caa a22 4500 477123880 CHVBK 20180405111644.0 cr unu---uuuuu 170330e19970301xx s 000 0 eng 10.1007/BF02678006 doi (NATIONALLICENCE)springer-10.1007/BF02678006 Design and analysis of a waveguide sis mixer above the gap frequency of niobium [Elektronische Daten] [D. Hottgenroth, C. Honingh, S. Haas, K. Jacobs, J. Stutzki] We present the design and experimental data of an SIS waveguide mixer for frequencies from 760 to 820 GHz. We use a Nb-Al2O3-Nb junction with an integrated niobium tuning structure. The waveguide mixer block contains no adjustable tuning elements. Design criteria for lossy tuning structures, differing from the impedance matching techniques used in the lossless case, are described. We separate the influence of the intrinsic mixing properties of an SIS junction from the effects of the power coupling to the signal source on the overall noise. This allows us to derive the contributions of the optics, the losses in the stripline and the noise generated in the junction to the total receiver noise from the measurements. We achieve double sideband receiver noise temperatures of around 850 K at frequencies from 780 to 820 Ghz and 4.2 K operating temperature of the mixer. Cooling the mixer to 2.5 K results in an improvement of the receiver noise temperature by 150 to 200 K. The bandwidth is presently limited by the local oscillator. The mixer was successfully used in a dual channel receiver (440 to 490 GHz and 780 to 820 GHz) at the Submillimeter Telescope Observatory (SMTO) on Mount Graham, Arizona. Plenum Publishing Corporation, 1997 submillimetre wave mixers nationallicence superconducting device noise nationallicence microstrip lines nationallicence Hottgenroth D. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut Honingh C. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut Haas S. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut Jacobs K. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut Stutzki J. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/3(1997-03-01), 687-710 0195-9271 18:3<687 1997 18 10762 https://doi.org/10.1007/BF02678006 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02678006 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hottgenroth D. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut NATIONALLICENCE 700 1- Honingh C. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut NATIONALLICENCE 700 1- Haas S. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut NATIONALLICENCE 700 1- Jacobs K. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut NATIONALLICENCE 700 1- Stutzki J. KOSMA I. Physikalisches Institut der Universität zu Köln, Zülpicher Street 77, D-50937, Köln, Germany aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/3(1997-03-01), 687-710 0195-9271 18:3<687 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer