Characterization of a Compact Wideband Microwave Metasurface Lens for Cryogenic Applications
Characterization of a Compact Wideband Microwave Metasurface Lens for Cryogenic Applications
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DOI：
10.1109/arftg57476.2023.10279542
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发表时间：
2023-06
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通讯作者：
Ali Al-Moathin;Mingyan Zhong;Q. Al-Taai;Yunan Jiang;Michael E. Farage;J. Kazim;Muhammad Zulfiqar Ali;Fatemeh Nikbakhtnasrabadi;Megan Powell;Prince Khatri;M. Stanley;Alessandro Rossi;Hadi Heidari;M. Imran;Q. Abbasi;Nick M. Ridler;Martin Weides;Chong Li
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作者：
Ali Al-Moathin;Mingyan Zhong;Q. Al-Taai;Yunan Jiang;Michael E. Farage;J. Kazim;Muhammad Zulfiqar Ali;Fatemeh Nikbakhtnasrabadi;Megan Powell;Prince Khatri;M. Stanley;Alessandro Rossi;Hadi Heidari;M. Imran;Q. Abbasi;Nick M. Ridler;Martin Weides;Chong Li
在本文中，我们使用近场扫描系统对工作在6 GHz至14 GHz之间的紧凑型平面微波透镜进行了表征。一个X波段喇叭天线和开口矩形波导被用作照明源和探头，分别。|S21|当探针天线在垂直于光轴的平面上垂直和水平移动时测量。该透镜由夹在两层交叉取向光栅之间的超表面层制成。该透镜的总体尺寸为直径10厘米和厚度0.57厘米。测量结果表明，该透镜焦距为8 cm，光束宽度（半高宽）为3.5 cm，在整个带宽内，传输效率大于90%，交叉偏振增益为25 dB。室温下的测量结果与数值模拟结果吻合较好。所提出的透镜将用于低温环境中，例如用于量子计算系统的稀释制冷机。在低温下的更多结果，例如，低于30 K将在会议上显示。
In this paper, we present characterization of a compact flat microwave lens operating between 6 GHz and 14 GHz using a near field scanning system. An X-band horn antenna and open-end rectangular waveguide were used as an illumination source and probe, respectively. |S21| is measured as the probe antenna moves on a plane orthogonal to the optical axis vertically and horizontally. The lens is made of a metasurface layer that is sandwiched by two layers of cross-oriented gratings. The overall dimension of the lens is 10 cm in diameter and 0.57 cm in thickness. The measurement results show that the lens's focal length is 8 cm, and the beamwidth (full width at half maximum (FWHM)) is 3.5 cm, A transmission efficiency of over 90% and a cross-polarization gain of 25 dB were achieved over the entire bandwidth. The measurement results at room temperature are in good agreement with numerical simulations. The proposed lens will be used in a cryogenic environment e.g. dilution refrigerators for quantum computing systems. More results at cryogenic temperature e.g, below 30 K will be shown at the conference.