The Superconducting Receivers of the Sub-mm Array of Taiwan

Shuai Shi, P. H. Wu

V. P. Koshelets, S. V. Shitov, Andrey M. Baryshev +6 more

The concept of a fully integrated superconducting receiver looks very attractive for sub-mm space astronomy where low weight, power consumption and volume are required. The possibility to integrate on a few chips the different planar components: a SIS mixer, a superconducting local oscillator (LO), an intermediate frequency amplifier followed by superconducting circuits for digitizing and processing of down converted signals, is discussed. A first implementation of a real integrated quasioptical receiver for frequencies up to 500 GHz is described. The one-chip receiver comprises a double dipole antenna, parallel biased SIS array mixer and Josephson Flux Flow Oscillator (FFO) with matching circuits. The results of extensive investigations of the integrated receiver as well as design and investigation of novel superconducting elements are presented.>

Boris S. Karasik, Andrei V. Sergeev

Alexander N. Vystavkin, V. P. Koshelets, G. A. Ovsiannikov

Dag Winkler, William R. McGrath, Bengt Nilsson +4 more

The authors have designed a sub-mm wave receiver using superconducting edge tunnel junctions (SIS/SIN). The mixer is subharmonically pumped at about 375 GHz, whereas the signal frequency is at twice this frequency. The local oscillator and the signal are both coupled to a constant width slot antenna, and via an exponential tapering to an array of two junctions coupled in series across a slotline. Design and preliminary results are discussed

Dag Winkler, William R. McGrath, Bengt Nilsson +4 more

We have designed a sub-mm wave receiver using superconducting edge tunnel junctions (SIS/SIN). The mixer is subharmonically pumped at about 375 GHz, whereas the signal frequency is at twice this frequency. The local oscillator and the signal are both coupled to a constant width slot antenna (CWSA), and via an exponential tapering to an array of two junctions coupled in series across a slotline. Design and preliminary results will be discussed in this report.