CWT CWT Antenna Systems & Site Surveys 2

Question 1

What is the free-space path loss (FSPL) principle and how does it affect wireless network design?

Accepted Answer

The natural attenuation of RF signals as they propagate through open air, increasing with distance and frequency

Answer

Free-space path loss is the reduction in signal strength as an RF wave travels through open air, increasing with both distance and frequency.

Question 2

A directional Yagi antenna is BEST suited for which deployment scenario?

Accepted Answer

Creating a point-to-point outdoor wireless bridge between two buildings

Answer

Yagi antennas concentrate RF energy in a narrow beam, making them ideal for point-to-point links where maximizing gain in one direction is critical.

Question 3

What does the term 'beamwidth' describe in the context of antenna specifications?

Accepted Answer

The angle in degrees between the half-power (-3 dB) points of an antenna's radiation pattern

Answer

Beamwidth is the angular measurement between the -3 dB points of an antenna's radiation pattern, indicating how focused or broad the coverage area is.

Question 4

What is multipath propagation and what problem can it cause in wireless networks?

Accepted Answer

RF signals arriving at a receiver via multiple reflected paths, potentially causing interference or fading

Answer

Multipath propagation occurs when reflected RF copies of a signal arrive at slightly different times, which can cause destructive interference and signal fading.

Question 5

Which tool is specifically designed to detect non-Wi-Fi interference sources such as microwave ovens and Bluetooth devices during a site survey?

Accepted Answer

Spectrum analyzer

Answer

A spectrum analyzer sweeps across radio frequencies to display all RF energy, including non-Wi-Fi sources that protocol analyzers cannot detect.

(CWT) Certified Wireless Technician Practice Test

(CWT) Certified Wireless Technician Practice Test

CWT CWT Antenna Systems & Site Surveys 2