Oral Presentation

Development of Multi-Beam Superconducting Heterodyne Receiver for Radio Telescopes

Author(s): Shohei Ezaki, Wenlei Shan, Shin’ichiro Asayama, Takashi Noguchi and Satoru Iguchi (National Astronomical Observatory of Japan)

Presenter: Shohei Ezaki (National Astronomical Observatory of Japan)

Aiming to extend field of view of the radio telescopes, we have been developing highly compact multi-beam superconducting heterodyne receivers which allows us to accommodate more pixels than before on the focal plane. The concept for the multi-beam superconducting heterodyne receivers is incorporating planar orthomode transducers (OMT) and Superconductor-Insulator-Superconductor mixer circuits into an integrated circuit. We have designed and fabricated a single pixel prototype at ALMA band 4 frequency range (125 Hz-163 Hz), which includes a planar OMT and two balanced mixers. The preliminary assessment of cross polarization and mixer RF performance has been carried out. In this presentation, we will report the concept, the fabrication process and the experimental results of the devices.