Characteristic Wave Diversity In Near Vertical Incidence Skywave Propagation
2015 9TH EUROPEAN CONFERENCE ON ANTENNAS AND PROPAGATION (EUCAP)(2015)
摘要
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.
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关键词
propagation, measurement, ionosphere, polarization, fading, diversity, characteristic wave
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