Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 11, Issue -, Pages 208-211Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2012.2187270
Keywords
Electromagnetic wave propagation mechanisms; Fresnel zone; path loss exponent; two-ray model
Funding
- NSFC [60830001]
- Beijing Natural Science Foundation [4112048]
- Fundamental Research Funds for the Central Universities [2010JBZ008]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0949]
- Program for New Century Excellent Talents in University [NCET-09-0206]
- State Key Lab of Rail Traffic Control and Safety [RCS2008ZZ006, RCS2008ZT005, RCS2010K008]
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In this letter, the underlying factor that leads to the change of path loss exponent is investigated, using a reasonable and reliable indirect demonstration that is based on the simple two-ray model and a developed multiray model. It is found that the first Fresnel zone is the underlying factor that affects. will change only if the situation of the obstacles in the first Fresnel zone changes. The conclusion helps to understand the essences of the propagation.
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