Radio Wave Propogation

Question 1

Radio wave propagation definition

Answer 1

“The behaviour of radio waves when they are transmitted or propagated from one point on earth to another, or into various parts of the atmosphere”

Question 2

Space wave los communication definition

Answer 2

“The transmission of electromagnetic waves that travel directly through the earths atmosphere with reflecting off the ground”

Question 3

3 types of radio wave propagation

Answer 3

Space wave propagation
Ground wave propagation
Sky wave propagation

Question 4

Space wave propagation characteristics

Answer 4

Signals travel in a straight line
Frequency range: >30MHz

Question 5

Ground wave propagation characteristics

Answer 5

Follows the curvature of the earth
Must be vertically polarised
Frequency range: >2MHz

Question 6

Sky wave propagation

Answer 6

Frequency range: 3 to 30 MHz
Signals radiated by antenna where they are bent back to earth

Question 7

Negative effects if multipath and fading

Answer 7

Makes received signal smaller

If phases add destructively, the signal relative to noise declines, making deflection more difficult.