3 Port Circulator In Microwave

Military space and commercial applications.

3 port circulator in microwave. The 3 port circulator is formed by a 120 degree h plane waveguide and the 4 port circulator. How a circulator works. A signal input to port 2 will pass to port 3 but not back to port 1. Our distributed 3 port and 4 port circulators absorption loads and gasket seals are utilized in systems developed for industrial medical radar scientific and security applications.

The figure 1 depicts 3 port rf circulator. 3 port circulator s matrix and 4 port circulator s matrix. Since 1971 em design has been developing and fabricating high power rf and microwave waveguide components. A circulator is a passive non reciprocal three or four port device in which a microwave or radio frequency signal entering any port is transmitted to the next port in rotation only.

The beautiful thing about circulators is that they are non reciprocal. If a perfect test termination with a vswr equal to 1 00 were available to place on port 3 the resulting isolation from port 2 to port 1 would be 20db. A signal applied to port 1 will be passed to port 2 with minimum attenuation. The isolation measured is dependent on the vswr of both the termination and circulator port.

Low insertion loss high isolation high power handling. What are 3 port circulator and 4 port circulator. The arrow indicates the unidirectional flow any signals from port to port. As the larger sibling of the isolator the circulator is a three port device used to control the direction of signal flow rf energy in a circuit.

A circulator is a ferrite device ferrite is a class of materials with strange magnetic properties with usually three ports. Figure 1a shows a circulator where any port can be an input or an output. Circulator is a multiport device in which rf signal travels from one port to the next in one direction either clockwise or anti clockwise only. A port in this context is a point where an external waveguide or transmission line such as a microstrip line or a coaxial cable connects to the device for a three port circulator a signal applied to port 1.

3 port circulator and 4 port circulator. A circulator has a measured vswr of 1 22 for all three ports. Dual junction circulator frequency range 10mhz to 20ghz up to 500w power.