The Cavity Resonator in Multicoupling Applications

If a number of users are multicoupled together on the same base station antenna, several
cavity resonators are coupled together with a precisely dimensioned cable harness.
The system (multicoupling to a single antenna) uses several cavity resonators
coupled together with a precisely dimensioned cable harness.
Insertion losses are typically 2 dB with a relative frequency separation of 1 percent.
With very high performance cavities, the separation can be reduced to 0.25 percent
with isolations of 20 dB. When used together with a ferrite isolator, isolations of 50 dB
are obtainable between adjacent transmitters.