Question 1

What is the name of the portion of field energy that does collapse back into the antenna and is limited to the zone immediately surrounding the antenna?

Accepted Answer

A) Radiation 
B) Far 
C) Near 
D) Induction 
A) Radiation 
B) Far 
C) Near 
D) Induction D

Question 2

Antenna gain is always expressed in terms of the ______________________.

Accepted Answer

A) angular separation between the half-power points on its radiation pattern 
B) direction of maximum radiation 
C) presence of reactive components 
D) charge lines developing around the antenna 
A) angular separation between the half-power points on its radiation pattern 
B) direction of maximum radiation 
C) presence of reactive components 
D) charge lines developing around the antenna B

Question 3

An antenna with a purely resistive impedance exhibits what condition?

Accepted Answer

A) Resistance 
B) Distance 
C) Resonance 
D) Capacitance 
A) Resistance 
B) Distance 
C) Resonance 
D) Capacitance C

Question 4

The key reasons for the popularity of a parabolic reflector are its high gain and ___________.

Accepted Answer

A) directivity 
B) simplicity 
C) low cost 
D) bandwidth 
A) directivity 
B) simplicity 
C) low cost 
D) bandwidth

Question 5

___________ represent a cross-sectional view and attempt to show the three-dimensional radiation pattern in two dimensions.

Accepted Answer

A) Longley-Rice models 
B) Polar plots 
C) Path studies 
D) Fade margins 
A) Longley-Rice models 
B) Polar plots 
C) Path studies 
D) Fade margins

Question 6

An antenna array is one that has more than one element or component. What is the name of the array if one or more of the elements is not electrically connected?

Accepted Answer

A) Parasitic 
B) Driven 
C) Collinear 
D) Broadside 
A) Parasitic 
B) Driven 
C) Collinear 
D) Broadside

Question 7

Because microwave communications are line of sight,what must be made to ensure that no obstructions lie anywhere in the line between transmitter and receiver?

Accepted Answer

A) Yagi-Uda configuration 
B) Polar pattern 
C) Path study 
D) Link-budget analysis 
A) Yagi-Uda configuration 
B) Polar pattern 
C) Path study 
D) Link-budget analysis

Question 8

Antenna bandwidth is defined with respect to its design _____________.

Accepted Answer

A) frequency 
B) components 
C) complexity 
D) directivity 
A) frequency 
B) components 
C) complexity 
D) directivity

Question 9

Which of the following terms defines the orientation of the electric field,which is the same as the antenna's physical configuration?

Accepted Answer

A) Reciprocity 
B) Beamwidth 
C) Resonance 
D) Polarization 
A) Reciprocity 
B) Beamwidth 
C) Resonance 
D) Polarization

Question 10

The property of interchangeability for transmitting and receiving operations is antenna ____________.

Accepted Answer

A) polarization 
B) frequency 
C) reciprocity 
D) impedance 
A) polarization 
B) frequency 
C) reciprocity 
D) impedance

Question 11

The monopole antenna is used primarily with frequencies below __________.

Accepted Answer

A) 2 MHz 
B) 100 MHz 
C) 50 MHz 
D) 55 MHz 
A) 2 MHz 
B) 100 MHz 
C) 50 MHz 
D) 55 MHz

Question 12

What is the loop antenna's major application?

Accepted Answer

A) Good gain over extremely wide range of frequencies 
B) Broadcast AM receivers 
C) Receiving antenna for broadcast FM 
D) Direction finding 
A) Good gain over extremely wide range of frequencies 
B) Broadcast AM receivers 
C) Receiving antenna for broadcast FM 
D) Direction finding

Question 13

There are three basic forms of horn antennas: sectoral,circular,and ______________.

Accepted Answer

A) pyramidal 
B) horizontal 
C) vertical 
D) symmetrical 
A) pyramidal 
B) horizontal 
C) vertical 
D) symmetrical

Question 14

All radio systems must be designed to be resistant to fading. What is one of the biggest factors that would cause reductions in signal strength?

Accepted Answer

A) Antenna size 
B) Weather 
C) Noise 
D) Dry heat 
A) Antenna size 
B) Weather 
C) Noise 
D) Dry heat

Question 15

Which of the following consists of a structure made of wire erected a short distance above the ground and insulated from the ground?

Accepted Answer

A) Loading coil 
B) Counterpoise 
C) Feed line 
D) Transducer 
A) Loading coil 
B) Counterpoise 
C) Feed line 
D) Transducer

Question 16

What does the most basic form of an antenna consist of?

Accepted Answer

A) Single conductor 
B) Electric field 
C) Reflector 
D) Amplifier 
A) Single conductor 
B) Electric field 
C) Reflector 
D) Amplifier

Question 17

What results when the gain of an antenna is multiplied by its power input?

Accepted Answer

A) Effective radiated power 
B) Effective isotropic radiated power 
C) Received power 
D) Transmitter output power 
A) Effective radiated power 
B) Effective isotropic radiated power 
C) Received power 
D) Transmitter output power

Question 18

What is one advantage of connecting a resonant transmission line to an antenna?

Accepted Answer

A) It decreases power losses. 
B) Its electrical length corresponds closely to its physical length. 
C) It is an effective resistance related to the power radiated by the antenna. 
D) It makes impedance matching unnecessary. 
A) It decreases power losses. 
B) Its electrical length corresponds closely to its physical length. 
C) It is an effective resistance related to the power radiated by the antenna. 
D) It makes impedance matching unnecessary.

Question 19

Dish antennas are capable of very high signal gains by focusing energy onto a very narrow ___________.

Accepted Answer

A) beamwidth 
B) bandwidth 
C) current 
D) transmission line 
A) beamwidth 
B) bandwidth 
C) current 
D) transmission line

Question 20

___________ is the angular separation between the half-power points on an antenna's radiation pattern.

Accepted Answer

A) Bandwidth 
B) Gain 
C) Beamwidth 
D) Resonance 
A) Bandwidth 
B) Gain 
C) Beamwidth 
D) Resonance

What is the name of the portion of field energy that does collapse back into the antenna and is limited to the zone immediately surrounding the antenna?

Antenna gain is always expressed in terms of the ______________________.

An antenna with a purely resistive impedance exhibits what condition?

The key reasons for the popularity of a parabolic reflector are its high gain and ___________.

___________ represent a cross-sectional view and attempt to show the three-dimensional radiation pattern in two dimensions.

An antenna array is one that has more than one element or component. What is the name of the array if one or more of the elements is not electrically connected?

Because microwave communications are line of sight,what must be made to ensure that no obstructions lie anywhere in the line between transmitter and receiver?

Antenna bandwidth is defined with respect to its design _____________.

Which of the following terms defines the orientation of the electric field,which is the same as the antenna's physical configuration?

The property of interchangeability for transmitting and receiving operations is antenna ____________.

The monopole antenna is used primarily with frequencies below __________.

What is the loop antenna's major application?

There are three basic forms of horn antennas: sectoral,circular,and ______________.

All radio systems must be designed to be resistant to fading. What is one of the biggest factors that would cause reductions in signal strength?

Which of the following consists of a structure made of wire erected a short distance above the ground and insulated from the ground?

What does the most basic form of an antenna consist of?

What results when the gain of an antenna is multiplied by its power input?

What is one advantage of connecting a resonant transmission line to an antenna?

Dish antennas are capable of very high signal gains by focusing energy onto a very narrow ___________.

___________ is the angular separation between the half-power points on an antenna's radiation pattern.

Fundamental Communications Concept

Amplitude Modulation

Angle Modulation

Communications Circuits

Transmitters

Receivers

Digital Communications Techniques

Digital Modulation and Demodulation

Telephone Networks

Wireless Communications Systems

Computer Communication and the Internet

Transmission Lines

Wave Propagation

Waveguides and Radar

Fiber Optics

Filters

Exam 14: Antennas

What is the name of the portion of field energy that does collapse back into the antenna and is limited to the zone immediately surrounding the antenna?

Antenna gain is always expressed in terms of the ______________________.

An antenna with a purely resistive impedance exhibits what condition?

The key reasons for the popularity of a parabolic reflector are its high gain and ___________.

___________ represent a cross-sectional view and attempt to show the three-dimensional radiation pattern in two dimensions.

An antenna array is one that has more than one element or component. What is the name of the array if one or more of the elements is not electrically connected?

Because microwave communications are line of sight,what must be made to ensure that no obstructions lie anywhere in the line between transmitter and receiver?

Antenna bandwidth is defined with respect to its design _____________.

Which of the following terms defines the orientation of the electric field,which is the same as the antenna's physical configuration?

The property of interchangeability for transmitting and receiving operations is antenna ____________.

The monopole antenna is used primarily with frequencies below __________.

What is the loop antenna's major application?

There are three basic forms of horn antennas: sectoral,circular,and ______________.

All radio systems must be designed to be resistant to fading. What is one of the biggest factors that would cause reductions in signal strength?

Which of the following consists of a structure made of wire erected a short distance above the ground and insulated from the ground?

What does the most basic form of an antenna consist of?

What results when the gain of an antenna is multiplied by its power input?

What is one advantage of connecting a resonant transmission line to an antenna?

Dish antennas are capable of very high signal gains by focusing energy onto a very narrow ___________.

___________ is the angular separation between the half-power points on an antenna's radiation pattern.

Fundamental Communications Concept

Amplitude Modulation

Angle Modulation

Communications Circuits

Transmitters

Receivers

Digital Communications Techniques

Digital Modulation and Demodulation

Telephone Networks

Wireless Communications Systems

Computer Communication and the Internet

Transmission Lines

Wave Propagation

Waveguides and Radar

Fiber Optics

Filters