Reflection and scattering from rough surfaces

Reflection and scattering from rough surfaces

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Radiowaves are reflected by the ground and from objects such as buildings. This can have various effects on radio systems. Reflections from buildings, etc., can permit a radio service to exist where the signal would otherwise be excessively attenuated by shadowing. Conversely, reflections can cause interference where shadowing alone would provide adequate attenuation of an unwanted signal. Reflections are also a major cause of multipath propagation. This can sometimes be exploited, particularly in a mobile radio system using code division multiple access (CDMA). For point-to-point links, on the other hand, ground reflections are generally viewed as an impairment, and every effort is made to minimise their effect.

Inspec keywords: electromagnetic wave reflection; radio links; electromagnetic wave scattering; code division multiple access; radiowave propagation; rough surfaces

Other keywords: point-to-point links; code division multiple access; radiowaves propagation; scattering; rough surfaces; reflection; multipath propagation

Subjects: Electromagnetic waves: theory; Radiowave propagation; Radio links and equipment

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