4-Port Circulators in SCRF Applications

Performance of the waveguide 3-port junction and 4-port differential phase shift circulators in super-conducting accelerator applications.

 The use of high power ferrite devices is critical to the operation of accelerator systems to protect the HPA systems from reflected power and to also maintain an appropriate load condition to the HPA to ensure efficient and stable operation.

There are two choices of device which can be employed for this purpose, the 3-port junction circulator or the 4-port differential phase shift circulator.  These devices differ considerably in their mode of operation and present differing properties to the accelerator design engineer.

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