Experimental Investigation of a Low-Cost, High Performance Focal-Plane Horn Array
Experimental Investigation of a Low-Cost, High Performance Focal-Plane Horn Array
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DOI：
10.1109/tthz.2011.2177701
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发表时间：
2012
影响因子：
3.2
通讯作者：
J. Leech;B. Tan;G. Yassin;P. Kittara;S. Wangsuya
中科院分区：
文献类型：
--
作者：
J. Leech;B. Tan;G. Yassin;P. Kittara;S. Wangsuya
在以前的工作中，我们描述了用遗传算法设计的新型光壁多喇叭。这些喇叭的一个主要特点是，通过使用一台成形的机床反复直接钻入一块铝板，可以非常快速、廉价地大量制造这些喇叭。这种快速制造技术将使构建成本非常低的焦平面阵列成为可能，为传统的电铸波纹喇叭阵列提供了一种替代方案。为了对这一新技术进行实验验证，我们构建了一个230 GHz的焦平面阵列，该阵列由37个光壁喇叭组成，采用直接钻孔的方法制作。我们给出了整个阵列中这些喇叭的大样本的测量波束模式，证明了我们的制造技术对大型阵列的适用性。我们测量了相邻馈电之间的交叉耦合，并表明它可以忽略不计。我们还提供了对小得多的700 GHz喇叭测量的高质量波束模式，显示了将这项技术扩展到THz频率的前景。
In previous work, we have described novel smooth-walled multiple flare-angle horns designed using a genetic algorithm. A key feature of these horns is that they can be manufactured very rapidly and cheaply in large numbers, by repeated direct drilling into a single plate of aluminum using a shaped machine tool. The rapid manufacturing technique will enable the construction of very low cost focal-plane arrays, offering an alternative to conventional electroformed corrugated horn arrays. In order to experimentally demonstrate the new technology, we constructed a 230 GHz focal-plane array comprising 37 smooth- walled horns fabricated by direct drilling. We present the measured beam patterns for a large sample of these horns across the array, demonstrating the suitability of our manufacturing techniques for large format arrays. We have measured the cross coupling between adjacent feeds and have shown that it is negligible. We also present high quality beam patterns measured for a much smaller 700 GHz horn, showing the promise of the extending this technology to THz frequencies.