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Journal of Communication Engineering
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Rashed-Mohassel, J., Razavi, S., Mohseni Armaki, S., Fartookzadeh, M. (2016). Coupling Effects and Performance of Loran Transmitter Antennas. Journal of Communication Engineering, 3(2), 81-94.
Jalil Rashed-Mohassel; Seyyed Mohamad Javad Razavi; Seyyed Hossein Mohseni Armaki; Mahdi Fartookzadeh. "Coupling Effects and Performance of Loran Transmitter Antennas". Journal of Communication Engineering, 3, 2, 2016, 81-94.
Rashed-Mohassel, J., Razavi, S., Mohseni Armaki, S., Fartookzadeh, M. (2016). 'Coupling Effects and Performance of Loran Transmitter Antennas', Journal of Communication Engineering, 3(2), pp. 81-94.
Rashed-Mohassel, J., Razavi, S., Mohseni Armaki, S., Fartookzadeh, M. Coupling Effects and Performance of Loran Transmitter Antennas. Journal of Communication Engineering, 2016; 3(2): 81-94.

Coupling Effects and Performance of Loran Transmitter Antennas

Article 2, Volume 3, Issue 2, Summer and Autumn 2014, Page 81-94  XML PDF (1285 K)
Authors
Jalil Rashed-Mohassel1; Seyyed Mohamad Javad Razavi2; Seyyed Hossein Mohseni Armaki2; Mahdi Fartookzadeh 2
1Center of Excellence on Applied Electromagnetic Systems, School of ECE, College of Engineering, Univ. of Tehran, P. O. Box 14395-515, Tehran, Iran.
2Department of Electrical and Electronics Engineering, Malek Ashtar University, P. O. Box 1774-15875, Tehran, Iran.
Abstract
It is known that if a conductor resides in the neighboring of an antenna with a small distance relative to the wavelength, it induces a reverse current on the conductor. This paper involves the unavoidable coupling effects on some common types of LF antennas, due to the large wavelength in this frequency band. In particular, after some discussions about top-loaded antennas, the coupling effect of wire supports is studied for these antennas. In addition, the effect of support masts on the radiation resistance is shown for three kinds of Loran transmitter antennas with four masts. Furthermore, some formulas for the impedance of small monopole antennas with neighboring masts are proposed and some simulation results of practical antennas are reported. Finally it is indicated that the coupling effect is more destructive for sectional Loran transmitter antenna compared with square top loaded antenna.
Keywords
Dipole antenna; LF antennas; monopole antenna; Wire antennas; Mutual coupling effects
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