Multiyear Trans-Horizon Radio Propagation Measurements at 3.5 GHz

Autor: Roel Schiphorst, Sjoert R. Fleurke, Ben A. Witvliet, Loek C. Colussi, Herman W. M. Teinsma, Johan Griffioen, Mark J. Bentum, Erik van Maanen

Publikováno v: Colussi, L C, Schiphorst, R, Teinsma, H W M, Witvliet, B A, Fleurke, S R, Bentum, M J & Griffioen, J 2018, ' Multiyear Trans-Horizon Radio Propagation Measurements at 3.5 GHz ', IEEE Transactions on Antennas and Propagation, vol. 66, no. 2, 8239680, pp. 884-896 . https://doi.org/10.1109/TAP.2017.2786305

The design, realization, and measurement results of a high-accuracy multiyear 3.5 GHz trans-horizon radio propagation measurement system are discussed, with both emphasis on the results and implemented technical measures to enhance the accuracy and o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f3d520bf3ce142e0c954c40c9576532
https://doi.org/10.1109/tap.2017.2786305

Sharing license-exempt spectrum based on multi-dimensional metrics

Autor: Roel Schiphorst, Peter Anker, Johannes Kruys

Publikováno v: info. 18:38-52

Purpose – The purpose of this paper is to investigate the possibility to replace radio equipment compliance requirements based on equipment parameters with a set of simple metrics that accurately reflects spectrum utilization and spectrum-sharing e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a4f59e54b376d736c92843ea6514f2fd
https://doi.org/10.1108/info-11-2015-0049

Near vertical incidence skywave propagation: Elevation angles and optimum antenna height for horizontal dipole antennas

Autor: Roel Schiphorst, Erik van Maanen, Cornelis H. Slump, George J. Petersen, Ben A. Witvliet, Albert J. Westenberg, Mark J. Bentum

Publikováno v: IEEE antennas and propagation magazine, 57(1), 129-146. IEEE

Near Vertical Incidence Skywave (NVIS) communication uses the ionosphere as a reflector to cover a continuous area with a radius of at least 150 km around the transmitter, on frequencies typically between 3 and 10 MHz. In developing countries, in are

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b2fb1f6851c86f07e6aba1fe4f9867c
https://doi.org/10.1109/map.2015.2397071

A transportable hybrid antenna-transmitter system for the generation of elliptically polarized waves for NVIS propagation research

Autor: Roel Schiphorst, Mark J. Bentum, Erik van Maanen, Cornelis H. Slump, Geert J. Laanstra, Rosa Ma Alsina-Pagès, Ben A. Witvliet

Publikováno v: 2016 10th European Conference on Antennas and Propagation (EuCAP), 1-5
STARTPAGE=1;ENDPAGE=5;TITLE=2016 10th European Conference on Antennas and Propagation (EuCAP)

For empirical research on Near Vertical Incidence Skywave (NVIS) characteristic wave propagation, a beacon transmitter system is needed that can be programmed to emit precisely defined elliptically and circularly polarized waves at high elevation ang

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6aec498b2ab42da59d433f1d8fd8a4a5
https://research.utwente.nl/en/publications/1db4c26d-d800-4688-b1c7-b98db62521dd

A T-DAB Field Trial Using a Low-Mast Infrastructure

Autor: M. Heskamp, Cornelis H. Slump, A.C. Aarden, N.A. Moseley, Roel Schiphorst

Publikováno v: IEEE transactions on broadcasting, 54(3), 356-370. IEEE

A novel low-mast low-power Terrestrial Digital Audio Broadcasting (T-DAB) single frequency network topology is described and evaluated in this paper. For this purpose, a pilot network (band III and L-band) was constructed in Amsterdam, the Netherland

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d94b8799a3e78a2a91fb87d5684245a
https://doi.org/10.1109/tbc.2008.2000287