Dual-Double Slot Antennas Fabricated with Single Superconducting Film for Millimeter Wave Camera

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• 作者：Masato Naruse ; Tom Nitta ; Kenichi Karatsu…
• 关键词：Millimeter ; wave camera ; Superconducting device ; Quasi ; optical measurements
• 刊名：International Journal of Infrared and Millimeter Waves
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：37
• 期：2
• 页码：128-136
• 全文大小：1,481 KB
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• 作者单位：Masato Naruse (1)
  Tom Nitta (2)
  Kenichi Karatsu (2)
  Msakazu Sekine (2) (3)
  Shigeyuki Sekiguchi (2) (3)
  Yutaro Sekimoto (2)
  Takashi Noguchi (2)
  Tohru Taino (1)
  Hiroaki Myoren (1)
  
  1. Graduate School of Science and Technology, Saitama University, 255, Shimo-Okubo, Sakura, Saitama, 338-8570, Japan
  2. National Astronomical Observatory Japan, 2-21-1, Osawa, Mitaka, Tokyo, 181-8588, Japan
  3. Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8654, Japan
  
• 刊物类别：Physics and Astronomy
• 刊物主题：None Assigned
• 出版者：Springer New York
• ISSN：1866-6906

文摘

We propose an entirely plane-structure camera for millimeter wave astronomy, in order to reduce production cost and time. The camera is composed of a silicon lens-let, antennas, feed lines, and detectors made from the same superconducting aluminum film on a silicon substrate. A couple of double-slot antennas are located the same focal plane of a small substrate lens to enhance the packing density of detectors and observation efficiency. To achieve high sensitivity, we adapted a microwave kinetic inductance detector as a photon sensor, which consists of a superconducting microresonator. We examined the optical performance of the camera attached to a silicon lens array at 220 GHz in a 0.3 K cryostat. The measured beams were in good agreement with the calculations within the dynamic range of the setup (20 dB). Polarization misalignments between the dual-double slot antenna were less than 2∘, and cross-polarization level was around −7 dB. The relatively high cross-polarization would be explained by an antenna crosstalk mediated by quasiparticle diffusion.