Isolation of a signal in a frequency band

1. How do you isolate radio frequencies?
2. What uses 1.6 GHz radio frequency?

How do you isolate radio frequencies?

Placing the transmitter or receiver in a fully enclosed container made of highly conductive metal, such as was done in this activity, is the most efficient way to interfere with radio waves.

What uses 1.6 GHz radio frequency?

The Iridium signal is a 1.6 GHz signal used in a system of satellite phones and had the additional advantage of being in a frequency range approximately midway be- tween the major cellular telephone frequencies in current use.