Theory and experiment validation of radio wave propagation in the forest and its application for extended frequency

Author

Zhang Lijun ; Tian Yushu

Author_Institution

Nat. Key Lab. of Electromagn. Environ., China Res. Inst. of Radio-wave Propagation, Qingdao, China

fYear

2012

fDate

22-26 Oct. 2012

Firstpage

531

Lastpage

534

Abstract

A theoretical model for vertical polarized radio wave propagation in the forest is given in this paper. The propagation modes consist of directive wave and reflect wave in the air-forest interface and reflect wave in the forest-ground interface and lateral wave propagating along the upper interface in the air. The expressions of them are given here and the propagation loss can be derived easily from them. And we validate them in the VHF and UHF band using the experiment data measured in typical forest of Central China. Also we extend the formula to the higher frequency such as 1800MHz and 3500MHz. The initial distance where the lateral wave begins to be the predominant propagation mechanism in higher frequency is different from VHF and UHF frequency. It is 600m in 1800MHz and 3500MHz while it is 350m in VHF and UHF band.

Keywords

UHF radio propagation; VHF radio propagation; forestry; losses; Central China; UHF frequency band; VHF frequency band; air-forest interface; directive wave propagation; distance 350 m; distance 600 m; forest-ground interface; frequency 1800 MHz; frequency 3500 MHz; lateral wave propagation; predominant propagation mechanism; propagation loss; reflect wave propagation; upper air interface; vertical polarized radiowave propagation; Frequency measurement; Loss measurement; Predictive models; Propagation losses; UHF measurements; Vegetation;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas, Propagation & EM Theory (ISAPE), 2012 10th International Symposium on

Conference_Location

Xian

Print_ISBN

978-1-4673-1799-3

Type

conf

DOI

10.1109/ISAPE.2012.6408825

Filename

6408825