WEEK ONE-THEORY HOMEWORK

 

1.                  Define the following terms:

a)      Parasitic Element:

b)      Director:

c)      Reflector:

d)      Phantom Antenna:

e)      Guy Wires:

1. Describe the three classifications of radio wave propagation and list the primary frequency bands for each.

 

 

 

 

 

 

2. Find the radio horizon distance of :
1. A transmitting antenna 115 m high.
2. A receiving antenna 70 m high.

 

1. Describe each of the layers of the ionosphere.

4. Describe:

1. Ionospheric disturbances.
2. Ionospheric storms.
3. Sunspot activity.
5. Define:
1. Critical frequency.
2. Critical angle.
3. Skip distance.
4. Skip zone.
5. Maximum usable frequency.
6. Lowest usable frequency.
7. Optimum usable frequency.

 

2.                  What is the relationship between antenna resonance and antenna wavelength?

3.                  Taking end effect into account what is the physical length in feet and meters of a half-wave dipole operating at:

a)      10 MHz

b)      90 MHz

c)      108 MHz

4.                  What is effective radiated power of a transmitter with an output of 50 watts of an antenna with a gain of 8 and 5 watts of line loss?

5.                  How can we improve SNR in a receiving antenna?