Question

Problem 1. Using the FCC radio spectrum allocation table answer the following questions:
Find the frequency bands allocated to AM and FM radio, and TV broadcasting.
Find the frequency bands allocated to 1G, 2G, 3G, and 4G mobile.
What is the lowest allocated frequency? What may limit the use of lower frequencies?
What is the highest allocated frequency? What may limit the use of higher frequencies?

Answer 1

Frequency bands allocated to AM and FM radio, and TV broadcasting.

• Frequency bands allocated to 1G, 2G, 3G, and 4G mobile.

• The lowest allocated frequency is 3Hz(ELF). the carrier frequency is often lower than the frequency range of audible sound, which is considered to be 20 to 20,000 Hz. For this reason ELF radio cannot be modulated fast enough to reproduce sound, which is why it is only used for digital data at a very slow rate.

• The highest allocated frequency 3,000 GHz(3THz). Terahertz radiation can penetrate fabrics and plastics so it is dangerous to increase the frequency.