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已研制出二维单块天线阵,它可给出点源目的高度标(仰角)与方位(方位角)。该天线阵按行,列形式将天线和铋辐射热测量探测器排列在熔凝石英衬底上。能量通过放在衬底后面的透镜被聚焦到天线阵上。在1.38毫米波长上,用直径50毫米物镜,该天线阵的定位精度达到26弧度(最低值)。在差模扫描中,此精度进一步可提高到9弧秒,但究竟受到旋转台架机械部分的限制。这种跟踪可自动、快速地分二步进行,即首先把点源定位在最近的行列上,然后通过扫描进行精确定位。在信号处理中,该天线阵能跟踪多个点源。
A two-dimensional monolithic antenna array has been developed that gives a point elevation (azimuth) and azimuth (azimuth) of point source. The antenna array arranges the antenna and the bismuth bolometer in rows and columns on the fused silica substrate. The energy is focused on the antenna array by the lens placed behind the substrate. At a wavelength of 1.38 mm, with a 50 mm diameter objective, the antenna array has a positioning accuracy of 26 radians (lowest). In differential mode scanning, this accuracy can be further increased to 9 arc seconds, but is limited by the mechanical part of the rotary gantry. This tracking can be done quickly and automatically in two steps by first positioning the point source on the nearest row and then by scanning for precise positioning. In signal processing, the array can track multiple point sources.