When we want to extend the coverage of handheld two-way radios, the first option is typically to incorporate repeater as a solution. However, a repeater isn’t the full answer. A repeater, more times than not, will put out much more power and have a better antenna system than the portable radios that it is communicating with.
This presents a unbalanced system where the “talk out” of the repeater is much better than the “talk out” of the handhelds. In this case, the usable radius of the system is much less than what it could be.