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

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Abstract

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.

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Authors and Affiliations

  1. Graduate School of Science and Technology, Saitama University, 255, Shimo-Okubo, Sakura, Saitama, 338-8570, Japan

    Masato Naruse, Tohru Taino & Hiroaki Myoren

  2. National Astronomical Observatory Japan, 2-21-1, Osawa, Mitaka, Tokyo, 181-8588, Japan

    Tom Nitta, Kenichi Karatsu, Msakazu Sekine, Shigeyuki Sekiguchi, Yutaro Sekimoto & Takashi Noguchi

  3. Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8654, Japan

    Msakazu Sekine & Shigeyuki Sekiguchi

Authors
  1. Masato Naruse
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  2. Tom Nitta
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  3. Kenichi Karatsu
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  4. Msakazu Sekine
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  5. Shigeyuki Sekiguchi
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  6. Yutaro Sekimoto
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  7. Takashi Noguchi
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  8. Tohru Taino
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  9. Hiroaki Myoren
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Corresponding author

Correspondence to Masato Naruse.

Additional information

This work was partially supported by JSPS KAKENHI Grant Number 24860015 and 70262152. This work was partially supported by the co-development funding from Research Coordination Committee, NAOJ

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Naruse, M., Nitta, T., Karatsu, K. et al. Dual-Double Slot Antennas Fabricated with Single Superconducting Film for Millimeter Wave Camera. J Infrared Milli Terahz Waves 37, 128–136 (2016). https://doi.org/10.1007/s10762-015-0216-y

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  • DOI: https://doi.org/10.1007/s10762-015-0216-y

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