An RF circulator is a passive three-port device that directs the flow of RF energy from port 1 to port 2, from port 2 to port 3, and from port 3 to port 1 in a clockwise direction. It is used to isolate or direct RF energy in a circuit, and is commonly used in RF systems to protect sensitive equipment from high power signals or to improve the performance of power amplifiers.
There are several types of RF circulators available, including coaxial, drop-in, surface mount, and microstrip circulators.
Coaxial circulators are constructed using coaxial line and are designed to operate over a narrow frequency range. They are typically used in high power RF applications, such as radar and communication systems.
Drop-in circulators are designed to be installed in a waveguide or coaxial line, and are typically used in high power RF systems.
Surface mount circulators are designed for use in surface mount technology (SMT) and are suitable for use in low to medium power RF applications.
Microstrip circulators are constructed using microstrip line and are suitable for use in low power RF applications, such as cellular and wireless communication systems.
Overall, RF circulators are important components in a wide range of RF systems, and are used to improve the performance and reliability of these systems.
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