Isolators and Circulators

Nova Microwave, Inc.

Nova Microwave produces a broad range of circulators & isolators from 380 MHz to 23.6 GHz as follows:

Nova Microwave, Inc. is a Florida company, located in Clearwater, Florida specializing in the design, engineering and manufacturing of a broad range of Ferrite Circulators and Isolators.  Nova Microwave is a leader in technically differentiated electronic and radio frequency Ferrite Circulators and Isolators that connect, protect and control critical systems for the global microwave electronics market place including commercial and military wireless telecommunications. Management represents years of combined technology development, competitive price manufacturing, and sales experience. 

The selection of basic ferrite material and magnet material has a significant effect on the overall performance and cost of circulators and isolators. The power handling, insertion loss, and labor required to manufacture these circulators and isolators is very dependent on this material selection. The ferrite material and magnet material required for circulators and isolators; is a major cost contributor to the final circulator and isolator cost. Nova designers have developed custom programs to provide the optimum performance at the lowest cost.

Nova’s link http://www.novamicro.com/understanding-circulator-and-isolaters.php has been compiled from many technical papers. It has been summarized to present a simplified non-mathematical description that is used to highlight the operating characteristics of various circulator and isolator types. Although this paper is not intended to be a design guide it is hoped that the information presented will be useful to both the buyer and system engineers. A junction circulator is a 3-port device formed by a symmetrical Y-Junction strip line coupled to a magnetically biased ferrite material. When one of the ports is terminated, with either an internal or external termination, the device then becomes an isolator which isolates the incident and reflected signals.

Consideration of the following is necessary to understand the operation of a junction circulator or isolator. Nova’s website offers a technical discussion on theses items 

  • FERRITE REGION
  • MAGNETIC CIRCUIT
  • IMPEDANCE TRANSFORMATION
  • TRANSMISSION LINE GEOMETRY
  • CONNECTORS