To allow antenna movements in azimuth and elevation in high-power radar applications, rotary joints are essential. They allow the rotation of a transmission line and therefore are important transmission line components. In the present paper, a broadband rotary joint concept for high-power W-band radar applications is proposed. To avoid a twist of the polarization plane of a linearly polarized mode, like HE₁₁, a combination of two broadband polarizer is used. A cross polarization of X_pol ≤ − 20 dB can be achieved within the considered frequency range from 90 GHz to 100 GHz. This corresponds to a suitable value for radar applications.

中文翻译：

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大功率雷达应用的宽带旋转接头概念

为了在大功率雷达应用中允许天线沿方位角和仰角运动，旋转接头必不可少。它们允许传输线旋转，因此是重要的传输线组件。在本文中，提出了一种用于大功率W波段雷达应用的宽带旋转接头概念。为了避免像HE ₁₁那样的线性偏振模式的偏振面的扭曲，使用了两个宽带偏振器的组合。在考虑的90 GHz至100 GHz频率范围内，可以实现X _pol≤−  20 dB的交叉极化。这对应于雷达应用的合适值。