Determination of Single Knife Edge Equivalent Parameters for Double Knife Edge Diffraction Loss by Deygout Method

Isaac A. Ezenugu, Harrison Osasogie Edokpolor, Uwakwe Chikwado

Abstract


In this paper, the computation of dual knife edge diffraction loss by Deygout multiple knife edge diffraction loss method is presented for  a 6 GHz  C-band microwave link. Also,  the computation of equivalent  single knife edge obstruction that will replace the dual obstruction by giving the same diffraction loss as the dual obstructions is presented. The results shows that for the dual obstructions M1 and M2  the total diffraction loss is 54.57746 dB as computed by the Deygout method. The individual diffraction loss from obstructions M1 and M2 are  32.85901 dB and 21.71845 dB respectively. Furthermore, a single knife edge obstruction located at the middle of the link (a distance of 1275m from the transmitter and receiver) and with line of sight clearance height of 483.5089m will be give the same diffraction loss as the dual knife edge obstructions M1 and M2. Essentially, the line of sight clearance height of the equivalent single knife edge obstruction are much more than the sum of the line of sight clearance height of the two initial obstructions.

Keywords


Diffraction Loss; Diffraction Parameter; Dual Knife Edge Obstruction; Single Knife Edge; Equivalent Single Knife Edge; Deygout Method

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References


Corps, U. M. (1999). Antenna Handbook. Washington, DC.

Bardwell, J. (2003). Math and physics for the 802.11 wireless LAN engineer. Download from http://www.wildpackets.com/elements/whitepapers/math_physics_jbardwell. pdf (February 5th 2009).

Seybold, J. S. (2005). Introduction to RF propagation. John Wiley & Sons.

Wang, F. (2006). Physics-based modeling of wave propagation for terrestrial and space communications (Doctoral dissertation, The University of Michigan).

Seun, A. T. (2007). Mobile Satellite Communications (Doctoral dissertation, Blekinge Institute of Technology).

MacCartney Jr, G. R., Deng, S., Sun, S., & Rappaport, T. S. (2016). Millimeter-Wave Human Blockage at 73 GHz with a Simple Double Knife-Edge Diffraction Model and Extension for Directional Antennas. arXiv preprint arXiv:1607.00226.

Tuset‐Peiró, P., Anglès‐Vazquez, A., López‐Vicario, J., & Vilajosana‐Guillén, X. (2014). On the suitability of the 433 MHz band for M2M low‐power wireless communications: propagation aspects. Transactions on Emerging Telecommunications Technologies, 25(12), 1154-1168.

Rao, P.S. (2013) Performance Analysis of Diffraction Gain (Gd) Due to presence of Knife-Edge as Compared to Free Space E-Field and Identifying the Position of Obstacle in a Fresnel Zone. International Journal of Scientific and Research Publications, Volume 3, Issue 1, January 2013, 1-7.

Bassey, D. E., Akpan, A. O., & Udoeno, E. (2016). UHF Wave Propagation Losses Beyond 40 Percent Fresnel Zone Radius in South-South, Nigeria. International Journal of Science and Research (IJSR), 5(2), 470-475.

Akkaşlı, C. (2009). Methods for Path loss Prediction. Reports from MSI, School of Mathematics and Systems Engineering, Report, 9067.

Tyson, R. K. (2014). Fresnel and Fraunhofer diffraction and wave optics. In Principles and Applications of Fourier Optics. IOP Publishing, Bristol, UK, 3.1—3.14.

Pedrotti, L. S. (2008). Basic physical optics. Fundamentals of Photonics, 1.4., 152-154.

Bock, R. D. (2016). On the Conventionality of Simultaneity and the Huygens-Fresnel-Miller Model of Wave Propagation. arXiv preprint arXiv:1608.01544.

Östlin, E. (2009). On Radio Wave Propagation Measurements and Modelling for Cellular Mobile Radio Networks, Blekinge Institute of Technology Doctoral Dissertation Series No 2009:03.

Baldassaro, P. M. (2001). RF and GIS: Field Strength Prediction for Frequencies between 900 MHz and 28 GHz, Thesis, Blacksburg, Virginia.

Qing, L. (2005). GIS Aided Radio Wave Propagation Modeling and Analysis (Doctoral dissertation, Virginia Polytechnic Institute and State University).

Barclay, L. W. (2003). Propagation of radiowaves (Vol. 502). IET.

Lazaridis, P. I., Kasampalis, S., Zaharis, Z. D., Cosmas, J. P., Paunovska, L., & Glover, I. (2015, May). Longley-Rice model precision in case of multiple diffracting obstacles. In URSI Atlantic Conference, Canary Islands.

Bullington, K. (1947). Radio propagation at frequencies above 30 megacycles. Proceedings of the IRE, 35(10), 1122-1136.

Vargas, T. A. A., Peña, J. E. A., Medina, J. G. B., Pulido, J. D. Z., & Peñaloza, M. L. S. (2015, October). Configuration of propagation models for computational simulation of different telecommunications services. In Engineering Applications-International Congress on Engineering (WEA), 2015 Workshop on (pp. 1-6). IEEE.

Topcu, S., Goktas, P., Karasan, E., & Altintas, A. (2015, September). A new approach to diffraction modelling for line-of-sight (LOS) paths. In Antennas and Propagation in Wireless Communications (APWC), 2015 IEEE-APS Topical Conference on (pp. 696-699). IEEE.

Grecu, I. V., & Nicolaescu, M. (2016, June). Automatic propagation model tuning process in TETRA networks. In Communications (COMM), 2016 International Conference on (pp. 229-232). IEEE.

Göktas, P. (2015). Analysis and implementation of prediction models for the design of fixed terrestrial point-to-point systems (Doctoral dissertation, Bilkent University).

Kvicera, M., Pechac, P., Grabner, M., Kvicera, V., Valtr, P., & Martellucci, A. (2015). Experimental Study on Terrestrial Links Enhancement at 11 and 38 GHz. IEEE Transactions on Antennas and Propagation, 63(7), 3179-3186.

Malila, B., Falowo, O., & Ventura, N. (2015, September). Analysis of diffraction loss in NLOS small cell backhaul links deployed in urban canyons. In EUROCON 2015-International Conference on Computer as a Tool (EUROCON), 1-6.

Cadavid, A. N., Rojas, R. D. F., & Bernal, M. P. (2016, October). Digital terrestrial television measurement and coverage models comparison: Evaluation of measurements and simulations on urban enviroment for DVB-T2 signals. In Antennas and Propagation (APSURSI), 2016 IEEE International Symposium on (pp. 1257-1258). IEEE.

Deygout, J. (1961). Transmissions Multivoies par Faisceaux Hertziens. EAT (Montargis), titre III, Fasc, 1, 139-141.

Deygout J (1966) Multiple knife-edge diffraction of microwaves. IEEE Transactions on Antennas and Propagation vol AP-14, 4: 480-489.

Sizun, H., & de Fornel, P. (2005). Radio wave propagation for telecommunication applications. Heidelberg: Springer.

ITU-R P.526-13, Propagation by diffraction, Series of ITU-R Recommendations, Nov, 2013.


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