CWNA®: Certified Wireless Network Administrator Official Study Guide

Chapter 3. Radio Frequency Components, Measurements, and Mathematics

IN THIS CHAPTER, YOU WILL LEARN ABOUT THE FOLLOWING:

• Components of RF communications

  • Transmitter

  • Receiver

  • Antenna

  • Isotropic radiator

  • Intentional radiator (IR)

  • Equivalent isotropically radiated power (EIRP)

• Units of power and comparison

  • Watt

  • Milliwatt

  • Decibel (dB)

  • dBi

  • dBd

  • dBm

  • Inverse square law

• RF mathematics

  • Rule of 10s and 3s

• Received signal strength indicator (RSSI)

• Link budget

• Fade margin/system operating margin

• Two or more devices want to communicate.

• There must be a medium, a means, or a method for them to use to communicate.

• There must be a set of rules for them to use when they communicate. (This ...