Radio Propagation Theory

Question 1

What direction does a refracted wave bend in? When is it greatest?

Answer 1

Towards denser, low frequencies

Question 2

When is diffraction greatesT?

Answer 2

low frequencies cause large wavelength will get comparable size easily

Question 3

When is attenuation greatest for

Atmosphere

Surface

Ionosphere

Answer 3

Atmosphere - High Frequency

Surface - High Frequency

Ionosphere - Low Frequency

Question 4

Range of radio over sea and land

Answer 4

Sea = 3 * root power

Land = 2 * root power

Question 5

When is static noise worst?

Answer 5

Lower freq

Question 6

Line of sight range

Answer 6

1.25 x (root H tx x H rx)

Question 7

What happens in night effect

Answer 7

increases skip distance and dead space

Question 8

what is solution of night effect?

Answer 8

Make freq half

Question 9

The maximum distance of the first returning sky wave is: (E layer)

Answer 9

1500 nm

Question 10

The approximate maximum range of ground waves of LF and MF a

Answer 10

1000 nm, 300 nm

Question 11

lowest frequency where freedom from static interference can be guaranteed?

Answer 11

30 MHz