This paper discusses signal intensity calculations for ionospheric HF radio waves using the geometrical optics approximation. To calculate the total signal intensity for an ionospheric channel, all the multipath and multimode amplitudes must be superimposed with their proper polarizations and phases. The basic method for calculating multipath interference with geometrical optics is presented. Using this method, the phenomenon of polarization fading is investigated and, in particular, the frequency-selective fading of a wideband HF channel due to the beating of the ordinary and extraordinary modes is calculated and compared with actual measured data.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.