Measurements using Optic and RF Waves

Chapter 7Ambient RF Electromagnetic Measurementsin a Rural Environment¹

 

 

 

7.1. Introduction

The electromagnetic measurements presented hereafter are typical examples of radioelectrical power observed in a rural environment. Located at 48 ° 47′ 07″ North latitude and 3 ° 31′ 05″ West longitude, the site where the measurements were taken is close to the Radome in Pleumeur Bodou, which shelters the first telecommunication by satellite antenna (Figure 7.1) and about 1 km from the small town of Pleumeur Bodou (3,800 inhabitants) and from the emitter.

Near to where the measurements are taken, there are no trains, motorways, broadcast/television transmitters or airports. We can consider this place, at least in terms of electromagnetic direction as a very ordinary place such as one can find in all the rural sites of the world.

The aim of these measurements was to evaluate the radioelectrical power of the local emitters and to detect the possible non-linearity causes due to powerful local emitters.

Figure 7.1. View of the site of measurements: it is close to the Radome of Pleumeur Bodou which shelters the first antenna of telecommunication by satellite

The frequency bands analysis method is used. It consists of performing a frequency scan through the electromagnetic spectrum using a spectral analyzer. It allows us to examine and to display the signal spectral composition. The frequency ...