论文标题
用于D波段CMB观测的化学蚀刻的瓦楞纸霍恩阵列
A chemically etched corrugated feedhorn array for D-band CMB observations
论文作者
论文摘要
我们介绍了37个元素的瓦楞纸and阵列的设计，制造和测试，用于宇宙微波背景（CMB）的测量值140美元至170美元之间。该阵列设计为直接（用于总功率测量值）或通过矫形器传感器（用于极化测量值），将其与动力电感检测器阵列耦合。我们通过化学蚀刻铝板$ 0.3 $毫米和0.4美元的厚度制造了血小板的阵列。与相同频率范围内的其他技术相比，该过程是快速，低成本，可扩展的，并且产生高性能天线。室温电磁测量值显示出极好的可重复性，平均交叉极化水平约为$ -20 $ dB，回报损失约为$ -25 $ dB，首先sidelobes以下$ -25 $ db db和远低于$ -35 $ db。我们的结果使该过程成为最先进的CMB实验的有效候选者，在该实验中，具有高灵敏度和极化纯度的大型检测器阵列对于寻求发现CMB极化$ B $ modes至关重要。
We present the design, manufacturing, and testing of a 37-element array of corrugated feedhorns for Cosmic Microwave Background (CMB) measurements between $140$ and $170$ GHz. The array was designed to be coupled to Kinetic Inductance Detector arrays, either directly (for total power measurements) or through an orthomode transducer (for polarization measurements). We manufactured the array in platelets by chemically etching aluminum plates of $0.3$ mm and $0.4$ mm thickness. The process is fast, low-cost, scalable, and yields high-performance antennas compared to other techniques in the same frequency range. Room temperature electromagnetic measurements show excellent repeatability with an average cross polarization level about $-20$ dB, return loss about $-25$ dB, first sidelobes below $-25$ dB and far sidelobes below $-35$ dB. Our results qualify this process as a valid candidate for state-of-the-art CMB experiments, where large detector arrays with high sensitivity and polarization purity are of paramount importance in the quest for the discovery of CMB polarization $B$-modes.
