CWT Antenna Systems & Site Surveys Flashcards
6 cards from real CWT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CWT Antenna Systems & Site Surveys flashcards as text
What is the primary purpose of conducting a wireless site survey before deploying a WLAN?
Answer: To identify RF coverage, interference, and optimal AP placement
A site survey identifies RF coverage gaps, interference sources, and optimal access point placement to ensure reliable wireless connectivity.
Which antenna type radiates power equally in all horizontal directions, making it ideal for open-area deployments?
Answer: Omnidirectional antenna
An omnidirectional antenna radiates RF energy uniformly in a 360-degree horizontal pattern, making it suitable for central placement in open environments.
What unit is used to measure antenna gain relative to an isotropic radiator?
Answer: dBi
dBi (decibels relative to isotropic) measures antenna gain compared to a theoretical isotropic radiator that radiates equally in all directions.
What does VSWR (Voltage Standing Wave Ratio) indicate in an antenna system?
Answer: The amount of RF power reflected due to impedance mismatch
VSWR measures the ratio of reflected to forward power caused by impedance mismatch between the antenna and transmission line, with 1:1 being ideal.
Which passive site survey method involves walking a facility with a device to record signal strength without any traffic generation?
Answer: Passive survey
A passive survey captures real-world RF signal levels by listening for existing Wi-Fi beacons without generating test traffic.
What is antenna polarization and why does it matter for wireless links?
Answer: The orientation of the electric field emitted by the antenna, which must match on both ends
Antenna polarization describes the orientation of the electric field; mismatched polarization between transmitter and receiver causes significant signal loss.