Height-gain experimental data for groundwave propagation: 2, Heterogeneous paths
Article first published online: 7 DEC 2012
Copyright 1973 by the American Geophysical Union.
Volume 8, Issue 1, pages 17–22, January 1973
How to Cite
1973), Height-gain experimental data for groundwave propagation: 2, Heterogeneous paths, Radio Sci., 8(1), 17–22, doi:10.1029/RS008i001p00017., , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Received: 14 APR 1972
Analytical as well as experimental height-gain studies for mixed-path groundwave propagation are virtually nonexistent. Therefore, it was shown how the theoretical height-gain for a homogeneous path relates to heterogeneous-path experimental measurements versus height and distance. The results show that the magnitude of a groundwave field which crosses an abrupt boundary rapidly acquires the characteristic properties of the second medium, and the field over a heterogeneous surface attenuates at essentially the same rate as the field on the surface. The groundwave which has crossed an abrupt boundary can be predicted for small heights above the surface by simply multiplying the well-established mixed-path theory for antennas located on the surface by appropriate homogeneous-path height-gain factors corresponding to the local surface impedance, provided the field is predominantly a surface wave.