CWNA-106 Exam Dumps : Certified Wireless Network Administrator

The lower the gain of an antenna, the more narrow one or both beamwidths become.

The beamwidth patterns on an antenna polar chart indicate the point at which the RF signal stops propagating.

Horizontal and vertical beamwidth are calculated at the points in which the main lobe decreases power by 3 dB.

Horizontal beamwidth is displayed (in degrees) on the antenna’s Azimuth Chart.

Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.

The Fade Margin of a long-distance radio link should be equivalent to the receiver’s antenna gain.

A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnel zone is clear of obstructions.

The Fade Margin is a measurement of signal loss through free space, and is a function of frequency and distance.

A Voltage Standing Wave Ratio (VSWR) of 1:1

An impedance mismatch between components in the RF system

Cross-polarization of the RF signal as it passes through the RF system

The use of cables longer than one meter in the RF system

High output power at the transmitter and use of a low-gain antenna