Search Results - "Vowinkel, B"

Phase locking of a 1.5 Terahertz quantum cascade laser and use as a local oscillator in a heterodyne HEB receiver by Rabanus, D, Graf, U U, Philipp, M, Ricken, O, Stutzki, J, Vowinkel, B, Wiedner, M C, Walther, C, Fischer, M, Faist, J

“…We demonstrate for the first time the closure of an electronic phase lock loop for a continuous-wave quantum cascade laser (QCL) at 1.5 THz. The QCL is…”
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Large-area traveling-wave photonic mixers for increased continuous terahertz power by Michael, E. A., Vowinkel, B., Schieder, R., Mikulics, M., Marso, M., Kordoš, P.

“…A large-aperture design for terahertz traveling-wave photomixers, continuously pumped free space by two detuned diode lasers, is proposed and experimentally…”
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Pure Rotational Spectrum of HCN in the Terahertz Region: Use of a New Planar Schottky Diode Multiplier by Maiwald, F., Lewen, F., Ahrens, V., Beaky, M., Gendriesch, R., Koroliev, A.N., Negirev, A.A., Paveljev, D.G., Vowinkel, B., Winnewisser, G.

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Diode laser spectrum investigations for terahertz local oscillator applications by Wingender, M., Michael, E.A., Vowinkel, B., Schieder, R.

“…We present a new scheme for stabilizing diode lasers with optical feedback. This setup was designed with the intention to realize photonic local oscillators in…”
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HCN, CO, CS, CN, and CO + observations of comet Hyakutake (1996 B2) by Wouterloot, J.G.A., Lingmann, A., Miller, M., Vowinkel, B., Winnewisser, G., Wyrowski, F.

“…In March and April 1996 we observed the comet Hyakutake (1996 B2) with the KOSMA 3-m telescope. We detected the J = 2−1 and 3−2 transitions of CO, and the J =…”
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Investigation of planar antennas for submillimeter receivers by Kotthaus, U., Vowinkel, B.

“…A frequency-scaled model of a tapered slot antenna has been investigated. The antenna consists of a dielectric substrate which serves as a carrier for a…”
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Cryogenic All Solid-State Millimeter-Wave Receivers for Airborne Radiometry by Vowinkel, B., Gruener, K., Reinert, W.

“…Cryogenic receiver modules for 90 and 140 GHz have been developed that are part of an airborne imaging system. They consist of Schottky-barrier mixers followed…”
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Planar Schottky diode frequency multiplier for molecular spectroscopy up to 1.3 THz by Maiwald, F., Lewen, F., Vowinkel, B., Jabs, W., Paveljev, D.G., Winnewisser, M., Winnewisser, G.

“…We present a novel and compact frequency multiplier design for broad-band spectroscopy up to 1.38 THz. The multiplier generates harmonics of a fundamental…”
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Beat frequency generation between visible lasers with frequency differences in the 80-GHz band by Burghardt, B., Hoeffgen, H., Meisel, G., Reinert, W., Vowinkel, B.

“…Millimeter-wave GaAs Schottky barrier diodes were used as fast light detectors. It was possible to observe beat signals between a HeNe laser oscillating at 633…”
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Airborne Imaging System Using a Cryogenic 90-Ghz Receiver by Vowinkel, B., Peltonen, J.K., Reinert, W., Gruner, K., Aumiller, B.

“…A cryogenic 90-GHz receiver has heen developed with a noise figure of 2.36 dB ((double sideband) (DSB)) and an instantaneous band-width of 1.2 GHz. The cooled…”
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Semiconductor superlattice frequency multiplier for the submillimeter wavelength range by Renk, K.F., Ernst, T., Muthmann, M., Rogl, A., Stahl, B.I., Endres, C., Lewen, F., Vowinkel, B., Winnewisser, G., Koschurinov, Yu.I., Pavel'ev, D.G., Ustinov, V., Zhukov, A., Maleev, N., Vasilyev, A.

“…A report on a semiconductor superlattice frequency multiplier for generation of submillimeter waves is presented. The principle is based on the nonlinearity of…”
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Can ChatGPT Pass a Theory of Computing Course? by Golesteanu, Matei A, Vowinkel, Garrett B, Dougherty, Ryan E

“…Large Language Models (LLMs) have had considerable difficulty when prompted with mathematical questions, especially those within theory of computing (ToC)…”
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Image Recovery Millimeter-Wave Mixer by Vowinkel, B.

“…This paper describes the design of an 80 GHz image recovery mixer that has a conversion loss of 4.4 dB. The image filter is a circular highpass filter using…”
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Solid State MM-Wave Oscillators with Large Tuning Range by Jacobs, K., Vowinkel, B.

“…We describe broadband mechanical tunable oscillators using GaAs and InP Gunn diodes. Tuning ranges are 72 to 102 GHz (GaAs), 115 to 138 GHz (GaAs with…”
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First observations with CONDOR, a 1.5 THz heterodyne receiver by Wiedner, M. C, Wieching, G, Bielau, F, Emprechtinger, M, Rettenbacher, K, Volgenau, N. H, Graf, U. U, Honingh, C. E, Jacobs, K, Vowinkel, B, Menten, K. M, M, K, Nyman, L, Güsten, R, Philipp, S, Rabanus, D, Stutzki, J, Wyrowski, F

“…The THz atmospheric windows centered at roughly 1.3 and 1.5~THz, contain numerous spectral lines of astronomical importance, including three high-J CO lines,…”
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Characterization and Measurement of Radiometer Stability by Rau, G., Schieder, R., Vowinkel, B.

“…For the characterization of radiometer noise and stability a new and very practical method is introduced. It consists of the measurement of the…”
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Cryogenic All Sold-State Millimeter-Wave Receivers for Airborne Radiometry by Vowinkel, B., Gruner, K., Suss, H., Reinert, W.

“…Cryogenic receiver modules for 90 and 140 GHz have been developed that are part of an airborne imaging system. They consist of Schottky-barrier mixers followed…”
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Phase-Locked Millimeter Wave Gunn Oscillators with Large Mechanical Tuning Range by Bester, M., Jacobs, K., Vowinkel, B.

“…A new design for millimeter-wave Gunn oscillators has been developed, yielding a mechanical tuning range of about 15 GHz (70-85 GHz) and an output power up to…”
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Airborne Imaging System using Cryogenic Receiver Modules at 90 and 140 GHz by Vowinkel, B., Gruner, K., Suss, H., Reinert, W.

“…A high-resolution airborne imaging system has been developed that uses cryogenic receiver modules at 90 and 140 GHz. They consist of Schottky-barrier mixers…”
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A Precision 3-m Radiotelescope for Astronomical Observations at Millimeter and Sub-Millimeter Wavelengths by Vowinkel, B., Winnewisser, G., Mader, H., Pritzer, W.

“…A 3-m Radiotelescope with a surface accuracy of 30μm (r.m.s.) has been constructed that will be used for astronomical observations at millimeter and…”
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