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A 385–500 GHz SIDEBAND-SEPARATING (2SB) SIS MIXER BASED ON A WAVEGUIDE SPLIT-BLOCK COUPLER

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An Erratum to this article was published on 18 September 2007

Abstract

We have developed a 385–500 GHz sideband-separating (2SB) mixer, which is based on a waveguide split-block coupler at the edge of the H-plane of the 508 μm × 254 μm (WR 2.0) waveguide, for the Atacama Large Millimeter/submillimeter Array (ALMA). An RF/LO coupler, which contains an RF quadrature hybrid, two LO couplers, and an in-phase power divider, was designed with the issue of mechanical tolerance taken into account. The RF/LO coupler was measured optically with a microscope and electrically with a submillimeter vector network analyzer. The image rejection ratio (IRR) and the single-sideband (SSB) noise temperature of the receiver using the RF/LO coupler have also been measured. The IRR was found to be larger than 8 dB and typically ∼ 12 dB in the 385–500 GHz band. The SSB noise temperature of this receiver is 80 K at the band center, which corresponds to 4 times the quantum noise limit (hf/k) in SSB, and 250 K at the band edges.

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Authors and Affiliations

  1. Department of Astronomy, School of Science, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan

    Mamoru Kamikura, Yu Tomimura, Yutaro Sekimoto & Yasutaka Serizawa

  2. Advanced Technology Center and ALMA-J project office National Astronomical Observatory of Japan, National Institutes of Natural Sciences, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan

    Mamoru Kamikura, Yu Tomimura, Yutaro Sekimoto, Shin’ichiro Asayama, Wenlei Shan, Naohisa Satou, Yoshizou Iizuka, Tetsuya Ito, Toshiaki Kamba, Yasutaka Serizawa & Takashi Noguchi

  3. Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, 210008, China

    Wenlei Shan

Authors
  1. Mamoru Kamikura
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  2. Yu Tomimura
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  3. Yutaro Sekimoto
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  4. Shin’ichiro Asayama
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  5. Wenlei Shan
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  6. Naohisa Satou
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  7. Yoshizou Iizuka
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  8. Tetsuya Ito
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  9. Toshiaki Kamba
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  10. Yasutaka Serizawa
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  11. Takashi Noguchi
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Correspondence to Mamoru Kamikura.

Additional information

An erratum to this article can be found at http://dx.doi.org/10.1007/s10762-007-9280-2

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Kamikura, M., Tomimura, Y., Sekimoto, Y. et al. A 385–500 GHz SIDEBAND-SEPARATING (2SB) SIS MIXER BASED ON A WAVEGUIDE SPLIT-BLOCK COUPLER. Int J Infrared Milli Waves 27, 37–53 (2006). https://doi.org/10.1007/s10762-006-9052-4

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  • DOI: https://doi.org/10.1007/s10762-006-9052-4

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