UNIT 1 : RADIO WAVE PROPAGATION

UNIT 1

RADIO WAVE PROPAGATION 

SHORT ANSWER QUESTIONS :

1) Which layers of ionosphere exists in day time and night time?

2) Define EM wave ? effects of environment on EM wave (reflection, refraction,diffraction and                interference)

3) Limitations of ground wave?

3) Factors affect space wave propagation ?

4) Define refractive index , phase velocity?

5) Define reflection coefficient , actual height ?

ESSAY QUESTIONS :

1) Explain ground wave propagation with applications ? effects on ground wave propagation?

2) Explain sky wave propagation? short notes on layers of sky wave ?

3) Space wave propagation with applications ? 

4) Define a) Skip distance b) field strength c) virtual height d) MUF e) critical frequency

5) Short notes on i) DUCT propagation   ii) Tropospheric scatter propagation