供了可靠的应用前景。
I. INTRODUCTION Microwave antenna devices in the fields of modern communications, navigation, radar and electronic warfare often require devices capable of rapidly changing the polarization characteristics of electromagnetic waves in order to make them polarization converting. Early use of variable polarization circuit are mechanically controlled, with the continuous improvement of the modern target speed, continuous improvement of jammer performance and the recognition of the target nature of the increasingly high demand, this slow variable-polarization circuit Has not adapted. In radar systems of various architectures, such as single-pulse and phased-array systems, there is a desire to achieve rapid polarization-varying on the order of microseconds or nanoseconds. Diode and ferrite phase shifter and variable polarization device successfully developed and improved, for rapid polarization technology provides a reliable application.