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Test your basic knowledge |
CWNA Radio Frequency Signal And Antenna Concepts
Start Test
Study First
Subjects
:
cisco
,
it-skills
,
cwna
Instructions:
Answer 25 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Takes an RF signal and divides it into two or more separate signals
antenna polarization
sector antenna
splitters
ighly-directional antenna
2. An antenna that consists of two elements. A half-wave type antenna consists of two elements - each 1/4 of the wavelength long
sector antenna
dipole antenna
patch antenna
phased array antenna
3. A highly-directional antenna taht resembles the rectangular grill of a barbeque - with the edges slightly curved inward. The spacing of the wries on this is determined by the wavelength of the frequencies that the antenna is designed for
lightening arrestor
grid
patch antenna
panel antenna
4. Strictly used for point-to-point communications - typicall to provide network bridging between two buildings. These provide the most focused - narrow beamwidth of any of the antenna types. There are two types of these: parabolic dish and grid
ighly-directional antenna
voltage standing wave ratio (VSWR)
Fresnel zone
dipole antenna
5. When an access point has two antennas and receivers functioning together to minimize the negative effects of multipath
attenuator
dipole antenna
lightening arrestor
antenna diversity
6. A highly-directional antenna that is similiar to the small digital satellite TV antennas that can be seen on the roofs of many houses
parabolic dish antenna
attenuator
back lobe
splitters
7. A device that redirects (shunts) transient currents caused by nearby lighting strikes or ambient static away from your electronic equipment and into the ground
semi-directional antenna
antenna diversity
voltage standing wave ratio (VSWR)
lightening arrestor
8. When light travels from one point to another - it travels across What is perceived to be an unobstructed straight line
line of sight (LOS)
patch antenna
splitters
grid
9. A numerical relationship between the measurement of the maximum voltage along the line (what is generated by the transmitter) and the measurement of the mimimum voltage along the line (what is received by the antenna)
ighly-directional antenna
back lobe
splitters
voltage standing wave ratio (VSWR)
10. Labeled E-plane - shows the side view of the radiation pattner of the antenna
elevation charts
beamwidth
dipole antenna
antenna polarization
11. An imaginary football-shaped area that surrounds the path of the visual LOS between two point-to-point antennas
Fresnel zone
earth bulge
lightening arrestor
sector antenna
12. A type of semi-directional planar antenna designed to direct a signal in a specific direction.
phased array antenna
elevation charts
patch antenna
grid
13. Small devices about the size of a C-cell battery - with cable connectors on both sides. They absorb energy - decreasing the signal as it travels through. Fixed types provide a set amount of loss. Variable loss types have a dial on it that allows you
attenuator
semi-directional antenna
beamwidth
lightening arrestor
14. The orientation of the antenna. Antennas radiate RF signals with the amplitude of the waves fluctuating either vertically or horizontally
antenna diversity
omni-directional antenna
antenna polarization
attenuator
15. Refers to the the back of an antenna
grid
azimuth charts
omni-directional antenna
back lobe
16. Any RF communications system that has multiple antennas at both ends of the communications link and being used concurrently
multiple input multiple output (MIMO)
yagi
ighly-directional antenna
earth bulge
17. The measurement of how broad or narrow the focus of an antenna is. Measured both horizontally and vertically
beamwidth
azimuth charts
lightening arrestor
parabolic dish antenna
18. A type of antenna that radiates RF signals in all directions
antenna polarization
omni-directional antenna
lightening arrestor
multiple input multiple output (MIMO)
19. Labeled H-plane - shows the top-down view of the radiation pattern of the antenna
panel antenna
azimuth charts
patch antenna
line of sight (LOS)
20. An antenna system made up of multiple antennas that are connected to the signal processor.
voltage standing wave ratio (VSWR)
phased array antenna
beamwidth
attenuator
21. Starts with a y. A type of semi-directional antenna designed to direct a signal in a specific direction. Used for short to medium-distance communication
dipole antenna
semi-directional antenna
parabolic dish antenna
yagi
22. The curvature of the earth - which must be considered when installing long distance point-to-point RF communications
beamwidth
earth bulge
ighly-directional antenna
yagi
23. A special type of high-gain - semi-directional antenna that provide a pie-shaped coverage pattern
earth bulge
sector antenna
antenna polarization
lightening arrestor
24. A type of semi-directional planar antenna designed to direct a signal in a specific direction. Used for short-to medium-distance communications
parabolic dish antenna
panel antenna
splitters
Fresnel zone
25. A type of antenna that is designed to direct a signal in a specifi direction
ighly-directional antenna
semi-directional antenna
Fresnel zone
attenuator