CWS Basic RF Principles Questions and Answers

Question 1

An RF signal travels between a transmitter and receiver.
As it propagates through the air, it encounters a large, smooth metal-paneled building.
Which of the following RF behaviors is MOST likely to occur?

Accepted Answer

Reflection

Answer

Absorption

Answer

Diffraction

Answer

Scattering

Question 2

A network technician is setting up a point-to-point wireless bridge between two buildings. To ensure a reliable link, they must account for the area around the visual line of sight that needs to be clear of obstructions. What is this area called?

Accepted Answer

The Fresnel Zone

Answer

The Azimuth Plane

Answer

The Radiation Pattern

Answer

The Beamwidth Area

Question 3

Which of the following units of measurement represents an absolute power level referenced to 1 milliwatt?

Accepted Answer

dBm

Answer

dBi

Answer

dB

Answer

dBd

Question 4

A wireless engineer notices that as the frequency of an RF signal increases, its wavelength __________.

Accepted Answer

decreases

Answer

increases

Answer

remains the same

Answer

becomes unstable

Question 5

What does a Voltage Standing Wave Ratio (VSWR) of 1:1 on an antenna system signify?

Accepted Answer

A perfect impedance match between the transmitter, cable, and antenna.

Answer

A complete signal reflection back to the transmitter.

Answer

The antenna is operating on the wrong frequency.

Answer

Maximum possible antenna gain is being achieved.

Question 6

An 802.11ac signal operating in the 5 GHz band will experience more of what compared to an 802.11g signal in the 2.4 GHz band, assuming both are transmitted at the same power over the same distance in free space?

Accepted Answer

Free Space Path Loss (FSPL)

Answer

Refraction

Answer

Phase shifting

Answer

Multipath propagation