Waveguide circulators are three or four port devices used to create isolation between transmitted and received signals. Commonly, the Waveguide Circulators are used for many tasks including electronically steered antenna (AESA) arrays, satellite communications, and telecommunications applications such as mobile phones, etc.
A waveguide isolator is defined as the modified circulator with one port terminated with a matched impedance. It isolates the signal on the input side, from any kind of effects of conditions on its output side. This way it prevents a microwave source from getting detuned by a mismatched load.
Both of these devices can be used for preventing high powered transmitter outputs from sensitive receiver circuitry. These are manufactured in many variants having multiple ports for different purposes. Some of the industries use Waveguide Isolators, and Waveguide Circulators are listed as commercial marine radar, air traffic control, airborne satellite communications, missile seekers and space-based telecommunications.
The performance of Waveguide Circulators and Waveguide Isolators is measured using the parameters such as isolation, bandwidth, and insertion loss, etc. Users also consider other factors such as power handling, size, temperature range, and interconnect technology, etc.
Both the devices are available with different designs and trade-offs. Both the devices are used in the electronic applications ranging from a multitude of megahertz to tens of gigahertz. You can find a wide range of Waveguide Circulators and Waveguide Isolators on the RADITEK website.