Knife edge attenuation

Autor/a, Autores/as: Lorenzo Rubio Arjona

The figure shows the attenuation of the knife-edge diffraction in terms of the Fresnel diffraction parameter. Based on the geometrical parameters of the radio link (e.g., distances from the transmitter (TX) and receiver (RX) to the knife-edge possition, denoted by d1 and d2, respectively; the excess height of the edge above the straight line from the TX to the RX, denoted by H, and the frequency), the knife-edge attenuation is also derived.

The range of the radio link parameters used in the calculation of the knife-edge attenuation are the following:
d1 and d2: From 100 m to 10 km.
H: From -20 to 20 m. (H > 0 for line-of-sight and H < 0 for non-line-of-sight).
Frequency: From 100 MHz to 10 GHz.

GOAL:
The figure shows and calculate the knife-edge attenuation based on the Fresnel diffraction parameter.

INTRODUCTION:
This figure shows the attenuation of the knife-edge diffraction in terms of the Fresnel diffraction parameter and based on the main geometrical parameters of the radio link .

INSTRUCTIONS:
Enter the geometrical parameters of the radio link involved in the Fresnel diffraction parameter to derive the knife-edge attenuation.

Laboratorio virtual

TX to Knife-edge distance, d1, (m) Knife-edge to RX distance, d2, (m) Excess height of the knife-edge, H, (m) Frequency (MHz)