Abstract: A versatile, passive 95 GHz imaging testbed is reported. Naturally occurring W-band black body radiation provides the input. One or more radiometers are mechanically scanned in a raster pattern over the focal plane. Output signals of the radiometers are amplified, sampled and integrated before A/D conversion. The passive millimeter wave (PMMW) image is formed from the resulting 2D array of focal plane data. Images from 192 by 254 to 64 by 64 pixels have been achieved, frame time being proportional to the image size. Simple image processing may be required, depending on image parameters. The test bed easily accommodates a variety of receivers, from single channel to multichannel arrays. Both superheat and tuned radio frequency radiometers have been tested. The testbed is suitable for both fixed and mobile operation. Experimental results are reported for laboratory studies and for field tests in the Big Bend and Davis Mountains regions of southern Texas. The testbed has proven to be a compact, economic and versatile method of demonstrating and exploring PMMW imaging. !3
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机译：摘要：报道了一种通用的无源95 GHz成像测试平台。自然发生的W波段黑体辐射提供了输入。在焦平面上以光栅模式对一个或多个辐射计进行机械扫描。在进行A / D转换之前，对辐射计的输出信号进行放大，采样和积分。无源毫米波（PMMW）图像由焦平面数据的2D阵列形成。已经实现了从192 x 254像素到64 x 64像素的图像，帧时间与图像尺寸成正比。根据图像参数，可能需要简单的图像处理。该测试台可轻松容纳从单通道到多通道阵列的各种接收器。过热度和调谐射频辐射计均已测试。该测试台适用于固定和移动操作。据报道，实验结果用于得克萨斯州南部大弯和戴维斯山脉地区的实验室研究和现场测试。该测试台已被证明是一种演示，探索PMMW成像的紧凑，经济，通用的方法。 ！3
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