Quantifying Wet Antenna Attenuation in 38-GHz Commercial Microwave Links of Cellular Backhaul
| Autor: | Martin Fencl, Vojtech Bares, Milan Kvicera, Pavel Valtr |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Backhaul (telecommunications)
Cumulative distribution function Attenuation 0211 other engineering and technologies Environmental science Soil science 02 engineering and technology Electrical and Electronic Engineering Antenna (radio) Geotechnical Engineering and Engineering Geology Area measurement Microwave 021101 geological & geomatics engineering |
| Zdroj: | IEEE Geoscience and Remote Sensing Letters. 16:514-518 |
| ISSN: | 1558-0571 1545-598X |
| Popis: | The quantification of wet antenna attenuat-ion (WAA) represents one of the major uncertainties in rainfall retrieval from commercial microwave links (CMLs). We propose identifying WAA distribution and upper limits based on rainfall climatology without the need for nearby rainfall observations. The quantified contributions of antenna wetting due to total loss are derived from 2 years of data collected from eight short (48–497 m) CMLs operating at frequencies of 37.3–39.2 GHz within the cellular backhaul. More specifically, the complementary cumulative distribution functions of measured attenuation are compared with theoretical ones calculated from rainfall data from local rain gauges. The results show that WAA reaches 1.5–2.0 dB and dominates over path attenuation during light rainfalls ( $R mm/h). WAA can, however, reach 2.8–5.3 dB during heavy rainfalls and maximal WAA observed during extreme rainfalls ( $R \approx 70$ –130 mm/h) is between 6–9 dB. The constant value of WAA used in some previous studies may, therefore, lead to a significant overestimation of peak rainfalls retrieved from CMLs. |
| Databáze: | OpenAIRE |
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