Nonreciprocal characteristics of a 1500 km HF ionospheric path
- 1 March 1967
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IEEE
- Vol. 55 (3) , 426-427
- https://doi.org/10.1109/PROC.1967.5516
Abstract
The reciprocity theorem of electromagnetism is not generally true for ionospheric propagation paths, and this has been demonstrated from time to time since the earliest days of HF radio. In the past ten years, particularly, significant progress in understanding the characteristics of HF nonreciprocity has been made by various workers who have studied the two-way fading of pulsed signals propagated by single ionospheric paths. Meadows [1956] and Balser, Smith, and Warren [1958] observed correlated two-way fading of E and F layer signals but on other occasions the two-way fading was uncorrelated. Jull ind Pettersen [1964] found the two-way fading of F layer signals transmitted between horizontal antennas was almost inversely correlated when both ordinary o and extraordinary e waves were present in the signal. When only one wave was present in the signal, the two-way fading was correlated. These latter results were interpreted on the basis of a recent ray theory of reciprocity [1964]. This letter presents evidence to show that ray theory can also account for the nonreciprocal characteristics of a 1500 km path between Atlanta, Ga. (33'45'N., 84O, 3O'W), and Ipswich, Mass. (42" 45'N., 70" 45'W.).Keywords
This publication has 7 references indexed in Scilit:
- Short-term and averaged characteristics of nonreciprocal HF ionospheric pathsIEEE Transactions on Antennas and Propagation, 1967
- Origin of Non-reciprocity on High-frequency Ionospheric PathsNature, 1964
- RECIPROCITY AND NONRECIPROCITY WITH MAGNETOIONIC RAYSCanadian Journal of Physics, 1964
- On the reciprocity of HF ionospheric transmissionJournal of Geophysical Research, 1958
- An experimental test of reciprocal transmission over two long-distance high-frequency radio circuitsProceedings of the IEE - Part B: Radio and Electronic Engineering, 1956
- An experiment to test the reciprocal radio transmission conditions over an ionospheric path of 740 kmProceedings of the IEE - Part B: Radio and Electronic Engineering, 1956
- Reciprocal Theorems in Radio CommunicationProceedings of the IRE, 1929