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Isolators & circulators (0.15 to 40 GHz)

Circulators can be operated with a duplexer or isolator function.
A three port circulator, for example, is designed to enable transmission from port 1 (typically the transmitter line) to port 2 (typically the antenna line) in one direction (while port 3 is closed) and to enable transmission from port 2 to port 3 (typically the receiver or protection line) in the other direction (while port 2 is closed).
Just by connecting port 3 to the receiver system the circulator is operated as a duplexer; terminating port 2 with an impedance matched load turns the circulator into an isolator. Please note that operation as a duplexer is limited by power rating, as specified by the limits for the isolation between port 1 and port 3.
For coax circulators MIWEKO works exclusively with our partner Quest, a company that combines high end circulators with many years of experience in this technical area, and is also extremely flexible in supporting customization projects.
See also:
http://en.wikipedia.org/wiki/Circulator
http://www.radartutorial.de/17.bauteile/bt33.en.html

 

 

 

 

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