Policy on Intellectual Property Right (IPR)
Annex 1
1 Introduction
2 Basic
concepts
2.1 Fresnel ellipsoids and Fresnel zones
2.2 Penumbra width
2.3 Diffraction zone
2.4 Obstacle surface smoothness criterion
2.5 Isolated obstacle
2.6 Types of terrain
2.7 Fresnel integrals
3 Diffraction
over a spherical Earth
3.1 Diffraction loss for over-the-horizon paths
3.1.1 Numerical
calculation
3.1.2 Calculation
by nomograms
3.2 Diffraction loss for any distance at 10 MHz and above
4 Diffraction
over isolated obstacles or a general terrestrial path
4.1 Single knife-edge obstacle
4.2 Single rounded obstacle
4.3 Double isolated edges
4.4 Multiple
isolated cylinders
4.5 Method for a general terrestrial path
4.5.1 Bullington
model
4.5.2 Complete
method
5 Diffraction
by thin screens
5.1 Finite-width screen
5.2 Diffraction by rectangular apertures and composite
apertures or screens
5.2.1 Diffraction
by a single rectangular aperture
5.2.2 Diffraction
by composite apertures or screens
6 Diffraction
over a finitely conducting wedge
7 Guide
to propagation by diffraction
Attachment 1 to Annex 1
Calculation of cylinder parameters
1 Diffraction
angle and position of vertex
2 Cylinder
parameters
Attachment 2 to Annex 1
Sub-path diffraction losses
1 Introduction
2 Method