What is Isolation And how to Get High Isolation

Handsun Company manufactures a selection of 3 port circulator (single circulator) or 4port circulator (double junction circulator/isolator). Dual junction circulator/isolator that you can get high isolation. Also can made three junction, four junction if you want get higher isolation. And isolation this parameter is used to specify the reverse loss characteristics of an isolator. The parameters isolation, VSWR, and insertion loss are required to specify an isolator whereas a circulator is completely defined by only the VSWR of the three ports and insertion loss. Although a circulator can be made into an isolator by terminating one port, it does not have an intrinsic isolation value. The isolation measured would be dependent on the VSWR of both the termination and the circulator port. Most isolators are specified at 20dB but value of 30dB can be obtained for narrow band applications. Example: A circulator has a measured VSWR of 1.25 for all three ports. 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. If a test termination with a VSWR equal to 1.05 were placed on Port 3, the resulting isolation from Port 2 to Port 1 would vary between 18.2 and 22.5dB depending on the phasing between the two VSWR’s. The resulting isolation value is a function of the VSWR of the test termination and how it may phase with the VSWR of the circulator port.
An isolator/circulator can be made with more than 3 ports if desired. Here table list some particular range parts that can get higher isolation and for you quick reference. Please don’t hesitate to contact us if any question or price info required.