Ferrite Isolators
Figure 1: Isolator (Symbol)
Ferrite Isolators
An isolator is a
ferrite device
that can be constructed so that it allows microwave energy to pass in one direction but blocks energy
in the other direction. In this case a terminator is attached to connection 3 converting the reflected
energy of the connection 2 in heat.
The desired signal direction of the connection 1 to connection 2 passed through the isolator.
input-plug
output-jack
dummy-
load
load
Figure 2: Real isolator for 18 GHz
input-
plug
plug
output-
jack
jack
dummy-
load
load
Figure 2: Real isolator for 18 GHz
Charakteristics:
- pass attenuation: < 1 dB
- isolation: > 10 dB
Application examples:
- as a buffer stage after an oscillator
- to the prevention of repercussions
- to mode suppression in pass-direction
- to the insulation of assemblies of each other