Softwaretechnik-Trends

Study of a quasioptical superconducting integrated receiver for imaging applications at 400 - 700 GHz

S. V. Shitov, V. P. Koshelets, A. M. Baryshev, Lyudmila V. Filippenko, Willem Luinge, J. R. Gao, Petri Lehikoinen

Published Jan 1, 1997• 0 citations

Abstract

An imaging array receiver for the submillimeter wavelength is being developed. Each of 9 pixels of the array receiver is a single-chip superconducting receiver with dimensions 4 mm x 4 mm x 0.2 mm and contains a planar antenna, an all-Nb SIS mixer, a superconducting local oscillator (FFO) and the necessary coupling circuitry. A prototype design of the array receiver block, its optics and magnetic shielding are discussed. Experimental data for the integrated receiver for high frequency range of 550-700 GHz are reported. A first sample has shown receiver noise temperature of 560 K (DSB) at 645 GHz with optics optimized for 500 GHz. Smooth and permanent tuning has been demonstrated for the integrated LO over frequency range 610-700 GHz. To obtain ultimate coupling for both signals from the antenna and from the integrated LO, the integrated receiver concept with a quasioptical balanced SIS mixer is suggested.

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