|
Records |
Links |
|
Author |
van't Klooster, K.; Myasnikova, S. E.; Parshin, V. V.; Kasparek, W. |
|
|
Title |
Results of reflection loss measurements of sample material for radio astronomy telescope antenna for Planck Project |
Type |
Conference Article |
|
Year |
2004 |
Publication |
Proc. 14th international crimean conference on microwave and telecommunication technology |
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
753-755 |
|
|
Keywords |
mirror, reflection index, emissivity, Fabry-Perot interferometer, space observatory, terahertz, THz |
|
|
Abstract |
Advanced radio telescope antennas for space applications are realised by the use of stable composite materials, which are lighter in general than various metal realisations. Reflectivity measurements have been carried out on high technology samples for the Planck radio telescope. Highly accurate results have been obtained at the Applied Physics Institute in Nizhny Novgorod, and an independent measurement with a totally different setup at the University of Stuttgart confirmed that one of the samples showed a strange behaviour. Moreover, it confirmed the high accuracy of the testing method. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
579 |
|
Permanent link to this record |
|
|
|
|
Author |
Shitov, S. V.; Inatani, J.; Shan, W.-L.; Takeda, M; Wang, Z.; Uvarov, A. V.; Ermakov, A. B.; Uzawa, Y. |
|
|
Title |
Measurement of emissivity of the ALMA antenna panel at 840 GHz using NbN-based heterodyne SIS receiver |
Type |
Conference Article |
|
Year |
2008 |
Publication |
Proc. 19th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
263-266 |
|
|
Keywords |
SIS mixer, reflection, emissivity, mirror, space telescope, space observatory |
|
|
Abstract |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
580 |
|
Permanent link to this record |
|
|
|
|
Author |
Tol, J. van; Brunel, L.-C.; Wylde, R. J. |
|
|
Title |
A quasioptical transient electron spin resonance spectrometer operating at 120 and 240 GHz |
Type |
Journal Article |
|
Year |
2005 |
Publication |
Rev. Sci. Instrum. |
Abbreviated Journal |
Rev. Sci. Instrum. |
|
|
Volume |
76 |
Issue |
7 |
Pages |
074101 (1 to 8) |
|
|
Keywords |
Schottky, noise temperature |
|
|
Abstract |
A new multifrequency quasioptical electron paramagnetic resonance (EPR) spectrometer is described. The superheterodyne design with Schottky diode mixer/detectors enables fast detection with subnanosecond time resolution. Optical access makes it suitable for transient EPR (TR-EPR) at 120 and 240 GHz. These high frequencies allow for an accurate determination of small g-tensor anisotropies as are encountered in excited triplet states of organic molecules like porphyrins and fullerenes. The measured concentration sensitivity for continuous-wave (cw) EPR at 240 GHz and at room temperature without cavity is 1013 spins/cm3 (15 nM) for a 1 mT linewidth and a 1 Hz bandwidth. With a Fabry-Perot cavity and a sample volume of 30 nl, the sensitivity at 240 GHz corresponds to [approximate]3×109 spins for a 1 mT linewidth. The spectrometer's performance is illustrated with applications of transient EPR of excited triplet states of organic molecules, as well as cw EPR of nitroxide reference systems and a thin film of a colossal magnetoresistance material. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
Actually, noise spectral density is given (3e-19 W/Hz) |
Approved |
no |
|
|
Call Number |
|
Serial |
588 |
|
Permanent link to this record |
|
|
|
|
Author |
Nagatsuma, T.; Hirata, A.; Sato, Y.; Yamaguchi, R.; Takahashi, H.; Kosugi, T.; Tokumitsu, M.; Sugahara, H.; Furuta, T.; Ito, H. |
|
|
Title |
Sub-Terahertz Wireless Communications Technologies |
Type |
Conference Article |
|
Year |
2005 |
Publication |
Proc. 18th International Conference on Applied Electromagnetics and Communications (ICECom 2005) |
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
1-4 |
|
|
Keywords |
subterahartz terahertz THz communications |
|
|
Abstract |
This paper presents a 10-Gb/s wireless link system that uses a 120-GHz-band sub-terahertz electro-magnetic waves. In the transmitter, photonic techniques are used for generation, modulation, and emission of the sub-THz signals, while the receiver is composed of all-electronic devices using InP-HEMTs. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
593 |
|
Permanent link to this record |
|
|
|
|
Author |
Nagatsuma, T.; Hirata, A.; Royter, Y.; Shinagawa, M.; Furuta, T.; Ishibashi, T.; Ito, H. |
|
|
Title |
A 120-GHz integrated photonic transmitter |
Type |
Conference Article |
|
Year |
2000 |
Publication |
Proc. International topical meeting on microwave photonics (MWP 2000) |
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
225 - 228 |
|
|
Keywords |
THz, teraherts communications, terahertz communication channel, photodiode, transmitter |
|
|
Abstract |
A photonics-based 120-GHz transmitter has been developed. A photodiode, a planar antenna and a silicon lens were integrated to form a compact millimeter-wave (MMW) emitter. The MMW signal emitted from the transmitter has been detected with a waveguide-mounted Schottky diode. The received power exceeded 100 μW, which is the highest value ever reported for photonic MMW transmitter at frequencies of >100 GHz |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
595 |
|
Permanent link to this record |