Oral Presentation

A 210–360 GHz Wideband Millimeter-Wave Receiver for the FINER Project

Author(s): Haoran Kang (NAOJ), Takeshi Sakai (UEC), Yoichi Tamura (NagoyaU), Takafumi Kojima (NAOJ), Shun Ishi (NAOJ), Taku Nakajima (Suwa University of Science), Akio Taniguchi (KIT), Masato Hagimoto (NagoyaU), Tatsuya Takekoshi (KIT), and the FINER team

Presenter: Haoran Kang (National Astronomical Observatory of Japan)

The FINER project is developing two wideband, dual-polarization, sideband-separating heterodyne receivers covering 120–210 GHz and 210–360 GHz frequency ranges for the LMT in Mexico. Each receiver is designed to provide an IF bandwidth of 3–21 GHz per sideband and per polarization. With 40% of ALMA's light-collecting area and comparable atmospheric transmittance, the FINER system offers around five times of ALMA's current bandwidth, enabling cutting-edge spectral scanning capability in the next several years.

In this presentation, we first provide an overview of the current status of the FINER project. We then report on the recent development of the 210–360 GHz receiver, with a focus on the performance evaluation of the wideband low-noise superconductor–insulator–superconductor (SIS) mixer. Measurement results are presented for both the double-sideband (DSB) and sideband-separating (2SB) configurations.