Principle of RF isolator

A radio frequency isolator, also known as a unidirectional device, is a device that transmits electromagnetic waves in a unidirectional manner. When electromagnetic waves are transmitted in a forward direction, all power can be fed back to the load, causing significant attenuation of reflected waves from the load. This unidirectional transmission characteristic can be used to isolate the impact of load changes on the signal source. Taking field displacement isolators as an example, we will further explain the working principle of ferrite RF isolators.