The Effect of Refractivity on Propagation at UHF and VHF Frequencies
This paper is using weather parameters to investigate the effect of refractivity on propagation in the first kilometer of the atmosphere over the English Channel for a long transhorizon path of 140 km. Different refractivity profiles are constructed based on meteorological data taken from the UK Met...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2016/4138329 |
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| author | I. Alam N. Mufti S. A. A. Shah M. Yaqoob |
| author_facet | I. Alam N. Mufti S. A. A. Shah M. Yaqoob |
| author_sort | I. Alam |
| collection | DOAJ |
| description | This paper is using weather parameters to investigate the effect of refractivity on propagation in the first kilometer of the atmosphere over the English Channel for a long transhorizon path of 140 km. Different refractivity profiles are constructed based on meteorological data taken from the UK Meteorological Office in order to investigate the effects of refractivity on propagation. The analysis is made for the hourly experimental path loss between the transmitter and receiver obtained from the experimental setup comprised of two communication links. The frequency of operation of the first link is 2015 MHz and that of the second link is 240 MHz. Parabolic equation method is modelled to get an hourly modelled path loss corresponding to each hourly experimental path loss to be analyzed for the said communication links. The correlation between the modelled path loss and experimental path loss is computed for refractivity distribution recommended by the ITU and predicted profiles. It is inferred from the simulated and experimental results that little or no influence exists by the evaporation duct upon path loss at 2015 MHz specifically for a long path of 140 km over the sea. |
| format | Article |
| id | doaj-art-a479f4c08a584375a5735d7617054be4 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-a479f4c08a584375a5735d7617054be42025-02-03T01:10:01ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772016-01-01201610.1155/2016/41383294138329The Effect of Refractivity on Propagation at UHF and VHF FrequenciesI. Alam0N. Mufti1S. A. A. Shah2M. Yaqoob3Department of Electrical Engineering, Bahria University, Shangrilla Road, Sector E-8, Islamabad, PakistanDepartment of Electrical Engineering, University of Engineering and Technology, Mardan Campus, Mardan, PakistanDepartment of Electrical Engineering, Bahria University, Shangrilla Road, Sector E-8, Islamabad, PakistanDepartment of Electrical Engineering, Bahria University, Shangrilla Road, Sector E-8, Islamabad, PakistanThis paper is using weather parameters to investigate the effect of refractivity on propagation in the first kilometer of the atmosphere over the English Channel for a long transhorizon path of 140 km. Different refractivity profiles are constructed based on meteorological data taken from the UK Meteorological Office in order to investigate the effects of refractivity on propagation. The analysis is made for the hourly experimental path loss between the transmitter and receiver obtained from the experimental setup comprised of two communication links. The frequency of operation of the first link is 2015 MHz and that of the second link is 240 MHz. Parabolic equation method is modelled to get an hourly modelled path loss corresponding to each hourly experimental path loss to be analyzed for the said communication links. The correlation between the modelled path loss and experimental path loss is computed for refractivity distribution recommended by the ITU and predicted profiles. It is inferred from the simulated and experimental results that little or no influence exists by the evaporation duct upon path loss at 2015 MHz specifically for a long path of 140 km over the sea.http://dx.doi.org/10.1155/2016/4138329 |
| spellingShingle | I. Alam N. Mufti S. A. A. Shah M. Yaqoob The Effect of Refractivity on Propagation at UHF and VHF Frequencies International Journal of Antennas and Propagation |
| title | The Effect of Refractivity on Propagation at UHF and VHF Frequencies |
| title_full | The Effect of Refractivity on Propagation at UHF and VHF Frequencies |
| title_fullStr | The Effect of Refractivity on Propagation at UHF and VHF Frequencies |
| title_full_unstemmed | The Effect of Refractivity on Propagation at UHF and VHF Frequencies |
| title_short | The Effect of Refractivity on Propagation at UHF and VHF Frequencies |
| title_sort | effect of refractivity on propagation at uhf and vhf frequencies |
| url | http://dx.doi.org/10.1155/2016/4138329 |
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