| Records |
Author  |
van't Klooster, C. G. M.; Parshin, V. V.; Myasnikova, S. E. |
| Title |
Reflectivity of antenna reflectors: measurements at frequencies between 110 and 200 GHz |
Type |
Conference Article |
| Year |
2003 |
Publication |
Proc. Antennas and propagation society international symposium |
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| Volume |
3 |
Issue |
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Pages |
528-531 |
| Keywords |
mirror, reflection index, emissivity, reflectivity, mirror, Fabry-Perot interferometer, subterahertz, subTHz |
| Abstract |
It is imperative to test the mechanical, electrical and thermal-optical properties of MM and sub-MM reflector antennas. Electrical, thermal and optical properties are very important and high-accurate measurements lead, obviously, to more accurate results in applications. This paper deals with measurement of electrical reflectivity in the range 110-200 GHz. Reflectivity has been measured for a number of samples, which represent materials used in reflector antennas. Both metal samples and carbon-fibre samples were tested in a dedicated facility available for this purpose at the Applied Physics Institute in Nizhny Novgorod (IAP). The test facility is shortly discussed, with techniques for data extraction. Calibration is done with high quality silver coated mirrors and aluminium control samples. Accurate results have been derived with indicative interesting results. |
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583 |
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| 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 |
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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. |
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579 |
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