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| Question | Answer |
| What is azimuth chart | H-Plane Top-down view of the radiation pattern of an antenna |
| What is the elevation chart | E-Plane Side view of the radiation of an antenna |
| What is the beamwidth | Measures how broad or narrow the focus of an antenna is |
| What is an omnidirectional antenna | RF radiates coverage in all directions |
| What is a semidirectional antenna | RF radiates similar to a wall sconce. Directional across a large area |
| What is a highly directional antenna | Radiates RF similar to a spotlight focusing light |
| What are sector antennas | High gain semidirectional antennas Providing coverage in a pie-shape Also known as sectorized array |
| What is static beamforming | Directional antennas in a fixed radiation pattern |
| What is dynamic beamforming | Focused RF energy in a specific directional Radiation pattern can change per frame |
| What is transmit beamforming | Transmits multiple phase-shifted signals Either implicit or explicit Introduced in 802.11n |
| What is implicit transmit beamforming | Use of implicit channel-sounding process to optimize phase differentials |
| What is explicit transmit beamforming | Requires feedback from the station to determine amount of phase-shift required for each signal Defined in 802.11ac |
| What is the fresnel zone | Area surrounding the path of visual line of sight between two point-to-point antennas |
| First Fresnel zone | Closest ellipsoid |
| What is Earth bulge | For antennas more than 7 miles away Impedes on Fresnel zone |
| What is antenna polarization | Alignment of antenna Should be oriented same way as the receiving antenna for strongest signal |
| What is antenna diversity | Helps compensate for multipath AP w/ two or more antennas to minimize multipath |
| MIMO | Multiple-Input, Multiple-Output Antenna diversity Takes advantage of multipath |
| VSWR | Voltage Standing Wave Ratio Measurement of change in impedances to an AC signal |
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