1. The imparting or interchange of thoughts, opinions, or information by speech, writing, or signs: The communication of the president’s speech was done with a fax machine.
2. The process or act of using words, sounds, signs, or behaviors to express or to exchange information or to express one's ideas, thoughts, feelings, etc. to another person or to people: There was a well planned schedule for the communication of sensitive data to the new officials.
3. Etymology: from Latin communicare, "to share, to divide out"; literally "to make common".

Striving to entertain and to inform: communication quotes.

The use of an electromagnetic wave to pass information between two points.

RFID reader antennas emit electromagnetic radiation (radio waves).

If an RFID tag is outside of one full wavelength of the reader, it is said to be in the "far field." If it is within one full wavelength away, it is said to be in the "near field."

The far field signal decays as the square of the distance from the antenna, while the near field signal decays as the cube of distance from the antenna.

So passive RFID systems that rely on far field communications (typically UHF and microwave systems) have a longer read range than those that use near field communications (typically low- and high-frequency systems).

RFID reader antennas emit electromagnetic radiation (radio waves).

If an RFID tag is within full wavelength of the reader, it is said to be in the "near field."

If it is more than the distance of one full wavelength away, it is said to be in the "far field."

The near field signal decays as the cube of distance from the antenna, while the far field signal decays as the square of the distance from the antenna.

So passive RFID systems that rely on near-field communication (typically low- and high-frequency systems) have a shorter read range than those that use far field communication (UHF and microwave systems).