Title :
Characteristic Wave Diversity in Near Vertical Incidence Skywave propagation
Author :
Witvliet, Ben A. ; van Maanen, Erik ; Petersen, George J. ; Westenberg, Albert J. ; Bentum, Mark J. ; Slump, Cornelis H. ; Schiphorst, Roel
Author_Institution :
Spectrum Manage. Dept., Radiocommun. Agency Netherlands, Groningen, Netherlands
Abstract :
In Near Vertical Incidence Skywave (NVIS) propagation, effective diversity reception can be realized using a dual channel receiver and a dual polarization antenna with polarization matched to the (left hand and right hand) circular polarization of the characteristic waves propagating in the ionosphere. This paper presents measurements on NVIS-signals received via ionospheric F-layer reflection using a dual circular polarization receive antenna, demonstrating a reduction of the fading margin by 8-11 dB over a single circular polarization antenna. The measurements where performed at a mid-latitude location in the Northern hemisphere, over a distance of 110 km.
Keywords :
diversity reception; ionospheric electromagnetic wave propagation; receiving antennas; NVIS propagation; Northern hemisphere; characteristic wave diversity; distance 110 km; diversity reception; dual channel receiver; dual circular polarization; dual polarization antenna; ionospheric F-layer reflection; mid-latitude location; near vertical incidence skywave propagation; receive antenna; Antenna measurements; Fading; Ionosphere; Polarization; Receiving antennas; characteristic wave; diversity; fading; ionosphere; measurement; polarization; propagation;
Conference_Titel :
Antennas and Propagation (EuCAP), 2015 9th European Conference on
Conference_Location :
Lisbon
