Question 1

Between the point where the ground wave is completely dissipated and the point where the fist sky wave returns is called:

Accepted Answer

A)  quiet zone 
B)  fading 
C)  skip zone 
D)  A and B 
E)  A and C 
A)  quiet zone 
B)  fading 
C)  skip zone 
D)  A and B 
E)  A and C D

Question 2

The characteristic impedance of free space is:

Accepted Answer

A)  75 ohms. 
B)  300 ohms. 
C)  50 ohms. 
D)  377 ohms. 
A)  75 ohms. 
B)  300 ohms. 
C)  50 ohms. 
D)  377 ohms. D

Question 3

The bending of electromagnetic waves due to its passing through regions of different densities is known as

Accepted Answer

A)  reflection 
B)  diffraction 
C)  radiation 
D)  refraction 
A)  reflection 
B)  diffraction 
C)  radiation 
D)  refraction D

Question 4

The polarization of an electromagnetic wave is determined by the direction of:

Accepted Answer

A)  H field. 
B)  B field. 
C)  E field. 
D)  all of the above 
A)  H field. 
B)  B field. 
C)  E field. 
D)  all of the above

Question 5

Calculate the figure of merit for an earth station with the following specifications: Antenna Gain: 31 Reflector Teq: 25
LNA Teq: 75
RX misc Teq: 2

Accepted Answer

A)  10.9 
B)  14.9 
C)  11.0 
D)  none of the above 
A)  10.9 
B)  14.9 
C)  11.0 
D)  none of the above

Question 6

The diffraction process allows reception beyond a mountain in all but a small area known as:

Accepted Answer

A)  dead zone. 
B)  masking. 
C)  open space. 
D)  shadow zone. 
A)  dead zone. 
B)  masking. 
C)  open space. 
D)  shadow zone.

Question 7

The C-band frequency range is approximately.

Accepted Answer

A)  2-4 GHz 
B)  1-2 GHz 
C)  12-18 GHz 
D)  4-8 GHz 
E)  8-12 GHz 
A)  2-4 GHz 
B)  1-2 GHz 
C)  12-18 GHz 
D)  4-8 GHz 
E)  8-12 GHz

Question 8

An electronic system performing the reception, frequency translation, and retransmission is called a:

Accepted Answer

A)  satellite 
B)  transponder 
C)  superheterodyne 
D)  TRF 
A)  satellite 
B)  transponder 
C)  superheterodyne 
D)  TRF

Question 9

The Ku band frequency range is approximately

Accepted Answer

A)  4-8 GHz 
B)  1-2 GHz 
C)  8-12 GHz 
D)  2-4 GHz 
E)  12-18 GHz 
A)  4-8 GHz 
B)  1-2 GHz 
C)  8-12 GHz 
D)  2-4 GHz 
E)  12-18 GHz

Question 10

RFI is:

Accepted Answer

A)  radiofrequency Interference 
B)  polarization 
C)  reactive 
D)  all of the above 
E)  none of the above 
A)  radiofrequency Interference 
B)  polarization 
C)  reactive 
D)  all of the above 
E)  none of the above

Question 11

A point in space that radiates equally in all directions is:

Accepted Answer

A)  isotropic Point source 
B)  parabolic reflector 
C)  an antenna 
D)  electromagnetic wave 
E)  none of the above 
A)  isotropic Point source 
B)  parabolic reflector 
C)  an antenna 
D)  electromagnetic wave 
E)  none of the above

Question 12

At resonance, the impedance of a crystal should be:

Accepted Answer

A)  maximum 
B)  minimum 
C)  variable 
D)  A and C 
E)  none of the above 
A)  maximum 
B)  minimum 
C)  variable 
D)  A and C 
E)  none of the above

Question 13

A term used to describe variations in signal strength that occur at a receiver during the time a signal is being received is known as:

Accepted Answer

A)  bouncing 
B)  refraction 
C)  fading 
D)  skipping 
A)  bouncing 
B)  refraction 
C)  fading 
D)  skipping

Question 14

A device that converts electrical energy into electromagnetic energy is known as:

Accepted Answer

A)  an antenna. 
B)  a light bulb. 
C)  a transducer. 
D)  all of the above. 
A)  an antenna. 
B)  a light bulb. 
C)  a transducer. 
D)  all of the above.

Question 15

The typical satellite orbits being used for the satellite radio service are

Accepted Answer

A)  polar 
B)  geostationary 
C)  inclined 
D)  A and B 
E)  B and C 
A)  polar 
B)  geostationary 
C)  inclined 
D)  A and B 
E)  B and C

Question 16

The perigee of a satellite orbit is

Accepted Answer

A)  closest point to earth 
B)  is the average distance to earth 
C)  farthest point from earth 
D)  none of the above 
A)  closest point to earth 
B)  is the average distance to earth 
C)  farthest point from earth 
D)  none of the above

Question 17

The highest frequency transmitted vertically under given ionosphere conditions that will be returned to the earth is called the:

Accepted Answer

A)  critical angle 
B)  damped frequency 
C)  critical frequency 
D)  reflected frequency 
E)  none of the above 
A)  critical angle 
B)  damped frequency 
C)  critical frequency 
D)  reflected frequency 
E)  none of the above

Question 18

The type of wave that is limited to line-of-sight transmission distances is:

Accepted Answer

A)  space wave. 
B)  ground wave. 
C)  sky wave. 
A)  space wave. 
B)  ground wave. 
C)  sky wave.

Question 19

The constant temperature stratosphere is also called the:

Accepted Answer

A)  sunspot region 
B)  perisphere 
C)  ionosphere 
D)  critical frequency 
E)  none of the above 
A)  sunspot region 
B)  perisphere 
C)  ionosphere 
D)  critical frequency 
E)  none of the above

Question 20

When a satellite is parked in orbit approximately 22,000 miles of the earth's surface, it is said to be in:

Accepted Answer

A)  geo-synchronous orbit 
B)  synchronous orbit 
C)  lunar orbit 
D)  A and C 
E)  A and B 
A)  geo-synchronous orbit 
B)  synchronous orbit 
C)  lunar orbit 
D)  A and C 
E)  A and B

Between the point where the ground wave is completely dissipated and the point where the fist sky wave returns is called:

The characteristic impedance of free space is:

The bending of electromagnetic waves due to its passing through regions of different densities is known as

The polarization of an electromagnetic wave is determined by the direction of:

Calculate the figure of merit for an earth station with the following specifications: Antenna Gain: 31 Reflector Teq: 25 LNA Teq: 75 RX misc Teq: 2

The diffraction process allows reception beyond a mountain in all but a small area known as:

The C-band frequency range is approximately.

An electronic system performing the reception, frequency translation, and retransmission is called a:

The Ku band frequency range is approximately

RFI is:

A point in space that radiates equally in all directions is:

At resonance, the impedance of a crystal should be:

A term used to describe variations in signal strength that occur at a receiver during the time a signal is being received is known as:

A device that converts electrical energy into electromagnetic energy is known as:

The typical satellite orbits being used for the satellite radio service are

The perigee of a satellite orbit is

The highest frequency transmitted vertically under given ionosphere conditions that will be returned to the earth is called the:

The type of wave that is limited to line-of-sight transmission distances is:

The constant temperature stratosphere is also called the:

When a satellite is parked in orbit approximately 22,000 miles of the earth's surface, it is said to be in:

Introductory Topics

Amplitude Modulation: Transmission

Amplitude Modulation: Reception

Single-Sideband Communications

Frequency Modulation: Transmission

Frequency Modulation: Reception

Communications Techniques

Digital Communications: Coding Techniques

Wired Digital Communications

Wireless Digital Communications

Network Communications

Transmission Lines

Antennas

Waveguides and Radar

Microwaves and Lasers

Television

Fiber Optics

Filters

Exam 13: Wave Propagation

Between the point where the ground wave is completely dissipated and the point where the fist sky wave returns is called:

The characteristic impedance of free space is:

The bending of electromagnetic waves due to its passing through regions of different densities is known as

The polarization of an electromagnetic wave is determined by the direction of:

Calculate the figure of merit for an earth station with the following specifications: Antenna Gain: 31 Reflector Teq: 25 LNA Teq: 75 RX misc Teq: 2

The diffraction process allows reception beyond a mountain in all but a small area known as:

The C-band frequency range is approximately.

An electronic system performing the reception, frequency translation, and retransmission is called a:

The Ku band frequency range is approximately

RFI is:

A point in space that radiates equally in all directions is:

At resonance, the impedance of a crystal should be:

A term used to describe variations in signal strength that occur at a receiver during the time a signal is being received is known as:

A device that converts electrical energy into electromagnetic energy is known as:

The typical satellite orbits being used for the satellite radio service are

The perigee of a satellite orbit is

The highest frequency transmitted vertically under given ionosphere conditions that will be returned to the earth is called the:

The type of wave that is limited to line-of-sight transmission distances is:

The constant temperature stratosphere is also called the:

When a satellite is parked in orbit approximately 22,000 miles of the earth's surface, it is said to be in:

Introductory Topics

Amplitude Modulation: Transmission

Amplitude Modulation: Reception

Single-Sideband Communications

Frequency Modulation: Transmission

Frequency Modulation: Reception

Communications Techniques

Digital Communications: Coding Techniques

Wired Digital Communications

Wireless Digital Communications

Network Communications

Transmission Lines

Antennas

Waveguides and Radar

Microwaves and Lasers

Television

Fiber Optics

Filters