CWDP CWDP Antenna Design and Placement 2

Question 1

In the US, the FCC limits maximum EIRP for point-to-multipoint 5 GHz outdoor links to which value?

Accepted Answer

36 dBm

Answer

30 dBm

Answer

40 dBm

Answer

53 dBm

Question 2

What is the half-power beamwidth (HPBW) of an antenna?

Accepted Answer

The angle at which the antenna gain drops to 3 dB below peak

Answer

The total angle covered by the antenna pattern

Answer

The angle between the two nulls in the radiation pattern

Answer

The beamwidth at which interference is eliminated

Question 3

A designer wants to mount antennas in the ceiling of a 10,000 sq ft warehouse. What spacing consideration is most critical?

Accepted Answer

Ensuring overlap of approximately 15–20% between cell edges

Answer

Keeping antennas at least 50 ft apart to avoid interference

Answer

Placing antennas only at perimeter walls

Answer

Avoiding any overlap to maximize channel reuse

Question 4

Which cable type is preferred for short indoor antenna runs to minimize insertion loss?

Accepted Answer

LMR-400

Answer

RG-58

Answer

RG-8

Answer

Cat6 coax

Question 5

What effect does each 3 dB increase in antenna gain have on the effective coverage radius (assuming free-space path loss)?

Accepted Answer

Increases radius by approximately 41%

Answer

Doubles the coverage radius

Answer

Triples the coverage radius

Answer

Has no effect on coverage radius

Question 6

Which antenna characteristic describes its ability to reject interference from directions outside its main lobe?

Accepted Answer

Front-to-back ratio

Answer

Beamwidth

Answer

Polarization diversity

Answer

Gain compression