CWS CWS Basic RF Principles 2

Question 1

A wireless signal at 5 GHz has approximately what wavelength in free space?

Accepted Answer

6 cm

Answer

12 cm

Answer

3 cm

Answer

60 cm

Question 2

Which RF propagation phenomenon occurs when a signal bends around the edge of an obstacle?

Accepted Answer

Diffraction

Answer

Reflection

Answer

Scattering

Answer

Absorption

Question 3

Converting 100 mW to dBm gives which value?

Accepted Answer

20 dBm

Answer

10 dBm

Answer

30 dBm

Answer

100 dBm

Question 4

What effect does increasing channel width from 20 MHz to 40 MHz have on throughput and noise?

Accepted Answer

Higher throughput and higher noise floor

Answer

Higher throughput and lower noise floor

Answer

Lower throughput and higher noise floor

Answer

No change in either

Question 5

In RF terminology, what does EIRP stand for?

Accepted Answer

Effective Isotropic Radiated Power

Answer

Equivalent Integrated RF Power

Answer

Effective Internal Radiated Power

Answer

Equivalent Isotropic Received Power

Question 6

Which type of antenna radiates RF energy equally in all directions in the horizontal plane?

Accepted Answer

Omnidirectional

Answer

Directional

Answer

Yagi

Answer

Parabolic

Question 7

Free-space path loss (FSPL) increases as frequency increases because:

Accepted Answer

Higher-frequency signals spread over a larger effective area relative to antenna size

Answer

Higher frequencies travel faster and lose more energy

Answer

Higher frequencies are more susceptible to absorption by oxygen

Answer

Higher frequencies require more power to generate