Rf Circulators

Written by Kelly Wand
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RF circulators are by their very nature isolators, despite the fact that they are designed very differently. At least three ports are built into each circulator, and the ports are each non-reciprocal. That means that signals that go into a port cannot travel back along the input line, even though the signal is free to travel to the port that lies next to the one through which it came.

Though the signal can travel to other ports, it can only do so in one direction, a feature that can greatly reduce signal reflection. Of course, stopping signal reflection is also what isolators do. So what makes RF circulators so special?

Uses of RF Circulators

Due to their three-port design, RF circulators are more suited to some projects than isolators. Circulators are particularly useful when dealing with a system involving an antenna and a receiver that is used for both transmission and reception. The three ports make it easy to both transmit and receive signals to and from the same system with minimal reflection worries.

Circulators also protect receivers from overload. These devices are made by many RF users, both amateur and professional. It's important to some sense of the credentials of those who supply your RF equipment. Some companies have been designing and selling RF systems and components for decades. Such companies are wonderful resources when one is looking for reliable RF products.


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