Ferrite Isolators and Circulators

This is an application note from DiTom Microwave that discusses the fundamental and valuable role of ferrite isolators and circulators in RF systems.  They are passive, ferrite devices that act as traffic conductors for RF energy in a system, routing signals wherever a system designer needs them to go. Their ability to behave non-reciprocally (non-reversible, allowing energy to pass in only one direction through the device) when RF energy is applied to them is very important for a number of applications.