A high-gain 58-GHz box-horn array antenna with suppressed grating lobes

Autor: Arto Lehto, T. Sehm, Antti V. Räisänen

Publikováno v: IEEE Transactions on Antennas and Propagation. 47:1125-1130

A low-profile high-gain antenna array of box horns for the frequency band 57.2-58.2 GHz is presented. The antenna consists of 256 radiating elements divided into two subgroups of 128 elements fed by a rectangular waveguide feed network. The radiating

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16fe98d7d1591113be89330e44851255
https://doi.org/10.1109/8.785742

A 119 GHz planar Schottky diode mixer for a space application

Autor: P. Lehikoinen, Arto Lehto, Antti V. Räisänen, Juha Mallat, P. Piironen, Jussi Tuovinene

Publikováno v: International Journal of Infrared and Millimeter Waves. 17:807-818

A planar single-ended GaAs Schottky diode mixer has been designed, built, and tested at 119 GHz. The mixer front end includes also a waveguide filter for image rejection, and a temperature compensated ring filter. Measurements at room temperature sho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ec4a2ddaa1953e270549a3edbb795c7
https://doi.org/10.1007/bf02101389

Performance of the acousto-optical spectral line receivers at the metsahovi 14 m radio telescope

Autor: Antti V. Räisänen, L. Malkamaki, K. Mattila, J. Peltonen, Arto Lehto

Publikováno v: Experimental Astronomy. 2:149-161

The spectral line receiving system at the 13.7 m radio telescope at the Metsahovi Radio Research Station is described. A cooled low noise Schottky mixer receiver in 72–115 GHz range is employed. The back end system comprises three acousto-optical s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d738d4c5b48ec9ad838e13e7509ae0f
https://doi.org/10.1007/bf00566683

Millimetre wave antenna research at Helsinki University of Technology

Autor: S.N. Dudorov, Arto Lehto, Ville Viikari, Juha Mallat, V.S. Mottonen, Juha Ala-Laurinaho, Antti V. Räisänen, Dmitri Lioubtchenko, Janne Häkli, Tomi Koskinen, Anne Lönnqvist

Publikováno v: Ala-Laurinaho, J, Mallat, J, Häkli, J, Koskinen, T, Lönnqvist, A, Viikari, V, Mottonen, V, Dudorov, S, Lioubtchenko, D, Lehto, A & Raisanen, A V 2005, Millimetre wave antenna research at Helsinki University of Technology . in ANTEM 2005 : 11th International Symposium on Antenna Technology and Applied Electromagnetics, Conference Proceedings ., 7852017, IEEE Institute of Electrical and Electronic Engineers, 11th International Symposium on Antenna Technology and Applied Electromagnetics, ANTEM 2005, Saint-Malo, France, 15/06/05 . https://doi.org/10.1109/ANTEM.2005.7852017
Aalto University

This paper describes the research work at the Radio Laboratory of Helsinki University of Technology concerning millimetre and submillimetre wave antenna technology: development of new antenna designs and, especially, development of antenna measuremen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdc1c3874eec9e326dce37b9a49772dc
https://doi.org/10.1109/antem.2005.7852017

Simple broadband dual-polarized aperture-coupled microstrip antenna

Autor: Antti V. Räisänen, Arto Lehto, S. Hienonen

Publikováno v: IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010).

This paper presents a simple broadband dual-polarized microstrip antenna with only three layers. The input impedance bandwidth (VSWR 40 dB) between the ports and thus acceptable cross polarization (better than -20 dB). The geometry, return loss, and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c25fe6246535624e2f602d1038508e0b
https://doi.org/10.1109/aps.1999.789535