Attenuation Due to Foliage Depth at 35 Ghz Prevailing in Desert Region of India
Indu Bhuria1, Rajeev Pourush2, D. R. Godara3
1Indu Bhuria, Department of ECE, Mody University of Science & Technology, Lakshmangarh (Rajasthan), India.
2Rajeev Pourush, Department of ECE, Mody University of Science & Technology, Lakshmangarh (Rajasthan), India.
3D.R Godara, Department of ECE, Government Polytechnic College, Bikaner (Rajasthan), India.
Manuscript received on 22 March 2019 | Revised Manuscript received on 05 April 2019 | Manuscript Published on 11 April 2019 | PP: 12-15 | Volume-8 Issue-4C, April 2019 | Retrieval Number: D24140484C19/19©BEIESP
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Abstract: Communication window, ka-band (28 to 42 GHz) is to be investigated for the various developing applications. In 5 G communications all the devices are being developed to use millimeter wave as medium of propagation as rest of the spectrum is getting exhausted day by day. 35 GHz frequency can be used to characterize the whole band. For LOS communication foliage is one of the main obstacle which can attenuate the signal. In this paper an attempt is made to specify the rate of attenuation due to cumulative effect of atmospheric gases and foliage in depth on the basis of observational studies. In autumn season, rate of attenuation up-to five trunks is 0.154 dBm per feet and it decreases to .062 dBm per feet if signal prevails through fourteen trunks. Similarly, if signal propagates through canopy area then rate of attenuation is 0.22 dBm per feet for first five tree canopies and it decreases to 0.095 dBm per feet as foliage depth increases to fourteen canopies. For spring season, rate of attenuation for first five canopies is 0.179 dBm per feet and for eleven canopies rate becomes 0.140 dBm per feet. This decrement in rate of attenuation is due to coherent interplays of field component due to collective scatterers. Rate of decrement suggests that there is possibility of 35 GHz to be used for communication applications. Attenuation in autumn is observed to be lesser then in other seasons as leaves density which can offer multiple scattering of field components is less.
Keywords: Attenuation, Foliage Depth, LOS Communication, Scattering, Millimeter wave.
Scope of the Article: Optical Communication