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| Question | Answer |
| What are the characteristics of RF | Wavelength Frequency Amplitude Phase |
| What is a wavelength | Distance between two successive crests or troughs Distance a single RF signal cycle travels |
| Wavelength formulas | Wavelength = 11.811/frequency |
| What is frequency | Number of times a specified event occurs within a specified time interval |
| RF Behaviors | Absorption Reflection Scattering Refraction Diffraction Attenuation FSPL Multipath Gain |
| What is reflection | Wave hitting a smooth surface larger than the wave and bounces in another direction |
| What is scattering | Multiple reflections |
| What is refraction | Signal that is bent Occurs when RF passes through a medium with a different density |
| What is diffraction | When RF bends around an object |
| What is FSPL | Free Space Path Loss Loss of signal strength caused by natural broadening of waves |
| What is multipath | Results in two or more paths of a signal arriving at the receiving antenna |
| What is delay spread | Part of multipath Time differential between multiple paths |
| What is upfade | Possible result of multipath Increased signal strength when multiple RF signals arrive at the same time and in phase |
| What is downfade | A possible result of multipath Decreased signal strength when multiple RF signals arrive at the receiver at the same time out of phase with the primary wave |
| What is nulling | Possible result of multipath When RF signal arrives at receiver at the same time and are 180 degrees out of phase with the primary wave thus causing signal cancellation |
| What is data corruption | Possible result of multipath When receiver has problems demodulating the RF signal |
| What is gain | Increase of amplitude Can be active or passive |
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