Samenvatting
In this report we present design and first experimental results for
development of the submm superconducting integrated receiver
spectrometer for Terahertz Limb Sounder (TELIS). TELIS is a
collaborative European project to build up a three-channel heterodyne
balloon-based spectrometer for measuring a variety of atmospheric
constituents of the stratosphere. The 550 - 650 GHz channel of TELIS is
based on a phase-locked Superconducting Integrated Receiver (SIR). SIR
is an on-chip combination of a low-noise
Superconductor-Insulator-Superconductor (SIS) mixer with quasioptical
antenna, a superconducting Flux Flow Oscillator (FFO) acting as Local
Oscillator (LO), and SIS harmonic mixer (HM) for FFO phase locking. A
number of new solutions were implemented in the new generation of SIR
chips. To achieve the wide-band performance of the spectrometer, a
side-feed twin-SIS mixer and balanced SIS mixer with 0.8
µm2 junctions integrated with a double-dipole (or
double-slot) antenna is used. An improved design of the FFO for TELIS
has been developed and optimized providing a free-running linewidth
between 10 and 2 MHz in the frequency range 500 - 700 GHz. It is
important to ensure that tuning of a phase-locked (PL) SIR can be
performed remotely by telecommand. For this purpose a number of
approaches for the PL SIR automatic computer control have been
developed. All receiver components (including input optical elements and
Martin-Puplett polarization rotating interferometer for single side band
operation) will be mounted on a single 4.2 K plate inside a 40 ×
180 × 80 mm3 box. First measurements give an
uncorrected double side band (DSB) noise temperature below 250 K
measured with the phase-locked FFO; more detailed results are presented
at the conference.
Originele taal-2 | English |
---|---|
Pagina's (van-tot) | 1377-1380 |
Aantal pagina's | 4 |
Tijdschrift | Journal of Physics, Conference Series |
Volume | 43 |
Nummer van het tijdschrift | 1 |
DOI's | |
Status | Published - 1-jun.-2006 |