EAN: 9783319193625

DEVELOPMENT OF COHERENT DETECTOR TECHNOLOGIES F...

The thesis describes the development of receiver technologies for sub-millimetre astronomy
instruments  focusing on high performance coherent cryogenic detectors operating close to the
superconductor gap frequency. The mixer chip which comprises the SIS devices  fed by a
unilateral finline and matching planar circuits was fabricated on 15 micron silicon substrate
using the recently developed Silicon-On-Insulator (SOI) technology. This offered broadband IF
and RF performance  with fully integrated on-chip planar circuits resulting in an easily
reproducible mixer chip and a simple mixer block. An important consequence of this design is
that it can be extended to the supra-THz region and making the fabrication of multi-pixel
heterodyne arrays feasible. The extension of the operation of major telescopes such as ALMA 
APEX and the GLT from single pixel to large format arrays is the subject of extensive research
at present time since it will allow fast mapping combined with high resolution of the
submillimetre sky. The technology described in this thesis makes a major contribution to this
effort.

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